Repository: jaywcjlove/swiftui-example Branch: main Commit: 28f92b904791 Files: 2852 Total size: 4.8 MB Directory structure: gitextract_gzhkv01i/ ├── .gitattributes ├── .github/ │ ├── FUNDING.yml │ └── workflows/ │ └── ci.yml ├── .gitignore ├── .idoc/ │ └── .filesStat.json ├── LICENSE ├── README.md ├── example/ │ ├── accessibility/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── star.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo6/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── advanced-state/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── alerts-and-menus/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Credits.rtf │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── SettingsView.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── animation/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo13/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── appendix-a/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── niagara-falls.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo13/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo14/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo15/ │ │ │ └── README.md │ │ ├── demo2/ │ │ │ └── README.md │ │ ├── demo3/ │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ └── README.md │ │ ├── demo6/ │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── cheat-sheet.md │ ├── composing-views/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── kenny.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo7/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── containers/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── PostNoSelectionPlaceholder.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── cross-platform/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo WatchKit App/ │ │ │ │ │ └── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── Demo WatchKit Extension/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── Complication.complicationset/ │ │ │ │ │ │ │ ├── Circular.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ │ ├── Extra Large.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ ├── Graphic Bezel.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ ├── Graphic Circular.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ ├── Graphic Corner.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ ├── Graphic Extra Large.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ ├── Graphic Large Rectangular.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ ├── Modular.imageset/ │ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ │ └── Utilitarian.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ComplicationController.swift │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ ├── NotificationController.swift │ │ │ │ │ ├── NotificationView.swift │ │ │ │ │ ├── Preview Content/ │ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── PushNotificationPayload.apns │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ ├── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ └── xcshareddata/ │ │ │ │ └── xcschemes/ │ │ │ │ ├── Demo WatchKit App (Complication).xcscheme │ │ │ │ ├── Demo WatchKit App (Notification).xcscheme │ │ │ │ └── Demo WatchKit App.xcscheme │ │ │ └── README.md │ │ └── demo4/ │ │ ├── Demo/ │ │ │ ├── Demo WatchKit App/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ └── Info.plist │ │ │ ├── Demo WatchKit Extension/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── Complication.complicationset/ │ │ │ │ │ │ ├── Circular.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ ├── Extra Large.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Graphic Bezel.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Graphic Circular.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Graphic Corner.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Graphic Extra Large.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Graphic Large Rectangular.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Modular.imageset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Utilitarian.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ComplicationController.swift │ │ │ │ ├── ContentView.swift │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ ├── NotificationController.swift │ │ │ │ ├── NotificationView.swift │ │ │ │ ├── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── PushNotificationPayload.apns │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── data/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── TextFile.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Main.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── Model.xcdatamodeld/ │ │ │ │ │ │ └── Model.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.xcdatamodeld/ │ │ │ │ │ │ ├── .xccurrentversion │ │ │ │ │ │ └── Shared.xcdatamodel/ │ │ │ │ │ │ └── contents │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Persistence.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── DemoApp.swift │ │ │ │ └── TextFile.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── drawing/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo4/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── forms/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo6/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── images-shapes-media/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── dog.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo13/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ └── macOS/ │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo14/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── rome.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── logo.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── singapore.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── introduction/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ ├── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ └── xcshareddata/ │ │ │ │ └── xcschemes/ │ │ │ │ └── Demo.xcscheme │ │ │ └── README.md │ │ └── demo2/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── lists/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo13/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── paul-hudson.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── presenting-views/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo6/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── quick-start/ │ │ ├── answering-the-big-question-should-you-learn-swiftui-uikit-or-both.md │ │ ├── dedication.md │ │ ├── dont-panic.md │ │ ├── frequently-asked-questions-about-swiftui.md │ │ ├── how-to-follow-this-quick-start-guide.md │ │ ├── migrating-from-uikit-to-swiftui.md │ │ ├── swiftui-vs-interface-builder-and-storyboards.md │ │ ├── what-is-swiftui.md │ │ └── whats-in-the-basic-template.md │ ├── responding-to-events/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ ├── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ └── xcshareddata/ │ │ │ │ └── xcschemes/ │ │ │ │ └── Demo.xcscheme │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── DemoApp.swift │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ ├── Demo2/ │ │ │ ├── Demo2/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo2App.swift │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo2.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── stacks-grids-scrollviews/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo13/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo14/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo15/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── singapore.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ └── macOS/ │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── niagara-falls.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.entitlements │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── taps-and-gestures/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── ireland.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── singapore.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── tooling/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── MySamplePackage/ │ │ │ │ ├── .gitignore │ │ │ │ ├── .swiftpm/ │ │ │ │ │ └── xcode/ │ │ │ │ │ └── package.xcworkspace/ │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Package.swift │ │ │ │ ├── README.md │ │ │ │ ├── Sources/ │ │ │ │ │ └── MySamplePackage/ │ │ │ │ │ └── MySamplePackage.swift │ │ │ │ └── Tests/ │ │ │ │ └── MySamplePackageTests/ │ │ │ │ └── MySamplePackageTests.swift │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── DemoApp.swift │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── transforming-views/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo13/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo14/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo15/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── laser-show.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo16/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── dog.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo17/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo18/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── cat.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo19/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo20/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo21/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo22/ │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── user-interface-controls/ │ │ ├── demo1/ │ │ │ └── README.md │ │ ├── demo10/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo11/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo12/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo13/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo14/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo15/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo16/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo17/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo18/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo19/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── sunset.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo20/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo21/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo22/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo23/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo24/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo25/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo26/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ └── macOS/ │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo27/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ └── macOS/ │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo28/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ └── macOS/ │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── logo.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo5/ │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ │ ├── project.pbxproj │ │ │ │ │ └── project.xcworkspace/ │ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ │ └── xcshareddata/ │ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ │ ├── Shared/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ └── DemoApp.swift │ │ │ │ ├── iOS/ │ │ │ │ │ └── Info.plist │ │ │ │ └── macOS/ │ │ │ │ ├── Info.plist │ │ │ │ └── macOS.entitlements │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ ├── iOS/ │ │ │ │ └── Info.plist │ │ │ └── macOS/ │ │ │ ├── Info.plist │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── view-layout/ │ │ ├── demo1/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo2/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo3/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo4/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo5/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── Contents.json │ │ │ │ │ │ └── laser-show.imageset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ ├── Preview Content/ │ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── TossResult.swift │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo6/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo7/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ ├── demo8/ │ │ │ ├── Demo/ │ │ │ │ ├── Demo/ │ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── ContentView.swift │ │ │ │ │ ├── Demo.entitlements │ │ │ │ │ ├── DemoApp.swift │ │ │ │ │ ├── Info.plist │ │ │ │ │ └── Preview Content/ │ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ └── README.md │ │ └── demo9/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── DemoApp.swift │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ └── working-with-static-text/ │ ├── demo1/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo10/ │ │ ├── Demo/ │ │ │ ├── Demo.xcodeproj/ │ │ │ │ ├── project.pbxproj │ │ │ │ └── project.xcworkspace/ │ │ │ │ ├── contents.xcworkspacedata │ │ │ │ └── xcshareddata/ │ │ │ │ └── IDEWorkspaceChecks.plist │ │ │ ├── Shared/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ └── DemoApp.swift │ │ │ └── macOS/ │ │ │ └── macOS.entitlements │ │ └── README.md │ ├── demo11/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo12/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ ├── IDEWorkspaceChecks.plist │ │ │ └── swiftpm/ │ │ │ └── Package.resolved │ │ └── README.md │ ├── demo2/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo3/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo4/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo5/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo6/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo7/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ ├── demo8/ │ │ ├── Demo/ │ │ │ ├── Demo/ │ │ │ │ ├── Assets.xcassets/ │ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ │ └── Contents.json │ │ │ │ │ └── Contents.json │ │ │ │ ├── ContentView.swift │ │ │ │ ├── Demo.entitlements │ │ │ │ ├── DemoApp.swift │ │ │ │ ├── Info.plist │ │ │ │ └── Preview Content/ │ │ │ │ └── Preview Assets.xcassets/ │ │ │ │ └── Contents.json │ │ │ └── Demo.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ └── project.xcworkspace/ │ │ │ ├── contents.xcworkspacedata │ │ │ └── xcshareddata/ │ │ │ └── IDEWorkspaceChecks.plist │ │ └── README.md │ └── demo9/ │ ├── Demo/ │ │ ├── Demo/ │ │ │ ├── Assets.xcassets/ │ │ │ │ ├── AccentColor.colorset/ │ │ │ │ │ └── Contents.json │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ └── Contents.json │ │ │ │ └── Contents.json │ │ │ ├── ContentView.swift │ │ │ ├── Demo.entitlements │ │ │ ├── DemoApp.swift │ │ │ ├── Info.plist │ │ │ └── Preview Content/ │ │ │ └── Preview Assets.xcassets/ │ │ │ └── Contents.json │ │ └── Demo.xcodeproj/ │ │ ├── project.pbxproj │ │ └── project.xcworkspace/ │ │ ├── contents.xcworkspacedata │ │ └── xcshareddata/ │ │ └── IDEWorkspaceChecks.plist │ └── README.md ├── idoc.chapters.yml ├── idoc.yml ├── package.json └── renovate.json ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitattributes ================================================ *.md linguist-detectable=true ================================================ FILE: .github/FUNDING.yml ================================================ github: [jaywcjlove] ko_fi: jaywcjlove buy_me_a_coffee: jaywcjlove custom: ["https://www.paypal.me/kennyiseeyou", "https://jaywcjlove.github.io/#/sponsor"] ================================================ FILE: .github/workflows/ci.yml ================================================ name: CI on: push: branches: - main jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - uses: actions/setup-node@v4 with: node-version: 20 - run: npm install - run: npm run build - name: Generate Contributors Images uses: jaywcjlove/github-action-contributors@main with: filter-author: (renovate\[bot\]|renovate-bot|dependabot\[bot\]) output: dist/CONTRIBUTORS.svg avatarSize: 42 - name: Create Tag id: create_tag uses: jaywcjlove/create-tag-action@main with: package-path: ./package.json - name: Deploy Website uses: peaceiris/actions-gh-pages@v4 with: user_name: 'github-actions[bot]' user_email: 'github-actions[bot]@users.noreply.github.com' commit_message: ${{ github.event.head_commit.message }} github_token: ${{ secrets.GITHUB_TOKEN }} publish_dir: ./dist - name: Generate Changelog id: changelog uses: jaywcjlove/changelog-generator@main with: token: ${{ secrets.GITHUB_TOKEN }} filter-author: (jaywcjlove|小弟调调™|dependabot\[bot\]|Renovate Bot) filter: (^[\s]+?[R|r]elease)|(^[R|r]elease) - name: Create Release uses: ncipollo/release-action@v1 if: steps.create_tag.outputs.successful with: allowUpdates: true token: ${{ secrets.GITHUB_TOKEN }} name: ${{ steps.create_tag.outputs.version }} tag: ${{ steps.create_tag.outputs.version }} body: | [![Buy me a coffee](https://img.shields.io/badge/Buy%20me%20a%20coffee-048754?logo=buymeacoffee)](https://jaywcjlove.github.io/#/sponsor) Documentation ${{ steps.changelog.outputs.tag }}: https://raw.githack.com/jaywcjlove/swiftui-example/${{ steps.changelog.outputs.gh-pages-short-hash }}/index.html Comparing Changes: ${{ steps.changelog.outputs.compareurl }} ${{ steps.changelog.outputs.changelog }} ================================================ FILE: .gitignore ================================================ # Xcode # # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore .DS_Store package-lock.json node_modules dist ## User settings xcuserdata/ ## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9) *.xcscmblueprint *.xccheckout ## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4) build/ DerivedData/ *.moved-aside *.pbxuser !default.pbxuser *.mode1v3 !default.mode1v3 *.mode2v3 !default.mode2v3 *.perspectivev3 !default.perspectivev3 ## Obj-C/Swift specific *.hmap ## App packaging *.ipa *.dSYM.zip *.dSYM ## Playgrounds timeline.xctimeline playground.xcworkspace # Swift Package Manager # # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies. # Packages/ # Package.pins # Package.resolved # *.xcodeproj # # Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata # hence it is not needed unless you have added a package configuration file to your project # .swiftpm .build/ # CocoaPods # # We recommend against adding the Pods directory to your .gitignore. However # you should judge for yourself, the pros and cons are mentioned at: # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control # # Pods/ # # Add this line if you want to avoid checking in source code from the Xcode workspace # *.xcworkspace # Carthage # # Add this line if you want to avoid checking in source code from Carthage dependencies. # Carthage/Checkouts Carthage/Build/ # Accio dependency management Dependencies/ .accio/ # fastlane # # It is recommended to not store the screenshots in the git repo. # Instead, use fastlane to re-generate the screenshots whenever they are needed. # For more information about the recommended setup visit: # https://docs.fastlane.tools/best-practices/source-control/#source-control fastlane/report.xml fastlane/Preview.html fastlane/screenshots/**/*.png fastlane/test_output # Code Injection # # After new code Injection tools there's a generated folder /iOSInjectionProject # https://github.com/johnno1962/injectionforxcode iOSInjectionProject/ ================================================ FILE: .idoc/.filesStat.json ================================================ { "example/quick-start/answering-the-big-question-should-you-learn-swiftui-uikit-or-both.md": { "atime": "2021-11-04T08:03:23.058Z", "mtime": "2021-11-04T08:03:20.622Z", "ctime": "2021-11-04T08:03:20.622Z", "birthtime": "2021-11-04T07:51:51.533Z" }, "example/quick-start/dedication.md": { "atime": "2021-11-04T08:04:51.867Z", "mtime": "2021-11-04T08:04:50.597Z", "ctime": "2021-11-04T08:04:50.597Z", "birthtime": "2021-11-04T07:51:51.534Z" }, "example/quick-start/dont-panic.md": { "atime": "2021-11-04T07:55:01.016Z", "mtime": "2021-11-04T07:54:59.662Z", "ctime": "2021-11-04T07:54:59.663Z", "birthtime": "2021-11-04T07:51:51.533Z" }, "example/quick-start/frequently-asked-questions-about-swiftui.md": { "atime": "2021-11-04T08:02:41.101Z", "mtime": "2021-11-04T08:02:40.635Z", "ctime": 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"2021-10-17T18:15:35.847Z", "ctime": "2021-10-17T18:15:35.847Z", "birthtime": "2021-03-19T08:55:51.495Z" }, "example/lists/demo6/README.md": { "atime": "2021-10-17T18:07:45.914Z", "mtime": "2021-10-17T18:07:45.516Z", "ctime": "2021-10-17T18:07:45.516Z", "birthtime": "2021-03-19T08:55:42.879Z" }, "example/tooling/demo7/MySamplePackage/README.md": { "atime": "2021-11-02T08:48:10.502Z", "mtime": "2021-10-19T11:56:08.504Z", "ctime": "2021-10-19T11:56:08.504Z", "birthtime": "2021-10-19T11:56:08.503Z" }, "example/tooling/demo7/README.md": { "atime": "2021-10-20T01:15:56.290Z", "mtime": "2021-10-20T01:15:55.052Z", "ctime": "2021-10-20T01:15:55.052Z", "birthtime": "2021-10-19T08:31:33.571Z" }, "example/cheat-sheet.md": { "atime": "2022-04-22T10:31:33.046Z", "mtime": "2022-04-22T10:31:30.749Z", "ctime": "2022-04-22T10:31:30.749Z", "birthtime": "2021-10-17T17:51:26.701Z" } } ================================================ FILE: LICENSE ================================================ MIT License Copyright (c) 2021 小弟调调™ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ================================================ FILE: README.md ================================================
Using my app is also a way to support me:
Scap: Screenshot & Markup Edit Screen Test Deskmark Keyzer Vidwall Hub VidCrop Vidwall Mousio Hint Mousio Musicer Audioer FileSentinel FocusCursor Videoer KeyClicker DayBar Iconed Mousio Quick RSS Quick RSS Web Serve Copybook Generator DevTutor for SwiftUI RegexMate Time Passage Iconize Folder Textsound Saver Create Custom Symbols DevHub Resume Revise Palette Genius Symbol Scribe
![SwiftUI by Example](assets/logo.jpg) [![Buy me a coffee](https://img.shields.io/badge/Buy_Me_a_Coffee-ffdd00?logo=buy-me-a-coffee&logoColor=black)](https://jaywcjlove.github.io/#/sponsor) [![Follow On X](https://img.shields.io/badge/Follow%20on%20X-333333?logo=x&logoColor=white)](https://x.com/jaywcjlove) **SwiftUI 示例、技巧和技术集合**：这个集合旨在帮助您构建应用程序、解决问题，并了解 SwiftUI 的实际工作方式。主要内容来源于 [`hackingwithswift.com`](https://www.hackingwithswift.com/quick-start/swiftui)，所有示例都是在 macOS Big Sur 系统上运行，基于 Xcode `12.4` 开发。 此外，我还制作了一个 Swift/SwiftUI 速查手册应用，您可以通过速查手册快速查阅资料，边动手开发应用，轻松上手。您可以通过以下链接下载：

DevTutor for SwiftUI AppStore DevTutor for SwiftUI AppStore iOS

🚧 **注意事项：** 这些示例适用于 macOS/iOS 上的 Swift 编程（主要是 macOS），文字解释内容是通过 Google 翻译完成的，英文水平有限，欢迎大家参与修改和完善。部分内容进行了添加或修改，并且有些部分是新增的。如果您对 Swift 语法不熟悉，可以参考 [`Swift 语法入门`](https://github.com/jaywcjlove/swift-tutorial)，而如果对 SwiftUI 不熟悉，提供了一个 [`SwiftUI 速查手册`](./example/cheat-sheet.md) 供您参考。 🚧 **版权声明：** 内容版权归 [`hackingwithswift.com`](https://www.hackingwithswift.com/quick-start/swiftui) 原作者所有，本站不承担任何法律责任或风险，且不以商业为目的。如果您认为本站的内容侵犯了您的版权，请及时联系我们。同时，本站无法完全保证内容的准确性，使用本站内容所带来的任何风险由用户自行承担。使用本站即表示您已接受本站的使用条款和隐私政策。 为了方便在 Swift 中进行颜色拾取，提供了一个 Web 小工具 [UI-Color](https://uiwjs.github.io/ui-color/)，此外还提供了一个桌面应用 [Palette Genius](https://github.com/jaywcjlove/palette-genius)，该应用汇集了许多颜色，并且包含一个颜色选择转换器。欢迎大家提出改进意见。 [`SwiftUI 论坛`](https://github.com/jaywcjlove/swiftui-example/discussions) 只是讨论 SwiftUI 事物的地方 [论坛→](https://github.com/jaywcjlove/swiftui-example/discussions)。想法来源于 [sindresorhus/swiftui](https://github.com/sindresorhus/swiftui) ## 示例目录 - [介绍](#介绍) - [建立一个完整的项目](#建立一个完整的项目) - [使用静态文本](#使用静态文本) - [图像形状和媒体](#图像形状和媒体) - [视图布局](#视图布局) - [堆栈网格滚动视图](#堆栈网格滚动视图) - [用户界面控件](#用户界面控件) - [响应事件](#响应事件) - [点击和手势](#点击和手势) - [状态](#状态) - [列表](#列表) - [表单](#表单) - [容器](#容器) - [对话框和菜单](#对话框和菜单) - [切换界面](#切换界面) - [转换视图](#转换视图) - [绘画](#绘画) - [动画](#动画) - [排版视图](#排版视图) - [跨平台-swiftui](#跨平台-swiftui) - [数据](#数据) - [辅助功能](#辅助功能) - [工具](#工具) - [附录a](#附录a) - [`速查手册`](./example/cheat-sheet.md) ## 介绍 简要介绍 SwiftUI 的基础 - [不要惊慌！](example/quick-start/dont-panic.md) - [什么是 SwiftUI?](example/quick-start/what-is-swiftui.md) - [SwiftUI 与 Interface Builder 和 storyboards](example/quick-start/swiftui-vs-interface-builder-and-storyboards.md) - [有关 SwiftUI 的常见问题](example/quick-start/frequently-asked-questions-about-swiftui.md) - [回答这个大问题：你应该学习 SwiftUI，UIKit，还是两者都学？](example/quick-start/answering-the-big-question-should-you-learn-swiftui-uikit-or-both.md) - [如何遵循这个快速入门指南？](example/quick-start/how-to-follow-this-quick-start-guide.md) - [从 UIKit 迁移到 SwiftUI](example/quick-start/migrating-from-uikit-to-swiftui.md) - [基本模板是什么？](example/quick-start/whats-in-the-basic-template.md) - [贡献](example/quick-start/dedication.md) ## 建立一个完整的项目 通过实际的应用程序项目学习 SwiftUI - [创建一个 `SwiftUI` 项目](example/introduction/demo1/README.md) - [使用列表构建菜单](example/introduction/demo2/README.md) ## 使用静态文本 整齐地布局文本 - [如何使用 `Text` 视图创建静态标签？](example/working-with-static-text/demo1/README.md) - [如何使用字体，颜色，行距等为文本视图设置样式？](example/working-with-static-text/demo2/README.md) - [如何使用 `multilineTextAlignment()` 调整文本对齐方式？](example/working-with-static-text/demo3/README.md) - [如何在文本视图中设置文本格式？](example/working-with-static-text/demo4/README.md) - [如何在文字中的字母之间增加空格？](example/working-with-static-text/demo5/README.md) - [如何在文字检视中格式化日期？](example/working-with-static-text/demo6/README.md) - [如何使用 `textCase()` 使 `TextField` 大写或小写？](example/working-with-static-text/demo7/README.md) - [如何使用 `Label` 并排显示文本和图标？](example/working-with-static-text/demo8/README.md) - [如何使用 `redacted()` 将内容标记为占位符？](example/working-with-static-text/demo9/README.md) - [如何使用 `privacySensitive()` 将内容标记为私有?](example/working-with-static-text/demo10/README.md) - [如何在文本中呈现 `Markdown` 内容？](example/working-with-static-text/demo11/README.md) - [如何让用户选择文本？](example/working-with-static-text/demo12/README.md) ## 图像，形状和媒体 绘制图标，圆形，渐变等 - [如何使用图像视图绘制图像？](example/images-shapes-media/demo1/README.md) - [如何调整图像适合其空间的展示方式？](example/images-shapes-media/demo2/README.md) - [如何平铺图像？](example/images-shapes-media/demo3/README.md) - [如何使用SF符号渲染图像？](example/images-shapes-media/demo4/README.md) - [如何渲染渐变？](example/images-shapes-media/demo5/README.md) - [如何使用图像和其他视图作为背景？](example/images-shapes-media/demo6/README.md) - [如何显示实体形状？](example/images-shapes-media/demo7/README.md) - [如何同时填充和描边形状？](example/images-shapes-media/demo8/README.md) - [如何使用 `trim()` 绘制实体形状的一部分？](example/images-shapes-media/demo9/README.md) - [什么时候应该使用 `ContainerRelativeShape`？](example/images-shapes-media/demo10/README.md) - [如何使用 `VideoPlayer` 播放电影？](example/images-shapes-media/demo11/README.md) - [如何使用 `SpriteView` 集成 `SpriteKit`？](example/images-shapes-media/demo12/README.md) - [如何从 URL 加载远程图像？](example/images-shapes-media/demo13/README.md) - [如何使用 SF Symbols 获得自定义颜色和透明度？](example/images-shapes-media/demo14/README.md) ## 视图布局 布局大小，优先级和间距 - [如何给视图定制 `frame`？](example/view-layout/demo1/README.md) - [如何使用 `padding` 来控制各个视图之间的间距？](example/view-layout/demo2/README.md) - [如何使用 `GeometryReader` 提供相对大小？](example/view-layout/demo3/README.md) - [如何将内容放置在安全区域之外？](example/view-layout/demo4/README.md) - [如何返回不同的视图类型？](example/view-layout/demo5/README.md) - [如何使用 `ForEach` 循环创建视图？](example/view-layout/demo6/README.md) - [如何使用 `layoutPriority()` 控制布局优先级？](example/view-layout/demo7/README.md) - [如何使两个视图具有相同的宽度或高度？](example/view-layout/demo8/README.md) - [如何使用 `foregroundStyle()` 提供视觉结构？](example/view-layout/demo9/README.md) ## 堆栈，网格，滚动视图 以结构化方式定位视图 - [如何使用 `VStack` 和 `HStack` 创建堆栈？](example/stacks-grids-scrollviews/demo1/README.md) - [如何使用对齐 `alignment` 和间距 `spacing` 自定义堆栈布局？](example/stacks-grids-scrollviews/demo2/README.md) - [如何使用 `Spacer` 将视图强制移到堆栈中的一侧？](example/stacks-grids-scrollviews/demo3/README.md) - [如何制作固定尺寸的 `Spacer`？](example/stacks-grids-scrollviews/demo4/README.md) - [如何使用 `ZStack` 在彼此之上叠加视图？](example/stacks-grids-scrollviews/demo5/README.md) - [如何使用 `zIndex` 更改视图分层的顺序？](example/stacks-grids-scrollviews/demo6/README.md) - [如何使用尺寸类创建不同的布局？](example/stacks-grids-scrollviews/demo7/README.md) - [如何根据大小类在 `HStack` 和 `VStack` 之间自动切换？](example/stacks-grids-scrollviews/demo8/README.md) - [如何使用 `ScrollView` 添加水平和垂直滚动？](example/stacks-grids-scrollviews/demo9/README.md) - [如何使用 `ScrollViewReader` 使滚动视图移动到某个位置？](example/stacks-grids-scrollviews/demo10/README.md) - [如何使用 `ScrollView` 和 `GeometryReader` 创建3D效果(如Cover Flow)？](example/stacks-grids-scrollviews/demo11/README.md) - [如何使用 `LazyVGrid` 和 `LazyHGrid` 在网格中放置视图？](example/stacks-grids-scrollviews/demo12/README.md) - [如何使用 `LazyVStack` 和 `LazyHStack` 延迟加载视图？](example/stacks-grids-scrollviews/demo13/README.md) - [如何使用 `HSplitViews` 创建左中右三栏布局？](example/stacks-grids-scrollviews/demo14/README.md) - [如何添加视觉效果模糊？](example/stacks-grids-scrollviews/demo15/README.md) ## 用户界面控件 响应交互并控制程序状态 - [使用状态](example/user-interface-controls/demo1/README.md) - [如何创建可点击的按钮？](example/user-interface-controls/demo2/README.md) - [如何禁用 `Button` 和 `NavigationLink` 中的图像的覆盖颜色？](example/user-interface-controls/demo3/README.md) - [如何从 `TextField` 读取文本？](example/user-interface-controls/demo4/README.md) - [如何在 `TextField` 上添加边框？](example/user-interface-controls/demo5/README.md) - [如何将占位符添加到 `TextField`？](example/user-interface-controls/demo6/README.md) - [如何在 `TextField` 中禁用自动更正？](example/user-interface-controls/demo7/README.md) - [如何关闭 `TextField` 的键盘？](example/user-interface-controls/demo8/README.md) - [如何格式化数字的 `TextField`？](example/user-interface-controls/demo9/README.md) - [如何使用 `SecureField` 创建安全的文本字段？](example/user-interface-controls/demo10/README.md) - [如何创建拨动开关？](example/user-interface-controls/demo11/README.md) - [如何创建滑块 `Slider` 并从中读取值？](example/user-interface-controls/demo12/README.md) - [如何创建选择器 `Picker` 并从中读取值？](example/user-interface-controls/demo13/README.md) - [如何创建日期选择器 `DatePicker` 并从中读取值？](example/user-interface-controls/demo14/README.md) - [如何创建分段控件并从中读取值？](example/user-interface-controls/demo15/README.md) - [如何创建步进器 `Stepper` 并从中读取值？](example/user-interface-controls/demo16/README.md) - [如何使用 `labelsHidden()` 隐藏 `Picker`，`Stepper`，`Toggle` 等标签？](example/user-interface-controls/demo17/README.md) - [如何使用文本编辑器创建多行可编辑文本 `TextEditor`？](example/user-interface-controls/demo18/README.md) - [如何让用户使用 `ColorPicker` 选择颜色？](example/user-interface-controls/demo19/README.md) - [如何使用 `ProgressView` 显示任务的进度？](example/user-interface-controls/demo20/README.md) - [如何使用 `ProgressView` 显示不确定的进度？](example/user-interface-controls/demo21/README.md) - [如何显示地图 `Map` 视图？](example/user-interface-controls/demo22/README.md) - [如何在地图 `Map` 视图中显示注释？](example/user-interface-controls/demo23/README.md) - [如何在 `Safari` 中打开 Web 链接？](example/user-interface-controls/demo24/README.md) - [如何设置可编辑文本 `TextEditor` 背景颜色？](example/user-interface-controls/demo25/README.md) - [如何自定义 `TextField`、`SecureField` 和 `TextEditor` 的提交按钮？](example/user-interface-controls/demo26/README.md) - [当用户提交 TextField 时如何执行事件？](example/user-interface-controls/demo27/README.md) - [如何获得突出的边框按钮？](example/user-interface-controls/demo28/README.md) ## 响应事件 快捷方式，旋转方式和外观 - [如何使用 `scenePhase` 检测您的应用何时移至背景或前景？](example/responding-to-events/demo1/README.md) - [如何响应查看生命周期事件：`onAppear()` 和 `onDisappear()` ？](example/responding-to-events/demo2/README.md) - [如何使用 `keyboardShortcut()` 添加键盘快捷键？](example/responding-to-events/demo3/README.md) - [如何控制应用启动时显示的视图？](example/responding-to-events/demo4/README.md) - [应用启动时如何运行代码？](example/responding-to-events/demo5/README.md) - [如何将 `AppDelegate` 添加到 SwiftUI 应用？](example/responding-to-events/demo6/README.md) - [如何检测设备旋转？](example/responding-to-events/demo7/README.md) - [如何在键盘上添加工具栏？](example/responding-to-events/demo8/README.md) - [显示视图时如何运行异步任务？](example/responding-to-events/demo9/README.md) ## 点击和手势 滑动，轻击，摇动和其他输入 - [如何在视图中添加手势识别器？](example/taps-and-gestures/demo1/README.md) - [如何阅读点击和双击手势？](example/taps-and-gestures/demo2/README.md) - [如何使用 `highPriorityGesture()` 强制一个手势先识别另一个手势？](example/taps-and-gestures/demo3/README.md) - [如何使用 `simultaneousGesture()` 同时识别两个手势？](example/taps-and-gestures/demo4/README.md) - [如何使用 `sequenced(before:)` 创建手势链？](example/taps-and-gestures/demo5/README.md) - [如何检测到用户将鼠标悬停在视图上？](example/taps-and-gestures/demo6/README.md) - [如何检测摇动手势？](example/taps-and-gestures/demo7/README.md) - [如何使用 `contentShape()` 控制视图的可点击区域？](example/taps-and-gestures/demo8/README.md) - [如何使用 `allowsHitTesting()` 禁用视图的点击？](example/taps-and-gestures/demo9/README.md) ## 状态 响应交互并控制程序状态 - [`@ObservedObject`，`@State` 和 `@EnvironmentObject` 有什么区别？](example/advanced-state/demo1/README.md) - [如何使用 `@StateObject` 创建和监视外部对象？](example/advanced-state/demo2/README.md) - [如何使用 `@ObservedObject` 管理外部对象的状态？](example/advanced-state/demo3/README.md) - [如何使用 `@EnvironmentObject` 在视图之间共享数据？](example/advanced-state/demo4/README.md) - [如何使用 `objectWillChange` 手动发送状态更新？](example/advanced-state/demo5/README.md) - [如何创建常量绑定？](example/advanced-state/demo6/README.md) - [如何创建自定义绑定？](example/advanced-state/demo7/README.md) - [如何在 `SwiftUI` 中使用计时器？](example/advanced-state/demo8/README.md) - [当使用 `onChange()` 改变状态时如何运行一些代码？](example/advanced-state/demo9/README.md) ## 列表 创建数据滚动表 - [使用列表 `List`](example/lists/demo1/README.md) - [如何创建静态物品列表？](example/lists/demo2/README.md) - [如何创建动态项目列表？](example/lists/demo3/README.md) - [如何让用户从列表中删除行？](example/lists/demo4/README.md) - [如何让用户在列表中移动行？](example/lists/demo5/README.md) - [如何将 `Section` 添加到列表？](example/lists/demo6/README.md) - [如何使用 `EditButton` 启用对列表的编辑？](example/lists/demo7/README.md) - [如何使用 `listRowBackground()` 设置列表行的背景色？](example/lists/demo8/README.md) - [如何创建分组和插入分组列表？](example/lists/demo9/README.md) - [如何创建扩展列表？](example/lists/demo10/README.md) - [如何滚动到列表中的特定行？](example/lists/demo11/README.md) - [如何允许列表中的行选择？](example/lists/demo12/README.md) - [如何使用隐式堆栈？](example/lists/demo13/README.md) ## 表单 快速有效地获得用户输入 - [使用表单 `Form`](example/forms/demo1/README.md) - [基本表格设计](example/forms/demo2/README.md) - [将表格分为几个部分](example/forms/demo3/README.md) - [表单选择器 `Pickers`](example/forms/demo4/README.md) - [启用和禁用表单中的元素](example/forms/demo5/README.md) - [显示和隐藏表单行](example/forms/demo6/README.md) ## 容器 将视图放置在导航控制器等中 - [使用容器](example/containers/demo1/README.md) - [如何在导航视图中嵌入视图？](example/containers/demo2/README.md) - [如何将栏项目添加到导航视图？](example/containers/demo3/README.md) - [如何使用 `TabView` 将视图嵌入选项卡栏中？](example/containers/demo4/README.md) - [如何使用 `tabViewStyle()` 创建内容的滚动页面？](example/containers/demo5/README.md) - [如何将视图组合 `Group` 在一起？](example/containers/demo6/README.md) - [如何隐藏和显示状态栏？](example/containers/demo7/README.md) - [如何使用 `DisclosureGroup` 隐藏和显示内容？](example/containers/demo8/README.md) - [如何创建工具栏并向其中添加按钮？](example/containers/demo9/README.md) - [如何为 `iPadOS` 添加侧边栏？](example/containers/demo10/README.md) - [如何隐藏和显示 `NavigationView` 侧边栏？](example/containers/demo11/README.md) ## 对话框和菜单 发生某些情况时显示模式通知 - [使用简介](example/alerts-and-menus/demo1/README.md) - [如何显示 `alert`？](example/alerts-and-menus/demo2/README.md) - [如何为 `alert` 按钮添加动作？](example/alerts-and-menus/demo3/README.md) - [如何在单个视图中显示多个 `alert`？](example/alerts-and-menus/demo4/README.md) - [如何显示动作面板？](example/alerts-and-menus/demo5/README.md) - [如何显示上下文菜单？](example/alerts-and-menus/demo6/README.md) - [如何使用 `appStoreOverlay()` 推荐另一个应用程序？](example/alerts-and-menus/demo7/README.md) - [按下按钮时如何显示菜单？](example/alerts-and-menus/demo8/README.md) - [如何让用户从菜单中选择选项？](example/alerts-and-menus/demo9/README.md) - [如何更改 macOS 应用中主菜单？](example/alerts-and-menus/demo10/README.md) - [如何添加偏好设置界面？](example/alerts-and-menus/demo11/README.md) ## 切换界面 将您的用户从一个视图移动到另一个视图 - [如何将新视图推送到 `NavigationView` 上？](example/presenting-views/demo1/README.md) - [点击列表行时如何推送新视图？](example/presenting-views/demo2/README.md) - [如何在 `SwiftUI` 中使用程序化导航？](example/presenting-views/demo3/README.md) - [如何使用 `sheets` 呈现新视图？](example/presenting-views/demo4/README.md) - [如何使视图自行关闭？](example/presenting-views/demo5/README.md) - [如何显示弹出视图？](example/presenting-views/demo6/README.md) ## 转换视图 剪辑，大小，比例，旋转等 - [如何使用其偏移量调整视图的位置 `offset`？](example/transforming-views/demo1/README.md) - [如何为视图周围的填充着色？](example/transforming-views/demo2/README.md) - [如何堆叠修改器以创建更高级的效果？](example/transforming-views/demo3/README.md) - [如何在视图周围绘制边框？](example/transforming-views/demo4/README.md) - [如何在视图内绘制边框？](example/transforming-views/demo5/README.md) - [如何创建行军蚂蚁边框动画效果？](example/transforming-views/demo6/README.md) - [如何在视图周围绘制阴影？](example/transforming-views/demo7/README.md) - [如何裁剪视图，以便仅部分可见？](example/transforming-views/demo8/README.md) - [如何旋转视图？](example/transforming-views/demo9/README.md) - [如何旋转 3D 视图？](example/transforming-views/demo10/README.md) - [如何放大或缩小视图？](example/transforming-views/demo11/README.md) - [如何圆角化一个视图？](example/transforming-views/demo12/README.md) - [如何调整视图的不透明度？](example/transforming-views/demo13/README.md) - [如何调整视图的强调色？](example/transforming-views/demo14/README.md) - [如何用一个视图掩盖另一个视图？](example/transforming-views/demo15/README.md) - [如何模糊视图？](example/transforming-views/demo16/README.md) - [如何将视图融合在一起？](example/transforming-views/demo17/README.md) - [如何通过着色，去饱和等来调整视图？](example/transforming-views/demo18/README.md) - [使用 `ButtonStyle` 自定义按钮](example/transforming-views/demo19/README.md) - [使用 `ProgressViewStyle` 自定义 `ProgressView`](example/transforming-views/demo20/README.md) - [使用 `ToggleStyle` 自定义 `Toggle`](example/transforming-views/demo21/README.md) - [如何更改 `List` `TextEditor` 等的背景色](example/transforming-views/demo22/README.md) ## 绘画 使用自定义形状控制渲染 - [SwiftUI 的内置形状](example/drawing/demo1/README.md) - [如何绘制自定义路径？](example/drawing/demo2/README.md) - [如何绘制多边形和星星？](example/drawing/demo3/README.md) - [如何画一个棋盘？](example/drawing/demo4/README.md) ## 动画 通过运动使您的界面栩栩如生 - [如何创建基本动画？](example/animation/demo1/README.md) - [如何制作弹簧动画？](example/animation/demo2/README.md) - [如何为绑定值的变化制作动画？](example/animation/demo3/README.md) - [如何创建显式动画？](example/animation/demo4/README.md) - [如何延迟动画？](example/animation/demo5/README.md) - [视图出现后如何立即启动动画？](example/animation/demo6/README.md) - [如何在一个视图中应用多个动画？](example/animation/demo7/README.md) - [如何使用 matchedGeometryEffect() 将动画从一个视图同步到另一个视图？](example/animation/demo8/README.md) - [如何通过过渡添加和删除视图？](example/animation/demo9/README.md) - [如何创建不对称过渡？](example/animation/demo10/README.md) - [如何创建自定义过渡？](example/animation/demo11/README.md) - [如何设置文字大小的动画？](example/animation/demo12/README.md) - [如何用事务覆盖动画？](example/animation/demo13/README.md) ## 排版视图 使您的UI结构更易于理解 - [如何创建和组合自定义视图？](example/composing-views/demo1/README.md) - [如何将文本视图结合在一起？](example/composing-views/demo2/README.md) - [如何将视图存储为属性？](example/composing-views/demo3/README.md) - [如何创建自定义修改程序？](example/composing-views/demo4/README.md) - [如何为 `SwiftUI` 包装自定义 `UIView`？](example/composing-views/demo5/README.md) - [如何为 `UIViewRepresentable` 结构创建修饰符？](example/composing-views/demo6/README.md) - [如何将图像插入文本？](example/composing-views/demo7/README.md) ## 跨平台 SwiftUI 学习让您的应用在任何地方都看起来很棒 - [学习一次，随处应用](example/cross-platform/demo1/README.md) - [如何在 `macOS` 上获取半透明列表？](example/cross-platform/demo2/README.md) - [如何在 `watchOS` 上制作轮播列表？](example/cross-platform/demo3/README.md) - [如何使用 `digitalCrownRotation()` 在 `watchOS` 上读取 `Digital Crown`？](example/cross-platform/demo4/README.md) ## 数据 通过 `Core Data` 集成和更多功能处理数据 - [在 `SwiftUI` 中使用 `Core Data` 的简介](example/data/demo1/README.md) - [如何配置核心数据以与 `SwiftUI` 一起使用？](example/data/demo2/README.md) - [如何从 `SwiftUI` 视图访问 `Core Data` 管理的对象上下文？](example/data/demo3/README.md) - [如何使用 `@FetchRequest` 创建核心数据获取请求？](example/data/demo4/README.md) - [如何使用 `predicate` 过滤核心数据获取请求？](example/data/demo5/README.md) - [如何从 `SwiftUI` 视图添加 `Core Data` 对象？](example/data/demo6/README.md) - [如何从 `SwiftUI` 视图中删除 `Core Data` 对象？](example/data/demo7/README.md) - [如何限制获取请求中的项目数？](example/data/demo8/README.md) - [如何使用 `FileDocument` 和 `DocumentGroup` 创建基于文档的应用程序？](example/data/demo9/README.md) - [如何使用 `fileExporter()` 导出文件？](example/data/demo10/README.md) - [如何在 `SwiftUI` 中继续 `NSUserActivity`？](example/data/demo11/README.md) - [如何使用 `LocationButton` 读取用户的位置？](example/data/demo12/README.md) ## 辅助功能 如何使每个人都能使用您的应用 - [SwiftUI 的可访问性简介](example/accessibility/demo1/README.md) - [如何使用带有自定义字体的动态类型？](example/accessibility/demo2/README.md) - [如何检测“减少运动”辅助功能设置？](example/accessibility/demo3/README.md) - [如何检测暗模式？](example/accessibility/demo4/README.md) - [如何使用装饰性图像减少屏幕阅读器的混乱？](example/accessibility/demo5/README.md) - [如何在请求时减少动画？](example/accessibility/demo6/README.md) ## 工具 使用Xcode的帮助构建更好的应用程序 - [如何以不同的动态类型大小预览布局？](example/tooling/demo1/README.md) - [如何在亮(light)和黑暗(dark)模式下预览布局？](example/tooling/demo2/README.md) - [如何在不同的设备中预览布局？](example/tooling/demo3/README.md) - [如何在导航视图中预览布局?](example/tooling/demo4/README.md) - [如何使用 `Instruments` 来配置您的 SwiftUI 代码并识 `identify` 布局？](example/tooling/demo5/README.md) - [如何在 `SwiftUI` 中使用 `Touch ID` 和 `Face ID`？](example/tooling/demo6/README.md) - [如何在 Xcode 中添加创建 `Swift` 包依赖？](example/tooling/demo7/README.md) - [如何以纵向或横向预览布局？](example/tooling/demo8/README.md) - [如何查找导致 SwiftUI 视图更新的数据更改？](example/tooling/demo9/README.md) ## 附录A 如何使用每个 SwiftUI 属性包装器 - [了解 Swift 和 SwiftUI 中的属性包装器](example/appendix-a/demo1/README.md) - [所有 SwiftUI 属性包装器都进行了解释和比较](example/appendix-a/demo2/README.md) - [什么是 `@State` 属性包装器？](example/appendix-a/demo3/README.md) - [什么是 `@StateObject` 属性包装器？](example/appendix-a/demo4/README.md) - [什么是 `@Published` 属性包装器？](example/appendix-a/demo5/README.md) - [什么是 `@ObservedObject` 属性包装器？](example/appendix-a/demo6/README.md) - [什么是 `@EnvironmentObject` 属性包装器？](example/appendix-a/demo7/README.md) - [什么是 `@Environment` 属性包装器？](example/appendix-a/demo8/README.md) - [什么是 `@Binding` 属性包装器？](example/appendix-a/demo9/README.md) - [什么是 `@GestureState` 属性包装器？](example/appendix-a/demo10/README.md) - [什么是 `@FetchRequest` 属性包装器？](example/appendix-a/demo11/README.md) - [什么是 `@AppStorage` 属性包装器？](example/appendix-a/demo12/README.md) - [什么是 `@SceneStorage` 属性包装器？](example/appendix-a/demo13/README.md) - [什么是 `@ScaledMetric` 属性包装器？](example/appendix-a/demo14/README.md) - [什么是 `@UIApplicationDelegateAdaptor` 属性包装器？](example/appendix-a/demo15/README.md) ## 工具推荐 - [Swift 语法入门](https://github.com/jaywcjlove/swift-tutorial) - [Swift 包索引](https://swiftpackageindex.com/) - [hackingwithswift.com](https://www.hackingwithswift.com/quick-start/swiftui) ## 贡献者 一如既往，感谢我们出色的贡献者！ 使用 [action-contributors](https://github.com/jaywcjlove/github-action-contributors) 制作。 ## License Licensed under the MIT License. ================================================ FILE: example/accessibility/demo1/README.md ================================================ SwiftUI 的可访问性简介 === 默认情况下，SwiftUI 应用程序具有极高的可访问性，这绝非偶然-它是从最早计划到框架中的，除非您积极选择使用默认值，否则您会发现自己的应用程序可以很好地完成无需您进行额外的工作就可以访问。 这种行为的关键是 SwiftUI 布局的基于堆栈的方法：一切都有自然的顺序，因为我们将事物放置在 `HStack` 和 `VStack` 中，因此系统可以大致了解布局应该如何流动。相比之下，`UIKit` 和“自动布局”使我们可以将物品放置在任何地方，因此系统必须有效地猜测应该如何订购物品。 SwiftUI 还强烈建议我们在所有交互式控件中添加标签，明确说明所有内容。是的，我们可以隐藏这些标签，但是即使隐藏了这些标签，系统仍会将它们用作屏幕阅读器等的音频提示。 因此，SwiftUI 为我们免费提供了许多可访问性。但是，它仍然为我们提供了额外的工具来提供更好的体验：屏幕阅读器应如何阅读内容？是否需要阅读所有内容？如果用户不喜欢没有奇特的动画怎么办？ 在本章集合中，我们将介绍这些更高级的功能，希望可以帮助您构建用户界面，无论用户的系统偏好如何，这些界面都可以为用户带来舒适的体验。 ================================================ FILE: example/accessibility/demo2/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DEA7CB72609B65C00EA5E6F /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DEA7CA42609B65B00EA5E6F /* 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"author" : "xcode", "version" : 1 } } ================================================ FILE: example/accessibility/demo2/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI //@available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *) //struct ScaledFont: ViewModifier { // @Environment(\.sizeCategory) var sizeCategory // var name: String // var size: CGFloat // // func body(content: Content) -> some View { // let scaledSize = UIFontMetrics.default.scaledValue(for: size) // return content.font(.custom(name, size: scaledSize)) // } //} //@available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *) //extension View { // func scaledFont(name: String, size: CGFloat) -> some View { // return self.modifier(ScaledFont(name: name, size: size)) // } //} @available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *) extension View { func scaledFont(name: String, size: CGFloat) -> some View { return self.modifier(ScaledFont(name: name, size: size)) } } struct ScaledFont: ViewModifier { @Environment(\.sizeCategory) var sizeCategory var name: String var size: CGFloat func body(content: Content) -> some View { let scaledSize = UIFontMetrics.default.scaledValue(for: size) return content.font(.custom(name, size: scaledSize)) } } struct ContentView: View { var body: some View { Text("Hello World") Text("Hello World") .scaledFont(name: "Georgia", size: 12) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/accessibility/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/accessibility/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/accessibility/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/accessibility/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/accessibility/demo2/README.md ================================================ 如何使用带有自定义字体的动态类型？ === 如果您使用的是 `iOS 14` 或更高版本，则无需进一步处理，您的自定义字体就会自动缩放。 但是，如果您希望字体相对于特定的 `Dynamic Type` 字体缩放，则应使用 `relativeTo` 参数，如下所示： ```swift Text("Scaling") .font(.custom("Georgia", size: 24, relativeTo: .headline)) ``` 这将以 `24pt` 开始字体，但是它将相对于`Headline Dynamic Type`字体放大和缩小。 如果您需要定位 `iOS 13`，请继续阅读以下内容… SwiftUI 支持所有 `Dynamic Type` 的字体大小，所有字体大小都使用 `.font()` 修饰符进行设置。 但是，如果您要求特定的字体和大小，则会发现文本不再根据用户的 `Dynamic Type` 设置自动缩放，而是保持固定。 要解决此问题，我们需要创建一个自定义 `ViewModifier`，它可以根据当前的辅助功能设置来缩放字体大小，并检测该设置何时更改。 我将首先为您提供代码，然后逐步介绍它的工作方式以及原因： ```swift @available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *) struct ScaledFont: ViewModifier { @Environment(\.sizeCategory) var sizeCategory var name: String var size: CGFloat func body(content: Content) -> some View { let scaledSize = UIFontMetrics.default.scaledValue(for: size) return content.font(.custom(name, size: scaledSize)) } } @available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *) extension View { func scaledFont(name: String, size: CGFloat) -> some View { return self.modifier(ScaledFont(name: name, size: size)) } } ``` 这就是获取与动态类型一起使用的自定义字体所需的全部代码。 作为使用它的示例，下面是一个带有两个文本视图的列表，一个使用内置字体，另一个使用可缩放的佐治亚州字体： ```swift struct ContentView: View { var body: some View { List { Text("Hello World") Text("Hello World") .scaledFont(name: "Georgia", size: 12) } } } ``` 现在您已经了解了它的工作原理，让我们看一下它的工作原理。 首先，我们有以下自定义视图修饰符： ```swift struct ScaledFont: ViewModifier { @Environment(\.sizeCategory) var sizeCategory var name: String var size: CGFloat func body(content: Content) -> some View { let scaledSize = UIFontMetrics.default.scaledValue(for: size) return content.font(.custom(name, size: scaledSize)) } } ``` 这将接受我们字体的名称和大小，然后使用 `UIFontMetrics` 将请求的字体放大到与用户当前设备设置匹配的字体，然后将其发送回去。 然后，将其包装在View的扩展中，以使其更易于使用： ```swift @available(iOS 13, macCatalyst 13, tvOS 13, watchOS 6, *) extension View { func scaledFont(name: String, size: CGFloat) -> some View { return self.modifier(ScaledFont(name: name, size: size)) } } ``` 所有的工作就是包装对自定义字体修饰符的调用，以使它在我们的视图中看起来更好–这意味着我们编写使用 `.scaledFont(name: "Georgia", size: 12)` 而不是 `.modifier(ScaledFont(name: "Georgia", size: 12))`。 现在，您可能想知道如果我们要做的只是传递数据，为什么我们需要自定义视图修饰符。 好吧，线索就在我们的视图修饰符的这一行中： ```swift @Environment(\.sizeCategory) var sizeCategory ``` 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import SwiftUI struct ContentView: View { @Environment(\.accessibilityReduceMotion) var reduceMotion @State private var scale: CGFloat = 1 var body: some View { VStack { Spacer() Circle() .frame(width: 20, height: 20) .scaleEffect(scale) .animation(reduceMotion ? nil : .spring(response: 1, dampingFraction: 0.1)) Spacer() Button("Increase Scale") { scale *= 1.5 } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/accessibility/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/accessibility/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/accessibility/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/accessibility/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/accessibility/demo3/README.md ================================================ 如何检测“减少运动”辅助功能设置？ === 许多用户对动画敏感，尤其是那些大型或复杂的动画。 因此，iOS具有名为“减少运动”(Reduce Motion)的内置可访问性设置，应用可以根据需要对其进行读取和响应。 在 SwiftUI 中，此设置作为环境布尔值公开给我们，因此您应该首先在视图中添加一个属性： ```swift @Environment(\.accessibilityReduceMotion) var reduceMotion ``` 现在由您决定 “reduce motion” 的含义 – 是删除动画，还是只是将动画更改为强度较小？ 您是否应该保留一些重要的动画，而只删除那些具有视觉吸引力的动画？ 例如，如果您想为大多数用户提供弹性的弹簧动画，但对于希望减少运动的用户则根本不需要动画，则可以使用如下所示的动画修改器： ```swift .animation(reduceMotion ? nil : .spring(response: 1, dampingFraction: 0.1)) ``` 这是一个完整的示例，您可以尝试： ```swift struct ContentView: View { @Environment(\.accessibilityReduceMotion) var reduceMotion @State private var scale: CGFloat = 1 var body: some View { VStack { Spacer() Circle() .frame(width: 20, height: 20) .scaleEffect(scale) .animation(reduceMotion ? nil : .spring(response: 1, dampingFraction: 0.1)) Spacer() Button("Increase Scale") { scale *= 1.5 } } } } ``` 这将创建一个小矩形，每次按下该按钮时，将使用弹簧动画将其放大。 但是，如果用户启用了减少运动，则动画将被完全删除 – 它对 `animation()` 修饰符使用 `nil`。 ================================================ FILE: example/accessibility/demo4/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DEA7D092609B98D00EA5E6F /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 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"author" : "xcode", "version" : 1 } } ================================================ FILE: example/accessibility/demo4/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI struct ContentView: View { @Environment(\.colorScheme) var colorScheme var body: some View { Text(colorScheme == .dark ? 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================================================ FILE: example/accessibility/demo5/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI struct ContentView: View { var body: some View { Image(decorative: "star") } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/accessibility/demo5/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/accessibility/demo5/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/accessibility/demo5/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/accessibility/demo5/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/accessibility/demo5/README.md ================================================ 如何使用装饰性图像减少屏幕阅读器的混乱？ === SwiftUI 会自动使用图像名称作为屏幕阅读器标签，如果您使用的图像名称为 “Paul Hudson的照片” 或 “带有Swift徽标的图片”，这将很有用。 但是，某些图像并非仅仅是为了装饰而已被阅读 - 它们不会传达屏幕上其他地方还没有的信息，或者只是传达信息，以使用户界面看起来更具吸引力。 如果您使用 `Image("star")` 之类的图片创建这些图像，则屏幕阅读器会将其作为标准UI传递的一部分读出。一个更好的主意是使用 `Image(decorative:)` 初始化程序创建它们，该初始化程序告诉 SwiftUI 该图像不应暴露于屏幕阅读器： ```swift Image(decorative: "star") ``` 建立用户界面后，值得使用 `VoiceOver` 进行最后检查，以确保您正确标记了图像 - 最后，您需要的是屏幕阅读器说出您认为仅在代码中使用过的奇怪的内部文件名 ！ ================================================ FILE: example/accessibility/demo6/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DEA7D5B2609BBAD00EA5E6F /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DEA7D482609BBAC00EA5E6F /* DemoApp.swift */; }; 7DEA7D5C2609BBAD00EA5E6F /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DEA7D482609BBAC00EA5E6F /* DemoApp.swift */; }; 7DEA7D5D2609BBAD00EA5E6F /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DEA7D492609BBAC00EA5E6F /* ContentView.swift */; }; 7DEA7D5E2609BBAD00EA5E6F /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DEA7D492609BBAC00EA5E6F /* ContentView.swift */; }; 7DEA7D5F2609BBAD00EA5E6F /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; 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withOptionalAnimation(_ animation: Animation? = .default, _ body: () throws -> Result) rethrows -> Result { if UIAccessibility.isReduceMotionEnabled { return try body() } else { return try withAnimation(animation, body) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/accessibility/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/accessibility/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/accessibility/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/accessibility/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/accessibility/demo6/README.md ================================================ 如何在请求时减少动画？ === SwiftUI 的 `withAnimation()` 函数可让我们轻松地在视图上执行自定义动画，但它不遵守 “Reduce Motion” 可访问性设置，因此可能会使您的应用难以为许多人使用。 如果您还想使用 `withAnimation()` 并同时遵守该设置，建议您添加一个像这样的全局函数： ```swift func withOptionalAnimation(_ animation: Animation? = .default, _ body: () throws -> Result) rethrows -> Result { if UIAccessibility.isReduceMotionEnabled { return try body() } else { return try withAnimation(animation, body) } } ``` 该功能会自动检查每次触发动画时是否启用了“降低运动”功能，并针对专门请求较少动画的用户将其禁用。 如果您想知道，`withAnimation()` 也是一个全局函数–该函数位于任何其他类型的外部–因此，新的 `withOptionalAnimation（）`函数的行为将相同。 因此，您可以在与 `withAnimation()` 一起使用的任何地方使用它，如下所示： ```swift struct ContentView: View { @State private var scale: CGFloat = 1 var body: some View { Text("Hello, World!") .scaleEffect(scale) .onTapGesture { withOptionalAnimation { scale *= 1.5 } } } } ``` ================================================ FILE: example/advanced-state/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo1/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo1/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var tapCount = 0 var body: some View { Button("Tap count: \(tapCount)") { tapCount += 1 } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/advanced-state/demo1/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/advanced-state/demo1/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/advanced-state/demo1/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier 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FILE: example/advanced-state/demo1/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/advanced-state/demo1/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/advanced-state/demo1/README.md ================================================ `@ObservedObject`，`@State` 和 `@EnvironmentObject` 有什么区别？ === 在任何现代应用中，状态都是不可避免的，但是使用 `SwiftUI` 时要记住，我们所有的视图只是其状态的简单功能-我们不直接更改视图，而是操纵状态并由其决定结果。 ![](imgs/1.jpg) `SwiftUI` 为我们提供了几种在应用程序中存储状态的方法，但是它们有些微的不同，因此，重要的是要了解它们的不同之处，以便正确使用框架。 使用状态的最简单方法是 `@State` 属性包装器，其用法如下： ```swift struct ContentView: View { @State private var tapCount = 0 var body: some View { Button("Tap count: \(tapCount)") { tapCount += 1 } .padding(100) } } ``` 这会在视图内部创建一个属性，但是它使用 `@State` 属性包装器来请求 `SwiftUI` 管理内存。 这很重要：我们所有的视图都是结构，这意味着它们无法更改，如果我们甚至无法在应用程序中修改整数，那么我们将无能为力。 因此，当我们说 `@State` 做一个属性时，我们将其控制权交给 `SwiftUI`，以便只要视图存在，它就在内存中保持持久。 当状态发生变化时，`SwiftUI` 会自动将视图的最新更改重新加载到视图中，以便它可以反映其新信息。 `@State` 对于属于特定视图且永远不会在该视图之外使用的简单属性非常有用，因此，将这些属性标记为私有很重要，以加强这种状态是专门为当前视图视图使用的而设计的。 ## 什么是 `@ObservedObject` ？ 对于更复杂的属性；当您要使用的自定义类型可能具有多个属性和方法，或者可能在多个视图之间共享时，通常会使用 `@ObservedObject`。 这与 `@State` 非常相似，不同之处在于，我们现在使用的是外部引用类型，而不是简单的本地属性（例如 `String` 或 `Integer`）。您仍然说的是，视图依赖于会发生变化的数据，但现在您负责管理自己的数据除外-您需要创建该类的实例，创建其自己的属性，等等。 与 `@ObservedObject` 一起使用的任何类型都应符合 `ObservableObject` 协议。在将属性添加到可观察对象时，您可以决定是否对每个属性进行更改都应强制正在刷新正在监视对象的视图。您通常会这样做，但这不是必需的。 观察对象可以通过多种方式通知视图重要数据已更改，但是最简单的方法是使用 `@Published` 属性包装器。如果需要更多控制，也可以从 `Combine` 框架使用自定义发布者，但是实际上这很少见。如果可观察对象使用其数据碰巧有多个视图，则任一选项都会自动通知所有对象。 警告：当您使用自定义发布者宣布您的对象已更改时，这必须在主线程上发生。 ## 什么是 `@StateObject`? `@State` 和 `@ObservedObject` 之间的某个位置是 `@StateObject`。 这是 `@ObservedObject` 的专用版本，其工作方式几乎完全相同：您必须遵守 `ObservableObject` 协议，可以使用 `@Published` 将属性标记为引起更改通知，并且当对象改变时，所有监视 `@StateObject` 的视图都将刷新。 `@StateObject` 和 `@ObservedObject` 之间有一个重要的区别，那就是所有权 – 哪个视图创建了该对象，以及哪个视图仅在监视它。 规则是这样的：无论哪个视图是第一个创建对象的视图，都必须使用 `@StateObject` 来告诉 `SwiftUI` 它是数据的所有者，并负责保持其活动状态。 所有其他视图必须使用 `@ObservedObject`，以告诉 `SwiftUI` 他们想监视对象的更改，但不直接拥有它。 ## 什么是 `@EnvironmentObject`? 您已经了解了 `@State` 如何为类型声明简单属性，该类型在更改时会自动刷新视图，以及 `@ObservedObject` 如何为外部类型声明属性，当更改时可能会或不会导致视图刷新。这两个都必须由您的视图设置，但是 `@ObservedObject` 可能与其他视图共享。 还有另一种可以使用的属性包装器，即 `@EnvironmentObject`。这个值可通过应用程序本身提供给视图，它是每个视图都可以读取的共享数据。因此，如果您的应用程序具有一些重要的模型数据，所有视图都需要读取这些数据，则可以将其从一个视图到另一个视图，或者只是将其置于每个视图都可以即时访问它的环境中。 当需要在应用程序中传递大量数据时，`@EnvironmentObject` 可以为您带来极大的便利。由于所有视图都指向同一模型，因此，如果一个视图更改了模型，则所有视图都将立即更新-这样就不会冒着使应用程序的不同部分不同步的风险。 ## 总结差异 初始化 `ObservableObject` 时，应使用 `@StateObject` 而不是 `@ObservedObject`。 您的视图可以接收其他视图拥有的对象，例如 `@ObservedObject`或`@EnvironmentObject`，但是数据的所有者应始终使用 `@StateObject` 创建数据对象。 - 将 `@State` 用于属于单个视图的简单属性。 通常应将其标记为私有。 - 将 `@ObservedObject` 用于可能属于多个视图的复杂属性。 大多数情况下，您应该使用引用类型 `@ObservedObject` 。 - 对于您使用的每个可观察对象，请使用 `@StateObject` 一次，无论代码的哪个部分负责创建它。 - 将 `@EnvironmentObject` 用于在应用程序其他位置创建的属性，例如共享数据。 在这四个中，如果不确定从哪个位置开始使用。您会发现 `@ObservedObject` 既最有用，也是最常用的。 ================================================ FILE: example/advanced-state/demo2/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo2/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo2/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo2/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI class Player: ObservableObject { @Published var name = "Taylor" @Published var age = 26 } struct ContentView: View { @StateObject var player = Player() var body: some View { NavigationView { NavigationLink(destination: PlayerNameView(player: player)) { Text("Show detail view") } 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================================================ FILE: example/advanced-state/demo2/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/advanced-state/demo2/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/advanced-state/demo2/README.md ================================================ 如何使用 `@StateObject` 创建和监视外部对象？ === `SwiftUI` 的 `@StateObject` 属性包装器是 `@ObservedObject` 的一种特殊形式，具有所有相同的功能，但还有一个重要的附加功能：它应该用于创建观察到的对象，而不仅仅是存储从外部传入的对象。 当您使用 `@StateObject` 向视图添加属性时，`SwiftUI` 认为该视图是可观察对象的所有者。 传递该对象的所有其他视图应使用 `@ObservedObject`。 这真的很重要。 严重的是，如果您弄错了，您的对象可能会被意外破坏，这将导致您的应用看似随机崩溃。 因此，要明确一点：您应该使用 `@StateObject` 在某个位置创建可观察对象，并且在传递该对象的所有后续位置中，都应该使用 `@ObservedObject`。 这是代码示例： ```swift class Player: ObservableObject { @Published var name = "Taylor" @Published var age = 26 } struct ContentView: View { @StateObject var player = Player() var body: some View { NavigationView { NavigationLink(destination: PlayerNameView(player: player)) { Text("Show detail view") } } } } struct PlayerNameView: View { @ObservedObject var player: Player var body: some View { Text("Hello, \(player.name)!") } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ``` 如果您很难记住区别，请尝试以下操作：每当在属性包装程序中看到 `State` 时，例如 `@State`，`@StateObject`，`@GestureState`，表示“当前视图拥有此数据”。 ================================================ FILE: example/advanced-state/demo3/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo3/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo3/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo3/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI class UserProgress: ObservableObject { @Published var score = 0 } struct InnerView: View { @ObservedObject var progress: UserProgress var body: some View { Button("Increase Score") { progress.score += 1 } } } struct ContentView: View { @StateObject var progress = UserProgress() var body: some View { VStack { Text("Your score is \(progress.score)") InnerView(progress: progress) } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/advanced-state/demo3/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only 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================================================ FILE: example/advanced-state/demo3/README.md ================================================ 如何使用 `@ObservedObject` 管理外部对象的状态？ === 使用观察对象时，我们需要处理三个关键事项：`ObservableObject` 协议与某种可以存储数据的类一起使用，`@ObservedObject` 属性包装器用于在视图内部存储可观察对象的实例，以及 `@Published` 的属性包装器将添加到观察对象内部的任何属性，这些属性应导致视图在更改时进行更新。 提示：仅将 `@ObservedObject` 用于从其他位置传入的视图，这一点非常重要。 您不应使用此属性包装器来创建可观察对象的初始实例，这就是 `@StateObject` 的目的。 举例来说，这是一个符合 `ObservableObject` 的 `UserProgress` 类： ```swift class UserProgress: ObservableObject { @Published var score = 0 } ``` 我知道代码看起来不多，但这是因为 `SwiftUI` 代表我们做了很多工作！ 里面有两件事很重要： - `ObservableObject`一致性允许在视图内部使用此类的实例，以便在发生重要更改时重新加载视图。 - `@Published` 属性包装器告诉 `SwiftUI` 得分的更改应触发视图重新加载。 我们可以将 `UserProgress` 类与以下代码一起使用： ```swift class UserProgress: ObservableObject { @Published var score = 0 } struct InnerView: View { @ObservedObject var progress: UserProgress var body: some View { Button("Increase Score") { progress.score += 1 } } } struct ContentView: View { @StateObject var progress = UserProgress() var body: some View { VStack { Text("Your score is \(progress.score)") InnerView(progress: progress) } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ``` 如您所见，除了使用 `@ObservedObject` 属性包装器进行进度处理外，其他所有内容或多或少看起来都是相同的– `SwiftUI` 为我们处理了所有实现细节。 不过，有一个重要的区别：`progress` 属性未声明为私有。 这是因为绑定的对象可以被多个视图使用，因此通常将其公开共享。 请记住，请不要使用 `@ObservedObject` 创建对象的实例。 如果您要这样做，请改用 `@StateObject`。 ================================================ FILE: example/advanced-state/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo4/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo4/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo4/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI // 我们的可观察对象类 class GameSettings: ObservableObject { @Published var score = 0 } // 期望找到 GameSettings 对象的视图 // 在环境中，并显示其得分。 struct ScoreView: View { @EnvironmentObject var settings: GameSettings var body: some View { Text("Score: \(settings.score)") } } struct ContentView: View { @StateObject var settings = GameSettings() var body: some View { NavigationView { VStack { // 写入 environment settings 的按钮 Button("Increase Score") { settings.score += 1 } NavigationLink(destination: ScoreView()) { Text("Show Detail View") } } .frame(height: 200) } .environmentObject(settings) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/advanced-state/demo4/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/advanced-state/demo4/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/advanced-state/demo4/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/advanced-state/demo4/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json 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================================================ FILE: example/advanced-state/demo4/README.md ================================================ 如何使用 `@EnvironmentObject` 在视图之间共享数据？ === 对于应与应用程序中的许多视图共享的数据，`SwiftUI` 为我们提供了 `@EnvironmentObject` 属性包装器。 这样一来，我们就可以在需要的任何地方共享模型数据，同时还可以确保在数据更改时我们的视图自动保持更新。 将 `@EnvironmentObject` 视为在许多视图上使用 `@ObservedObject` 的更智能，更简单的方法。 与其在视图 `A` 中创建一些数据，然后将其传递到视图 `B`，视图 `C`，然后在最终使用它之前将其传递给视图 `D`，您可以在视图中创建它并将其放入环境中，以便视图`B`，`C` 和 `D`将 自动访问它。 就像 `@ObservedObject` 一样，您永远不会将值分配给 `@EnvironmentObject` 属性。 相反，它应该从其他地方传入，最终您可能会想使用 `@StateObject` 在某个地方创建它。 但是，与 `@ObservedObject` 不同，我们不会手动将对象传递到其他视图中。 取而代之的是，我们将数据发送到一个名为 `environmentObject()` 的修饰符中，该修饰符使该对象及其视图中的其他视图在 `SwiftUI` 的环境中可用。 注意：环境对象必须由祖先视图提供-如果 `SwiftUI` 找不到正确类型的环境对象，则会崩溃。 这也适用于预览，因此请小心。 为了演示环境对象，我们将定义三件事： - 一个 `GameSettings` 类，包含一个发布的单个属性，称为 `score`。 - 期望在环境中接收 `GameSettings` 对象的 `ScoreView` 视图，并显示其 `score` 属性。 - 创建一个 `GameSettings` 对象的 `ContentView` 视图，具有一个将其得分属性加1的按钮，以及一个用于显示详细信息视图的 `NavigationLink`。 这是代码： ```swift // 我们的可观察对象类 class GameSettings: ObservableObject { @Published var score = 0 } // 期望找到 GameSettings 对象的视图 // 在环境中，并显示其得分。 struct ScoreView: View { @EnvironmentObject var settings: GameSettings var body: some View { Text("Score: \(settings.score)") } } struct ContentView: View { @StateObject var settings = GameSettings() var body: some View { NavigationView { VStack { // 写入 environment settings 的按钮 Button("Increase Score") { settings.score += 1 } NavigationLink(destination: ScoreView()) { Text("Show Detail View") } } .frame(height: 200) } .environmentObject(settings) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ``` 我想在该代码中挑选出几个重要的部分： - 就像 `@StateObject` 和 `@ObservedObject` 一样，与 `@EnvironmentObject` 一起使用的所有类都必须符合 `ObservableObject` 协议。 - 我们将 `GameSettings` 放入导航视图的环境中，这意味着导航视图内的所有视图都可以读取该对象（如果需要）以及该导航视图显示的任何视图。 - 使用 `@EnvironmentObject` 属性包装器时，您声明了您希望接收的东西的类型，但是您没有创建它-毕竟您希望从环境中接收它。 - 因为我们的详细信息视图显示在导航视图内部，所以它可以访问相同的环境，这又意味着它可以读取我们创建的 `GameSettings` 对象。 - 我们不需要将环境中的 `GameSettings` 实例与 `ScoreView` 中的 `settings` 属性显式关联- `SwiftUI` 会自动发现它在环境中具有 `GameSettings` 实例，因此就是它所使用的实例。 警告：既然我们的视图依赖于当前的环境对象，那么还必须更新预览代码以提供一些示例设置供您使用，这一点很重要。 例如，为预览使用诸如 `ScoreView().environmentObject(GameSettings())` 之类的东西就可以做到。 如果需要向环境中添加多个对象，则应添加多个 `environmentObject()` 修饰符–只需一个接一个地调用它们即可。 ================================================ FILE: example/advanced-state/demo5/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo5/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo5/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo5/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI // 创建一个可观察的对象类，它宣布 // 更改为其唯一属性 class UserAuthentication: ObservableObject { var username = "Taylor" { willSet { objectWillChange.send() } } } struct ContentView: View { @StateObject var user = UserAuthentication() var body: some View { VStack(alignment: .leading) { TextField("Enter your name", text: $user.username) Text("Your username is: \(user.username)") } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/advanced-state/demo5/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/advanced-state/demo5/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } 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```swift // 创建一个可观察的对象类，它宣布 // 更改为其唯一属性 class UserAuthentication: ObservableObject { var username = "Taylor" { willSet { objectWillChange.send() } } } struct ContentView: View { @StateObject var user = UserAuthentication() var body: some View { VStack(alignment: .leading) { TextField("Enter your name", text: $user.username) Text("Your username is: \(user.username)") } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ``` 请注意，我们如何将 `willSet` 属性观察器附加到 `UserAuthentication` 的 `username` 属性上，从而使我们可以在该值更改时运行代码。 在示例代码中，每当用户名更改时，我们都调用 `objectWillChange.send()`，这告诉 `ObjectWillChange` 发布者发布有关我们的数据已更改的消息，以便任何订阅的视图都可以刷新。 提示：该示例与在属性上使用 `@Published` 没什么不同，但是现在我们有了对 `objectWillChange.send()` 的自定义调用，我们可以添加额外的功能–例如，可以将值保存到磁盘。 ================================================ FILE: example/advanced-state/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo6/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo6/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Toggle(isOn: .constant(true)) { Text("Show advanced options") } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/advanced-state/demo6/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/advanced-state/demo6/Demo/Demo/DemoApp.swift 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================================================ 如何创建常量绑定？ === 当您在制作一些UI原型时，或者只需要传递一个值以使 SwiftUI 预览有意义地显示时，您会发现使用常量绑定会有所帮助：不变的硬编码值，但是可以 仍然像常规绑定一样使用，因此您的代码可以正常工作。 例如，如果要创建切换开关，通常必须创建一个 `@State` 属性来存储布尔值，然后在创建它时将其发送到切换开关中。 但是，如果您只是在设计用户界面的原型，则可以改用常量绑定，如下所示： ```swift Toggle(isOn: .constant(true)) { Text("Show advanced options") } ``` 该开关是只读的，并且始终处于打开状态，因为这就是我们不变的绑定所说的内容，但是现在足以让您动起来了–您可以稍后再将其替换为完整的 `@State` 属性。 这些常量绑定有各种类型：布尔值，字符串，整数等都可用，并且 `Swift` 会确保为每种视图类型使用正确的绑定。 ================================================ FILE: example/advanced-state/demo7/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo7/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo7/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo7/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var firstToggle = false @State private var secondToggle = false var body: some View { let firstBinding = Binding( get: { self.firstToggle }, set: { self.firstToggle = $0 if $0 == true { self.secondToggle = false } } ) let secondBinding = Binding( get: { self.secondToggle }, set: { self.secondToggle = $0 if $0 == true { self.firstToggle = false } } ) return VStack { Toggle(isOn: firstBinding) { Text("First toggle") } Toggle(isOn: secondBinding) { Text("Second toggle") } } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/advanced-state/demo7/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: 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================================================ 如何创建自定义绑定? === 当我们使用 `SwiftUI` 的 `@State` 属性包装器时，它代表我们进行了大量工作，以允许用户界面控件进行双向绑定。 但是，我们也可以使用 `Binding` 类型手动创建绑定，该类型可以与自定义 `get` 和 `set` 闭包一起提供，以在读取或写入值时运行。 例如，这将创建一个琐碎的绑定，该绑定仅充当另一个属性的传递： ```swift struct ContentView: View { @State private var username = "" var body: some View { let binding = Binding( get: { self.username }, set: { self.username = $0 } ) return VStack { TextField("Enter your name", text: binding) } } } ``` 提示：绑定到自定义 `Binding` 实例时，无需在绑定名称前使用美元符号-您已经在阅读双向绑定。 当您想为正在读取或写入的绑定添加额外的逻辑时，自定义绑定非常有用–您可能需要在返回值之前执行一些计算，或者在更改值时希望执行一些额外的操作。 例如，我们可以创建一个由两个拨动开关组成的堆栈，两个拨动开关都可以关闭，而一个可以打开，但是两个不能同时打开–启用一个将始终禁用另一个。 这就是代码中的样子： ```swift struct ContentView: View { @State private var firstToggle = false @State private var secondToggle = false var body: some View { let firstBinding = Binding( get: { self.firstToggle }, set: { self.firstToggle = $0 if $0 == true { self.secondToggle = false } } ) let secondBinding = Binding( get: { self.secondToggle }, set: { self.secondToggle = $0 if $0 == true { self.firstToggle = false } } ) return VStack { Toggle(isOn: firstBinding) { Text("First toggle") } Toggle(isOn: secondBinding) { Text("Second toggle") } } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ``` ================================================ FILE: example/advanced-state/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/advanced-state/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", 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XCConfigurationList section */ }; rootObject = 7D3649B225FFE7C800C13C01 /* Project object */; } ================================================ FILE: example/advanced-state/demo8/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/advanced-state/demo8/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/advanced-state/demo8/README.md ================================================ 如何在 SwiftUI 中使用计时器？ === 如果要定期运行某些代码（例如制作倒数计时器或类似的计时器），则应使用 `Timer` 和 `onReceive()` 修饰符。 例如，此代码创建一个计时器发布程序，该计时器每秒触发一次，并使用当前时间更新标签： ```swift struct ContentView: View { @State var currentDate = Date() let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect() var body: some View { Text("\(currentDate)") .onReceive(timer) { input in currentDate = input } } } ``` 将 `.main` 用作 `runloop` 选项非常重要，因为我们的计时器会更新用户界面。 至于 `.common` 模式，它允许计时器与其他常见事件一起运行-例如，如果文本在滚动的滚动视图中。 如您所见，`onReceive()` 闭包在包含当前日期的某些输入中传递。 在上面的代码中，我们直接将其分配给 `currentDate`，但是您可以使用它来计算自上一个日期以来经过了多少时间。 如果您特别想创建一个倒数计时器或秒表，则应创建某种状态来跟踪剩余时间，然后在计时器启动时从中减去。 例如，我们可以创建一个倒数计时器，以显示标签中剩余的时间，如下所示： ```swift struct ContentView: View { @State var timeRemaining = 10 let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect() var body: some View { Text("\(timeRemaining)") .onReceive(timer) { _ in if timeRemaining > 0 { timeRemaining -= 1 } } .padding(100) .frame(width: 300) } } ``` ================================================ FILE: example/advanced-state/demo9/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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================================================ FILE: example/advanced-state/demo9/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI extension Binding { func onChange(_ handler: @escaping (Value) -> Void) -> Binding { Binding( get: { self.wrappedValue }, set: { newValue in self.wrappedValue = newValue handler(newValue) } ) } } struct ContentView: View { @State private var name = "" var body: some View { TextField("Enter your name:", text: $name.onChange(nameChanged)) .textFieldStyle(RoundedBorderTextFieldStyle()) .padding(100) } func nameChanged(to value: String) { print("Name changed to \(name)!") } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/advanced-state/demo9/Demo/Demo/Demo.entitlements ================================================ 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================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/advanced-state/demo9/README.md ================================================ 当使用 `onChange()` 改变状态时如何运行一些代码？ === SwiftUI 允许我们将 `onChange()` 修饰符附加到任何视图，当程序中的某些状态发生更改时，该修饰符将运行我们选择的代码。 这很重要，因为我们不能总是将诸如 `didSet` 之类的属性观察器与 `@State` 之类一起使用。 例如，这将在键入名称时打印名称更改： ```swift struct ContentView: View { @State private var name = "" var body: some View { TextField("Enter your name:", text: $name) .textFieldStyle(RoundedBorderTextFieldStyle()) .onChange(of: name) { newValue in print("Name changed to \(name)!") } } } ``` 就个人而言，我更喜欢为 `Binding` 添加一个自定义扩展，以便将观察代码直接附加到绑定而不是视图上–它使我可以将观察者放置在它所观察的对象旁边，而不是附加许多 `onChange()` 修饰符 我认为其他地方。 因此，我将使用如下代码： ```swift extension Binding { func onChange(_ handler: @escaping (Value) -> Void) -> Binding { Binding( get: { self.wrappedValue }, set: { newValue in self.wrappedValue = newValue handler(newValue) } ) } } struct ContentView: View { @State private var name = "" var body: some View { TextField("Enter your name:", text: $name.onChange(nameChanged)) .textFieldStyle(RoundedBorderTextFieldStyle()) } func nameChanged(to value: String) { print("Name changed to \(name)!") } } ``` ================================================ FILE: example/alerts-and-menus/demo1/README.md ================================================ 使用简介 === SwiftUI 的声明式编程方法意味着我们不会像在 `UIKit` 中那样创建和呈现警报和操作表。相反，我们定义了显示它们的条件，告诉它们应该是什么样，然后让它自己解决其余的问题。 所有这些都可以使用修饰符完成，这些修饰符会将新的 `UI` 附加到我们的视图中，当满足条件时将显示该 `UI`。您可以根据需要附加任意数量，它们实际上是在等待观看，直到其条件变为真为止，此时它们将显示其 `UI`。例如，您可以在按钮按下时切换一个布尔值，从而触发显示警报。 您可以将演示文稿附加到主视图或其任何子视图，甚至可以附加到调整状态的按钮，以便触发演示文稿。这是一个微妙的区别，但重要的是要了解这些演示文稿并没有附加到按钮上，因为它是一个按钮-也就是说，由于轻按了按钮，因此不会以任何方式显示警报。相反，我们将其附加到我们的视图层次结构，以便 `SwiftUI` 意识到它可以随时显示。 ================================================ FILE: example/alerts-and-menus/demo10/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 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2021/3/26. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello, world!") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo10/Demo/Shared/Credits.rtf ================================================ {\rtf1\ansi\ansicpg936\cocoartf2578 \cocoatextscaling0\cocoaplatform0{\fonttbl\f0\fswiss\fcharset0 Helvetica;} {\colortbl;\red255\green255\blue255;} {\*\expandedcolortbl;;} \paperw12240\paperh15840\margl1440\margr1440\vieww9000\viewh8400\viewkind0 \pard\tx566\tx1133\tx1700\tx2267\tx2834\tx3401\tx3968\tx4535\tx5102\tx5669\tx6236\tx6803\pardirnatural\partightenfactor0 \f0\fs24 \cf0 \ \ {\field{\*\fldinst{HYPERLINK "https://github.com/jaywcjlove"}}{\fldrslt https://github.com/jaywcjlove}}} ================================================ FILE: example/alerts-and-menus/demo10/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/26. // import SwiftUI struct AppCommands: Commands { func action() {} func anotherAction() {} @CommandsBuilder var body: some Commands { CommandMenu("Menu") { Button(action: { action() }) { Text("Action") } Button(action: { anotherAction() }) { Text("Another action") } } } } struct MenuCommands: Commands { @Binding var toggleSetting: Bool var body: some Commands { CommandMenu("Custom Menu") { Button(action: { print("Menu Button selected") }, label: { Text("Menu Button") }) Divider() Toggle(isOn: $toggleSetting, label: { Text("Toggle") }) } } } @main struct DemoApp: App { @State private var toggleSetting = true var body: some Scene { WindowGroup { ContentView() } .commands { CommandGroup(replacing: CommandGroupPlacement.appVisibility) { EmptyView() } CommandGroup(replacing: CommandGroupPlacement.systemServices) { EmptyView() } CommandGroup(replacing: CommandGroupPlacement.pasteboard) { EmptyView() } CommandGroup(replacing: CommandGroupPlacement.windowSize) { EmptyView() } CommandGroup(replacing: CommandGroupPlacement.sidebar) { Button(action: { print("Sidebar Help!") }) { Text("Sidebar Help") } .keyboardShortcut("b", modifiers: .control) } // ToolbarCommands() // CommandGroup(replacing: ToolbarCommands) { //// EmptyView() // } // ToolbarCommands // CommandMenu("View") { // Button(action: {}) { // Text("MyApp Help") // } // } //// CommandGroup(replacing: .appInfo) {} // CommandGroup(replacing: .pasteboard) {} // CommandGroup(replacing: .systemServices) {} // CommandGroup(replacing: .appTermination) {} //// CommandGroup(replacing: .textEditing) {} // CommandGroup(replacing: .textFormatting) {} //// CommandGroupPlacement(replacing: .windowList) {} //// CommandGroupPlacement(replacing: .windowSize) {} // // CommandGroup(replacing: .undoRedo) { //// Button(action: { //// //// }) { //// Text("MyApp2 Help") //// } // } // // CommandMenu("Custom Menu") { // Button(action: { // print("Menu Button selected") // }, label: { // Text("Menu Button") // }) // // Divider() // } AppCommands() MenuCommands(toggleSetting: $toggleSetting) } } } ================================================ FILE: example/alerts-and-menus/demo10/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo10/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo10/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo10/README.md ================================================ 如何更改 macOS 应用中主菜单？ === 在 `macOS` 上，主菜单使用可用的命令菜单和组来组织其主菜单项。每个菜单都表示为顶层菜单栏菜单，并且每个命令组在一个顶层菜单中都有一组对应的菜单项，这些菜单项由分隔符菜单项分隔。 在 `iPadOS` 上，带有键盘快捷键的命令在快捷键可发现性 HUD 中公开，用户按住 `Command(⌘)` 键时可以看到它们。 ```swift @main struct passwordApp: App { var body: some Scene { WindowGroup { ContentView() } .commands { CommandGroup(replacing: .help) { Button(action: { print("Menu Button selected") }, label: { Text("Menu Button") }) .keyboardShortcut("b", modifiers: [.command, .shift, .control) Divider() Button(action: {}) { Text("MyApp Help") } .keyboardShortcut("b", modifiers: .control) } CommandMenu("Edit") { } } } } ``` 菜单项通常最好用分隔符分开，这可以通过在 `SwiftUI` 中添加 `Divider()` 来完成。 ## 编辑现有菜单 已经介绍了创建新菜单，但是如何将新项目添加到现有菜单呢？ 在这种情况下，请使用 `CommandGroup` 而不是 `CommandMenu`。 不同之处在于，您无需为菜单设置标题，而是给它提供了一个放置选项，并引用了现有的标准菜单项。 ```swift CommandGroup(after:, addition:) CommandGroup(before:, addition:) CommandGroup(replacing:, addition:) CommandGroup(replacing: .appInfo) {} ``` 在每种情况下，第一个参数都是 `CommandGroupPlacement`，它指定有限范围的标准菜单项中的一个。 ## 删除标准菜单项 如果您真的想摆脱默认菜单项（或项目组）之一，则可以使用 `CommandGroupPlacement` 并将现有的菜单项替换为 `EmptyView()`。 就人机界面指南而言，这可能不是一个好主意，但是如果需要的话，它是一个选择。 ```swift CommandGroup(replacing: CommandGroupPlacement.appVisibility) { EmptyView() } ``` 如果您希望能够以更自定义的方式响应它，也可以用自己的版本替换现有的菜单项。 我可以想象对“帮助”菜单项执行此操作，因为我不喜欢使用Apple的“帮助”系统，而是希望将用户定向到其他地方。 ## 使用单独的文件 如果要添加许多菜单，则可能开始感觉到您的 `DemoApp.swift` 文件有点拥挤。 您可以将这些菜单命令分成一个或多个单独的文件，只要它们包含在符合 `Commands` 协议且主体也符合 `Commands` 的结构中即可。 ```swift struct MenuCommands: Commands { @Binding var toggleSetting: Bool var body: some Commands { CommandMenu("Custom Menu") { Button(action: { print("Menu Button selected") }, label: { Text("Menu Button") }) Divider() Toggle(isOn: $toggleSetting, label: { Text("Toggle") }) } } } ``` 该结构不能拥有自己的数据，否则您会收到很多警告，但可以从其父级绑定到数据。 就像在 `Apple` 预设中一样，在命令修饰符中插入对此结构以及您创建的任何其他结构的调用。 ```swift @main struct DemoApp: App { @State private var toggleSetting = true var body: some Scene { WindowGroup { ContentView() } .commands { MenuCommands(toggleSetting: $toggleSetting) } } } ``` ## Bonus: Credits 每个Mac应用程序都有一个 `关于...` 菜单项，该菜单项会弹出一个简单的对话框，其中包含基本的应用程序信息：图标，应用程序名称和版本号。 这些将始终出现，但是有一种简单的方法可以在此信息下添加更多信息，并且可以包括格式化的文本和链接。 创建一个名为 `Credits.rtf` 的新文件 - `New` => `File` 对话框具有 `Rich Text File` 选项。具有此确切名称的文件中的任何内容都将在 `About` 框中的标准信息下方显示。 Xcode的RTF编辑器虽然不是很好，但是已经足够了。 文本编辑器上方有一些基本的格式设置工具，但您也可以右键单击文本以获取更多选项，包括“字体”和“颜色”面板。 要插入网络链接，请转到 `Editor` 菜单，然后选择 `Add Link...`。 ================================================ FILE: example/alerts-and-menus/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D99C67C260E5A7200D0ECDD /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D99C669260E5A7000D0ECDD /* DemoApp.swift */; }; 7D99C67D260E5A7200D0ECDD /* 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2021/3/27. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello, world!") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo11/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/27. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } #if os(macOS) Settings { SettingsView() } #endif } } ================================================ FILE: example/alerts-and-menus/demo11/Demo/Shared/SettingsView.swift ================================================ // // Settings.swift // Demo // // Created by 王楚江 on 2021/3/27. // import SwiftUI struct SettingsView: View { // @AppStorage("Color.zoom") @State private var selection = "Red" let colors = ["Red", "Green", "Blue", "Black", "Tartan"] var body: some View { Form { Picker("Select a paint color", selection: $selection) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(InlinePickerStyle()) } .frame(width: 300) .navigationTitle("Demo Settings") .padding(80) } } struct SettingsView_Previews: PreviewProvider { static var previews: some View { SettingsView() } } ================================================ FILE: example/alerts-and-menus/demo11/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo11/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo11/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo11/README.md ================================================ 如何添加偏好设置界面？ === 在 `macOS` 上，SwiftUI 的 `Settings` 是官方提供的方法为 `偏好设置界面` 添加界面。 ```swift struct SettingsView: View { @State private var selection = "Red" let colors = ["Red", "Green", "Blue", "Black", "Tartan"] var body: some View { Form { Picker("Select a paint color", selection: $selection) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(InlinePickerStyle()) } .frame(width: 300) .navigationTitle("Demo Settings") .padding(80) } } @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } #if os(macOS) Settings { SettingsView() } #endif } } ``` ================================================ FILE: example/alerts-and-menus/demo2/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { 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"version" : 1 } } ================================================ FILE: example/alerts-and-menus/demo2/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/alerts-and-menus/demo2/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct TVShow: Identifiable { var id: String { name } let name: String } struct ContentView: View { @State private var selectedShow: TVShow? var body: some View { VStack(spacing: 20) { Text("What is your favorite TV show?") .font(.headline) Button("Select Ted Lasso") { selectedShow = TVShow(name: "Ted Lasso") } Button("Select Bridgerton") { selectedShow = TVShow(name: "Bridgerton") } } .alert(item: $selectedShow) { show in Alert(title: Text(show.name), message: Text("Great choice!"), dismissButton: .cancel()) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo2/README.md ================================================ 如何显示警报？ === SwiftUI 提供了两种显示警报的方式，具体取决于您是要在布尔值变为true还是设置可选值时显示警报。 创建基本 SwiftUI 警报的代码如下所示： ```swift Alert(title: Text("Important message"), message: Text("Wear sunscreen"), dismissButton: .default(Text("Got it!"))) ``` 就像在 `UIAlertController` 中看到的那样，它定义了标题和消息，然后添加了具有默认样式和文本 `知道了！` 的关闭按钮。 为了显示警报，第一种方法是定义某种可绑定条件，该条件确定警报是否可见。 然后，将其附加到您的主视图，该主视图在条件为真时立即显示该警报。 例如，此代码创建一个 `showingAlert` 布尔值，该值跟踪是否应显示防晒霜消息，在点击按钮时将该 `Boolean` 设置为 `true`，然后使用该布尔值创建并附加警报视图，以便在点击按钮时显示该警告视图 ： ```swift struct ContentView: View { @State private var showingAlert = false var body: some View { Button("Show Alert") { showingAlert = true } .alert(isPresented: $showingAlert) { Alert(title: Text("Important message"), message: Text("Wear sunscreen"), dismissButton: .default(Text("知道了！"))) } } } ``` 提示：按下这样的警报时，在点击关闭按钮时，`showingAlert` 会自动设置为 `false`。 创建警报的第二种方法是绑定到符合 `Identifiable` 的某些可选状态，这将导致在对象的值更改时显示警报。 此方法有两个优点： - 您可以在运行时附加任何您喜欢的对象，因此您的警报可以显示任意数量的不同数据。 - SwiftUI在有值时会自动将其拆包，因此您可以确定要在显示警报之前将其存在 - 无需自己检查和拆包该值。 例如，根据选择的电视节目，这将显示一个具有两个不同值的警报： ```swift struct TVShow: Identifiable { var id: String { name } let name: String } struct ContentView: View { @State private var selectedShow: TVShow? var body: some View { VStack(spacing: 20) { Text("What is your favorite TV show?") .font(.headline) Button("Select Ted Lasso") { selectedShow = TVShow(name: "Ted Lasso") } Button("Select Bridgerton") { selectedShow = TVShow(name: "Bridgerton") } } .alert(item: $selectedShow) { show in Alert(title: Text(show.name), message: Text("Great choice!"), dismissButton: .cancel()) } } } ``` ================================================ FILE: 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.cancel() ) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo3/README.md ================================================ 如何为 `alert` 按钮添加动作？ === 基本的SwiftUI警报如下所示： ```swift Alert( title: Text("Important message"), message: Text("Wear sunscreen"), dismissButton: .default(Text("Got it!")) ) ``` 但是，您经常需要将动作附加到按钮上，以便在点击它们时执行特定的动作。 为此，请在您的按钮上附加一个闭包，当您点击按钮时将其关闭，如下所示： ```swift struct ContentView: View { @State private var showingAlert = false var body: some View { Button("Show Alert") { showingAlert = true } .alert(isPresented:$showingAlert) { Alert( title: Text("Are you sure you want to delete this?"), message: Text("There is no undo"), primaryButton: .destructive(Text("Delete")) { print("Deleting...") }, secondaryButton: .cancel() ) } } } ``` 无法为警报添加两个以上的按钮 - 如果您要这样做，则应改用操作表。 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} Button("Show 2") { showingAlert2 = true } .alert(isPresented: $showingAlert2) { Alert(title: Text("Two"), message: nil, dismissButton: .cancel()) } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo4/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo4/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo4/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo4/README.md ================================================ 如何在单个视图中显示多个 `alert`？ === SwiftUI 使得显示单个警报相对容易，但是，如果您尝试从单个视图中显示两个或多个警报，则事情将变得更加棘手-例如，您可能会发现一个警报有效而另一个警报无效。 要解决此问题，您需要确保在每个视图上附加不超过一个 `alert()` 修饰符。 听起来可能有限制，但请记住：您无需将警报附加到同一视图–您可以将它们附加在任何地方。 实际上，您可能会发现将它们直接附加到显示它们的内容（例如按钮）上最适合您。 例如，我们可以编写一些代码定义两个 `@State` 属性，每个属性控制显示的警报。 与其将两个 `alert()` 修饰符都附加到同一个 `VStack` 上，不如将它们分别附加到负责显示该警告的任何按钮上： ```swift struct ContentView: View { @State private var showingAlert1 = false @State private var showingAlert2 = false var body: some View { VStack { Button("Show 1") { showingAlert1 = true } 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2021/3/24. // import SwiftUI struct ContentView: View { @State private var showingSheet = false var body: some View { Button("Show Action Sheet") { showingSheet = true } .actionSheet(isPresented: $showingSheet) { #if os(iOS) return ActionSheet( title: Text("What do you want to do?"), message: Text("There's only one choice..."), buttons: [.default(Text("Dismiss Action Sheet"))] ) #endif } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo5/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo5/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo5/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo5/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo5/README.md ================================================ 如何显示动作面板？ === SwiftUI 为我们提供了用于创建操作表以供用户选择的 `ActionSheet` 视图，其工作方式与警报类似。 与警报一样，您需要定义一个属性，该属性将跟踪操作表是否可见。 然后，使用 `actionSheet()` 修饰符监视该属性，并在条件变为true时显示您选择的操作表。 重要：操作表在 `macOS` 上不可用。 例如，这是一个示例视图，当点击按钮时会触发一个动作表： ```swift struct ContentView: View { @State private var showingSheet = false var body: some View { Button("Show Action Sheet") { showingSheet = true } .actionSheet(isPresented: $showingSheet) { ActionSheet( title: Text("What do you want to do?"), message: Text("There's only one choice..."), buttons: [.default(Text("Dismiss Action Sheet"))] ) } } } ``` ================================================ FILE: example/alerts-and-menus/demo6/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DB7F767260AF8D9008F3D92 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F754260AF8D7008F3D92 /* DemoApp.swift */; }; 7DB7F768260AF8D9008F3D92 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F754260AF8D7008F3D92 /* DemoApp.swift */; }; 7DB7F769260AF8D9008F3D92 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F755260AF8D7008F3D92 /* ContentView.swift */; }; 7DB7F76A260AF8D9008F3D92 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2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { VStack { Text("选项") .contextMenu { Button { print("Change country setting") } label: { Label("Choose Country", systemImage: "globe") } Button { print("Enable geolocation") } label: { Label("Detect Location", systemImage: "location.circle") } } } .frame(width: 200, height: 360, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion 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$(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo6/README.md ================================================ 如何显示上下文菜单？ === SwiftUI 为我们提供了 `ContextMenu` 修饰符，用于在我们的应用中创建弹出菜单。 在 `iOS` 中，通常长按即可触发此操作，但其功能与在macOS上单击鼠标右键相同-这是一种灵活的API。 上下文菜单由一组按钮组成，每个按钮都有自己的操作，文本和图标。 文本和图标可以直接在按钮内部提供，因为 `SwiftUI` 将提供隐式的 `HStack` 来确保它们适合系统标准外观。 因此，如果我们希望将上下文菜单附加到某些文本，则可以为该菜单提供两个按钮，如下所示： ```swift Text("选项") .contextMenu { Button { 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2021/3/24. // import SwiftUI import StoreKit struct ContentView: View { @State private var showRecommended = false var body: some View { Button("Show Recommended App") { showRecommended.toggle() } .appStoreOverlay(isPresented: $showRecommended) { SKOverlay.AppConfiguration(appIdentifier: "1440611372", position: .bottom) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo7/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo7/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo7/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo7/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo7/README.md ================================================ 如何使用 `appStoreOverlay()` 推荐另一个应用程序？ === SwiftUI 为我们提供了一个专用的修饰符，可以在 `App Store` 上推荐其他应用，这是与用户交叉销售的好方法 - “如果您喜欢它，您也会喜欢它”，依此类推。 如果您使用的是应用剪辑，这将特别有用，一旦用户执行了主要操作，您就可以在剪辑中推荐完整的应用。 此修改器需要观察一些状态，这些状态将确定 `App Store` 叠加层是否处于活动状态，以及 `SKOverlay.AppConfiguration` 来确定推荐哪个应用程序。 重要： `appStoreOverlay()`在 `macOS`上不可用，需要添加 `import StoreKit`。 例如，当按下按钮时，这将推荐一个特定的应用程序： ```swift import StoreKit struct ContentView: View { @State private var showRecommended = false var body: some View { Button("Show Recommended App") { showRecommended.toggle() } .appStoreOverlay(isPresented: $showRecommended) { SKOverlay.AppConfiguration(appIdentifier: "1440611372", position: .bottom) } } } ``` ================================================ FILE: example/alerts-and-menus/demo8/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DB7F7B9260AFEDF008F3D92 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F7A6260AFEDE008F3D92 /* DemoApp.swift */; }; 7DB7F7BA260AFEDF008F3D92 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F7A6260AFEDE008F3D92 /* DemoApp.swift */; }; 7DB7F7BB260AFEDF008F3D92 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F7A7260AFEDE008F3D92 /* ContentView.swift 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2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { Menu("Options") { Button("Order Now", action: placeOrder) Button("Adjust Order", action: adjustOrder) Menu("Advanced") { Button("Rename", action: rename) Button("Delay", action: delay) } Button("Cancel", action: cancelOrder) } Menu { Button("Order Now", action: placeOrder) Button("Adjust Order", action: adjustOrder) } label: { Label("Options", systemImage: "paperplane") } } func placeOrder() { } func adjustOrder() { } func rename() { } func delay() { } func cancelOrder() { } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo8/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo8/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo8/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo8/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo8/README.md ================================================ 按下按钮时如何显示菜单？ === SwiftUI 为我们提供了一个专用视图，用于显示按钮的弹出菜单，称为菜单。 可以从简单的字符串或使用自定义视图创建此视图，但是可以通过两种方式发送各种按钮来控制要显示在菜单中的内容。 提示：在 `macOS` 上，`Menu`会自动呈现为下拉按钮。 例如，我们可以创建一个简单的按钮，其中包含以下几个选项： ```swift struct ContentView: View { var body: some View { Menu("Options") { Button("Order Now", action: placeOrder) Button("Adjust Order", action: adjustOrder) Button("Cancel", action: cancelOrder) } } func placeOrder() { } func adjustOrder() { } func cancelOrder() { } } ``` 您还可以根据需要将菜单放置在菜单中，这将导致iOS在点击第一个选项时显示第二个菜单： ```swift struct ContentView: View { var body: some View { Menu("Options") { Button("Order Now", action: placeOrder) Button("Adjust Order", action: adjustOrder) Menu("Advanced") { Button("Rename", action: rename) Button("Delay", action: delay) } Button("Cancel", action: cancelOrder) } } func placeOrder() { } func adjustOrder() { } func rename() { } func delay() { } func cancelOrder() { } } ``` 如果您想要使用一些文本和图标的自定义标签，则可以使用以下方法： ```swift struct ContentView: View { var body: some View { Menu { Button("Order Now", action: placeOrder) Button("Adjust Order", action: adjustOrder) } label: { Label("Options", systemImage: "paperplane") 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paint color", selection: $selection) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(MenuPickerStyle()) Text("Selected color: \(selection)") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/alerts-and-menus/demo9/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/alerts-and-menus/demo9/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/alerts-and-menus/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/alerts-and-menus/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/alerts-and-menus/demo9/README.md ================================================ 如何让用户从菜单中选择选项？ === SwiftUI的 `Picker` 视图具有一种称为 `MenuPickerStyle` 的专用样式，该样式显示其选项的弹出菜单，并且 `Picker` 的标签显示为可点击的按钮。 菜单本身将自动在当前选择的选项旁边显示一个复选标记，并且可以根据屏幕上选取器的位置向上或向下显示。 为了说明这一点，我们可以制作一个小菜单按钮，让用户选择一种绘画颜色： ```swift struct ContentView: View { @State private var selection = "Red" let colors = ["Red", "Green", "Blue", "Black", "Tartan"] var body: some View { VStack { Picker("Select a paint color", selection: $selection) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(MenuPickerStyle()) Text("Selected color: \(selection)") } } } ``` 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================================================ ================================================ FILE: example/animation/demo1/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo1/README.md ================================================ 如何创建基本动画？ === SwiftUI 的 `animation()` 修饰符内置了对动画的支持。 要使用此修改器，请将其放置在视图的任何其他修改器之后，并告诉它所需的动画类型。 例如，这段代码创建了一个按钮，每次按下该按钮，其缩放效果就会增加1： ```swift struct ContentView: View { @State private var scale: CGFloat = 1 var body: some View { Button("Press here") { scale += 1 } .scaleEffect(scale) .animation(.linear(duration: 1)) } } ``` 这会使动画发生超过 `1` 秒钟，但是如果您不想为动画指定准确的时间，则可以使用 `.linear`。 除了简单的线性动画，您还可以从 `.easeIn`，`.easeOut`，`.easeInOut` 指定一条曲线，或者使用 `.timingCurve` 指定自己的控制点。 例如，这使缩放效果动画化，从而使其开始缓慢并变得更快： ```swift struct ContentView: View { @State private var scale: CGFloat = 1 var body: some View { Button("Press here") { scale += 1 } .scaleEffect(scale) .animation(.easeIn) } } ``` 您可以设置许多其他修改器的动画，例如 `2D` 和 `3D` 旋转，不透明度，边框等。 例如，这使按钮每次旋转都会旋转并增加其边框： ```swift struct ContentView: View { @State private var angle: Double = 0 @State private var borderThickness: CGFloat = 1 var body: some View { Button("Press here") { angle += 45 borderThickness += 1 } .padding() .border(Color.red, width: borderThickness) .rotationEffect(.degrees(angle)) .animation(.easeIn) } } ``` ================================================ FILE: example/animation/demo10/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo10/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo10/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo10/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var showDetails = false var body: some View { VStack { Button("Press to show details") { withAnimation { showDetails.toggle() } } if showDetails { Text("Details go here.") .transition(.asymmetric(insertion: .move(edge: .leading), removal: .move(edge: .bottom))) } } .frame(width: 300, height: 260, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/animation/demo10/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/animation/demo10/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { 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例如，我们可以创建一个使用非对称过渡的文本视图，这样它在添加时从前边缘移入，而在删除时则向下移至底部边缘，如下所示： ```swift struct ContentView: View { @State private var showDetails = false var body: some View { VStack { Button("Press to show details") { withAnimation { showDetails.toggle() } } if showDetails { Text("Details go here.") .transition(.asymmetric(insertion: .move(edge: .leading), removal: .move(edge: .bottom))) } } } } ``` ================================================ FILE: example/animation/demo11/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo11/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo11/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo11/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ScaledCircle: Shape { // 这可控制绘图矩形内部的圆的大小。 // 值为0时，圆圈是不可见的； // 值为1时，圆圈将填充矩形。 var animatableData: CGFloat func path(in rect: CGRect) -> Path { let maximumCircleRadius = sqrt(rect.width * rect.width + rect.height * rect.height) let circleRadius = maximumCircleRadius * animatableData let x = rect.midX - circleRadius / 2 let y = rect.midY - circleRadius / 2 let circleRect = CGRect(x: x, y: y, width: circleRadius, height: circleRadius) return Circle().path(in: circleRect) } } // 可以使用任何形状剪切任何视图的常规修改器。 struct ClipShapeModifier: ViewModifier { let shape: T func body(content: Content) -> some View { content.clipShape(shape) } } // 结合了 ScaledCircle 和 ClipShapeModifier 的自定义过渡。 extension AnyTransition { static var iris: AnyTransition { .modifier( active: ClipShapeModifier(shape: ScaledCircle(animatableData: 0)), identity: ClipShapeModifier(shape: ScaledCircle(animatableData: 1)) ) } } // 使用我们的转场显示和隐藏红色矩形的示例视图移动。 struct ContentView: View { @State private var isShowingRed = false var body: some View { ZStack { Color.blue .frame(width: 200, height: 200) if isShowingRed { Color.red .frame(width: 200, height: 200) .transition(.iris) .zIndex(1) } } .padding(50) .onTapGesture { withAnimation(.easeInOut) { isShowingRed.toggle() } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/animation/demo11/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/animation/demo11/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/animation/demo11/Demo/Demo/Info.plist ================================================ 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`ViewModifier` 结构，以将任何形状（在我们的示例中为缩放圆）应用为另一个视图的剪辑形状。 3. 将其包装在 `AnyTransition` 扩展中，以将该修饰符包装在过渡中，以便于访问。 4. 创建一个 `SwiftUI` 视图以演示我们的过渡过程。 这是代码，并附有注释以说明发生了什么： ```swift struct ScaledCircle: Shape { // 这可控制绘图矩形内部的圆的大小。 // 值为0时，圆圈是不可见的； // 值为1时，圆圈将填充矩形。 var animatableData: CGFloat func path(in rect: CGRect) -> Path { let maximumCircleRadius = sqrt(rect.width * rect.width + rect.height * rect.height) let circleRadius = maximumCircleRadius * animatableData let x = rect.midX - circleRadius / 2 let y = rect.midY - circleRadius / 2 let circleRect = CGRect(x: x, y: y, width: circleRadius, height: circleRadius) return Circle().path(in: circleRect) } } // 可以使用任何形状剪切任何视图的常规修改器。 struct ClipShapeModifier: ViewModifier { let shape: T func body(content: Content) -> some View { content.clipShape(shape) } } // 结合了 ScaledCircle 和 ClipShapeModifier 的自定义过渡。 extension AnyTransition { static var iris: AnyTransition { .modifier( active: ClipShapeModifier(shape: ScaledCircle(animatableData: 0)), identity: ClipShapeModifier(shape: ScaledCircle(animatableData: 1)) ) } } // 使用我们的转场显示和隐藏红色矩形的示例视图移动。 struct ContentView: View { @State private var isShowingRed = false var body: some View { ZStack { Color.blue .frame(width: 200, height: 200) if isShowingRed { Color.red .frame(width: 200, height: 200) .transition(.iris) .zIndex(1) } } .padding(50) .onTapGesture { withAnimation(.easeInOut) { isShowingRed.toggle() } } } } ``` ================================================ FILE: example/animation/demo12/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo12/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo12/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo12/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct AnimatableSystemFontModifier: AnimatableModifier { var size: CGFloat var weight: Font.Weight var design: Font.Design var animatableData: CGFloat { get { size } set { size = newValue } } func body(content: Content) -> some View { content .font(.system(size: size, weight: weight, design: design)) } } extension View { func animatableSystemFont(size: CGFloat, weight: Font.Weight = .regular, design: Font.Design = .default) -> some View { self.modifier(AnimatableSystemFontModifier(size: size, weight: weight, design: design)) } } struct ContentView: View { @State private var fontSize: CGFloat = 32 var body: some View { Text("Hello, World!") .animatableSystemFont(size: fontSize) .onTapGesture { withAnimation(Animation.spring(response: 0.5, dampingFraction: 0.5, blendDuration: 1).repeatForever()) { fontSize = 72 } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: 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example/animation/demo12/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo12/README.md ================================================ 如何设置文字大小的动画？ === SwiftUI没有内置的动画文本大小的方法，但是我们可以创建一个 `AnimatableModifier` 来实现这种效果。 这与使用简单的 `scaleEffect()` 修饰符不同，后者会导致您的文本在放大时变得模糊，而此自定义动画将正确地重新渲染您的文本，因此在所有大小下都看起来不错。 这需要几个步骤： 1. 创建一个 `AnimatableModifier` 来接受名称和大小，并将 `size` 属性用于其可设置动画的数据。 2. 将其包装在 `View` 扩展中，使其更易于使用。 3. 在 `SwiftUI` 视图中进行尝试。 这是完整的代码示例： ```swift // 通过各种大小为字体设置动画效果的修改器。 struct AnimatableCustomFontModifier: AnimatableModifier { var name: String var size: CGFloat var animatableData: CGFloat { get { size } set { size = newValue } } func body(content: Content) -> some View { content .font(.custom(name, size: size)) } } // 为了使其更易于使用，我建议将其包装在 `View` 扩展中，如下所示： extension View { func animatableFont(name: String, size: CGFloat) -> some View { self.modifier(AnimatableCustomFontModifier(name: name, size: size)) } } // 一个示例View试用 struct ContentView: View { @State private var fontSize: CGFloat = 32 var body: some View { Text("Hello, World!") .animatableFont(name: "Georgia", size: fontSize) .onTapGesture { withAnimation(Animation.spring(response: 0.5, dampingFraction: 0.5, blendDuration: 1).repeatForever()) { fontSize = 72 } } } } ``` 而已！ 要进行尝试，请创建一个 `@State` 属性以存储您的字体大小，然后将其传递给 `animatableFont()`。 如果您想使用 `Apple` 的系统字体，最好的方法是使用单独的 `AnimatableModifier`。 这样，如果字体发生更改，您可以确保UI保持更新。 外观如下： ```swift struct AnimatableSystemFontModifier: AnimatableModifier { var size: CGFloat var weight: Font.Weight var design: Font.Design var animatableData: CGFloat { get { size } set { size = newValue } } func body(content: Content) -> some View { content .font(.system(size: size, weight: weight, design: design)) } } extension View { func animatableSystemFont(size: CGFloat, weight: Font.Weight = .regular, design: Font.Design = .default) -> some View { self.modifier(AnimatableSystemFontModifier(size: size, weight: weight, design: design)) } } struct ContentView: View { @State private var fontSize: CGFloat = 32 var body: some View { Text("Hello, World!") .animatableSystemFont(size: fontSize) .onTapGesture { withAnimation(Animation.spring(response: 0.5, dampingFraction: 0.5, blendDuration: 1).repeatForever()) { fontSize = 72 } } } } ``` 我首先在 Apple [示例代码](https://developer.apple.com/documentation/swiftui/fruta_building_a_feature-rich_app_with_swiftui) 中看到了这种技术。 ================================================ FILE: example/animation/demo13/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo13/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json 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example/animation/demo13/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var isZoomed = false var body: some View { VStack { Button("Toggle Zoom") { var transaction = Transaction(animation: .linear) transaction.disablesAnimations = true withTransaction(transaction) { isZoomed.toggle() } } Spacer() .frame(height: 100) Text("Zoom Text 1") .font(.title) .scaleEffect(isZoomed ? 3 : 1) Spacer() .frame(height: 100) Text("Zoom Text 2") .font(.title) .scaleEffect(isZoomed ? 3 : 1) .transaction { t in t.animation = .none } } .frame(width: 360, height: 460, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/animation/demo13/Demo/Demo/Demo.entitlements ================================================ 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IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo13/README.md ================================================ 如何用事务覆盖动画？ === SwiftUI 提供了 `withTransaction()` 函数，该函数允许我们在运行时覆盖动画，例如，删除隐式动画并将其替换为自定义内容。 例如，此代码在小号和大号之间切换一些文本，并且由于附加了隐式动画，因此始终进行动画处理： ```swift struct ContentView: View { @State private var isZoomed = false var body: some View { VStack { Button("Toggle Zoom") { isZoomed.toggle() } Spacer() .frame(height: 100) Text("Zoom Text") .font(.title) .scaleEffect(isZoomed ? 3 : 1) .animation(.easeInOut(duration: 2)) } } } ``` `Transactions` 使我们可以逐案地覆盖现有动画。 例如，您可能决定在特定情况下希望文本的动画以快速，线性的方式发生，而不是现有的动画。 为此，请首先使用所需的动画创建一个新的 `Transaction` 实例，然后将其 `disablesAnimations` 值设置为 `true`，以便覆盖将应用的所有现有动画。 准备就绪后，请使用事务对象调用 `withTransaction()`，然后继续调整您要更改的所有状态-这一切都将使用你的事务来动画化。 为了演示这一点，这里是我们相同的文本缩放示例代码，除了使用事务来插入自定义动画以覆盖隐式动画之外，它还包括： ```swift struct ContentView: View { @State private var isZoomed = false var body: some View { VStack { Button("Toggle Zoom") { var transaction = Transaction(animation: .linear) transaction.disablesAnimations = true withTransaction(transaction) { isZoomed.toggle() } } Spacer() .frame(height: 100) Text("Zoom Text") .font(.title) .scaleEffect(isZoomed ? 3 : 1) .animation(.easeInOut(duration: 2)) } } } ``` 为了获得更多控制，您可以将 `transaction()` 修饰符附加到所需的任何视图，从而允许您覆盖应用于该视图的所有事务。 例如，我们可以在示例中添加第二个缩放文本视图，仍然使用事务来触发缩放动画，但这次我们将在第二个文本视图上使用 `transaction()` 修饰符，以禁用该视图上的任何事务–实际上，我们正在覆盖替代项： ```swift struct ContentView: View { @State private var isZoomed = false var body: some View { VStack { Button("Toggle Zoom") { var transaction = Transaction(animation: .linear) transaction.disablesAnimations = true withTransaction(transaction) { isZoomed.toggle() } } Spacer() .frame(height: 100) Text("Zoom Text 1") .font(.title) .scaleEffect(isZoomed ? 3 : 1) Spacer() .frame(height: 100) Text("Zoom Text 2") .font(.title) .scaleEffect(isZoomed ? 3 : 1) .transaction { t in t.animation = .none } } } } ``` 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example/animation/demo2/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo2/README.md ================================================ 如何制作弹簧动画？ === `SwiftUI` 内置了对春季动画的支持，这些动画会移动到目标点，过冲一些然后反弹。 如果仅使用 `.spring()` 而不使用任何参数，则会得到一个明智的默认值。 因此，这将创建一个 `Spring` 动画，每次点击按钮会将按钮旋转45度： ```swift struct ContentView: View { @State private var angle: Double = 0 var body: some View { Button("Press here") { angle += 45 } .padding() .rotationEffect(.degrees(angle)) .animation(.spring()) } } ``` 如果您想对弹簧动画进行细粒度的控制，请输入您感兴趣的任何参数：物体的质量，弹簧的刚度，弹簧减慢的速度以及在发射时开始移动的速度 。 例如，这将创建一个具有适度弹簧阻尼的按钮，这意味着它将在达到目标角度之前来回弹跳几次： ```swift struct ContentView: View { @State private var angle: Double = 0 var body: some View { Button("Press here") { angle += 45 } .padding() .rotationEffect(.degrees(angle)) .animation(.interpolatingSpring(mass: 1, stiffness: 1, damping: 0.5, initialVelocity: 10)) } } ``` 注意：这是一个插补弹簧，这意味着如果多次触发动画，则弹簧组合时，弹簧效果将越来越强。 ================================================ FILE: example/animation/demo3/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo3/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", 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FILE: example/animation/demo3/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo3/README.md ================================================ 如何为绑定值的变化制作动画？ === SwiftUI的双向绑定使我们可以调整程序的状态，并且可以通过调整视图层次结构来对此做出响应。 例如，我们可能使某些文本出现或消失，或者调整视图的不透明度。 除了可以立即进行状态更改外，我们还可以对绑定进行动画处理，方法是通过向其绑定中添加 `animation()` 来修改绑定。 例如，此视图具有一个切换，该切换根据切换的阶段显示或隐藏文本视图： ```swift struct ContentView: View { @State private var showingWelcome = false var body: some View { VStack { Toggle("Toggle label", isOn: $showingWelcome) if showingWelcome { Text("Hello World") } } } } ``` 没有动画，文本视图将立即出现或消失，从而导致视觉跳转。 如果我们修改切换开关，使其绑定到 `$showingWelcome.animation()`，则文本视图将平滑滑动： ```swift struct ContentView: View { @State private var showingWelcome = false var body: some View { VStack { Toggle("Toggle label", isOn: $showingWelcome.animation()) if showingWelcome { Text("Hello World") } } } } ``` 如果要对动画进行更多控制，可以将参数传递给 `animation()`，这些参数会影响过渡的发生方式。 例如，这将使文本带有一个简单的 `spring` 动画：`$showingWelcome.animation(.spring())`。 ================================================ FILE: example/animation/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo4/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo4/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo4/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var opacity = 1.0 var body: some View { Button("Press here") { withAnimation { opacity -= 0.2 } } .padding() .opacity(opacity) .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } 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FILE: example/animation/demo4/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo4/README.md ================================================ 如何创建显式动画？ === 如果将动画修改器附加到视图，则最终会得到隐式动画-即使只是增加整数或切换布尔值，更改视图其他位置的某些状态也可能会使用动画。 一种替代方法是使用显式动画，在这种情况下，您无需在相关视图上附加修饰符，而是要求 `SwiftUI` 为要进行的精确更改设置动画。 为此，请将您的更改包装在对 `withAnimation()` 的调用中。 例如，它使用显式动画使按钮每次被点击时稍微消失一些： ```swift struct ContentView: View { @State private var opacity = 1.0 var body: some View { Button("Press here") { withAnimation { opacity -= 0.2 } } .padding() .opacity(opacity) } } ``` `withAnimation()` 使用一个参数来指定所需的动画类型，因此您可以创建一个三秒钟的线性动画，如下所示：`withAnimation(.linear(duration：3))` 显式动画通常很有用，因为它们会导致动画的每个受影响的视图，而不仅仅是附加了隐式动画的视图。 例如，如果 `视图A` 作为动画的一部分必须为 `视图B` 腾出空间，但是只有 `视图B` 附加了动画，那么除非您使用显式动画，否则视图A将跳到其新位置而不进行动画处理。 ================================================ FILE: 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IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo5/README.md ================================================ 如何延迟动画？ === 当您创建任何动画（隐式，显式或使用绑定）时，可以将修饰符附加到该动画以调整其工作方式。 例如，如果希望动画在一定秒数后开始播放，则应使用 `delay()`修饰符。 例如，这将创建一个红色矩形，在点击该矩形时，它将使用两秒钟的动画（延迟一秒钟）旋转360度： ```swift struct ContentView: View { @State var rotation = 0.0 var body: some View { Rectangle() .fill(Color.red) .frame(width: 200, height: 200) .rotationEffect(.degrees(rotation)) .animation(Animation.easeInOut(duration: 3).delay(1)) .onTapGesture { rotation += 360 } } } ``` ================================================ FILE: example/animation/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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================================================ FILE: example/animation/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI // Create an immediate animation. extension View { func animate(using animation: Animation = Animation.easeInOut(duration: 1), _ action: @escaping () -> Void) -> some View { onAppear { withAnimation(animation) { action() } } } } // Create an immediate, looping animation extension View { func animateForever(using animation: Animation = Animation.easeInOut(duration: 1), autoreverses: Bool = false, _ action: @escaping () -> Void) -> some View { let repeated = animation.repeatForever(autoreverses: autoreverses) return onAppear { withAnimation(repeated) { action() } } } } struct ContentView: View { @State var scale: CGFloat = 1 var body: some View { Circle() .frame(width: 200, height: 200) .scaleEffect(scale) .animateForever(autoreverses: true) { scale = 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================================================ ================================================ FILE: example/animation/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/animation/demo6/README.md ================================================ 视图出现后如何立即启动动画？ === 如果希望 `SwiftUI` 视图一出现就立即开始动画处理，则应使用 `onAppear()` 修饰符附加动画。 首先，我将向您展示基本代码，然后再展示两个用来简化此过程的扩展程序。 首先，是简单的版本–这会创建一个永远缩放的圆圈： ```swift struct ContentView: View { @State var scale: CGFloat = 1 var body: some View { Circle() .frame(width: 200, height: 200) .scaleEffect(scale) .onAppear { let baseAnimation = Animation.easeInOut(duration: 1) let repeated = baseAnimation.repeatForever(autoreverses: true) withAnimation(repeated) { scale = 0.5 } } } } ``` 如果您打算频繁添加初始动画，则明智的做法是在 `View` 协议中添加一些扩展，以使其变得更容易。 为了说明这一点，下面的两个扩展添加了 `animate()` 和 `animateForever()` 修饰符，使您可以自定义所需的动画并整齐地包装整个行为： ```swift // Create an immediate animation. extension View { func animate(using animation: Animation = Animation.easeInOut(duration: 1), _ action: @escaping () -> Void) -> some View { onAppear { withAnimation(animation) { action() } } } } // Create an immediate, looping animation extension View { func animateForever(using animation: Animation = Animation.easeInOut(duration: 1), autoreverses: Bool = false, _ action: @escaping () -> Void) -> some View { let repeated = animation.repeatForever(autoreverses: autoreverses) return onAppear { withAnimation(repeated) { action() } } } } // Try out our extensions with the scaling circle. struct ContentView: View { @State var scale: CGFloat = 1 var body: some View { Circle() .frame(width: 200, height: 200) .scaleEffect(scale) .animateForever(autoreverses: true) { scale = 0.5 } } } ``` ================================================ FILE: 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Color.green : Color.red) .animation(nil) .clipShape(RoundedRectangle(cornerRadius: isEnabled ? 100 : 0)) .animation(.default) } } ``` 使用此技术，可以根据需要对每个修改器进行不同的动画处理。 ================================================ FILE: example/animation/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo8/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo8/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @Namespace private var animation @State private var isZoomed = false var frame: CGFloat { isZoomed ? 300 : 44 } var body: some View { VStack { Spacer() VStack { HStack { RoundedRectangle(cornerRadius: 10) .fill(Color.blue) .frame(width: frame, height: frame) .padding(.top, isZoomed ? 20 : 0) if isZoomed == false { Text("Taylor Swift – 1989") .matchedGeometryEffect(id: "AlbumTitle", in: animation) .font(.headline) Spacer() } } if isZoomed == true { Text("Taylor Swift – 1989") .matchedGeometryEffect(id: "AlbumTitle", in: animation) .font(.headline) .padding(.bottom, 60) Spacer() } } .onTapGesture { withAnimation(.spring()) { isZoomed.toggle() } } .padding() .frame(maxWidth: .infinity) .frame(height: 400) .background(Color(white: 0.9)) .foregroundColor(.black) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/animation/demo8/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/animation/demo8/Demo/Demo/DemoApp.swift 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如何使用 matchedGeometryEffect() 将动画从一个视图同步到另一个视图？ === 如果同一视图出现在视图层次结构的两个不同部分中，并且希望在它们之间进行动画处理（例如，从列表视图转到缩放的详细视图），则应使用 `SwiftUI` 的 `matchedGeometryEffect()` 修饰符，这有点 例如 `Keynote` 中的 `Magic Move`。 要使用修饰符，请将其附加到在层次结构的不同部分中相同的一对视图。 完成此操作后，当您在两种视图状态之间切换时，您会发现 `SwiftUI` 可以平滑地对同步视图进行动画处理。 要进行尝试，请首先创建某种布局，其中视图将出现在两个位置。 在此示例中，我有一个红色圆圈，然后在一个视图状态下有一些文本，但是在另一视图状态下，该圆圈在文本之后并更改了颜色： ```swift struct ContentView: View { @State private var isFlipped = false var body: some View { VStack { if isFlipped { Circle() .fill(Color.red) .frame(width: 44, height: 44) Text("Taylor Swift – 1989") .font(.headline) } else { Text("Taylor Swift – 1989") .font(.headline) Circle() .fill(Color.blue) .frame(width: 44, height: 44) } } .onTapGesture { withAnimation { isFlipped.toggle() } } } } ``` 如果运行该命令，您会看到 `SwiftUI` 淡入和淡出视图以创建过渡-可以，但是我们可以做得更好。 首先，您需要使用 `@Namespace` 属性包装器为您的视图创建一个全局名称空间。 实际上，这不是视图上的属性，而是在幕后使我们可以将视图附加在一起。 因此，您可以添加如下所示的属性：`@Namespace private var animation`。 接下来，您需要向要使用同步效果进行动画处理的所有视图中添加 `.matchedGeometryEffect(id：YourIdentifierHere，in：animation)`。 `YourIdentifierHere` 部分应替换为您的配对中每个部分共享的唯一编号。 在我们的示例中，我们可以将其用于圈子： ```swift .matchedGeometryEffect(id: "Shape", in: animation) ``` 并将其用作文本： ```swift .matchedGeometryEffect(id: "AlbumTitle", in: animation) ``` 就是这样–再次运行该示例时，您将看到两个视图平滑移动。 最终代码如下： ```swift struct ContentView: View { @Namespace private var animation @State private var isFlipped = false var body: some View { VStack { if isFlipped { Circle() .fill(Color.red) .frame(width: 44, height: 44) .matchedGeometryEffect(id: "Shape", in: animation) Text("Taylor Swift – 1989") .matchedGeometryEffect(id: "AlbumTitle", in: animation) .font(.headline) } else { Text("Taylor Swift – 1989") .matchedGeometryEffect(id: "AlbumTitle", in: animation) .font(.headline) Circle() .fill(Color.blue) .frame(width: 44, height: 44) .matchedGeometryEffect(id: "Shape", in: animation) } } .onTapGesture { withAnimation { isFlipped.toggle() } } } } ``` 对于更高级的示例，请尝试以下操作–它借鉴了 `Apple Music` 的专辑显示风格，在点击时将小视图扩展为更大的视图。 在此示例中，仅文本是动画的，因为其位置在改变： ```swift struct ContentView: View { @Namespace private var animation @State private var isZoomed = false var frame: CGFloat { isZoomed ? 300 : 44 } var body: some View { VStack { Spacer() VStack { HStack { RoundedRectangle(cornerRadius: 10) .fill(Color.blue) .frame(width: frame, height: frame) .padding(.top, isZoomed ? 20 : 0) if isZoomed == false { Text("Taylor Swift – 1989") .matchedGeometryEffect(id: "AlbumTitle", in: animation) .font(.headline) Spacer() } } if isZoomed == true { Text("Taylor Swift – 1989") .matchedGeometryEffect(id: "AlbumTitle", in: animation) .font(.headline) .padding(.bottom, 60) Spacer() } } .onTapGesture { withAnimation(.spring()) { isZoomed.toggle() } } .padding() .frame(maxWidth: .infinity) .frame(height: 400) .background(Color(white: 0.9)) .foregroundColor(.black) } } } ``` ================================================ FILE: 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Text("Details go here.") .transition(.scale) } } .frame(width: 300, height: 200, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/animation/demo9/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/animation/demo9/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/animation/demo9/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/animation/demo9/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/animation/demo9/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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Text("Details go here.") .transition(.slide) // Starts small and grows to full size. Text("Details go here.") .transition(.scale) } } } } ``` ================================================ FILE: example/appendix-a/demo1/README.md ================================================ 了解 Swift 和 SwiftUI 中的属性包装器 === SwiftUI 严重依赖属性包装器，以使我们的代码更易于阅读，编写和维护，但是如果您从未使用过它们，您可能会想知道所有 `@` 和 `$` 符号的来源 - 乍一看它们似乎很陌生。 尽管自从 `Swift 5.1` 引入属性包装器以来，它是 `Swift` 的一项常规功能，但它们在 `SwiftUI` 中尤为常见 -您 会看到 `@Published`，`@ObservedObject`，`@EnvironmentObject`等，所有这些都是为了减少模板的数量 在我们的代码中。 在接下来的几章中，我们将详细介绍每个 `SwiftUI` 的属性包装器，但只需简要介绍一下这些基础知识即可： - 一些属性包装器使我们可以获得原本不可能的效果，例如 `@State` 允许我们修改结构体中的属性的方式。 - 某些属性包装程序明确要求您在其他地方做额外的工作，如果未完成，则可能会使您的应用程序崩溃。 例如，`@FetchRequest`希望您提前将 `Core Data` 管理的对象上下文放入环境中。 - 您一次只能应用一个属性包装器，这意味着 `@ObservedObject @Binding var value = SomeClass()` 是不允许的。 - 即使某些属性包装看起来很相似（看着您，`@Environment` 和 `@EnvironmentObject`!），它们也有所不同，因此，请务必正确使用它们。 - 您可以根据需要创建自己的属性包装器，但这不是使用 SwiftUI 所必需的。 这涵盖了基础知识，但是要真正了解这些属性包装程序是如何工作的，有必要对它们进行逐一研究。 ================================================ FILE: 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"scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/appendix-a/demo10/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/appendix-a/demo10/Demo/Shared/Assets.xcassets/niagara-falls.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "avatar.png", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/appendix-a/demo10/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI struct ContentView: View { @GestureState var dragAmount = CGSize.zero var body: some View { Image("niagara-falls") .offset(dragAmount) .gesture( DragGesture().updating($dragAmount) { value, state, transaction in state = value.translation } ) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/appendix-a/demo10/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/appendix-a/demo10/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/appendix-a/demo10/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/appendix-a/demo10/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/appendix-a/demo10/README.md ================================================ 什么是 `@GestureState` 属性包装器？ === SwiftUI 为我们提供了一个用于跟踪手势状态的特定属性包装器，称为 `@GestureState`。 尽管您可以使用简单的 `@State` 属性包装器完成相同的操作，但 `@GestureState` 具有附加功能，即当手势结束时，它会自动将属性设置回其初始值，并且通常比使用简单的 `@State` 快得多 。 例如，我们可能想要创建一个可以拖动视图的手势。 为此，我们首先需要创建一个 `@GestureState` 属性，以存储视图已移动了多少，如下所示： ```swift @GestureState var dragAmount = CGSize.zero ``` 该参数的默认值为 `CGSize.zero`，这意味着手势结束时它将自动返回该值。 接下来，我们将附加一个 `offset()` 修饰符，以使我们的视图可以通过 `dragAmount` 中的任何值移动： ```swift Image("niagara-falls") .offset(dragAmount) ``` 最后，我们将绑定到我们的 `dragAmount` 属性的手势，如下所示： ```swift Image("niagara-falls") .offset(dragAmount) .gesture( DragGesture().updating($dragAmount) { value, state, transaction in state = value.translation } ) ``` 里面有很多代码，让我们逐步解释： - `DragGesture().updating()`代码创建一个新的拖动手势，要求它修改存储在 `dragAmount` 中的值-这就是我们的 `CGSize`。 - 它需要一个带有三个参数的闭包：`value`，`state` 和 `transaction`。 - `value` 参数是拖动的当前数据-拖动的开始位置，移动的距离，预计的结束位置等等。 - `state` 参数是一个inout值，这是我们的属性。因此，除了直接读取或写入 `dragAmount` 之外，我们还应该修改状态。 - `transaction` 参数是一个 `inout` 值，用于存储整个动画上下文，从而为我们提供了一些有关正在发生的情况的信息，例如，这是连续动画还是瞬态动画。连续动画可以通过拖动滑块来产生，而瞬态动画可以通过点击按钮来产生。 - 为了使我们的视图可拖动，我们要做的就是将当前转换直接分配给状态拖动（在这种情况下，它实际上是dragAmount），然后在 `offset()` 修饰符中使用它来移动视图。 请记住，`@GestureState` 的优点之一是，当手势结束时，它会自动将属性的值设置回其初始值。在这种情况下，这意味着我们可以在所需的所有位置上拖动视图，放开后，它将立即回到其原始位置。 ================================================ FILE: example/appendix-a/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { 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================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI import CoreData struct ContentView: View { @Environment(\.managedObjectContext) private var viewContext @FetchRequest( sortDescriptors: [NSSortDescriptor(keyPath: \User.name, ascending: true)], animation: .default) private var items: FetchedResults var body: some View { List { ForEach(items) { item in Text("Item at \(item.name ?? "-")") } .onDelete(perform: deleteItems) } .toolbar { #if os(iOS) EditButton() #endif Button(action: addItem) { Label("Add Item", systemImage: "plus") } Button(action: { deleteItems(offsets: [0]) }) { Label("Delete Item", systemImage: "minus") } } } private func addItem() { withAnimation { let newItem = User(context: viewContext) newItem.name = "Kenny Wong" do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } private func deleteItems(offsets: IndexSet) { withAnimation { offsets.map { items[$0] }.forEach(viewContext.delete) do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) } } ================================================ FILE: example/appendix-a/demo11/Demo/Shared/Demo.xcdatamodeld/.xccurrentversion ================================================ _XCCurrentVersionName Shared.xcdatamodel ================================================ FILE: example/appendix-a/demo11/Demo/Shared/Demo.xcdatamodeld/Shared.xcdatamodel/contents ================================================ ================================================ FILE: example/appendix-a/demo11/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { let persistenceController = PersistenceController.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } } } ================================================ FILE: example/appendix-a/demo11/Demo/Shared/Persistence.swift ================================================ // // Persistence.swift // Shared // // Created by 王楚江 on 2021/3/23. // import CoreData struct PersistenceController { static let shared = PersistenceController() static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext print("---->") for _ in 0..<10 { let newItem = User(context: viewContext) newItem.name = "Kenny" newItem.age = 18 } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() let container: NSPersistentContainer init(inMemory: Bool = false) { container = NSPersistentContainer(name: "Demo") if inMemory { container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device is locked. * The device is out of space. * The store could not be migrated to the current model version. Check the error message to determine what the actual problem was. */ fatalError("Unresolved error \(error), \(error.userInfo)") } }) } } ================================================ FILE: example/appendix-a/demo11/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/appendix-a/demo11/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/appendix-a/demo11/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/appendix-a/demo11/README.md ================================================ 什么是 `@FetchRequest` 属性包装器？ === SwiftUI 为我们提供了专用的属性包装器，用于处理 `Core Data` 提取请求，它使我们可以直接将数据嵌入到 `SwiftUI` 视图中，而无需编写额外的逻辑。 您必须为 `@FetchRequest` 提供至少两个值：要读取的实体，以及用于排列数据的任何排序描述符。 您还可以选择提供谓词以根据需要过滤数据。 重要提示：在使用 `@FetchRequest` 之前，您必须首先将 `Core Data` 托管对象上下文注入到环境中–有关如何执行此操作的说明，请参见如何从 `SwiftUI` 视图访问 `Core Data` 托管对象上下文。 作为一个基本示例，我们可以显示来自 `Core Data` 上下文的所有用户，如下所示： ```swift @FetchRequest( entity: User.entity(), sortDescriptors: [] ) var users: FetchedResults ``` 这不会对数据进行排序，因此将按照添加顺序返回用户。`@FetchRequest` 自动包含 `@ObservedObject`，因此，如果您在`List`，`ForEach`或类似文件中使用数据，则当基础数据发生更改时，它将自动刷新。 提示：我将 `@FetchRequest` 代码分成几行，以使其更易于阅读，但这不是必需的。 如果要对数据进行排序，请以键路径数组的形式提供排序描述符，如下所示： ```swift @FetchRequest( entity: User.entity(), sortDescriptors: [ NSSortDescriptor(keyPath: \User.name, ascending: false) ] ) var users: FetchedResults ``` 您可以根据需要提供任意数量的内容，它们将按顺序进行评估。 要同时添加 `predicate`，请使用以下格式创建 `NSPredicate`： ```swift @FetchRequest( entity: User.entity(), sortDescriptors: [ NSSortDescriptor(keyPath: \User.name, ascending: false), ], predicate: NSPredicate(format: "surname == %@", "Hudson") ) var users: FetchedResults ``` ================================================ FILE: example/appendix-a/demo12/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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Button("Log in") { // UserDefaults.standard.set("@twostraws", forKey: "username") username = "@twostraws" } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/appendix-a/demo12/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/appendix-a/demo12/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/appendix-a/demo12/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/appendix-a/demo12/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/appendix-a/demo12/README.md ================================================ 什么是 `@AppStorage` 属性包装器？ === SwiftUI 具有专用的属性包装程序，可用于从 `UserDefaults` 中读取值，当值更改时，该程序将自动重新调用视图的 `body` 属性。 也就是说，此包装器有效地监视 `UserDefaults` 中的键，并且如果该键更改，将刷新您的UI。 例如，这将监视 `UserDefaults` 中的 `username` 键，该键将在按下按钮时设置： ```swift struct ContentView: View { @AppStorage("username") var username: String = "Anonymous" var body: some View { VStack { Text("Welcome, \(username)!") Button("Log in") { username = "@twostraws" } } } } ``` 在上面更改 `username` 将导致新字符串立即写入 `UserDefaults`，同时还会更新视图。 如果我们使用了较旧的方法，那也将是正确的： ```swift UserDefaults.standard.set("@twostraws", forKey: "username") ``` `@AppStorage` 默认情况下将监视 `UserDefaults.standard`，但是如果您愿意，也可以使其监视特定的应用程序组，如下所示： ```swift @AppStorage("username", store: UserDefaults(suiteName: "group.com.hackingwithswift.unwrap")) var username: String = "Anonymous" ``` 重要：`@AppStorage` 将您的数据写入 `UserDefaults`，这不是安全存储。 因此，您不应使用 `@AppStorage` 保存任何个人数据，因为它相对容易提取。 ================================================ FILE: example/appendix-a/demo13/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D3B6F1C260A644F006AB2D3 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3B6F09260A644E006AB2D3 /* DemoApp.swift */; }; 7D3B6F1D260A644F006AB2D3 /* DemoApp.swift in Sources */ = {isa = 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example/appendix-a/demo13/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { @SceneStorage("text") var text = "" var body: some View { #if os(iOS) NavigationView { TextEditor(text: $text) } .navigationViewStyle(StackNavigationViewStyle()) #else NavigationView { TextEditor(text: $text) } #endif } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/appendix-a/demo13/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/appendix-a/demo13/Demo/iOS/Info.plist 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CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/appendix-a/demo13/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/appendix-a/demo13/README.md ================================================ 什么是 `@SceneStorage` 属性包装器？ === 如果您想为每个屏幕保存唯一的数据，则应使用 `SwiftUI` 的 `@SceneStorage` 属性包装器。 它的工作方式类似于 `@AppStorage`，为您提供了一个名称来保存内容以及一个默认值，但是它不是使用 `UserDefaults` 而是用于状态恢复 - 甚至可以与多种复杂的多场景一起使用 `iPadOS` 中我们经常看到的设置。 例如，如果您有一个文本编辑器并想存储用户输入的内容，则应使用以下代码： ```swift struct ContentView: View { @SceneStorage("text") var text = "" var body: some View { #if os(iOS) NavigationView { TextEditor(text: $text) } .navigationViewStyle(StackNavigationViewStyle()) #else NavigationView { TextEditor(text: $text) } #endif } } ``` 注意：我在此处使用了 `StackNavigationViewStyle`，因为它迫使 `iPad` 将所有空间分配给我们的文本编辑器。 因为它使用 `@SceneStorage`，所以 `SwiftUI` 将自动确保每个场景实例都有其自己的文本副本 – 如果同时运行应用程序，则两者都会正确保存和恢复其数据。 现在，在使用 `@SceneStorage` 之前，`Apple`有一些重要警告： - 不要保存大量数据； 保存状态恢复所需的一切。 - 永远不要将敏感数据存储在场景存储中，因为它不安全。 - 如果用户转到应用程序切换器并销毁了您的应用程序，则场景存储也将被销毁。 ================================================ FILE: example/appendix-a/demo14/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D3B6EF3260A6410006AB2D3 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3B6EE0260A640F006AB2D3 /* DemoApp.swift */; }; 7D3B6EF4260A6410006AB2D3 /* 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example/appendix-a/demo14/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { @ScaledMetric var imageSize: CGFloat = 100 var body: some View { Image(systemName: "cloud.sun.bolt.fill") .resizable() .frame(width: imageSize, height: imageSize) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/appendix-a/demo14/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/appendix-a/demo14/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion 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$(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/appendix-a/demo14/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/appendix-a/demo14/README.md ================================================ 什么是 `@ScaledMetric` 属性包装器？ === SwiftUI 为我们提供了 `@ScaledMetric` 属性包装器，以定义应根据用户的动态类型设置自动缩放的数字。 在最基本的用法中，为您的属性提供默认值，然后 `@ScaledMetric` 将完成其余工作。 例如，这将根据用户的设置以不同的大小绘制同一张图片： ```swift struct ContentView: View { @ScaledMetric var imageSize: CGFloat = 100 var body: some View { Image(systemName: "cloud.sun.bolt.fill") .resizable() .frame(width: imageSize, height: imageSize) } } ``` 如果需要缩放以与其他特定文本匹配，则可以为属性包装器使用 `relativeTo` 参数，该参数可让您指定要匹配的字体大小。 例如，这将与较大的标题一起缩放： ```swift @ScaledMetric(relativeTo: .largeTitle) var imageSize: CGFloat = 100 ``` ================================================ FILE: example/appendix-a/demo15/README.md ================================================ 什么是 `@UIApplicationDelegateAdaptor` 属性包装器？ === 如果需要访问 `SwiftUI` 中的 `AppDelegate` 功能，则应创建一个继承自 `NSObject` 和 `UIApplicationDelegate` 的类，并为其提供所需的任何功能，例如： ```swift class AppDelegate: NSObject, UIApplicationDelegate { // add app delegate methods here } ``` 例如，如果您想实现旧的 `didFinishLaunchingWithOptions` 方法，则可以使用以下方法： ```swift class AppDelegate: NSObject, UIApplicationDelegate { func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool { print("Your code here") return true } } ``` 一旦有了，在主应用程序中使用 `UIApplicationDelegateAdaptor` 属性包装器，以便 `SwiftUI` 知道创建和管理您的应用程序委托类： ```swift @main struct NewIn14App: App { @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate var body: some Scene { WindowGroup { ContentView() } } } ``` ================================================ FILE: example/appendix-a/demo2/README.md ================================================ 所有 SwiftUI 属性包装器都进行了解释和比较 === SwiftUI 为我们的应用程序提供了 `17` 个属性包装器，每个属性包装器都提供不同的功能。知道使用哪个以及何时使用对正确处理至关重要，因此在本文中，我将向您介绍其中的每一个，并为您提供明确的使用指南。 ## TL;DR 我将在稍后解释更多，但这是 `too long; didn’t read` 摘要，大致描述了每个包装程序的工作，是否拥有数据（即数据是否属于它并由它管理）以及指向更多内容的链接： - `@AppStorage` 从 `UserDefaults` 读取和写入值。这拥有其数据。[更多信息](../demo12/README.md)。 - `@Binding` 引用另一个视图拥有的值类型数据。在本地更改绑定也会更改远程数据。这不拥有其数据。[更多信息](../demo9/README.md)。 - `@Environment` 允许我们从系统读取数据，例如配色方案，可访问性选项和特征集，但是如果需要，您可以在此处添加自己的密钥。这不拥有其数据。[更多信息](../demo8/README.md)。 - `@EnvironmentObject` 读取我们放入环境中的共享对象。这不拥有其数据。[更多信息](../demo7/README.md)。 - `@FetchRequest` 为特定实体启动核心数据获取请求。这拥有其数据。[更多信息](../demo11/README.md)。 - `@FocusedBinding` 旨在监视键窗口中的值，例如当前选定的文本字段。这不拥有其数据。 - `@FocusedValue` 是 `@FocusedBinding` 的简单版本，不会为您解开绑定值。这不拥有其数据。 - `@GestureState` 存储与当前正在进行的手势关联的值，例如您滑动了多远，除非在手势停止时它将重置为其默认值。这拥有其数据。[更多信息](../demo10/README.md)。 - `@Namespace` 创建一个动画名称空间，以允许匹配的几何效果，该效果可以由其他视图共享。这拥有其数据。 - `@NSApplicationDelegateAdaptor` 用于创建类并将其注册为 `macOS` 应用程序的应用程序委托。这拥有其数据。 - `@ObservedObject` 引用符合 `ObservableObject` 协议的外部类的实例。这不拥有其数据。[更多信息](../demo6/README.md)。 - `@Published` 附加到 `ObservableObject` 内的属性，并告诉 SwiftUI 它应该在更改此属性时刷新使用此属性的所有视图。这拥有其数据。[更多信息](../demo5/README.md)。 - `@ScaledMetric` 会读取用户的动态类型设置，并根据您提供的原始值向上或向下缩放数字。这拥有其数据。[更多信息](../demo14/README.md)。 - `@SceneStorage` 使我们可以保存和还原少量数据以进行状态还原。这拥有其数据。[更多信息](../demo13/README.md)。 - `@State` 允许我们在视图本地操作少量的值类型数据。这拥有其数据。[更多信息](../demo3/README.md)。 - `@StateObject` 用于存储符合 `ObservableObject` 协议的引用类型数据的新实例。这拥有其数据。[更多信息](../demo4/README.md)。 - `@UIApplicationDelegateAdaptor` 用于创建一个类并将其注册为iOS应用程序的应用程序委托。这拥有其数据。[更多信息](../demo15/README.md)。 ## 存储临时数据 在将数据存储到应用程序中时，最简单的属性包装器是`@State`。它旨在存储视图本地使用的值类型，因此非常适合存储整数，布尔值，甚至存储结构的本地实例。 相比之下，`@Binding`用于要更改的简单数据，但不属于您的视图。例如，考虑一下内置的 `Toggle` 开关是如何工作的：它需要在打开和关闭状态之间移动，但是它不想自己存储该值，因此它绑定了我们拥有的某个外部值。因此，我们的视图具有`@State`属性，而 `Toggle` 具有`@Binding`属性。 `@State`有一个称为`@GestureState`的变体，专门用于跟踪活动手势。这种用法很少使用，但是它的好处是，手势结束后，您可以将其属性设置回其初始值。 为了更高级的目的（即处理类或在许多地方共享数据），您不应使用`@State`和`@Binding`。相反，您应该使用`@StateObject` 在某个位置创建对象，然后将其与`@ObservedObject`在其他视图中使用。 一个简单的规则是：如果在属性包装器的名称中看到 `state`，则意味着视图绝对拥有数据。 因此，`@State`表示在本地创建和管理的简单值类型数据，但可能使用`@Binding`在其他地方共享，`@StateObject`表示在本地创建和管理的引用类型数据，但可能在其他地方使用`@ObservedObject`之类共享。 这很重要：如果您看到`@ObservedObject var something = SomeType()` ，那么几乎应该肯定是`@StateObject`，以便 `SwiftUI` 知道视图应该拥有数据，而不仅仅是在其他地方引用它。在这里使用 `@ObservedObject` 有时会导致您的应用程序崩溃，因为该对象被过早破坏了。 如果您发现自己从一个视图到另一个视图处理相同的数据，则会发现 `@EnvironmentObject` 属性包装器很有用。这使您可以从共享环境中读取引用类型对象，而不是显式传递它。 就像 `@ObservableObject` 一样，`@EnvironmentObject` 最初不应该用于创建对象。而是在另一个视图中创建它，并使用 `environmentObject()` 修饰符将其注入到环境中。尽管环境会自动保留对象的所有权，但是您也可以使用 `@StateObject` 将其存储在最初创建的位置。但是，这不是必需的：将对象放入环境中足以使它保持活动状态，而无需进一步的所有权。 最终的基于状态的属性包装器是 `@Published`，它在引用类型内部用于注释属性。标记为 `@Published` 的任何属性都将导致其父类宣布发生了更改，这又将导致任何观察该对象的视图进行所需的任何更改。 ## 存储长期数据 SwiftUI具有三个用于存储和/或检索数据的属性包装器。 第一个是 `@AppStorage`，它是 `UserDefaults` 的包装。每次您从应用存储中读取或写入值时，实际上就是在从 `UserDefaults` 中读取或写入值。 第二个是 `@SceneStorage`，它是 `Apple` 状态恢复API的包装。状态恢复允许关闭和重新加载应用程序，并使其恢复到用户停止使用的相同状态-使得我们的应用程序始终处于运行状态，即使它们已被静默终止。 `@AppStorage` 和 `@SceneStorage`不安全，不应用于存储敏感数据。 尽管`@AppStorage`和 `@SceneStorage` 听起来一样，但它们却不一样：`@AppStorage`为整个应用程序存储一个值，而` `会在用户多次打开您的应用程序窗口时自动为同一数据保存多个值 – 考虑一下 `iPadOS` 和 `macOS` 。 因此，您可以使用`@AppStorage`存储全局值，例如“用户的最高分数是多少？”，并且可以使用 `@SceneStorage` 存储“用户现在正在阅读的页面是什么？” 第三个数据属性包装器是 `@FetchRequest`，用于从 `Core Data` 检索信息。这将自动使用环境中的任何托管对象上下文，并在基础数据发生更改时自动更新。 ## 读取环境数据 SwiftUI 具有两个用于读取用户环境的属性包装器：`@Environment` 和 `@ScaledMetric`。 `@Environment`用于读取各种数据，例如当前正在启用哪些特征收集，是否使用2x或3x屏幕，处于什么时区等等。 它还具有一些特殊的应用程序操作，例如导出文件和在系统注册的 Web浏览器中打开 URL。 `@ScaledMetric` 更为简单，它使我们能够根据用户的动态类型设置来调整用户界面的大小。 例如，使用系统默认大小，100x100点的盒子可能看起来不错，但是使用 `@ScaledMetric` 时，启用较大的 `Dynamic Type` 设置时，它会自动变为200x200。 ## 引用视图 SwiftUI 提供了 `@Namespace` 属性包装器，该包装器为动画创建了一个新的命名空间。动画名称空间让我们说“动画ID为5的视图”，并且该名称空间中ID为5的所有视图都将被动画化。 您可以使用属性类型 `Namespace.ID` 并从创建视图的任何视图中注入 `@Namespace` 值，从而在视图之间共享名称空间。 这使您可以跨视图创建匹配的几何效果动画，而不是将所有数据存储在当前视图中。 ## 申请处理 如果您需要访问旧的 `UIApplicationDelegate` 和 `NSApplicationDelegate`方法和通知，则应分别使用`@UIApplicationDelegateAdaptor` 和 `@NSApplicationDelegateAdaptor`属性包装器。 您为它们提供应用程序委托的类，它们将确保创建实例并发送所有适当的通知。 ## 真理之源 早些时候，我描述了哪些属性包装器拥有它们的数据，而实际上这涉及到您的应用程序中的真理来源：拥有它们的数据的包装器是真理的源头，因为它们创建和管理值，而没有拥有数据的包装器不是源头。 的确如此，因为他们从其他地方获得了价值。 财产包装是真理的源头 这些直接创建和管理值： - `@AppStorage` - `@FetchRequest` - `@GestureState` - `@Namespace` - `@NSApplicationDelegateAdaptor` - `@Published` - `@ScaledMetric` - `@SceneStorage` - `@State` - `@StateObject` - `@UIApplicationDelegateAdaptor` 不是事实来源的属性包装器 这些是从其他地方获取价值的： - `@Binding` - `@Environment` - `@EnvironmentObject` - `@FocusedBinding` - `@FocusedValue` - `@ObservedObject` 如果您什么都不记得了... 我想创建一个由当前视图拥有的新属性。 您应该将 `@State` 用作值类型，并将 `@StateObject` 用作引用类型。 我想引用在其他地方创建的值。 您应该将 `@Binding` 用于值类型，并将 `@ObservedObject`或 `@EnvironmentObject` 用于引用类型。 ================================================ FILE: example/appendix-a/demo3/README.md ================================================ 什么是 `@State` 属性包装器？ === SwiftUI 使用 `@State` 属性包装器允许我们修改结构体中的值，由于结构体是值类型，通常不允许这样做。 当我们将 `@State` 放在属性之前时，我们有效地将其存储从结构中移出，并移到 `SwiftUI` 管理的共享存储中。 这意味着SwiftUI可以在需要时销毁并重新创建我们的结构（这可能会发生很多！），而不会丢失其存储的状态。 `@State` 应该与简单的结构类型（例如`String`，`Int`和数组）一起使用，并且通常不应与其他视图共享。 如果要在视图之间共享值，则可能应该使用 `@ObservedObject` 或 `@EnvironmentObject` - 两者都将确保在数据更改时刷新所有视图。 为了增强 `@State` 属性的本地性，`Apple` 建议您将其标记为私有，如下所示： ```swift @State private var username = "" ``` 这不是必需的，但似乎是明智的做法。 提示：如果需要，您可以使用 `@State` 跟踪引用类型，只是在引用类型更改时不会收到通知。 这对于不符合 `ObservableObject` 协议的类特别有用。 ================================================ FILE: example/appendix-a/demo4/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; 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example/appendix-a/demo4/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/appendix-a/demo4/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI class User: ObservableObject { var username = "kenny" } struct ContentView: View { @StateObject var user = User() var body: some View { Text("Hello, world! \(user.username)") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/appendix-a/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { 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================================================ FILE: example/appendix-a/demo4/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/appendix-a/demo4/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/appendix-a/demo4/README.md ================================================ 什么是 `@StateObject` 属性包装器？ === SwiftUI 的 `@StateObject` 属性包装器旨在填补状态管理中的一个非常具体的空白：当您需要在其中一个视图中创建引用类型并确保该类型在该视图以及与之共享的其他视图中仍然有效时，就可以使用。 例如，考虑一个简单的 `User` 类，例如： ```swift class User: ObservableObject { var username = "@twostraws" } ``` 如果要在各种视图中使用它，则需要在 `SwiftUI` 外部创建它并将其注入，或者在其中一个 `SwiftUI` 视图中创建它并使用 `@StateObject`，如下所示： ```swift struct ContentView: View { @StateObject var user = User() var body: some View { Text("Username: \(user.username)") } } ``` 这将确保视图更新时不会破坏 `User` 实例。 以前，您可能曾经使用 `@ObservedObject` 来获得相同的结果，但这很危险–有时且仅在某些情况下，`@ObservedObject` 可能会意外释放其存储的对象，因为它并不是被设计为最终的真理来源。 目的。 `@StateObject` 不会发生这种情况，因此您应该改用它。 重要说明：每个对象只能使用 `@StateObject` 一次，无论在哪个视图中创建对象都应使用 `@StateObject`。 共享对象的所有其他视图应使用`@ObservedObject`。 ================================================ FILE: example/appendix-a/demo5/README.md ================================================ 什么是 `@Published` 属性包装器？ === `@Published` 是 `SwiftUI` 中最有用的属性包装器之一，它使我们能够创建可观察的对象，这些对象会在发生更改时自动宣布。 `SwiftUI` 将自动监视此类更改，并重新调用所有依赖于数据的视图的 `body` 属性。 实际上，这意味着只要更改带有标记为 `@Published` 的属性的对象，就会重新加载使用该对象的所有视图以反映这些更改。 例如，如果我们有一个这样的可观察对象： ```swift class Bag: ObservableObject { var items = [String]() } ``` 这符合 `ObservableObject` 协议，这意味着 `SwiftUI` 的视图可以监视它的更改。 但是，由于它的唯一属性未标记为 `@Published`，因此不会发送任何更改通知-您可以将项目自由添加到数组中，而视图也不会更新。 如果您希望每当添加或删除项目时都发送变更公告，则可以使用 `@Published` 进行标记，如下所示： ```swift class Bag: ObservableObject { @Published var items = [String]() } ``` 您无需执行其他任何操作 - `@Published` 属性包装器可以有效地将 `willSet` 属性观察者添加到项目中，这样任何更改都会自动发送给观察者。 如您所见，`@Published` 是选择加入的–您需要列出应该引起公告的属性，因为默认情况下，更改不会导致重新加载。 这意味着您可以拥有存储缓存的属性，供内部使用的属性等，并且它们不会强制 `SwiftUI` 在更改视图时重新加载视图，除非您用 `@Published` 专门标记它们。 ================================================ FILE: example/appendix-a/demo6/README.md ================================================ 什么是 `@ObservedObject` 属性包装器？ === SwiftUI 为我们提供了 `@ObservedObject` 属性包装器，以便视图可以监视外部对象的状态，并在重要内容发生变化时得到通知。 它的行为与 `@StateObject` 相似，不同之处在于它不得用于创建对象–仅将 `@ObservableObject` 与在其他位置创建的对象一起使用，否则 SwiftUI 可能会意外破坏该对象。 例如，我们可能会使用以下内容： ```swift class Order: ObservableObject { @Published var items = [String]() } struct ContentView: View { @ObservedObject var order: Order var body: some View { // your code here } } ``` 该 `Order` 类使用 `@Published`，因此它将在项目更改时自动发送更改公告，而 `ContentView` 使用 `@ObservedObject` 来监视那些公告。如果没有 `@ObservedObject`，则更改通知将被发送但被忽略。 尽管这看起来很简单，但值得深入探讨一些细节。 首先，用 `@ObservedObject` 标记的任何类型都必须符合 `ObservableObject` 协议，这反过来意味着它必须是类而不是结构。这不是可选的 – `SwiftUI` 要求我们在此处使用一个类。 其次，观察到的对象是专门为视图外部的数据设计的，这意味着它们可能在多个视图之间共享。 `@ObservedObject` 属性包装器将自动确保密切监视该属性，以便重要的更改将重新使用该视图加载任何视图。这也意味着必须在其他位置创建数据，然后将其发送到您的视图中。 第三，并不是观察对象中的所有属性都会导致视图刷新-您需要使用@Published或自定义公告来决定哪些属性应发送更改通知。为符合 `ObservableObject` 的类型提供默认的 `objectWillChange` 发布者，以便根据需要进行自定义声明。 ================================================ FILE: example/appendix-a/demo7/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DEA7DD62609E13E00EA5E6F /* DemoApp.swift in 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/appendix-a/demo7/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI struct PlayerNameView: View { @ObservedObject var order: Order var body: some View { Text("Hello, \(order.items[0])!") } } class Order: ObservableObject { @Published var items = [String](["111"]) } struct ContentView: View { @EnvironmentObject var order: Order var body: some View { VStack { Button("Increase Score") { // print(order) // order.items = ["sss"] // order.items.append("test") // progress.score += 1 } } .padding(10) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/appendix-a/demo7/Demo/Shared/DemoApp.swift 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example/appendix-a/demo7/README.md ================================================ 什么是 `@EnvironmentObject` 属性包装器？ === SwiftUI 的 `@EnvironmentObject` 属性包装器使我们可以创建依赖共享数据的视图，这些视图通常跨整个 `SwiftUI` 应用程序。 例如，如果创建一个将在应用程序的许多部分之间共享的用户，则应使用 `@EnvironmentObject`。 例如，我们可能有一个像这样的 `Order` 类： ```swift class Order: ObservableObject { @Published var items = [String]() } ``` 这符合 `ObservableObject`，这意味着我们可以将其与 `@ObservedObject` 或 `@EnvironmentObject` 一起使用。 在这种情况下，我们可以创建一个将其与 `@EnvironmentObject` 一起使用的视图，如下所示： ```swift struct ContentView: View { @EnvironmentObject var order: Order var body: some View { // your code here } } ``` 请注意， `order` 属性没有给定默认值 - 通过使用 `@EnvironmentObject` ，我们表明该值将由 `SwiftUI` 环境提供，而不是由此视图显式创建。 `@EnvironmentObject` 与 `@ObservedObject` 有很多共同点：两者都必须引用符合 `ObservableObject` 的类，都可以在许多视图之间共享，并且都可以在发生重大更改时更新正在监视的所有视图。 但是，`@EnvironmentObject` 明确表示“此对象将由某个外部实体提供，而不是由当前视图创建或专门传递。 实际上，假设您是否拥有 `视图A`，并且`视图A`拥有`视图E`所需的一些数据。使用 `@ObservedObject`，`视图A`需要将对象传递给`视图B`，然后将其传递给`视图C`，然后传递给`视图D`，最后传递给`视图E` – 所有中间视图都需要发送给对象，即使它们实际上并没有需要它。 使用 `@EnvironmentObject` 时，`视图A`可以创建一个对象并将其放置到环境中。然后，只要需要，它内的任何视图都可以访问该环境对象，而不必显式传递它 – 这使我们的代码更加简单。 警告：显示使用 `@EnvironmentObject` 的视图时，`SwiftUI` 将立即在环境中搜索正确类型的对象。如果找不到此类对象（即，如果您忘记将其放置在环境中），则您的应用将立即崩溃。当使用 `@EnvironmentObject` 时，可以有效地保证对象在需要时会存在于环境中，这有点像使用隐式解包的可选对象。 ================================================ FILE: example/appendix-a/demo8/README.md ================================================ 什么是 `@Environment` 属性包装器？ === SwiftUI 给我们提供了 `@Environment` 和 `@EnvironmentObject` 属性包装器，但是它们有些微的不同：`@EnvironmentObject` 允许我们向环境中注入任意值，而 `@Environment` 专门用于处理 SwiftUI 自己的预定义键。 例如，`@Environment` 非常适合读取诸如 `Core Data` 受管对象上下文之类的信息，设备是处于暗模式还是亮模式，使用何种尺寸类渲染视图以及更多–来自系统的固定属性 。 在代码中，它看起来像这样： ```swift @Environment(\.horizontalSizeClass) var horizontalSizeClass @Environment(\.managedObjectContext) var managedObjectContext ``` 另一方面，`@EnvironmentObject` 设计用于从环境中读取任意对象，如下所示： ```swift @EnvironmentObject var order: Order ``` 这种差异听起来很小，但由于实现 `@EnvironmentObject` 的方式而非常重要。 当我们说 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struct AddView: View { @Binding var isPresented: Bool var body: some View { Button("Dismiss") { isPresented = false } } } struct ContentView: View { @State private var showingAddUser = false var body: some View { VStack { Button("Showing Page") { showingAddUser = true } } .padding(50) .sheet(isPresented: $showingAddUser) { AddView(isPresented: $showingAddUser) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/appendix-a/demo9/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/appendix-a/demo9/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/appendix-a/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/appendix-a/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/appendix-a/demo9/README.md ================================================ 什么是 `@Binding` 属性包装器？ === `@Binding` 让我们声明一个值实际上来自其他地方，并且应该在两个地方共享。 这与 `@ObservedObject` 或 `@EnvironmentObject` 不同，这两个对象都是为在可能的许多视图之间共享引用类型而设计的。 例如，我们可能有一个带有 `@State` 属性的 `ContentView`，该属性存储是否显示子视图，如下所示： ```swift struct ContentView: View { @State private var showingAddUser = false var body: some View { VStack { // your code here } } .sheet(isPresented: $showingAddUser) { // show the add user view } } ``` 它使用 `showingAddUser` 作为工作表的 `isPresented` 参数，这意味着当该布尔值变为 `true` 时，将显示添加用户视图。 但是，如果需要，我们如何才能允许添加用户视图自行关闭-例如，如果用户点击“完成”按钮？ 我们想要发生的是，将添加用户视图的 `showingAddUser` 设置回 `false`，这将导致 `ContentView` 将其隐藏。 这正是 `@Binding` 的目的：它使我们可以在添加用户视图中创建一个属性，该属性表示“此值将从其他地方提供，并将在我们与其他地方之间共享”。 因此，我们可以创建一个添加用户视图，如下所示： ```swift struct AddView: View { @Binding var isPresented: Bool var body: some View { Button("Dismiss") { isPresented = false } } } ``` 该属性的字面意思是“我有一个名为 isPresented 的布尔值，但它存储在其他位置。” 因此，当我们创建该 `AddView` 来替换 `// show the add user view`，我们需要提供该值以便可以对其进行操作： ```swift .sheet(isPresented: $showingAddUser) { AddView(isPresented: $showingAddUser) } ``` 这使 `ContentView` 和 `AddView` 可以共享相同的布尔值 - 当它在一个位置更改时，它在另一个位置也更改。 ================================================ FILE: example/cheat-sheet.md ================================================ SwiftUI 速查手册 ===
SwiftUI 与 UIKit 效果一致 | UIKit | [SwiftUI](https://developer.apple.com/xcode/swiftui/) | | ----------- | ----------- | | UILabel | [Text](#text-文本) & [Label](#label)| | UIImageView | [Image](#image-图片) | | UITextField | [TextField](#textfield-输入框) / [SecureField](#securefield-密码输入框) | | UITextView | [TextEditor](#texteditor-多行可滚动文本编辑器) | | UISwitch | [Toggle](#toggle-开关选择器) | | UISlider | [Slider](#slider-滑动输入条) | | UIButton | [Button](#button-按钮控件) | | UITableView | [List](#list-列表) | | UICollectionView | [LazyVGrid](#lazyvgrid) / [LazyHGrid](#lazyhgrid) | | UINavigationController | [NavigationView](#navigationview) | | UITabBarController | [TabView](#tabview) | | UIAlertController with style .alert | [Alert](#alert) | | UIAlertController with style .actionSheet | [ActionSheet](#actionsheet) | | UIStackView with horizontal axis| [HStack](#hstack) / [LazyHStack](#lazyhstack) | | UIStackView with vertical axis| [VStack](#vstack) / [LazyVStack](#lazyvstack) | | Aligning them in both axes. | [ZStack](#zstack) | | UISegmentedControl | [Picker](#picker-选择控件) | | UIStepper | [Stepper](#stepper-执行语义递增和递减操作的控件) | | UIDatePicker | [DatePicker](#datepicker-日期控件) | | NSAttributedString | No equivalent (use [Text](#text-文本)) | | MapKit | [Map](#map-地图界面的视图) | | UIProgressView | [ProgressView](#progressview-进度视图) | | - | [Modal](#modal) | | - | [ScrollView](#scrollview-滚动视图) | | - | [Form](#form) | | - | [Spacer](#spacer) | | - | [Divider](#divider) |
## View ### Text 文本 ```swift Text("Hello World") ``` 添加样式 ```swift Text("Hello World") .font(.largeTitle) .foregroundColor(Color.green) .lineSpacing(50) .lineLimit(nil) .padding() ``` 在文本视图中格式化文本 ```swift static let dateFormatter: DateFormatter = { let formatter = DateFormatter() formatter.dateStyle = .long return formatter }() var now = Date() var body: some View { Text("Task due date: \(now, formatter: Self.dateFormatter)") } ``` ### Label 可以使用以下代码行在文本旁边设置图标。 ```swift Label("SwiftUI CheatSheet", systemImage: "up.icloud") ``` 可以设置URL，单击后将重定向到浏览器。 ```swift Link("Click me", destination: URL(string: "your_url")!) ``` Documentation - [Label](https://developer.apple.com/documentation/swiftui/label) ### TextEditor 多行可滚动文本编辑器 可以显示和编辑长格式文本的视图。 ```swift @State private var fullText: String = "This is some editable text..." var body: some View { TextEditor(text: $fullText) } ``` 设置 `TextEditor` 背景颜色 ```swift extension NSTextView { open override var frame: CGRect { didSet { backgroundColor = .clear // drawsBackground = true } } } struct DetailContent: View { @State private var profileText: String = "Enter your bio" var body: some View { VSplitView(){ TextEditor(text: $profileText) .background(Color.red) } } } ``` Documentation - [TextEditor](https://developer.apple.com/documentation/swiftui/texteditor) ### TextField 输入框 显示可编辑文本界面的控件。 ```swift @State var name: String = "John" var body: some View { TextField("Name's placeholder", text: $name) .textFieldStyle(RoundedBorderTextFieldStyle()) .padding() } ``` 取消编辑框焦点样式。 ```swift extension NSTextField { // << workaround !!! open override var focusRingType: NSFocusRingType { get { .none } set { } } } ``` 如何居中放置 `TextField` 的文本 ```swift struct ContentView: View { @State var text: String = "TextField Text" var body: some View { TextField("Placeholder Text", text: $text) .padding(.all, 20) .multilineTextAlignment(.center) } } ``` Documentation - [TextField](https://developer.apple.com/documentation/swiftui/textfield) ### Image 图片 显示与环境相关的图像的视图。 ```swift Image("foo") // 图像名称是foo ``` 我们可以使用新的 `SF Symbols` ```swift Image(systemName: "clock.fill") ``` 您可以向系统图标集添加样式以匹配您使用的字体 ```swift Image(systemName: "cloud.heavyrain.fill") .foregroundColor(.red) .font(.title) Image(systemName: "clock") .foregroundColor(.red) .font(Font.system(.largeTitle).bold()) ``` 为图像添加样式 ```swift Image("foo") .resizable() // 它将调整大小，以便填充所有可用空间 .aspectRatio(contentMode: .fit) ``` Documentation - [Image](https://developer.apple.com/documentation/swiftui/image) ### SecureField 密码输入框 用户安全地输入私人文本的控件。 ```swift @State var password: String = "1234" var body: some View { SecureField($password) .textFieldStyle(RoundedBorderTextFieldStyle()) .padding() } ``` Documentation - [SecureField](https://developer.apple.com/documentation/swiftui/securefield) ### Toggle 开关选择器 在打开和关闭状态之间切换的控件。 ```swift @State var isShowing = true // toggle state Toggle(isOn: $isShowing) { Text("Hello World") } ``` 如果您的 `Toggle` 的标签只有 `Text`，则可以使用此更简单的签名进行初始化。 ```swift Toggle("Hello World", isOn: $isShowing) ``` Documentation - [Toggle](https://developer.apple.com/documentation/swiftui/toggle) ### Slider 滑动输入条 用于从值的有界线性范围中选择一个值的控件。 ```swift @State var progress: Float = 0 Slider(value: $progress, from: 0.0, through: 100.0, by: 5.0) ``` 滑块缺少 `minimumValueImage` 和 `maximumValueImage`，但是我们可以通过 `HStack` 轻松地复制它 ```swift @State var progress: Float = 0 HStack { Image(systemName: "sun.min") Slider(value: $progress, from: 0.0, through: 100.0, by: 5.0) Image(systemName: "sun.max.fill") }.padding() ``` Documentation - [Slider](https://developer.apple.com/documentation/swiftui/slider) ### Button 按钮控件 在触发时执行操作的控件。 ```swift Button( action: { print("did tap") }, label: { Text("Click Me") } ) ``` 如果 `Button` 的标签仅为 `Text`，则可以使用此更简单的签名进行初始化。 ```swift Button("Click Me") { print("did tap") } ``` 您可以通过此按钮了解一下 ```swift Button(action: { // 退出应用 NSApplication.shared.terminate(self) }, label: { Image(systemName: "clock") Text("Click Me") Text("Subtitle") }) .foregroundColor(Color.white) .padding() .background(Color.blue) .cornerRadius(5) ``` Documentation - [Button](https://developer.apple.com/documentation/swiftui/button) ### Picker 选择控件 用于从一组互斥值中进行选择的控件。 选择器样式的更改基于其祖先，在 `Form` 或 `List` 下，它显示为单个列表行，您可以点击以进入一个显示所有可能选项的新屏幕。 ```swift NavigationView { Form { Section { Picker(selection: $selection, label: Text("Picker Name") , content: { Text("Value 1").tag(0) Text("Value 2").tag(1) Text("Value 3").tag(2) Text("Value 4").tag(3) }) } } } ``` 您可以使用 `.pickerStyle(WheelPickerStyle())` 覆盖样式。 在 `SwiftUI` 中，`UISegmentedControl` 只是 `Picker`的另一种样式。 ```swift @State var mapChoioce = 0 var settings = ["Map", "Transit", "Satellite"] Picker("Options", selection: $mapChoioce) { ForEach(0 ..< settings.count) { index in Text(self.settings[index]) .tag(index) } }.pickerStyle(SegmentedPickerStyle()) ``` 分段控制(SegmentedControl)在 `iOS 13` 中也焕然一新 Documentation - [Picker](https://developer.apple.com/documentation/swiftui/picker) ### Stepper 执行语义递增和递减操作的控件 用于执行语义递增和递减操作的控件。 ```swift @State var quantity: Int = 0 Stepper(value: $quantity, in: 0...10, label: { Text("Quantity \(quantity)")}) ``` 如果 `Stepper` 的标签只有 `Text`，则可以使用此更简单的签名进行初始化。 ```swift Stepper("Quantity \(quantity)", value: $quantity, in: 0...10) ``` 如果要完全控制，他们可以提供裸机步进器，您可以在其中管理自己的数据源。 ```swift @State var quantity: Int = 0 Stepper(onIncrement: { self.quantity += 1 }, onDecrement: { self.quantity -= 1 }, label: { Text("Quantity \(quantity)") }) ``` 如果您还为带有 `step` 的初始化程序的每个步骤指定了一个值的数量。 ```swift Stepper(value: $quantity, in: 0...10, step: 2) { Text("Quantity \(quantity)") } ``` Documentation - [Stepper](https://developer.apple.com/documentation/swiftui/stepper) ### DatePicker 日期控件 日期选择器(DatePicker)的样式也会根据其祖先而改变。 在 `Form` 或 `List` 下，它显示为单个列表行，您可以点击以展开到日期选择器（就像日历应用程序一样）。 ```swift @State var selectedDate = Date() var dateClosedRange: ClosedRange { let min = Calendar.current.date(byAdding: .day, value: -1, to: Date())! let max = Calendar.current.date(byAdding: .day, value: 1, to: Date())! return min...max } NavigationView { Form { Section { DatePicker( selection: $selectedDate, in: dateClosedRange, displayedComponents: .date, label: { Text("Due Date") } ) } } } ``` 在表格和列表的外部，它显示为普通的轮式拾取器 ```swift @State var selectedDate = Date() var dateClosedRange: ClosedRange { let min = Calendar.current.date(byAdding: .day, value: -1, to: Date())! let max = Calendar.current.date(byAdding: .day, value: 1, to: Date())! return min...max } DatePicker( selection: $selectedDate, in: dateClosedRange, displayedComponents: [.hourAndMinute, .date], label: { Text("Due Date") } ) ``` 如果 `DatePicker` 的标签仅是纯文本，则可以使用此更简单的签名进行初始化。 ```swift DatePicker("Due Date", selection: $selectedDate, in: dateClosedRange, displayedComponents: [.hourAndMinute, .date]) ``` 可以使用 `ClosedRange`，`PartialRangeThrough` 和 `PartialRangeFrom` 来设置 `minimumDate` 和 `maximumDate`。 ```swift DatePicker("Minimum Date", selection: $selectedDate, in: Date()..., displayedComponents: [.date]) DatePicker("Maximum Date", selection: $selectedDate, in: ...Date(), displayedComponents: [.date]) ``` Documentation - [DatePicker](https://developer.apple.com/documentation/swiftui/datepicker) ### Map 地图界面的视图 显示指定区域的地图 ```swift import MapKit @State var region = MKCoordinateRegion(center: .init(latitude: 37.334722, longitude: -122.008889), latitudinalMeters: 300, longitudinalMeters: 300) Map(coordinateRegion: $region) ``` 您可以通过指定 `interactionModes`（使用`[]`禁用所有交互）来控制地图的交互。 ```swift struct PinItem: Identifiable { let id = UUID() let coordinate: CLLocationCoordinate2D } Map(coordinateRegion: $region, interactionModes: [], showsUserLocation: true, userTrackingMode: nil, annotationItems: [PinItem(coordinate: .init(latitude: 37.334722, longitude: -122.008889))]) { item in MapMarker(coordinate: item.coordinate) } ``` Documentation - [Map](https://developer.apple.com/documentation/mapkit/map) ### ProgressView 进度视图 显示任务完成进度的视图。 ```swift @State private var progress = 0.5 VStack { ProgressView(value: progress) Button("More", action: { progress += 0.05 }) } ``` 通过应用 `CircularProgressViewStyle`，可以将其用作 `UIActivityIndicatorView`。 ```swift ProgressView(value: progress) .progressViewStyle(CircularProgressViewStyle()) ``` Documentation - [ProgressView](https://developer.apple.com/documentation/swiftui/progressview) ## 查看布局和演示 ### HStack 将其子级排列在一条水平线上的视图。 创建静态可滚动列表 ```swift HStack (alignment: .center, spacing: 20){ Text("Hello") Divider() Text("World") } ``` Documentation - [HStack](https://developer.apple.com/documentation/swiftui/hstack) ### LazyHStack 将子项排列在水平增长的线中的视图，仅在需要时创建项。 ```swift ScrollView(.horizontal) { LazyHStack(alignment: .center, spacing: 20) { ForEach(1...100, id: \.self) { Text("Column \($0)") } } } ``` Documentation - [LazyHStack](https://developer.apple.com/documentation/swiftui/lazyhstack) ### VStack 以垂直线排列其子项的视图。 创建静态可滚动列表 ```swift VStack (alignment: .center, spacing: 20){ Text("Hello") Divider() Text("World") } ``` Documentation - [VStack](https://developer.apple.com/documentation/swiftui/vstack) ### LazyVStack `iOS 14` 一种视图，将其子级排列在垂直增长的线中，仅在需要时创建项。 ```swift ScrollView { LazyVStack(alignment: .leading) { ForEach(1...100, id: \.self) { Text("Row \($0)") } } } ``` Documentation - [LazyVStack](https://developer.apple.com/documentation/swiftui/lazyvstack) ### ZStack 覆盖其子项的视图，使子项在两个轴上对齐。 ```swift ZStack { Text("Hello") .padding(10) .background(Color.red) .opacity(0.8) Text("World") .padding(20) .background(Color.red) .offset(x: 0, y: 40) } ``` Documentation - [ZStack](https://developer.apple.com/documentation/swiftui/zstack) ### List 列表 一个容器，用于显示排列在单列中的数据行。 创建静态可滚动列表 ```swift List { Text("Hello world") Text("Hello world") Text("Hello world") } ``` 可混合的列表 ```swift List { Text("Hello world") Image(systemName: "clock") } ``` 创建动态列表 ```swift let names = ["John", "Apple", "Seed"] List(names) { name in Text(name) } ``` 添加 `Section` ```swift List { Section(header: Text("UIKit"), footer: Text("We will miss you")) { Text("UITableView") } Section(header: Text("SwiftUI"), footer: Text("A lot to learn")) { Text("List") } } ``` 要使其分组，请添加 `.listStyle(GroupedListStyle())` ```swift List { Section(header: Text("UIKit"), footer: Text("We will miss you")) { Text("UITableView") } Section(header: Text("SwiftUI"), footer: Text("A lot to learn")) { Text("List") } }.listStyle(GroupedListStyle()) ``` 要使其插入分组(`.insetGrouped`)，请添加 `.listStyle(GroupedListStyle())` 并强制使用常规水平尺寸类 ``.environment(\.horizontalSizeClass, .regular)``。 ```swift List { Section(header: Text("UIKit"), footer: Text("We will miss you")) { Text("UITableView") } Section(header: Text("SwiftUI"), footer: Text("A lot to learn")) { Text("List") } }.listStyle(GroupedListStyle()) .environment(\.horizontalSizeClass, .regular) ``` > 插图分组已添加到 `iOS 13.2` 中的 `SwiftUI` `iOS 14` 在 `iOS 14` 中，我们为此设置了专用样式。 ```swift .listStyle(InsetGroupedListStyle()) ``` Documentation - [List](https://developer.apple.com/documentation/swiftui/list) ### ScrollView 滚动视图 滚动视图。 ```swift ScrollView(alwaysBounceVertical: true) { Image("foo") Text("Hello World") } ``` Documentation - [ScrollView](https://developer.apple.com/documentation/swiftui/scrollview) ### LazyHGrid 一种容器视图，将其子视图排列在水平增长的网格中，仅在需要时创建项目。 ```swift var rows: [GridItem] = Array(repeating: .init(.fixed(20)), count: 2) ScrollView(.horizontal) { LazyHGrid(rows: rows, alignment: .top) { ForEach((0...100), id: \.self) { Text("\($0)").background(Color.pink) } } } ``` Documentation - [LazyHGrid](https://developer.apple.com/documentation/swiftui/lazyhgrid) ### LazyVGrid 容器视图，将其子视图排列在垂直增长的网格中，仅在需要时创建项目。 ```swift var columns: [GridItem] = Array(repeating: .init(.fixed(20)), count: 5) ScrollView { LazyVGrid(columns: columns) { ForEach((0...100), id: \.self) { Text("\($0)").background(Color.pink) } } } ``` Documentation - [LazyVGrid](https://developer.apple.com/documentation/swiftui/lazyvgrid) ### Form 用于对用于数据输入的控件（例如在设置或检查器中）进行分组的容器。 您几乎可以在此表单中放入任何内容，它将为表单呈现适当的样式。 ```swift NavigationView { Form { Section { Text("Plain Text") Stepper(value: $quantity, in: 0...10, label: { Text("Quantity") }) } Section { DatePicker($date, label: { Text("Due Date") }) Picker(selection: $selection, label: Text("Picker Name") , content: { Text("Value 1").tag(0) Text("Value 2").tag(1) Text("Value 3").tag(2) Text("Value 4").tag(3) }) } } } ``` Documentation - [Form](https://developer.apple.com/documentation/swiftui/form) ### Spacer 沿其包含的堆栈布局的主轴或如果不包含在堆栈中的两个轴上扩展的灵活空间。 ```swift HStack { Image(systemName: "clock") Spacer() Text("Time") } ``` Documentation - [Spacer](https://developer.apple.com/documentation/swiftui/spacer) ### Divider 可用于分隔其他内容的视觉元素。 ```swift HStack { Image(systemName: "clock") Divider() Text("Time") }.fixedSize() ``` Documentation - [Divider](https://developer.apple.com/documentation/swiftui/divider) ### NavigationView 用于呈现视图堆栈的视图，这些视图表示导航层次结构中的可见路径。 ```swift NavigationView { List { Text("Hello World") } .navigationBarTitle(Text("Navigation Title")) // Default to large title style } ``` 对于旧样式标题 ```swift NavigationView { List { Text("Hello World") } .navigationBarTitle(Text("Navigation Title"), displayMode: .inline) } ``` 添加 `UIBarButtonItem` ```swift NavigationView { List { Text("Hello World") } .navigationBarItems(trailing: Button(action: { // Add action }, label: { Text("Add") }) ) .navigationBarTitle(Text("Navigation Title")) } ``` 使用 [NavigationLink](https://fuckingswiftui.com/#navigationlink) 添加显示/推送 用作 `UISplitViewController`。 ```swift NavigationView { List { NavigationLink("Go to detail", destination: Text("New Detail")) }.navigationBarTitle("Master") Text("Placeholder for Detail") } ``` 您可以使用两个新的样式属性为 `NavigationView` 设置样式：`stack和doubleColumn`。 默认情况下，`iPhone` 和 `Apple TV` 上的导航视图在视觉上反映了导航堆栈，而在 `iPad` 和 `Mac` 上，显示的是拆分视图样式的导航视图。 您可以使用 `.navigationViewStyle` 覆盖它。 ```swift NavigationView { MyMasterView() MyDetailView() } .navigationViewStyle(StackNavigationViewStyle()) ``` `iOS 14` 在 `iOS 14` 中，`UISplitViewController` 有新的侧边栏样式。 您也可以通过在 `NavigationView` 下放置三个视图来做到这一点。 ```swift NavigationView { Text("Sidebar") Text("Primary") Text("Detail") } ``` Documentation - [NavigationView](https://developer.apple.com/documentation/swiftui/navigationview) `iOS 14` 在 `UIViewController` 中添加 `UIToolbar`，如 `toolbarItems`。 ```swift NavigationView { Text("SwiftUI").padding() .toolbar { ToolbarItem(placement: .bottomBar) { Button { } label: { Image(systemName: "archivebox") } } ToolbarItem(placement: .bottomBar) { Spacer() } ToolbarItem(placement: .bottomBar) { Button { } label: { Image(systemName: "square.and.pencil") } } } } ``` Documentation - [ToolbarItem](https://developer.apple.com/documentation/swiftui/toolbaritem) ### TabView 一个视图，允许使用可交互的用户界面元素在多个子视图之间进行切换。 ```swift TabView { Text("First View") .font(.title) .tabItem({ Text("First") }) .tag(0) Text("Second View") .font(.title) .tabItem({ Text("Second") }) .tag(1) } ``` 图像和文本在一起。 您可以在此处使用 `SF Symbol`。 ```swift TabView { Text("First View") .font(.title) .tabItem({ Image(systemName: "circle") Text("First") }) .tag(0) Text("Second View") .font(.title) .tabItem(VStack { Image("second") Text("Second") }) .tag(1) } ``` 或者您可以省略 `VStack` ```swift TabView { Text("First View") .font(.title) .tabItem({ Image(systemName: "circle") Text("First") }) .tag(0) Text("Second View") .font(.title) .tabItem({ Image("second") Text("Second") }) .tag(1) } ``` ### Alert 警报演示的容器。 我们可以根据布尔值显示Alert。 ```swift @State var isError: Bool = false Button("Alert") { self.isError = true }.alert(isPresented: $isError, content: { Alert(title: Text("Error"), message: Text("Error Reason"), dismissButton: .default(Text("OK"))) }) ``` 它也与可识别项绑定。 ```swift @State var error: AlertError? var body: some View { Button("Alert Error") { self.error = AlertError(reason: "Reason") }.alert(item: $error, content: { error in alert(reason: error.reason) }) } func alert(reason: String) -> Alert { Alert(title: Text("Error"), message: Text(reason), dismissButton: .default(Text("OK")) ) } struct AlertError: Identifiable { var id: String { return reason } let reason: String } ``` Documentation - [Alert](https://developer.apple.com/documentation/swiftui/alert) ### Modal Modal 过渡。 我们可以显示基于布尔的 Modal。 ```swift @State var isModal: Bool = false var modal: some View { Text("Modal") } Button("Modal") { self.isModal = true }.sheet(isPresented: $isModal, content: { self.modal }) ``` Documentation - [Sheet](https://developer.apple.com/documentation/swiftui/view/3352791-sheet) 它也与可识别项绑定。 ```swift @State var detail: ModalDetail? var body: some View { Button("Modal") { self.detail = ModalDetail(body: "Detail") }.sheet(item: $detail, content: { detail in self.modal(detail: detail.body) }) } func modal(detail: String) -> some View { Text(detail) } struct ModalDetail: Identifiable { var id: String { return body } let body: String } ``` Documentation - [Sheet](https://developer.apple.com/documentation/swiftui/view/3352792-sheet) `iOS 14` 如果要使用模式显示以全屏显示的旧模式显示，可以使用 `.fullScreenCover` 而不是 `.sheet`。 由于全屏封面样式不允许用户使用手势来消除模态，因此您必须添加一种方法来手动消除呈现的视图。 在下面的示例中，我们通过将 `isModal` 设置为 `false` 来添加一个按钮来消除显示的视图。 ```swift @State var isModal: Bool = false var modal: some View { Text("Modal") Button("Dismiss") { self.isModal = false } } Button("Fullscreen") { self.isModal = true }.fullScreenCover(isPresented: $isFullscreen, content: { self.modal }) ``` 如果您将自定义视图用作模式，则可以使用 `presentationMode` 环境键关闭显示的视图。 ```swift struct Modal: View { @Environment(\.presentationMode) var presentationMode var body: some View { Text("Modal") Button("Dismiss Modal") { presentationMode.wrappedValue.dismiss() } } } struct ContentView: View { @State private var isModal = false var body: some View { Button("Fullscreen") { isModal = true } .fullScreenCover(isPresented: $isFullscreen, content: { Modal() }) } ``` Documentation - [fullScreenCover](https://developer.apple.com/documentation/swiftui/view/fullscreencover(ispresented:ondismiss:content:)) ### ActionSheet 操作表演示文稿的存储类型。 我们可以显示基于布尔值的 `ActionSheet`。 ```swift @State var isSheet: Bool = false var actionSheet: ActionSheet { ActionSheet(title: Text("Action"), message: Text("Description"), buttons: [ .default(Text("OK"), action: { }), .destructive(Text("Delete"), action: { }) ] ) } Button("Action Sheet") { self.isSheet = true }.actionSheet(isPresented: $isSheet, content: { self.actionSheet }) ``` 它也与可识别项绑定。 ```swift @State var sheetDetail: SheetDetail? var body: some View { Button("Action Sheet") { self.sheetDetail = ModSheetDetail(body: "Detail") }.actionSheet(item: $sheetDetail, content: { detail in self.sheet(detail: detail.body) }) } func sheet(detail: String) -> ActionSheet { ActionSheet(title: Text("Action"), message: Text(detail), buttons: [ .default(Text("OK"), action: { }), .destructive(Text("Delete"), action: { }) ] ) } struct SheetDetail: Identifiable { var id: String { return body } let body: String } ``` Documentation - [ActionSheet](https://developer.apple.com/documentation/swiftui/actionsheet) ================================================ FILE: example/composing-views/demo1/Demo/Demo.xcodeproj/project.pbxproj 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================================================ FILE: example/composing-views/demo1/Demo/Shared/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/composing-views/demo1/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", 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Created by 王楚江 on 2021/3/24. // import SwiftUI struct Employee { var name: String var jobTitle: String var emailAddress: String var profilePicture: String } struct ProfilePicture: View { var imageName: String var body: some View { Image(imageName) .resizable() .frame(width: 100, height: 100) .clipShape(Circle()) } } struct EmailAddress: View { var address: String var body: some View { HStack { Image(systemName: "envelope") Text(address) } } } struct EmployeeDetails: View { var employee: Employee var body: some View { VStack(alignment: .leading) { Text(employee.name) .font(.largeTitle) .foregroundColor(.primary) Text(employee.jobTitle) .foregroundColor(.secondary) EmailAddress(address: employee.emailAddress) } } } struct EmployeeView: View { var employee: Employee var body: some View { HStack { ProfilePicture(imageName: employee.profilePicture) EmployeeDetails(employee: employee) } } } struct ContentView: View { let employee = Employee(name: "hello world", jobTitle: "Editor, Hacking with Swift", emailAddress: "wowohoo@qq.com", profilePicture: "kenny") var body: some View { EmployeeView(employee: employee) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/composing-views/demo1/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/composing-views/demo1/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/composing-views/demo1/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/composing-views/demo1/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/composing-views/demo1/README.md ================================================ 如何创建和组合自定义视图？ === SwifUI 的一个核心原则是组成，这意味着它为我们设计了许多小视图，然后将它们与它们组合在一起，以创造更大的东西。 这使我们能够在大规模的规模上重新使用视图，这意味着对我们的工作较少。 甚至更好，结合小子视图几乎没有运行时开销，所以我们可以自由使用它们。 关键是从小事做起，逐步提升。例如，许多应用程序必须与以下类似的员工一起工作： ```swift struct Employee { var name: String var jobTitle: String var emailAddress: String var profilePicture: String } ``` 如果您希望在应用程序中具有一致的员工配置文件的设计，则可以使用圆形形状创建一个 `100x100` 图像视图： ```swift struct ProfilePicture: View { var imageName: String var body: some View { Image(imageName) .resizable() .frame(width: 100, height: 100) .clipShape(Circle()) } } ``` 您的设计师可能会告诉您，每当可见电子邮件地址时，你应该显示一个小信封图标旁边作为一个视觉提示，所以你可以做一个 `EmailAddress` 视图： ```swift struct EmailAddress: View { var address: String var body: some View { HStack { Image(systemName: "envelope") Text(address) } } } ``` 展示员工的详细信息时，您可以创建一个查看的视图，该视图具有整洁的姓名和职位标题，使用电子邮件地址备份，使用您的 `EmailAddress` 视图，如下所示： ```swift struct EmployeeDetails: View { var employee: Employee var body: some View { VStack(alignment: .leading) { Text(employee.name) .font(.largeTitle) .foregroundColor(.primary) Text(employee.jobTitle) .foregroundColor(.secondary) EmailAddress(address: employee.emailAddress) } } } ``` 你甚至可以创建一个更大的视图，将 `ProfilePicture` 放在 `EmployeeDetails` 旁边，以便提供员工的单一视觉表现，如下所示： ```swift struct EmployeeView: View { var employee: Employee var body: some View { HStack { ProfilePicture(imageName: employee.profilePicture) EmployeeDetails(employee: employee) } } } ``` 通过这种结构，我们现在有几种方式显示员工： - 只是他们的照片 - 只是他们的电子邮件地址 - 只是他们的工作细节 - 一次性完成所有事情 更重要的是，这意味着当使用所有这些工作时，我们的主要内容视图不必担心员工的外观或应该如何对待他们 - 所有这些工作都被整合到我们的较小视图中。这意味着我们可以创建一个带有示例员工的 `EmployeeView` ，并让它正常工作。 要一起演示所有这些，这里有一个代码示例，其中包含所有较小的视图结构，以显示单个员工的 `ContentView` 结构结尾。 对于用户来说，结果是相同的，但我们最终通过一系列的小视图来做个体的东西，每个都可以以任何数量的不同方式重新组合。 这是代码： ```swift struct Employee { var name: String var jobTitle: String var emailAddress: String var profilePicture: String } struct ProfilePicture: View { var imageName: String var body: some View { Image(imageName) .resizable() .frame(width: 100, height: 100) .clipShape(Circle()) } } struct EmailAddress: View { var address: String var body: some View { HStack { Image(systemName: "envelope") Text(address) } } } struct EmployeeDetails: View { var employee: Employee var body: some View { VStack(alignment: .leading) { Text(employee.name) .font(.largeTitle) .foregroundColor(.primary) Text(employee.jobTitle) .foregroundColor(.secondary) EmailAddress(address: employee.emailAddress) } } } struct EmployeeView: View { var employee: Employee var body: some View { HStack { ProfilePicture(imageName: employee.profilePicture) EmployeeDetails(employee: employee) } } } struct ContentView: View { let employee = Employee(name: "hello world", jobTitle: "Editor, Hacking with Swift", emailAddress: "wowohoo@qq.com", profilePicture: "paul-hudson") var body: some View { EmployeeView(employee: employee) } } ``` ================================================ FILE: example/composing-views/demo2/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D5F679D260B23CC00E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F678A260B23CA00E964BB /* DemoApp.swift */; }; 7D5F679E260B23CC00E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F678A260B23CA00E964BB /* DemoApp.swift */; }; 7D5F679F260B23CC00E964BB /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F678B260B23CA00E964BB /* 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// import SwiftUI struct ContentView: View { var body: some View { Text("SwiftUI ") .foregroundColor(.red) + Text("is ") .foregroundColor(.orange) .fontWeight(.black) + Text("awesome") .foregroundColor(.blue) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/composing-views/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/composing-views/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) 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$(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/composing-views/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/composing-views/demo2/README.md ================================================ 如何将文本视图结合在一起？ === SwifUI 的 `Text View` 重载了 + 运算符，以便您可以将它们组合在一起以创建新的文本视图。 这对于在视图之间需要具有不同格式的情况非常有帮助，因为您可以使每个文本视图看起来完全符合您的要求，然后将它们连接起来以创建一个单独的组合文本视图。更棒的是， `VoiceOver` 在阅读时会自动将它们识别为单个文本块。 例如，以下代码创建了三个文本视图，然后使用+运算符将它们连接成一个返回的单个文本视图： ```swift Text("SwiftUI ") .font(.largeTitle) + Text("is ") .font(.headline) + Text("awesome") .font(.footnote) ``` 您还可以使用此技术创建不同颜色或文本的字体权重，如下所示： ```swift Text("SwiftUI ") .foregroundColor(.red) + Text("is ") .foregroundColor(.orange) .fontWeight(.black) 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example/composing-views/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/composing-views/demo3/README.md ================================================ 如何将视图存储为属性？ === 如果您在另一个视图中嵌套了几种视图，则可能会发现为某些或全部创建属性，以使布局代码更容易。 然后，您可以在视图代码内彻底引用这些属性，帮助保持清除。 例如，这会创建两个文本视图作为属性，然后将它们放在 `VStack` 中： ```swift struct ContentView: View { let title = Text("Paul Hudson") .bold() let subtitle = Text("Author") .foregroundColor(.secondary) var body: some View { VStack { title subtitle } } } ``` 如您所见，只需在堆栈中写入属性名称就足够了。 但是，甚至更好就是您可以将修改器附加到这些属性名称，如下所示： ```swift struct ContentView: View { let title = Text("Paul Hudson") .bold() let subtitle = Text("Author") .foregroundColor(.secondary) var body: some View { VStack { title .foregroundColor(.red) subtitle } } } ``` 这不会改变标题的底层样式，只有它的一个具体用法。 ================================================ 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com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/composing-views/demo4/README.md ================================================ 如何创建自定义修改程序？ === 如果您发现自己不断将相同的修改器集附加到视图 - 例如，请给出背景颜色，一些填充，特定字体等 - 然后您可以通过创建封装所有这些更改的自定义视图修改器来避免重复 。 所以，而不是说“让它变红，使它使用一个大字体”等，你可以说“让它看起来像警告”，并应用一组预先制作的修饰符。 如果要自己制作，请定义符合 `ViewModifier` 协议的结构。 此协议要求您接受一个 `body(content:)`，该方法转换某种内容，返回结果。 例如，这会创建一个新的 `PrimaryLabel` 修改器，该修饰程序添加填充，红色背景，白色文本和大字体，然后在视图中使用它： ```swift struct PrimaryLabel: ViewModifier { func body(content: Content) -> some View { content .padding() .background(Color.red) .foregroundColor(Color.white) .font(.largeTitle) } } struct ContentView: View { var body: some View { Text("Hello, SwiftUI") .modifier(PrimaryLabel()) } } ``` ================================================ FILE: example/composing-views/demo5/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { 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================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/composing-views/demo5/README.md ================================================ 如何为 `UIViewRepresentable` 结构创建修饰符？ === 虽然 `SwiftUI` 在提供许多 `UIView`子类的情况下做得很好，但目前它还没有它们。 幸运的是，为您想要的 `UIView` 创建自定义包装并不难。 例如，让我们为 `UITextView` 创建一个简单的 `SwiftUI` 包装作为富文本编辑器的基础。 这需要四个步骤： 1. 创建符合 `UIViewRepresentable` 的结构。 2. 定义一个存储我们正在使用的文本字符串的属性。 3. 给它一个将返回文本视图的 `makeUIView()` 方法。 4. 添加 `updateUIView()` 方法，每当文本视图的数据已更改时将被调用。 在代码中，我们最终结束了： ```swift struct TextView: UIViewRepresentable { @Binding var text: NSMutableAttributedString func makeUIView(context: Context) -> UITextView { UITextView() } func updateUIView(_ uiView: UITextView, context: Context) { uiView.attributedText = text } } ``` 那就是它！ 您现在可以立即使用 `SwiftUI` 视图中的 `TextView` 组件，例如： ```swift struct ContentView: View { @State var text = NSMutableAttributedString(string: "") var body: some View { TextView(text: $text) .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity) } } ``` 因为它使用归属文本，您可以添加一些按钮以启用格式，例如粗体(bold)，斜体(italics)等。 ================================================ FILE: example/composing-views/demo6/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D5F6841260B28F700E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F682E260B28F600E964BB /* DemoApp.swift */; }; 7D5F6842260B28F700E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F682E260B28F600E964BB /* DemoApp.swift */; }; 7D5F6843260B28F700E964BB /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F682F260B28F600E964BB /* ContentView.swift */; }; 7D5F6844260B28F700E964BB /* ContentView.swift in Sources */ = {isa = 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{ "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" }, { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/composing-views/demo6/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/composing-views/demo6/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct SearchField: UIViewRepresentable { @Binding var text: String private var placeholder = "" init(text: Binding) { _text = text } func makeUIView(context: Context) -> UISearchBar { let searchBar = UISearchBar() searchBar.placeholder = placeholder return searchBar } // 始终在更新时复制占位符文本 func updateUIView(_ uiView: UISearchBar, context: Context) { uiView.text = text uiView.placeholder = placeholder } } // 任何调整搜索字段的修改器 - 复制自我，调整，然后返回。 extension SearchField { func placeholder(_ string: String) -> SearchField { var view = self view.placeholder = string return view } } struct ContentView: View { @State private var text = "" @State private var placeHolder = "Hello, world!" var body: some View { VStack { SearchField(text: $text) .placeholder(placeHolder) Button("Tap me") { // 随机化每个按下占位符，以证明这作品 placeHolder = UUID().uuidString } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/composing-views/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/composing-views/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/composing-views/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/composing-views/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/composing-views/demo6/README.md ================================================ 如何为 `UIViewRepresentable` 结构创建修饰符？ === 在 `UIViewRepresentable` 结构中包装 `UIView` 是将现有的 `UIKit` 带入您的 `SwiftUI` 应用程序的好方法，您甚至可以添加自己的自定义修改器来调整视图在运行时工作的方式。 要进行此工作，您应该为要在底层 `UIView` 上调整的所有值的私有属性，然后创建调整方法。 这些方法中的每一种都应拍摄您的 `SwiftUI` 可代表性的副本 - 而不是基础 `UIView` - 然后调整您之前创建的私有属性以反映新状态。 一旦完成，`SwiftUI`将确保触发 `UpdateUiview()`方法，此时您将私有属性复制到 `UIView` 中以确保更新。 作为一个示例，您可以创建 `UIViewRepresentable` 以将 `UisearchBar` 桥接到 `SwiftUI`，但您可能希望其某些方面是可自定义的，例如其占位符文本。 首先，您可以为其占位符创建带有额外私有财产的可代表性： ```swift struct SearchField: UIViewRepresentable { @Binding var text: String private var placeholder = "" init(text: Binding) { _text = text } func makeUIView(context: Context) -> UISearchBar { let searchBar = UISearchBar() searchBar.placeholder = placeholder return searchBar } // 始终在更新时复制占位符文本 func updateUIView(_ uiView: UISearchBar, context: Context) { uiView.text = text uiView.placeholder = placeholder } } ``` 其次，在可表示的修饰符上创建一个调整私有属性： ```swift // 任何调整搜索字段的修改器 - 复制自我，调整，然后返回。 extension SearchField { func placeholder(_ string: String) -> SearchField { var view = self view.placeholder = string return view } } ``` 现在你们都设置了使用它。 例如，这将使用我们的 `.placeholder()` 修改器创建一个 `SearchField` 视图，但每次单击按钮时，我们会随机化占位符，以便您可以看到所有操作： ```swift struct ContentView: View { @State private var text = "" @State private var placeHolder = "Hello, world!" var body: some View { VStack { SearchField(text: $text) .placeholder(placeHolder) Button("Tap me") { // 随机化每个按下占位符，以证明这作品 placeHolder = UUID().uuidString } } } } ``` ================================================ FILE: example/composing-views/demo7/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D5F686A260B29D100E964BB /* 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example/composing-views/demo7/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/composing-views/demo7/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { (Text("Hello ") + Text(Image(systemName: "star")) + Text(" World!")) .foregroundColor(.blue) .font(.largeTitle) Text("Hello ") + Text(Image(systemName: "star")) + Text(" World!") .foregroundColor(.blue) .font(.largeTitle) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/composing-views/demo7/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/composing-views/demo7/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/composing-views/demo7/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/composing-views/demo7/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/composing-views/demo7/README.md ================================================ 如何将图像插入文本？ === SWIFTUI允许您使用 `+` 组合文本视图，但您也可以使用简单的文本初始化程序将图像直接放入文本中。 这允许您直接放置在文本内部的图像，包括根据需要提供文本和图像。 例如，这将 `Hello World` 与中间中间有一个星形图像： ```swift Text("Hello ") + Text(Image(systemName: "star")) + Text(" World!") ``` 文本内部的图像将自动调整以匹配您所选择的任何字体或匹配颜色，但请确保将修改器应用于整个加入文本而不是简单的最后一个项目。 例如，这将使整个组合的文本大而蓝： ```swift (Text("Hello ") + Text(Image(systemName: "star")) + Text(" World!")) .foregroundColor(.blue) .font(.largeTitle) ``` 而这 - 没有额外的括号 - 只会制造大型和蓝色的 `World` 文本： ```swift Text("Hello ") + Text(Image(systemName: "star")) + Text(" World!") .foregroundColor(.blue) .font(.largeTitle) ``` ================================================ FILE: example/containers/demo1/README.md ================================================ 使用容器 === `SwiftUI` 被设计成开箱即用，这意味着您可以根据需要将一个视图放置在另一个视图中。 当使用我们习惯的主要容器视图（例如导航控制器和选项卡栏控制器）时，这特别有用。 我们可以将我们想要的任何视图直接放入另一个容器视图中，`SwiftUI` 会自动调整其布局。 在这方面，SwiftUI 自己的容器（`NavigationView`，`TabView`，`Group`等）与我们使用自己的视图组合制作的容器没有什么不同。 ================================================ FILE: 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DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/containers/demo10/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait 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================================================ 如何为 `iPadOS` 添加侧边栏？ === 在 `iPadOS` 中，不仅可以显示常规的拆分视图控制器，还可以添加可以通过单击按钮显示的侧边栏。 在 `SwiftUI` 中，我们通过向 `NavigationView` 中添加第三个视图来完成此操作，如下所示： ```swift struct ContentView: View { var body: some View { NavigationView { Text("Sidebar") Text("Primary View") Text("Detail View") } } } ``` SwiftUI 将自动显示一个按钮，以从屏幕侧面在栏中滑动，如果您使用的是紧凑尺寸类，则还可以在主视图中将其折叠。 如果要在侧边栏中显示列表，则最好使用 `.listStyle()`为侧边栏提供系统标准的主题，如下所示： ```swift struct ContentView: View { var body: some View { List(1..<100) { i in Text("Row \(i)") } .listStyle(SidebarListStyle()) } } ``` ================================================ FILE: example/containers/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D1F022B2610E40E0021302D /* PostNoSelectionPlaceholder.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D1F022A2610E40E0021302D /* 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struct Details: View { let name: String? var body: some View { Text(" \(name ?? "")") .padding(.vertical, 2.0) } } struct ContentSplitView: View { let name: String? var body: some View { Text(" Content \(name ?? "")") .frame(minWidth: 300, maxWidth: .infinity) .toolbar { Text("Detail") Button(action: toggleSidebar) { Image(systemName: "square.righthalf.fill") .imageScale(.medium) } .buttonStyle(BorderedButtonStyle()) Button(action: toggleSidebar) { Image(systemName: "square.righthalf.fill") .imageScale(.medium) } } } private func toggleSidebar() { #if os(macOS) NSApp.keyWindow?.firstResponder?.tryToPerform(#selector(NSSplitViewController.toggleSidebar(_:)), with: nil) #endif } } struct ContentView: View { @State private var users = ["Paul", "Taylor", "Adele"] @State var select: String? = "Paul" var body: some View { NavigationView { List { ForEach(users.indices, id: \.self) { index in NavigationLink( destination: ContentSplitView(name: users[index]), tag: users[index], selection: $select ) { Details(name: users[index]) } } } ProgressView() PostNoSelectionPlaceholder() // .frame(minWidth: 200, maxWidth: .infinity) .frame(minWidth: 200, maxWidth: 260) // .frame(minWidth: 100, // maxWidth: 210, // maxHeight: .infinity) .toolbar { ToolbarItemGroup { Text("Title") Spacer() Button(action: {}) { Image(systemName: "square.righthalf.fill") .imageScale(.medium) } } } } .frame(minWidth: 800, minHeight: 400) .onAppear { print("ttt") #if os(macOS) NSApp.keyWindow?.toolbar?.insertItem(withItemIdentifier: .toggleSidebar, at: 0) #endif } .listStyle(SidebarListStyle()) } private func toggleSidebar() { #if os(macOS) NSApp.keyWindow?.firstResponder?.tryToPerform(#selector(NSSplitViewController.toggleSidebar(_:)), with: nil) #endif } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/containers/demo11/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/26. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/containers/demo11/Demo/Shared/PostNoSelectionPlaceholder.swift ================================================ // // PostNoSelectionPlaceholder.swift // Demo // // Created by 王楚江 on 2021/3/29. // import SwiftUI struct PostNoSelectionPlaceholder: View { var body: some View { VStack(alignment: .center, spacing: 16) { Text("No post selected") .font(.headline) .fontWeight(.bold) Image(systemName: "bolt.slash") .resizable() .frame(width: 20, height: 20) } .frame(minWidth: 200, maxWidth: 260) // .frame(minWidth: 200, // maxWidth: .infinity, // maxHeight: .infinity) } } struct PostNoSelectionPlaceholder_Previews: PreviewProvider { static var previews: some View { PostNoSelectionPlaceholder() } } ================================================ FILE: example/containers/demo11/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/containers/demo11/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo11/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo11/README.md ================================================ 如何隐藏和显示 `NavigationView` 侧边栏？ === 在 `macOS` 中， 希望通过手动控制 `Sidebar` 的展示也隐藏。幸运的是，我们可以使用下面方法实现： ![](imgs/1.png) ```swift struct ContentView: View { var body: some View { NavigationView { }.toolbar { ToolbarItem(placement: .navigation) { Button(action: toggleSidebar, label: { Image(systemName: "sidebar.left") }) } } } } func toggleSidebar() { #if os(macOS) 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Text("SwiftUI") .navigationTitle("Welcome") #endif } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/containers/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/containers/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/containers/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo2/README.md ================================================ 如何在导航视图中嵌入视图？ === SwiftUI 的 `NavigationView` 或多或少地映射到 `UIKit` 的 `UINavigationController`，因为它可以显示内容，可以处理视图之间的导航，并将导航栏放置在屏幕顶部。 您可以以最简单的形式将文本视图放入导航视图，如下所示： ```swift struct ContentView: View { var body: some View { NavigationView { Text("This is a great app") } } } ``` 但是，这会使顶部的导航栏为空。 因此，您通常会在要嵌入的内容上使用 `navigationTitle()` 修饰符，因此可以在屏幕顶部添加标题，如下所示： ```swift struct ContentView: View { var body: some View { NavigationView { Text("SwiftUI") .navigationTitle("Welcome") } } } ``` 还有第二个修饰符 `navigationBarTitleDisplayMode()`，它使我们可以控制使用大标题还是较小的内联标题。 例如，默认情况下，视图将从任何显示的视图继承其大标题显示模式，或者如果是初始视图，则将使用大标题。 但是，如果您希望手动启用或禁用大标题，则应使用 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struct ContentView: View { var body: some View { NavigationView { #if !os(macOS) Text("SwiftUI") .navigationTitle("Welcome") .toolbar { ToolbarItem(placement: .navigationBarLeading) { Button("Help") { print("Help tapped!") } } } #else Text("SwiftUI") .navigationTitle("Welcome") .toolbar { ToolbarItem(placement: .navigation) { Button("About") { print("About tapped!") } Button("Help") { print("Help tapped!") } } } #endif } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/containers/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/containers/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/containers/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo3/README.md ================================================ 如何将栏项目添加到导航视图？ === `toolbar()` 修饰符使我们可以将单个或多个条形按钮项添加到导航视图的前缘和后缘，以及视需要添加到视图的其他部分。 这些可能是可点击的按钮，但没有限制-您可以添加任何类型的视图。 例如，这在导航视图的尾部添加了一个 `帮助` 按钮： ```swift struct ContentView: View { var body: some View { NavigationView { Text("SwiftUI") .navigationTitle("Welcome") .toolbar { Button("帮助") { print("帮助 tapped!") } } } } } ``` 我们尚未指定按钮的显示位置，但是没关系 – `SwiftUI` 知道尾部是从左到右语言的最佳位置，并且会自动将其翻转到另一侧，以显示从右到左的语言。 如果要控制按钮的确切位置，可以通过将其包装在 `ToolbarItem` 中并指定所需的位置来进行控制。 例如，这将创建一个按钮并将其强制置于导航栏的前沿： ```swift struct ContentView: View { var body: some View { NavigationView { Text("SwiftUI") .navigationTitle("Welcome") .toolbar { ToolbarItem(placement: .navigationBarLeading) { Button("Help") { print("Help tapped!") } } } } } } ``` 如果要将多个条形按钮放置在不同的位置，则可以根据需要重复 `ToolbarItem` 多次，并且每次都指定一个不同的放置位置。 要将多个条形按钮放在相同的位置，应将它们包装在 `ToolbarItemGroup` 中，如下所示： ```swift struct ContentView: View { var body: some View { NavigationView { Text("SwiftUI") .navigationTitle("Welcome") .toolbar { ToolbarItemGroup(placement: .navigationBarTrailing) { Button("About") { print("About tapped!") } Button("Help") { print("Help tapped!") } } } } } } ``` ================================================ FILE: example/containers/demo4/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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} ================================================ FILE: example/containers/demo4/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/containers/demo4/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI struct ContentView: View { var body: some View { TabView { Text("First View") .padding() .tabItem { Image(systemName: "1.circle") Text("First") } .tag(1) Text("Second View") .padding() .tabItem { Image(systemName: "2.circle") Text("Second") } .tag(2) Text("First View") .padding() .tabItem { Label("First", systemImage: "1.circle") } .tag(3) Text("Second View") .padding() .tabItem { Label("Second", systemImage: "2.circle") } .tag(4) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/containers/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/containers/demo4/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations 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com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo4/README.md ================================================ 如何使用 `TabView` 将视图嵌入选项卡栏中？ === SwiftUI 的 `TabView` 提供了与 `UITabBarController` 等效的功能，使我们可以使用屏幕底部的栏让用户在多个活动视图之间切换。 在其基本形式中，应为每个项目提供图像和标题，如果要以编程方式控制哪个选项卡处于活动状态，则还可以选择添加标签。 例如，这将创建两个具有不同图像，标题和标签的视图： ```swift struct ContentView: View { var body: some View { TabView { Text("First View") .padding() .tabItem { Image(systemName: "1.circle") Text("First") } .tag(1) Text("Second View") .padding() .tabItem { Image(systemName: "2.circle") Text("Second") } .tag(2) } } } ``` 除了单独指定文本和图像，您还可以使用“标签”视图将它们组合在一起： ```swift struct ContentView: View { var body: some View { TabView { Text("First View") .padding() .tabItem { Label("First", systemImage: "1.circle") } .tag(1) Text("Second View") .padding() .tabItem { Label("Second", systemImage: "2.circle") } .tag(2) } } } ``` 如果添加标签，则可以通过修改标签页视图的选择来以编程方式控制活动标签页。 在此示例中，我使每个选项卡的内容成为一个更改视图的按钮，方法是添加一些新状态以跟踪哪个选项卡处于活动状态，然后将其附加到 `TabView` 的 `selection` 值：： ```swift struct ContentView: View { @State var selectedView = 1 var body: some View { TabView(selection: $selectedView) { Button("Show Second View") { selectedView = 2 } .padding() .tabItem { Label("First", systemImage: "1.circle") } .tag(1) Button("Show First View") { selectedView = 1 } .padding() .tabItem { Label("Second", systemImage: "2.circle") } .tag(2) } } } ``` 选项卡的标签可以是任何您想要的，只要数据类型符合 `Hashable`。 整数可能工作得很好，但是如果您要进行任何有意义的程序化导航，则应确保将标签放在中心位置，例如视图内的静态属性。 这使您可以在许多地方共享价值，从而减少出错的风险。 ================================================ FILE: example/containers/demo5/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7C897026066E7C00F97ED3 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7C895D26066E7B00F97ED3 /* DemoApp.swift */; }; 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"author" : "xcode", "version" : 1 } } ================================================ FILE: example/containers/demo5/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI struct ContentView: View { var body: some View { #if !os(macOS) TabView { Text("First") Text("Second") Text("Third") Text("Fourth") } .tabViewStyle(PageTabViewStyle()) .indexViewStyle(PageIndexViewStyle(backgroundDisplayMode: .always)) #else TabView { Text("First") Text("Second") Text("Third") Text("Fourth") } #endif } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/containers/demo5/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { 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================================================ FILE: example/containers/demo5/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo5/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo5/README.md ================================================ 如何使用 `tabViewStyle()` 创建内容的滚动页面？ === SwiftUI 的 `TabView` 相当于 `UIPageViewController` 的两倍，让我们可以在多个内容屏幕中滑动，底部的分页点可以向用户显示它们的位置。 若要激活页面视图样式，请将 `.tabViewStyle()` 修饰符附加到 `TabView` 中，并传入 `PageTabViewStyle()`。 例如，您可以将其添加到您的@main Swift文件中： ```swift struct ContentView: View { var body: some View { TabView { Text("First") Text("Second") Text("Third") Text("Fourth") } .tabViewStyle(PageTabViewStyle()) } } ``` 当它在 `iOS`，`tvOS` 和 `watchOS` 上运行时，您会发现可以在页面列表中滑动。 在 `macOS` 上，不支持 `PageTabViewStyle`。 警告：分页点是白色和半透明的白色，因此，如果您的视图背景也是白色的，您将看不到它们。 为了解决这个问题，您可以通过在 `tabViewStyle()` 之后放置额外的修饰符来要求 `SwiftUI` 在背景后面放置： ```swift struct ContentView: View { var body: some View { TabView { Text("First") Text("Second") Text("Third") Text("Fourth") } .tabViewStyle(PageTabViewStyle()) .indexViewStyle(PageIndexViewStyle(backgroundDisplayMode: .always)) } } ``` 您可以通过向 `PageTabViewStyle` 初始化程序添加一个额外的参数来控制分页点的显示方式。 例如，如果您不希望显示分页点，则可以使用以下命令： ```swift struct ContentView: View { var body: some View { TabView { Text("First") Text("Second") Text("Third") Text("Fourth") } 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Text("Line") Text("Line") Text("Line") } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/containers/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/containers/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/containers/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo6/README.md ================================================ 如何将视图组合 `Group` 在一起？ === 如果您需要多个视图作为一个视图（例如，一起过渡），则应使用 SwiftUI 的 `Group` 视图。 这一点特别重要，因为出于根本的技术原因，一次最多只能将10个视图添加到父视图。 为了说明这一点，这里是一个包含10条文字的 `VStack`： ```swift VStack { Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") } ``` 这样做很好，但是如果您尝试添加第十一段文本，则会出现如下错误：`ambiguous reference to member 'buildBlock()’`。 …几乎可以肯定，后面会出现更多错误文本。 这是因为 SwiftUI 的视图构建系统具有各种代码，旨在让我们添加1个视图，2个视图，3个视图或4、5、6、7、8、9和10个视图，但不能添加11个或更多视图– 不行 幸运的是，我们可以使用这样的组： ```swift VStack { Group { Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") } Group { Text("Line") Text("Line") Text("Line") Text("Line") Text("Line") } } ``` 这会产生完全相同的结果，只是现在我们可以超出 10 个视图的限制，因为 `VStack` 仅包含两个视图-两个组。 ================================================ FILE: example/containers/demo7/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7C89C22606716B00F97ED3 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7C89AF2606716A00F97ED3 /* DemoApp.swift */; }; 7D7C89C32606716B00F97ED3 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7C89AF2606716A00F97ED3 /* DemoApp.swift */; }; 7D7C89C42606716B00F97ED3 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7C89B02606716A00F97ED3 /* ContentView.swift */; }; 7D7C89C52606716B00F97ED3 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7C89B02606716A00F97ED3 /* ContentView.swift */; }; 7D7C89C62606716B00F97ED3 /* Assets.xcassets in Resources */ = {isa = 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UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/containers/demo7/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo7/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo7/README.md ================================================ 如何隐藏和显示状态栏？ === 我们可以使用SwiftUI `statusBar()` 修饰符隐藏和显示 iOS 状态栏。 这需要一个隐藏参数，该参数必须为 `true` 或 `false`，具体取决于您想要的行为： ```swift Text("No status bar, please") .statusBar(hidden: true) ``` ⚠️ 重要：此修饰符仅在iOS上可用。 如果您希望状态栏的可见性取决于某些程序状态，请使用 `@State` 布尔值来代替硬编码值。 例如，这创建了一个 `hideStatusBar` 布尔值，当点击一个按钮时会切换该布尔值，而布尔值又控制着状态栏是否显示： ```swift struct ContentView: View { @State private var hideStatusBar = false var body: some View { Button("Toggle Status Bar") { withAnimation { hideStatusBar.toggle() } } .statusBar(hidden: hideStatusBar) } } ``` 如您所见，这会在 `withAnimation` 块内切换布尔值，这会使状态栏平滑地淡入和淡出。 ================================================ 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static var previews: some View { ContentView() } } ================================================ FILE: example/containers/demo8/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/containers/demo8/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/containers/demo8/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo8/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo8/README.md ================================================ 如何使用 `DisclosureGroup` 隐藏和显示内容？ === SwiftUI 具有专用的 `DisclosureGroup` 视图，该视图呈现公开指示器并在其中包含内容。 可以将其绑定到某种Boolean属性，该属性确定内容当前是否可见，但是您可以在其中放置许多视图以在展开时显示。 例如，这将创建一个 `DisclosureGroup`，其中包含大量文本，默认情况下，该文本将被隐藏–用户将需要打开披露指示器来显示它： ```swift struct ContentView: View { @State private var revealDetails = false var body: some View { DisclosureGroup("Show Terms", isExpanded: $revealDetails) { Text("Long terms and conditions here long terms and conditions here long terms and conditions here long terms and conditions here long terms and conditions here long terms and conditions here.") } .frame(width: 300) } } ``` 提示：如果您不需要以编程方式显示或隐藏公开组的内容，则可以完全删除绑定，而只需依赖默认界面即可。 ================================================ FILE: example/containers/demo9/Demo/Demo.xcodeproj/project.pbxproj 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UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/containers/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/containers/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/containers/demo9/README.md ================================================ 如何创建工具栏并向其中添加按钮？ === SwiftUI 的 `toolbar()` 修饰符使我们可以将条形按钮项目放置在顶部或底部空间的任何位置，但前提是我们的视图嵌入在 `NavigationView` 中。 如果要将按钮放置在屏幕底部的工具栏中，请使用 `toolbar()`，然后使用 `.bottomBar` 的位置创建一个 `ToolbarItem`，如下所示： ```swift NavigationView { Text("Hello, World!").padding() .navigationTitle("SwiftUI") .toolbar { ToolbarItem(placement: .bottomBar) { Button("Press Me") { print("Pressed") } } } } ``` 要获得多个按钮，请使用 `ToolbarItemGroup` 而不是简单的 `ToolbarItem`，然后在其中放置多个按钮： ```swift NavigationView { Text("Hello, World!").padding() .navigationTitle("SwiftUI") .toolbar { ToolbarItemGroup(placement: .bottomBar) { Button("First") { print("Pressed") } Button("Second") { print("Pressed") } } } } ``` 如果要分隔 `ToolbarItemGroup` 中的按钮，请在任意位置添加间隔视图。 例如，这将在工具栏的左边缘放置一个按钮，在右边缘放置一个按钮： ```swift NavigationView { Text("Hello, World!").padding() .navigationTitle("SwiftUI") .toolbar { ToolbarItemGroup(placement: .bottomBar) { Button("First") { print("Pressed") } Spacer() Button("Second") { print("Pressed") } } } } ``` ================================================ FILE: example/cross-platform/demo1/README.md ================================================ 学习一次，随处应用 === 当 Apple 宣布 `SwiftUI` 时，他们做出了重要区分：SwiftUI 不是多平台框架，而是一个用于在多个平台上创建应用程序的框架。 似乎用两种不同的方式说了同样的话，但是实际上这意味着 SwiftUI 的许多部分都可以在 `iOS` 上很好地工作，但是在 `macOS` 上不可用，或者是专门为 `watchOS` 设计的，因此在任何地方都不可用。 别的。 是的，您应用程序的核心保持不变：您的模型，网络和大部分用户界面。 但是，要获得出色的应用程序-构建真正针对每个 `Apple` 平台量身定制的应用程序-您需要添加一些特定于平台的增强功能。 您的应用程序应如何在 `watchOS` 上使用 `Digital Crown`？ `tvOS` 上的“播放/暂停”按钮如何处理？ 还是在 `macOS` 上单击鼠标右键菜单？ 回答这些问题-并回答正确！ – 是构建出色的多平台体验的关键。 ================================================ FILE: example/cross-platform/demo2/Demo/Demo.xcodeproj/project.pbxproj ================================================ // 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"version" : 1 } } ================================================ FILE: example/cross-platform/demo2/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo2/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI struct ContentView: View { var body: some View { List(1..<51) { Text("\($0)") } .listStyle(SidebarListStyle()) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/cross-platform/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/cross-platform/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/cross-platform/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/cross-platform/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/cross-platform/demo2/README.md ================================================ 如何在 `macOS` 上获取半透明列表？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in macOS 11.6](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2011.6&color=lightgrey&logo=apple) macOS 的一个微妙但重要的功能是，当一个窗口处于活动状态时，侧边栏会自动变得稍微透明，然后在窗口移至背景时变为不透明，这是向用户的一个小提示，但该窗口还是有一点 展示他们的背景，让他们对周围环境有一点了解。 SwiftUI 允许我们使用 `List` 上的 `listStyle()` 修饰符创建这些半透明边栏，并传入 `SidebarListStyle()`，如下所示： ```swift List(1..<51) { Text("\($0)") } .listStyle(.sidebar) ``` 🚧 重要提示：如果您使用 `Xcode 12`，则需要使用 `SidebarListStyle()` 而不是 `.sidebar`。 没有什么可以阻止您将其与任何列表一起使用，但是线索就在名字中：它是专门为显示在主窗口侧面的列表而设计的，正如您在 `Xcode` 的导航器中所看到的那样。 🚧 注意：在 `iOS` 和 `iPadOS` 上，`.sidebar` 不提供半透明背景，但会影响单元格样式。 ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit App/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } 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"properties" : { "auto-scaling" : "auto" } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Graphic Large Rectangular.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 }, "properties" : { "auto-scaling" : "auto" } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Modular.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : "<=145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 }, "properties" : { "auto-scaling" : "auto" } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Utilitarian.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : "<=145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 }, "properties" : { "auto-scaling" : "auto" } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/ComplicationController.swift ================================================ // // ComplicationController.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/10/20. // import ClockKit class ComplicationController: NSObject, CLKComplicationDataSource { // MARK: - Complication Configuration func getComplicationDescriptors(handler: @escaping ([CLKComplicationDescriptor]) -> Void) { let descriptors = [ CLKComplicationDescriptor(identifier: "complication", displayName: "Demo", supportedFamilies: CLKComplicationFamily.allCases) // Multiple complication support can be added here with more descriptors ] // Call the handler with the currently supported complication descriptors handler(descriptors) } func handleSharedComplicationDescriptors(_ complicationDescriptors: [CLKComplicationDescriptor]) { // Do any necessary work to support these newly shared complication descriptors } // MARK: - Timeline Configuration func getTimelineEndDate(for complication: CLKComplication, withHandler handler: @escaping (Date?) -> Void) { // Call the handler with the last entry date you can currently provide or nil if you can't support future timelines handler(nil) } func getPrivacyBehavior(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationPrivacyBehavior) -> Void) { // Call the handler with your desired behavior when the device is locked handler(.showOnLockScreen) } // MARK: - Timeline Population func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) { // Call the handler with the current timeline entry handler(nil) } func getTimelineEntries(for complication: CLKComplication, after date: Date, limit: Int, withHandler handler: @escaping ([CLKComplicationTimelineEntry]?) -> Void) { // Call the handler with the timeline entries after the given date handler(nil) } // MARK: - Sample Templates func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) { // This method will be called once per supported complication, and the results will be cached handler(nil) } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/ContentView.swift ================================================ // // ContentView.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { var body: some View { List(1..<51) { Text("\($0)") } .listStyle(.carousel) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/DemoApp.swift ================================================ // // DemoApp.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct DemoApp: App { @SceneBuilder var body: some Scene { WindowGroup { NavigationView { ContentView() } } WKNotificationScene(controller: NotificationController.self, category: "myCategory") } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/Info.plist ================================================ NSExtension NSExtensionAttributes WKAppBundleIdentifier com.wangchujiang.Demo.watchkitapp NSExtensionPointIdentifier com.apple.watchkit ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/NotificationController.swift ================================================ // // NotificationController.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/10/20. // import WatchKit import SwiftUI import UserNotifications class NotificationController: WKUserNotificationHostingController { override var body: NotificationView { return NotificationView() } override func willActivate() { // This method is called when watch view controller is about to be visible to user super.willActivate() } override func didDeactivate() { // This method is called when watch view controller is no longer visible super.didDeactivate() } override func didReceive(_ notification: UNNotification) { // This method is called when a notification needs to be presented. // Implement it if you use a dynamic notification interface. // Populate your dynamic notification interface as quickly as possible. } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/NotificationView.swift ================================================ // // NotificationView.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct NotificationView: View { var body: some View { Text("Hello, World!") } } struct NotificationView_Previews: PreviewProvider { static var previews: some View { NotificationView() } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo3/Demo/Demo WatchKit Extension/PushNotificationPayload.apns ================================================ { "aps": { "alert": { "body": "Test message", "title": "Optional title", "subtitle": "Optional subtitle" }, "category": "myCategory", "thread-id": "5280" }, "WatchKit Simulator Actions": [ { "title": "First Button", "identifier": "firstButtonAction" } ], "customKey": "Use this file to define a testing payload for your notifications. The aps dictionary specifies the category, alert text and title. The WatchKit Simulator Actions array can provide info for one or more action buttons in addition to the standard Dismiss button. Any other top level keys are custom payload. If you have multiple such JSON files in your project, you'll be able to select them when choosing to debug the notification interface of your Watch App." } ================================================ FILE: example/cross-platform/demo3/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 55; objects = { /* Begin PBXBuildFile section */ 7DECCECF2720241300152B15 /* Demo WatchKit App.app in Embed Watch Content */ = {isa = PBXBuildFile; fileRef = 7DECCECE2720241300152B15 /* Demo WatchKit App.app */; settings = {ATTRIBUTES = (RemoveHeadersOnCopy, ); }; }; 7DECCED42720241500152B15 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 7DECCED32720241500152B15 /* Assets.xcassets */; }; 7DECCEDA2720241500152B15 /* Demo WatchKit Extension.appex in Embed App Extensions */ = {isa = PBXBuildFile; fileRef = 7DECCED92720241500152B15 /* Demo WatchKit Extension.appex */; settings = 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Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7DECCEC42720241300152B15 /* Project object */; } ================================================ FILE: example/cross-platform/demo3/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/cross-platform/demo3/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/cross-platform/demo3/Demo/Demo.xcodeproj/xcshareddata/xcschemes/Demo WatchKit App (Complication).xcscheme ================================================ ================================================ FILE: example/cross-platform/demo3/Demo/Demo.xcodeproj/xcshareddata/xcschemes/Demo WatchKit App (Notification).xcscheme ================================================ ================================================ FILE: example/cross-platform/demo3/Demo/Demo.xcodeproj/xcshareddata/xcschemes/Demo WatchKit App.xcscheme ================================================ ================================================ FILE: example/cross-platform/demo3/README.md ================================================ 如何在watchOS上制作轮播列表？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in watchOS 8](https://img.shields.io/static/v1?label=&message=New%20in%20watchOS%207&color=lightgrey&logo=apple) `watchOS` 有一种特别常见的列表样式，可以使用 `List` 轻松复制：列表中的行在移动到屏幕上时滑动并放大，然后在移出屏幕时滑动并缩小。 这对于更粗的图形行特别有效 - 它几乎就像 `Apple` 旧的 `Cover Flow` 效果。 要启用此轮播效果，请将 `.listStyle()` 修饰符与 `.carousel` 一起使用，如下所示： ```swift List(1..<51) { Text("\($0)") } .listStyle(.carousel) ``` 🚧 重要提示：如果您使用 `Xcode 12`，则需要使用 `CarouselListStyle()` 而不是 `.carousel`。 🚧 注意：这仅在 `watchOS` 上可用。 ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit App/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit App/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "role" : "notificationCenter", "scale" : "2x", "size" : "24x24", "subtype" : "38mm" }, { "idiom" : "watch", "role" : "notificationCenter", "scale" : "2x", "size" : "27.5x27.5", "subtype" : "42mm" }, { "idiom" : "watch", "role" : "companionSettings", "scale" : "2x", "size" : "29x29" }, { "idiom" : "watch", "role" : "companionSettings", "scale" : "3x", "size" : "29x29" }, { "idiom" : "watch", "role" : "appLauncher", "scale" : "2x", "size" : "40x40", "subtype" : "38mm" }, { "idiom" : "watch", "role" : "appLauncher", "scale" : "2x", "size" : "44x44", "subtype" : "40mm" }, { "idiom" : "watch", "role" : "appLauncher", "scale" : "2x", "size" : "50x50", "subtype" : "44mm" }, { "idiom" : "watch", "role" : "quickLook", "scale" : "2x", "size" : "86x86", "subtype" : "38mm" }, { "idiom" : "watch", "role" : "quickLook", "scale" : "2x", "size" : "98x98", "subtype" : "42mm" }, { "idiom" : "watch", "role" : "quickLook", "scale" : "2x", "size" : "108x108", "subtype" : "44mm" }, { "idiom" : "watch-marketing", "scale" : "1x", "size" : "1024x1024" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit App/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit App/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleDisplayName Demo WatchKit App CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown WKWatchKitApp ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Circular.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : "<=145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Contents.json ================================================ { "assets" : [ { "filename" : "Circular.imageset", "idiom" : "watch", "role" : "circular" }, { "filename" : "Extra Large.imageset", "idiom" : "watch", "role" : "extra-large" }, { "filename" : "Graphic Bezel.imageset", "idiom" : "watch", "role" : "graphic-bezel" }, { "filename" : "Graphic Circular.imageset", "idiom" : "watch", "role" : "graphic-circular" }, { "filename" : "Graphic Corner.imageset", "idiom" : "watch", "role" : "graphic-corner" }, { "filename" : "Graphic Extra Large.imageset", "idiom" : "watch", "role" : "graphic-extra-large" }, { "filename" : "Graphic Large Rectangular.imageset", "idiom" : "watch", "role" : "graphic-large-rectangular" }, { "filename" : "Modular.imageset", "idiom" : "watch", "role" : "modular" }, { "filename" : "Utilitarian.imageset", "idiom" : "watch", "role" : "utilitarian" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Extra Large.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : "<=145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Graphic Bezel.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Graphic Circular.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Graphic Corner.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Graphic Extra Large.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : "<=145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Graphic Large Rectangular.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Modular.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : "<=145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Complication.complicationset/Utilitarian.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "watch", "scale" : "2x", "screen-width" : "<=145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">161" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">145" }, { "idiom" : "watch", "scale" : "2x", "screen-width" : ">183" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/ComplicationController.swift ================================================ // // ComplicationController.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/3/21. // import ClockKit class ComplicationController: NSObject, CLKComplicationDataSource { // MARK: - Complication Configuration func getComplicationDescriptors(handler: @escaping ([CLKComplicationDescriptor]) -> Void) { let descriptors = [ CLKComplicationDescriptor(identifier: "complication", displayName: "Demo", supportedFamilies: CLKComplicationFamily.allCases) // Multiple complication support can be added here with more descriptors ] // Call the handler with the currently supported complication descriptors handler(descriptors) } func handleSharedComplicationDescriptors(_ complicationDescriptors: [CLKComplicationDescriptor]) { // Do any necessary work to support these newly shared complication descriptors } // MARK: - Timeline Configuration func getTimelineEndDate(for complication: CLKComplication, withHandler handler: @escaping (Date?) -> Void) { // Call the handler with the last entry date you can currently provide or nil if you can't support future timelines handler(nil) } func getPrivacyBehavior(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationPrivacyBehavior) -> Void) { // Call the handler with your desired behavior when the device is locked handler(.showOnLockScreen) } // MARK: - Timeline Population func getCurrentTimelineEntry(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTimelineEntry?) -> Void) { // Call the handler with the current timeline entry handler(nil) } func getTimelineEntries(for complication: CLKComplication, after date: Date, limit: Int, withHandler handler: @escaping ([CLKComplicationTimelineEntry]?) -> Void) { // Call the handler with the timeline entries after the given date handler(nil) } // MARK: - Sample Templates func getLocalizableSampleTemplate(for complication: CLKComplication, withHandler handler: @escaping (CLKComplicationTemplate?) -> Void) { // This method will be called once per supported complication, and the results will be cached handler(nil) } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/ContentView.swift ================================================ // // ContentView.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/3/21. // import SwiftUI struct ContentView: View { @State var scrollAmount = 0.0 var body: some View { Text("Scroll: \(scrollAmount)") .focusable(true) .digitalCrownRotation($scrollAmount, from: 1, through: 5, by: 0.1, sensitivity: .low, isContinuous: true, isHapticFeedbackEnabled: true) // .digitalCrownRotation($scrollAmount) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/DemoApp.swift ================================================ // // DemoApp.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { @SceneBuilder var body: some Scene { WindowGroup { NavigationView { ContentView() } } WKNotificationScene(controller: NotificationController.self, category: "myCategory") } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleDisplayName Demo WatchKit Extension CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 CLKComplicationPrincipalClass $(PRODUCT_MODULE_NAME).ComplicationController NSExtension NSExtensionAttributes WKAppBundleIdentifier demo.Demo.watchkitapp NSExtensionPointIdentifier com.apple.watchkit WKWatchOnly ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/NotificationController.swift ================================================ // // NotificationController.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/3/21. // import WatchKit import SwiftUI import UserNotifications class NotificationController: WKUserNotificationHostingController { override var body: NotificationView { return NotificationView() } override func willActivate() { // This method is called when watch view controller is about to be visible to user super.willActivate() } override func didDeactivate() { // This method is called when watch view controller is no longer visible super.didDeactivate() } override func didReceive(_ notification: UNNotification) { // This method is called when a notification needs to be presented. // Implement it if you use a dynamic notification interface. // Populate your dynamic notification interface as quickly as possible. } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/NotificationView.swift ================================================ // // NotificationView.swift // Demo WatchKit Extension // // Created by 王楚江 on 2021/3/21. // import SwiftUI struct NotificationView: View { var body: some View { Text("Hello, World!") } } struct NotificationView_Previews: PreviewProvider { static var previews: some View { NotificationView() } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/cross-platform/demo4/Demo/Demo WatchKit Extension/PushNotificationPayload.apns ================================================ { "aps": { "alert": { "body": "Test message", "title": "Optional title", "subtitle": "Optional subtitle" }, "category": "myCategory", "thread-id": "5280" }, "WatchKit Simulator Actions": [ { "title": "First Button", "identifier": "firstButtonAction" } ], "customKey": "Use this file to define a testing payload for your notifications. The aps dictionary specifies the category, alert text and title. The WatchKit Simulator Actions array can provide info for one or more action buttons in addition to the standard Dismiss button. Any other top level keys are custom payload. 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Project object */; } ================================================ FILE: example/cross-platform/demo4/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/cross-platform/demo4/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/cross-platform/demo4/README.md ================================================ 如何使用 `digitalCrownRotation()` 在 `watchOS` 上读取 `Digital Crown`？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in watchOS 8](https://img.shields.io/static/v1?label=&message=New%20in%20watchOS%207&color=lightgrey&logo=apple) `SwiftUI` 通过两个修饰符向我们的应用程序公开数字表冠，必须同时使用这两个修饰符才能将表冠用作我们应用程序的输入。 第一个是 `focusable()`，当您希望有问题的视图能够接收 `Digital Crown` 更新时，它应该为 `true`，而 `digitalCrownRotation()` 则在 `Digital Crown` 和您选择的属性之间创建绑定。 这是一个简单的示例，可帮助您入门： ```swift struct ContentView: View { @State var scrollAmount = 0.0 var body: some View { Text("Scroll: \(scrollAmount)") .focusable(true) .digitalCrownRotation($scrollAmount) } } ``` https://user-images.githubusercontent.com/1680273/138087654-3816683c-c965-416b-a29a-00a233794cc9.mp4 这将从负无穷大滚动到正无穷大，在文本视图中显示当前滚动值。 提示：如果将 `focusable()` 放在 `digitalCrownRotation()` 之后，您会发现它不再起作用。 `digitalCrownRotation()` 修饰符有几种其他形式，可以让您更好地控制其行为方式。 例如，最长的品种让我们： 这将从负无穷大滚动到正无穷大，在文本视图中显示当前滚动值。 提示：如果将 `focusable()` 放在 `digitalCrownRotation()` 之后，您会发现它不再起作用。 `digitalCrownRotation()` 修饰符还具有其他两种形式，可让您更好地控制其行为。 例如，最长的品种使我们： 1. `from` 和 `through` 设置滚动范围。 2. `by` 设置步进量，控制每次表冠转动时改变多少。 3. `sensitivity` 决定了表冠需要移动多少才能触发变化。 4. `isContinuous` 确定该值在达到最小值或最大值时是否回绕，或者是否仅在这些边界处停止。 5. `isHapticFeedbackEnabled` 确定是否在转弯时触发触觉反馈。 例如，此修改器以 `0.1` 的增量从 `1` 到 `5` 步进，灵敏度较低，从头到尾环绕，带有触觉反馈： ```swift .digitalCrownRotation($scrollAmount, from: 1, through: 5, by: 0.1, sensitivity: .low, isContinuous: true, isHapticFeedbackEnabled: true) ``` https://user-images.githubusercontent.com/1680273/138087702-1eb0c2bf-08b6-4ebe-80d2-42e46c56476a.mp4 ================================================ FILE: example/data/demo1/README.md ================================================ 在 SwiftUI 中使用 Core Data 的简介 === 作为 Apple 软件平台的两个重要组成部分，得知 `Core Data` 和 SwiftUI 可以很好地协同工作就不会让您感到惊讶：我们获得了属性包装器，环境支持等，所有这些都确保我们可以集成 `Core Data` 轻松地加入我们的 `SwiftUI` 应用程序。 在 `SwiftUI` 之前，通常会发现从架构的角度来看您会发现正在使用 `Core Data` 的多种方法 - Apple 强烈鼓励我们在 `AppDelegate` 级别创建容器，然后根据需要进行备份，其他人则首选使用管理器类，还有一些人更喜欢完全将 `Core Data` 提取出来，以便他们以后可以自由地迁移到Realm或其他选项。 但是，SwiftUI 与 `Core Data` 的集成是不同的，因为它在一个方向上指向很强：在应用启动时创建一次 `Core Data` 容器，将其托管对象上下文注入环境，然后直接在该环境中执行获取请求。 这不是我的猜测-Apple实际上是按照高度特定的方式进行设计的，如果您想利用SwiftUI的Core Data集成的所有功能，那么您应该遵循Apple为我们铺就的道路。 以下是这四个特定功能，它们将帮助您理解我的意思： 1. `NSManagedObject` 符合 `ObservableObject` 协议，这意味着我们可以将任何对象绑定到用户界面的一部分。 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} ================================================ FILE: example/data/demo10/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo10/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI struct ContentView: View { @Binding var document: TextFile @State private var showingExporter: Bool = false var body: some View { VStack { TextEditor(text: $document.text) } .toolbar { ToolbarItem(placement: .confirmationAction) { Button(action: { // document.fileWrapper(configuration: <#T##TextFile.WriteConfiguration#>) // let filePath = NSTemporaryDirectory() + "test.txt" // let outputText = "Hello World!" // do { // try outputText.write(toFile: filePath, atomically: true, encoding: .utf8) // print("测试文件已生成 \(filePath)") // } catch let error { // print(error) // } print("\($document.text.wrappedValue)") self.showingExporter.toggle() }) { Label("File Exporter", systemImage: "doc.badge.plus") } } } .fileExporter( isPresented: $showingExporter, document: TextFile(), contentType: .plainText, onCompletion: { (result) in self.showingExporter.toggle() if case .success(let url) = result { print("Success \(url)") // print("--> \(NSTemporaryDirectory())") // print("--3> \( url.relativeString)") // let filePath = NSURL.fileURL(withPath: "\(url)") // let outputText = "Hello World!"// "H: \($document.text.wrappedValue)" } else { print("Failure") } } ) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView(document: .constant(TextFile())) } } ================================================ FILE: example/data/demo10/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI @main struct DemoApp: App { var body: some Scene { DocumentGroup(newDocument: TextFile()) { file in ContentView(document: file.$document) } } } ================================================ FILE: example/data/demo10/Demo/Shared/TextFile.swift ================================================ // // TextFile.swift // Demo // // Created by 王楚江 on 2021/3/22. // import SwiftUI import UniformTypeIdentifiers struct TextFile: FileDocument { // 告诉系统我们仅支持纯文本 static var readableContentTypes = [UTType.plainText] // 默认情况下，您的文档为空 var text = "" // 创建新的空文档的简单初始化程序 init(initialText: String = "") { text = initialText } // 此初始化程序加载以前保存的数据 init(configuration: ReadConfiguration) throws { if let data = configuration.file.regularFileContents { text = String(decoding: data, as: UTF8.self) } } // 当系统要将数据写入磁盘时，将调用此方法 func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper { let data = Data(text.utf8) return FileWrapper(regularFileWithContents: data) } } ================================================ FILE: example/data/demo10/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/data/demo10/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/data/demo10/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-write com.apple.security.files.bookmarks.app-scope ================================================ FILE: example/data/demo10/README.md ================================================ 如何使用 `fileExporter()` 导出文件？ === SwiftUI 具有 `fileExporter()` 修饰符，使我们可以将应用程序中的文件导出到用户想要的任何位置 - iCloud中或其本地设备上的任何文件夹。 使用它需要几个步骤，因为您必须首先创建一个您的应用程序可以使用的文档类型。 我假设您已经做完了，所以我们可以专注于 `fileExporter()`，但是如果您还没有创建文档类型，请参阅本文的结尾–我将在此处提供示例。 首先，您需要某种状态来跟踪何时要显示或不显示导出器UI。 这是一个简单的布尔值，因此您将使用以下代码： ```swift @State private var showingExporter = false ``` 下一步是将 `fileExporter()` 修饰符添加到视图层次结构中的某个位置，传递刚刚创建的布尔状态，要导出的文档以及该文档具有的内容类型。 有用的是，`document` 参数是可选的，因此您无需始终设置此参数。 但是，为了使导出器 `UI` 出现，必须设置文档，并且状态 `Boolean` 必须为`true` – 两者都需要。 导出操作完成后，文件导出器将运行您选择的回调函数，并传入一个 `Result` 对象，该对象包含保存文件的 `URL` 或错误。 因此，您可以将这种修饰符添加到视图层次结构中： ```swift .fileExporter(isPresented: $showingExporter, document: TextFile(), contentType: .plainText) { result in switch result { case .success(let url): print("Saved to \(url)") case .failure(let error): print(error.localizedDescription) } } ``` 注意：我将 `.plainText` 用作内容类型，但是应该与您在文档类型上设置的内容类型之一匹配。 这就是导出文件所需要的全部，但是万一您遗漏了此文件，我想提供一个示例文档类型，可以在此处使用。 首先，您需要添加一个新的导入，以便可以声明您的文档可以用作以下内容类型： ```swift import UniformTypeIdentifiers ``` 现在，您需要创建某种符合 `FileDocument` 协议的类型。 这并不需要很多，但是您确实需要告诉 `SwiftUI` 如何加载和保存文件，并为它提供一个初始化程序，该初始化程序能够根据需要创建新实例。 这是一个示例，并附有注释以解释其全部功能： ```swift struct TextFile: FileDocument { // 告诉系统我们仅支持纯文本 static var readableContentTypes = [UTType.plainText] // 默认情况下，您的文档为空 var text = "" // 创建新的空文档的简单初始化程序 init(initialText: String = "") { text = initialText } // 此初始化程序加载以前保存的数据 init(configuration: ReadConfiguration) throws { if let data = configuration.file.regularFileContents { text = String(decoding: data, as: UTF8.self) } } // 当系统要将数据写入磁盘时，将调用此方法 func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper { let data = Data(text.utf8) return FileWrapper(regularFileWithContents: data) } } ``` 注意：需要编辑 `Demo/macOS/macOS.entitlements` 添加如下配置，到你的 `macOS.entitlements` 的配置中，获取文件的读写权限。 ```xml com.apple.security.files.user-selected.read-write com.apple.security.files.bookmarks.app-scope ``` ================================================ FILE: example/data/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo11/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello, world!") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/data/demo11/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/23. // import SwiftUI import CoreSpotlight @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() .onContinueUserActivity(CSSearchableItemActionType, perform: handleSpotlight) } } func handleSpotlight(_ userActivity: NSUserActivity) { if let id = userActivity.userInfo?[CSSearchableItemActivityIdentifier] as? String { print("--> Found identifier \(id)") } } } ================================================ FILE: example/data/demo11/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/data/demo11/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/data/demo11/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/data/demo11/README.md ================================================ 如何在 `SwiftUI` 中继续 `NSUserActivity`？ === SwiftUI 具有专用的 `onContinueUserActivity()`修饰符，可以捕获各种 `NSUserActivity` 类型 - 从 Web 单击，从 `Spotlight` 或 `Siri` 启动等等。 以前，您可能使用诸如 `application(_:continue: restorationHandler :)` 之类的东西在 `AppDelegate` 中进行了处理，但是 `SwiftUI` 的方法更细粒度，使我们可以更轻松地划分功能。 要实现此目的，请首先创建一个将接受 `NSUserActivity` 的函数。 您无需在 `App` 结构中执行此操作，但是这样做很有意义，因为您可以在程序的其余部分中将其路由到任何需要的地方。 例如，此函数检查是否从 `Spotlight` 中传入了我们的数据，如果是，则提取出唯一标识符，以便您可以在数据源中查找它： ```swift func handleSpotlight(_ userActivity: NSUserActivity) { if let id = userActivity.userInfo?[CSSearchableItemActivityIdentifier] as? String { print("Found identifier \(id)") } } ``` 注意：不需要检查 `activityType` 属性，因为它将在我们的下一个代码中由 `SwiftUI` 过滤。 现在，您可以像这样修改 `App` 结构，将其附加到主应用的视图中： ```swift WindowGroup { ContentView() .onContinueUserActivity(CSSearchableItemActionType, perform: handleSpotlight) } ``` 当然，这仅仅是处理用户活动的基本要素 – 您已经检测到该活动并且您的代码已运行，但是现在您需要以某种方式完成响应该事件的实际工作。 如果不确定从哪里开始，则可能应该使 `handleSpotlight()` 在驱动UI的程序中设置一些共享状态，例如导致显示详细视图。 ================================================ FILE: example/data/demo12/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo12/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo12/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo12/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/10/21. // import SwiftUI import CoreLocation import CoreLocationUI class LocationManager: NSObject, ObservableObject, CLLocationManagerDelegate { let manager = CLLocationManager() @Published var location: CLLocationCoordinate2D? override init() { super.init() manager.delegate = self } func requestLocation() { manager.requestLocation() } func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) { location = locations.first?.coordinate } } struct ContentView: View { @StateObject var locationManager = LocationManager() var body: some View { VStack { if let location = locationManager.location { Text("Your location: \(location.latitude), \(location.longitude)") } if #available(iOS 15.0, *) { LocationButton { locationManager.requestLocation() } .frame(height: 44) .padding() LocationButton(.shareMyCurrentLocation) { locationManager.requestLocation() } .frame(height: 44) .padding() } else { // Fallback on earlier versions } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/data/demo12/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/10/21. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/data/demo12/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo12/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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Programmer" } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return controller }() func save() { let context = container.viewContext if context.hasChanges { do { try context.save() } catch { let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") // Show some error here } } } // 用于加载 Core Data 的初始化程序，可以选择使用内存中的存储区。 init(inMemory: Bool = false) { // 如果您没有为模型 Main 命名，则需要在下面更改此名称。 container = NSPersistentContainer(name: "Main") if inMemory { container.persistentStoreDescriptions.first?.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores { description, error in if let error = error { // 用代码替换此实现，以适当地处理错误。 // fatalError() 使应用程序生成崩溃日志并终止。 尽管此功能在开发过程中可能很有用，但您不应在运输应用程序中使用此功能。 /* 出现错误的典型原因包括： * 父目录不存在，无法创建或不允许写入。 * 由于设备被锁定时的权限或数据保护，无法访问持久性存储。 * 设备空间不足。 * 无法将 store could 迁移到当前模型版本。 检查错误消息，以确定实际的问题是什么。 */ fatalError("Error: \(error.localizedDescription)") } } } } ================================================ FILE: example/data/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/data/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/data/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/data/demo2/README.md ================================================ 如何配置核心数据以与 `SwiftUI` 一起使用？ === 如果您创建一个新项目并同时检查 `SwiftUI` 和 `Core Data`，则 Xcode 可以很好地帮助您实现有效的配置。具体来说，它： 1. 使用示例配置创建一个空的 `YourProjectName.xcdatamodeld` 模型文件。 2. 添加一个 `Persistence.swift` 文件，该文件将 `Core Data` 整齐地包装在一个位置。 3. 使用 `managedObjectContext` 键将上下文注入到初始内容视图的环境中。 4. 在 `ContentView` 中提供示例代码以创建，读取和删除示例数据。 这为我们提供了在 `SwiftUI` 中使用核心数据提取请求的完整功能。 但是，如果您不使用 `Core Data` 模板，或者只是好奇 `Core Data` 模板为我们做了什么，那么值得简要介绍一下在您的应用中设置支持所需的步骤。我还将为您提供一些示例数据，以便您可以尝试本书的后续章节。 第一步是通过按 `Cmd + N` 创建一个新文件，然后选择 `Core Data` 来创建核心数据模型。该模型的名称很重要，因为它将很快在您的代码中使用。除非您打算使用复杂的 `Core Data` 配置，否则为模型 `Main` 命名是很好的 - 这就是我将在此处使用的名称。建立模型后，就可以继续创建要在应用程序中使用的任何实体。 ![](imgs/1.png) 出于示例目的，我们需要一些一致的数据来使用，以便我为您提供有意义的代码。因此，打开 `xcdatamodeld` 文件并创建一个名为 `ProgrammingLanguage` 的实体，该实体具有两个字符串属性：`name` 和 `creator`。显然，您并不需要完全具有这个实体和属性集合，因此在您进行操作时，只要在头脑上用自己的 `Core Data` 设置替换我的示例即可。 ![](imgs/2.png) 其次，您需要在某个地方加载和管理核心数据配置。 Apple 的模板使用 `Persistence` 单例来完成此任务，这是一个不错的解决方案，因为它足以使 `Core Data` 启动并运行，同时还提供了为 `SwiftUI` 制作预览上下文的功能。 因此，创建一个名为 `Persistence.swift` 的新文件，并提供以下代码： ```swift struct Persistence { // 一个单例供我们的整个应用程序使用 static let shared = Persistence() // 存储核心数据 let container: NSPersistentContainer // SwiftUI预览的测试配置 static var preview: Persistence = { let controller = Persistence(inMemory: true) // 创建10种示例编程语言。 for _ in 0..<10 { let language = ProgrammingLanguage(context: controller.container.viewContext) language.name = "Example Language 1" language.creator = "A. Programmer" } return controller }() // 用于加载 Core Data 的初始化程序，可以选择使用内存中的存储区。 init(inMemory: Bool = false) { // 如果您没有为模型 Main 命名，则需要在下面更改此名称。 container = NSPersistentContainer(name: "Main") if inMemory { container.persistentStoreDescriptions.first?.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores { description, error in if let error = error { // 用代码替换此实现，以适当地处理错误。 // fatalError() 使应用程序生成崩溃日志并终止。 尽管此功能在开发过程中可能很有用，但您不应在运输应用程序中使用此功能。 /* 出现错误的典型原因包括： * 父目录不存在，无法创建或不允许写入。 * 由于设备被锁定时的权限或数据保护，无法访问持久性存储。 * 设备空间不足。 * 无法将 store could 迁移到当前模型版本。 检查错误消息，以确定实际的问题是什么。 */ fatalError("Error: \(error.localizedDescription)") } } } } ``` 该代码的内存中存储部分很重要，因为当您配置 `Core Data` 将信息保存到内存而不是磁盘中时，这意味着您所做的所有更改都将在程序结束时被丢弃。 第三，在您的 `Persistence` 类中添加一个 `save()` 方法，以便它检查上下文是否已更改，并在需要时提交更改。 ```swift func save() { let context = container.viewContext if context.hasChanges { do { try context.save() } catch { let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") // Show some error here } } } ``` 第四，您需要将 `Core Data` 容器的托管对象上下文注入 `SwiftUI` 环境。 这需要两个较小的步骤，都在 `YourProjectNameApp.swift` 文件中。 首先，为您的应用程序 `struct` 提供一个属性来存储持久性控制器： ```swift let Persistence = Persistence.shared ``` 然后使用 `environment()` 修饰符将新的 `Core Data` 视图上下文附加到环境中的 `managedObjectContext` 键： ```swift ContentView() .environment(\.managedObjectContext, Persistence.container.viewContext) ``` 最后一步是可选的，但建议这样做：当您的应用程序移至后台时，您应该调用我们刚才编写的 `save()` 方法，以便 `Core Data` 永久保存您的更改。 在 `SwiftUI` 中，这是通过向我们的应用程序结构添加属性来监视场景阶段来完成的： ```swift @Environment(\.scenePhase) var scenePhase ``` 然后，您可以监视该更改，并每次都调用 `save()`： ```swift import SwiftUI @main struct DemoApp: App { let persistenceController = Persistence.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } // .onChange(of: scenePhase) { _ in // persistenceController.save() // } } } ``` 在 `ContentView` 中提供示例代码以创建，读取并通过按钮添加一条数据 ```swift import SwiftUI import CoreData struct ContentView: View { @Environment(\.managedObjectContext) private var viewContext @FetchRequest( sortDescriptors: [NSSortDescriptor(keyPath: \ProgrammingLanguage.name, ascending: true)], animation: .default) private var items: FetchedResults var body: some View { NavigationView { List { ForEach(items) { item in if (item.name != nil) { Text("Item at \(item.name!)") } } } .toolbar { Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } } private func addItem() { let language = ProgrammingLanguage(context: viewContext) language.name = "Example Language 1" language.creator = "A. 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rootObject = 7D7C8B4A2606872B00F97ED3 /* Project object */; } ================================================ FILE: example/data/demo3/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/data/demo3/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/data/demo3/Demo/Shared/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo3/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" }, { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo3/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo3/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI import CoreData struct ContentView: View { @Environment(\.managedObjectContext) private var viewContext @FetchRequest( sortDescriptors: [NSSortDescriptor(keyPath: \Item.timestamp, ascending: true)], animation: .default) private var items: FetchedResults var body: some View { List { ForEach(items) { item in Text("Item at \(item.timestamp!, formatter: itemFormatter)") } .onDelete(perform: deleteItems) } .toolbar { #if os(iOS) EditButton() #endif Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } private func addItem() { withAnimation { let newItem = Item(context: viewContext) newItem.timestamp = Date() do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } private func deleteItems(offsets: IndexSet) { withAnimation { offsets.map { items[$0] }.forEach(viewContext.delete) do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } } private let itemFormatter: DateFormatter = { let formatter = DateFormatter() formatter.dateStyle = .short formatter.timeStyle = .medium return formatter }() struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) } } ================================================ FILE: example/data/demo3/Demo/Shared/Demo.xcdatamodeld/.xccurrentversion ================================================ _XCCurrentVersionName Shared.xcdatamodel ================================================ FILE: example/data/demo3/Demo/Shared/Demo.xcdatamodeld/Shared.xcdatamodel/contents ================================================ ================================================ FILE: example/data/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { let persistenceController = PersistenceController.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } } } ================================================ FILE: example/data/demo3/Demo/Shared/Persistence.swift ================================================ // // Persistence.swift // Shared // // Created by 王楚江 on 2021/3/21. // import CoreData struct PersistenceController { static let shared = PersistenceController() static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext for _ in 0..<10 { let newItem = Item(context: viewContext) newItem.timestamp = Date() } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() let container: NSPersistentContainer init(inMemory: Bool = false) { container = NSPersistentContainer(name: "Demo") if inMemory { container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device is locked. * The device is out of space. * The store could not be migrated to the current model version. 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"Unknown") } .onDelete(perform: deleteItems) } .toolbar { #if os(iOS) EditButton() #endif Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } private func addItem() { withAnimation { let newItem = ProgrammingLanguage(context: viewContext) newItem.name = "test" do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } private func deleteItems(offsets: IndexSet) { withAnimation { offsets.map { items[$0] }.forEach(viewContext.delete) do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) } } ================================================ FILE: example/data/demo4/Demo/Shared/Demo.xcdatamodeld/.xccurrentversion ================================================ _XCCurrentVersionName Shared.xcdatamodel ================================================ FILE: example/data/demo4/Demo/Shared/Demo.xcdatamodeld/Shared.xcdatamodel/contents ================================================ ================================================ FILE: example/data/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/21. // import SwiftUI @main struct DemoApp: App { let persistenceController = PersistenceController.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } } } ================================================ FILE: example/data/demo4/Demo/Shared/Persistence.swift ================================================ // // Persistence.swift // Shared // // Created by 王楚江 on 2021/3/21. // import CoreData struct PersistenceController { static let shared = PersistenceController() static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext for _ in 0..<10 { let language = ProgrammingLanguage(context: viewContext) language.name = "Example Language 1" language.creator = "A. Programmer" } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() let container: NSPersistentContainer init(inMemory: Bool = false) { container = NSPersistentContainer(name: "Demo") if inMemory { container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device is locked. * The device is out of space. * The store could not be migrated to the current model version. 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Programmer" do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } private func deleteItems(offsets: IndexSet) { withAnimation { offsets.map { items[$0] }.forEach(viewContext.delete) do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) } } ================================================ FILE: example/data/demo5/Demo/Shared/Demo.xcdatamodeld/.xccurrentversion ================================================ _XCCurrentVersionName Shared.xcdatamodel ================================================ FILE: example/data/demo5/Demo/Shared/Demo.xcdatamodeld/Shared.xcdatamodel/contents ================================================ ================================================ FILE: example/data/demo5/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI @main struct DemoApp: App { let persistenceController = PersistenceController.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } } } ================================================ FILE: example/data/demo5/Demo/Shared/Persistence.swift ================================================ // // Persistence.swift // Shared // // Created by 王楚江 on 2021/3/22. // import CoreData struct PersistenceController { static let shared = PersistenceController() static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext for _ in 0..<10 { let language = ProgrammingLanguage(context: viewContext) language.name = "Example Language 1" language.creator = "A. Programmer" } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() let container: NSPersistentContainer init(inMemory: Bool = false) { container = NSPersistentContainer(name: "Demo") if inMemory { container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device is locked. * The device is out of space. * The store could not be migrated to the current model version. 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path = Demo.xcdatamodeld; sourceTree = ""; versionGroupType = wrapper.xcdatamodel; }; /* End XCVersionGroup section */ }; rootObject = 7DB95F1F2607C3F7005A7F30 /* Project object */; } ================================================ FILE: example/data/demo6/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/data/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/data/demo6/Demo/Shared/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo6/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" }, { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo6/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/data/demo6/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI import CoreData struct ContentView: View { @Environment(\.managedObjectContext) private var viewContext @FetchRequest( sortDescriptors: [ NSSortDescriptor(keyPath: \ProgrammingLanguage.name, ascending: true) ], animation: .default) private var items: FetchedResults var body: some View { List { ForEach(items) { language in Text(language.name ?? "Unknown") } .onDelete(perform: deleteItems) } .toolbar { #if os(iOS) EditButton() #endif Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } private func addItem() { withAnimation { let language = ProgrammingLanguage(context: viewContext) language.name = "Python" language.creator = "Guido van Rossum" do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } private func deleteItems(offsets: IndexSet) { withAnimation { offsets.map { items[$0] }.forEach(viewContext.delete) do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } } private let itemFormatter: DateFormatter = { let formatter = DateFormatter() formatter.dateStyle = .short formatter.timeStyle = .medium return formatter }() struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) } } ================================================ FILE: example/data/demo6/Demo/Shared/Demo.xcdatamodeld/.xccurrentversion ================================================ _XCCurrentVersionName Shared.xcdatamodel ================================================ FILE: example/data/demo6/Demo/Shared/Demo.xcdatamodeld/Shared.xcdatamodel/contents ================================================ ================================================ FILE: example/data/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI @main struct DemoApp: App { let persistenceController = PersistenceController.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } } } ================================================ FILE: example/data/demo6/Demo/Shared/Persistence.swift ================================================ // // Persistence.swift // Shared // // Created by 王楚江 on 2021/3/22. // import CoreData struct PersistenceController { static let shared = PersistenceController() static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext for _ in 0..<10 { let language = ProgrammingLanguage(context: viewContext) language.name = "Example Language 1" language.creator = "A. Programmer" } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() let container: NSPersistentContainer init(inMemory: Bool = false) { container = NSPersistentContainer(name: "Demo") if inMemory { container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device is locked. * The device is out of space. * The store could not be migrated to the current model version. Check the error message to determine what the actual problem was. */ fatalError("Unresolved error \(error), \(error.userInfo)") } }) } } ================================================ FILE: example/data/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/data/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/data/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/data/demo6/README.md ================================================ 如何从 SwiftUI 视图添加 `Core Data` 对象？ === 在 `SwiftUI` 中将核心数据对象保存在 `SwiftUI` 之外的方式与之完全相同：访问托管对象上下文，在该上下文中创建您的类型的实例，然后在准备好后保存该上下文。 如果您按照我的 `Core Data` 和 `SwiftUI` 设置说明进行操作，那么您已经将托管对象上下文注入到 `SwiftUI` 环境中。 在需要创建 `Core Data` 对象的任何地方，都应该向 `ContentView` 添加 `@Environment` 属性，以立即读取托管对象的上下文： ```swift @Environment(\.managedObjectContext) var managedObjectContext ``` 接下来，继续引用您的 `ManagedObjectContext`，在任何需要的地方创建您的 `Core Data` 实体类的实例。 在我的示例设置中，我们有一个带有名称和创建者属性的 `ProgrammingLanguage` 实体，因此我们可以在 `SwiftUI` 按钮操作中创建其中一个实体，如下所示： ```swift Button("Insert example language") { let language = ProgrammingLanguage(context: managedObjectContext) language.name = "Python" language.creator = "Guido van Rossum" // more code here } ``` 最后，在适当的时候保存上下文 - 在添加对象组之后，应用程序状态更改时等等，可能会立即保存上下文。 如果您使用的是之前的 `PersistenceController` 设置代码，请在此替换 //更多代码： ```swift PersistenceController.shared.saveContext() ``` 如果不是这样，请改用以下代码： ```swift do { try managedObjectContext.save() } catch { // 处理 `Core Data` 错误 // 用代码替换此实现，以适当地处理错误。 // fatalError() 使应用程序生成崩溃日志并终止。 尽管此功能在开发过程中可能很有用，但您不应在生产应用程序中使用此功能。 let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } ``` 请记住，对于不是直接在创建新对象之后进行的常规保存，通常值得添加检查以查看托管对象上下文是否有任何更改： ```swift if managedObjectContext.hasChanges { ``` ================================================ FILE: example/data/demo7/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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"Anonymous")") Button("Del Item", action: { removeLanguages(at: [index]) print("test \(index)") }) } } .onDelete(perform: removeLanguages) } .toolbar { #if os(iOS) EditButton() #endif Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } private func removeLanguages(at offsets: IndexSet) { for index in offsets { let language = items[index] viewContext.delete(language) } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } private func addItem() { withAnimation { let language = ProgrammingLanguage(context: viewContext) language.name = "Python" language.creator = "Guido van Rossum" do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } private func deleteItems(offsets: IndexSet) { withAnimation { offsets.map { items[$0] }.forEach(viewContext.delete) do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } } private let itemFormatter: DateFormatter = { let formatter = DateFormatter() formatter.dateStyle = .short formatter.timeStyle = .medium return formatter }() struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) } } ================================================ FILE: example/data/demo7/Demo/Shared/Demo.xcdatamodeld/.xccurrentversion ================================================ _XCCurrentVersionName Shared.xcdatamodel ================================================ FILE: example/data/demo7/Demo/Shared/Demo.xcdatamodeld/Shared.xcdatamodel/contents ================================================ ================================================ FILE: example/data/demo7/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI @main struct DemoApp: App { let persistenceController = PersistenceController.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } } } ================================================ FILE: example/data/demo7/Demo/Shared/Persistence.swift ================================================ // // Persistence.swift // Shared // // Created by 王楚江 on 2021/3/22. // import CoreData struct PersistenceController { static let shared = PersistenceController() static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext for _ in 0..<10 { let language = ProgrammingLanguage(context: viewContext) language.name = "Example Language 1" language.creator = "A. Programmer" } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() let container: NSPersistentContainer init(inMemory: Bool = false) { container = NSPersistentContainer(name: "Demo") if inMemory { container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device is locked. * The device is out of space. * The store could not be migrated to the current model version. 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"Anonymous")") Button("Del Item", action: { removeLanguages(at: [index]) }) } } .onDelete(perform: removeLanguages) } .toolbar { #if os(iOS) EditButton() #endif Button(action: addItem) { Label("Add Item", systemImage: "plus") } } ``` 最后，将 `removeLanguages()` 方法添加到您的 `SwiftUI` 视图。 这应该接受一个 `IndexSet`，它是应该删除的唯一整数索引的集合： ```swift func removeLanguages(at offsets: IndexSet) { for index in offsets { let language = languages[index] managedObjectContext.delete(language) } } ``` 您可能需要在此时保存您的 `Core Data` 上下文，在这种情况下，在 `for` 循环完成之后添加以下内容： ```swift do { try managedObjectContext.save() } catch { // handle the Core Data error } ``` 或者，如果您使用的是 `PersistenceController` 设置代码，请使用以下代码： ```swift PersistenceController.shared.saveContext() ``` 只需添加 `onDelete()` 修饰符就足以在表行上进行滑动删除，但是如果您还希望使用 `Edit/Done` 按钮来切换编辑模式，则应将此修饰符添加到 `NavigationView` 内部的任何内容上： ```swift .toolbar { EditButton() } ``` ================================================ FILE: example/data/demo8/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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"-") Creator: \(_languages.wrappedValue[index].creator ?? "Anonymous")") Button("Del Item", action: { print(index) deleteItems(offsets: [index]) }) } } } List { ForEach(items.indices, id: \.self) { index in HStack { Text("\(index) Creator: \(items[index].creator ?? "Anonymous")") Button("Del Item", action: { print(index) deleteItems(offsets: [index]) }) } } .onDelete(perform: deleteItems) } .toolbar { #if os(iOS) EditButton() #endif Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } } private func removeLanguages(at offsets: IndexSet) { for index in offsets { let language = items[index] viewContext.delete(language) } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } private func addItem() { withAnimation { let language = ProgrammingLanguage(context: viewContext) language.name = "Example Language 1" language.creator = "A. Programmer" do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } private func deleteItems(offsets: IndexSet) { for index in offsets { print(":::: \(index)") let language = items[index] viewContext.delete(language) } // offsets.map { items[$0] }.forEach(viewContext.delete) do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext) } } ================================================ FILE: example/data/demo8/Demo/Shared/Demo.xcdatamodeld/.xccurrentversion ================================================ _XCCurrentVersionName Shared.xcdatamodel ================================================ FILE: example/data/demo8/Demo/Shared/Demo.xcdatamodeld/Shared.xcdatamodel/contents ================================================ ================================================ FILE: example/data/demo8/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI @main struct DemoApp: App { let persistenceController = PersistenceController.shared var body: some Scene { WindowGroup { ContentView() .environment(\.managedObjectContext, persistenceController.container.viewContext) } } } ================================================ FILE: example/data/demo8/Demo/Shared/Persistence.swift ================================================ // // Persistence.swift // Shared // // Created by 王楚江 on 2021/3/22. // import CoreData struct PersistenceController { static let shared = PersistenceController() static var preview: PersistenceController = { let result = PersistenceController(inMemory: true) let viewContext = result.container.viewContext for _ in 0..<10 { let language = ProgrammingLanguage(context: viewContext) language.name = "Example Language 1" language.creator = "A. Programmer" } do { try viewContext.save() } catch { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. let nsError = error as NSError fatalError("Unresolved error \(nsError), \(nsError.userInfo)") } return result }() let container: NSPersistentContainer init(inMemory: Bool = false) { container = NSPersistentContainer(name: "Demo") if inMemory { container.persistentStoreDescriptions.first!.url = URL(fileURLWithPath: "/dev/null") } container.loadPersistentStores(completionHandler: { (storeDescription, error) in if let error = error as NSError? { // Replace this implementation with code to handle the error appropriately. // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development. /* Typical reasons for an error here include: * The parent directory does not exist, cannot be created, or disallows writing. * The persistent store is not accessible, due to permissions or data protection when the device is locked. * The device is out of space. * The store could not be migrated to the current model version. Check the error message to determine what the actual problem was. */ fatalError("Unresolved error \(error), \(error.userInfo)") } }) } } ================================================ FILE: example/data/demo8/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/data/demo8/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/data/demo8/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/data/demo8/README.md ================================================ 如何限制获取请求中的项目数？ === `SwiftUI` 的 `@FetchRequest` 属性包装器非常适合对对象进行简单的请求，同时提供排序和过滤功能。 但是，如果您要调整退回的商品数量-也许要说“向我显示结果中的前10个商品”，那么您需要自己做更多的工作。 首先，创建没有初始值的 `@FetchRequest` 属性。 例如，如果我们想使用 `ProgrammingLanguage` 实体，则可以使用以下方法： ```swift @FetchRequest var languages: FetchedResults ``` 现在，为您的视图创建一个自定义初始化程序，该初始化程序使用 `NSFetchRequest` 来构建所需的确切请求。 准备就绪后，您可以将其放入常规的 `FetchRequest` 中，并将其直接分配给您的媒体资源。 例如，如果我们想在不进行任何排序或过滤的情况下阅读前 `10` 种编程语言，则可以使用以下代码： ```swift init() { let request: NSFetchRequest = ProgrammingLanguage.fetchRequest() request.fetchLimit = 10 _languages = FetchRequest(fetchRequest: request) } ``` 或者，如果我们想要过滤，排序和行限制，我们也可以这样做： ```swift init() { let request: NSFetchRequest = ProgrammingLanguage.fetchRequest() request.predicate = NSPredicate(format: "active = true") request.sortDescriptors = [ NSSortDescriptor(keyPath: \ProgrammingLanguage.name, ascending: true) ] request.fetchLimit = 10 _languages = FetchRequest(fetchRequest: request) } ``` ================================================ FILE: example/data/demo9/Demo/Demo.xcodeproj/project.pbxproj 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ContentView.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI struct ContentView: View { @Binding var document: TextFile var body: some View { VStack() { TextEditor(text: $document.text) .frame(maxWidth: .infinity) // .frame(height: NSScreen.main.bounds.height) .foregroundColor(.white) .background(Color(#colorLiteral(red: 0.06274510175, green: 0, blue: 0.1921568662, alpha: 1))) .zIndex(2) Spacer() } .background(Color(#colorLiteral(red: 0.7856134772, green: 0.8419756293, blue: 0.9575102925, alpha: 1))) .edgesIgnoringSafeArea(.all) .navigationTitle("Redactor") } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView(document: .constant(TextFile())) } } ================================================ FILE: example/data/demo9/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/22. // import SwiftUI @main struct DemoApp: App { var body: some Scene { DocumentGroup(newDocument: TextFile()) { file in ContentView(document: file.$document) } // WindowGroup { // ContentView() // } } } ================================================ FILE: example/data/demo9/Demo/Shared/TextFile.swift ================================================ // // TextFile.swift // Demo // // Created by 王楚江 on 2021/3/22. // import SwiftUI import UniformTypeIdentifiers struct TextFile: FileDocument { // 告诉系统我们仅支持纯文本 static var readableContentTypes = [UTType.plainText] // 默认情况下，您的文档为空 var text = "" // 创建新的空文档的简单初始化程序 init(initialText: String = "") { text = initialText } // 此初始化程序加载以前保存的数据 init(configuration: ReadConfiguration) throws { if let data = configuration.file.regularFileContents { text = String(decoding: data, as: UTF8.self) } else { throw CocoaError(.fileReadCorruptFile) } } // 当系统要将数据写入磁盘时，将调用此方法 func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper { let data = Data(text.utf8) return FileWrapper(regularFileWithContents: data) } func write(to fileWrapper: inout FileWrapper, contentType: UTType) throws { let data = Data(text.utf8) fileWrapper = FileWrapper(regularFileWithContents: data) } } ================================================ FILE: example/data/demo9/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/data/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 UISupportsDocumentBrowser LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/data/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-write com.apple.security.files.bookmarks.app-scope ================================================ FILE: example/data/demo9/README.md ================================================ 如何使用 `FileDocument` 和 `DocumentGroup` 创建基于文档的应用程序？ === SwiftUI 附带了对基于文档的应用程序的支持，这些应用程序使用户可以创建，编辑和共享文本文件之类的文档。在 `SwiftUI` 中，我们可以使用两种主要类型：`FileDocument` 协议（用于定义应用程序中的文档的外观）以及 `DocumentGroup` 结构，该结构为我们提供了一个默认场景，允许用户创建，打开和保存文档。 创建自己的基于文档的应用程序需要四个步骤： 1. 定义您的文档，包括应如何保存和加载文档。 2. 创建某种允许用户编辑其文档的视图。 3. 创建一个能够创建文件并将其加载到用户界面中的 `DocumentGroup`。 4. 更新您的 `Info.plist` 文件以表明您要使用系统的文档浏览器。 我们将从定义您的文档开始，对所有这些进行研究。某些文档类型会保存多个不同类型的文件，但是现在我们要说的是，我们仅支持纯文本，我们希望将这些文本直接读取并写入磁盘。 首先，在 `Swift` 文件的顶部添加 `import UniformTypeIdentifiers`，以便引入统一的类型标识符，这是一种固定的方式来说明文档可以使用的数据类型。 现在添加此结构，定义一个简单的文本文件： ```swift struct TextFile: FileDocument { // 告诉系统我们仅支持纯文本 static var readableContentTypes = [UTType.plainText] // 默认情况下，您的文档为空 var text = "" // 创建新的空文档的简单初始化程序 init(initialText: String = "") { text = initialText } // 此初始化程序加载以前保存的数据 init(configuration: ReadConfiguration) throws { if let data = configuration.file.regularFileContents { text = String(decoding: data, as: UTF8.self) } else { throw CocoaError(.fileReadCorruptFile) } } // 当系统要将数据写入磁盘时，将调用此方法 func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper { let data = Data(text.utf8) return FileWrapper(regularFileWithContents: data) } } ``` 请注意，如何在 `fileWrapper(configuration:)` 方法中将文本字符串转换为 `Data` 实例，然后使用 `FileWrapper` 保存它。 说文件应该存储在哪里不是我们的工作 – iOS会为我们负责。 我们的第二个任务是创建某种类型的编辑器区域，用户可以在其中编辑我们的文本。 这应该使用 `@Binding` 属性包装器，以便它更新 `TextFile` 结构中的文本，而不是保留其自己的本地副本： ```swift struct ContentView: View { @Binding var document: TextFile var body: some View { TextEditor(text: $document.text) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView(document: .constant(TextFile())) } } ``` 我们的第三步是编辑项目的主要 `Swift` 文件，使其包含 `DocumentGroup`，该 `DocumentGroup` 提供了用于浏览，打开和创建文件的系统标准界面： ```swift @main struct YourAwesomeApp: App { var body: some Scene { DocumentGroup(newDocument: TextFile()) { file in ContentView(document: file.$document) } } } ``` 如您所见，它告诉 `iOS` 如何创建新文件以及如何显示它们。 最后，我们需要向 `Info.plist` 添加一个新键，因此现在打开它，右键单击某个空间，然后选择“添加行”。 对于密钥名称，输入 `Supports Document Browser`，确保“类型”设置为布尔值，然后将值设置为 `YES`。 您的基于文档的应用已准备就绪。 如果您现在重新运行应用程序，您将看到标准的 iOS 文档选择器界面，如果按 `+`，iOS 将创建一个新文件并在 `ContentView` 中打开该文件进行编辑。 如果是在 macOS 上进行保存会报错，如下报错信息 ``` [OpenSavePanels] ERROR: Unable to display save panel: your app has the User Selected File Read entitlement but it needs User Selected File Read/Write to display save panels. Please ensure that your app's target capabilities include the proper entitlements. ``` 这个时候需要编辑 `Demo/macOS/macOS.entitlements` 添加如下配置，到你的 `macOS.entitlements` 的配置中。 ```xml com.apple.security.files.user-selected.read-write com.apple.security.files.bookmarks.app-scope ``` ================================================ FILE: example/drawing/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo1/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo1/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { ZStack { Rectangle() .fill(Color.black) .frame(width: 200, height: 200) RoundedRectangle(cornerRadius: 25, style: .continuous) 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XCConfigurationList section */ }; rootObject = 7D498E9F2600A55C00504434 /* Project object */; } ================================================ FILE: example/drawing/demo1/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/drawing/demo1/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/drawing/demo1/README.md ================================================ SwiftUI 的内置形状 === SwiftUI 为我们提供了五个常用的内置形状：矩形(rectangle)，圆角矩形(rounded rectangle)，圆形(circle)，椭圆形(ellipse)和胶囊形(capsule)。 根据提供的尺寸，最后三个尤其在行为上有细微的差别，但是我们可以通过一个示例来演示所有选项： ```swift struct ContentView: View { var body: some View { ZStack { Rectangle() .fill(Color.black) .frame(width: 200, height: 200) RoundedRectangle(cornerRadius: 25, style: .continuous) .fill(Color.red) .frame(width: 200, height: 200) Capsule() .fill(Color.green) .frame(width: 100, height: 50) Ellipse() .fill(Color.blue) .frame(width: 100, height: 50) Circle() .fill(Color.white) .frame(width: 100, height: 50) } } } ``` 绘制所有五个形状：两个以 `200x200` 绘制，三个以 `100x50` 绘制。 但是，由于形状的绘制行为不同，因此您会在输出中看到所有五个形状： - `Rectangle` 将按照您指定的确切尺寸绘制一个框。 - `RoundedRectangle` 的作用相同，只是现在您可以将拐角处的角度取一定数量。 它的第二个参数 `style` 决定了您要使用经典的圆角（`.circular`）还是 Apple 稍微更平滑的替代(`.continuous`)。 - `Capsule` 绘制一个盒子，其中一个边缘轴完全变圆，具体取决于高度或宽度最大。 我们的形状是 `100x50`，因此它的左右边缘将变圆，而上边缘和下边缘则笔直。 - `Ellipse` 以您指定的确切尺寸绘制椭圆。 - `Circle` 绘制的椭圆的高度和宽度相等，因此当我们为空间提供100x50时，实际上将得到 `50x50`。 ================================================ FILE: example/drawing/demo2/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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================================================ FILE: example/drawing/demo2/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ShrinkingSquares: Shape { func path(in rect: CGRect) -> Path { var path = Path() for i in stride(from: 1, through: 100, by: 5.0) { let rect = CGRect(x: 0, y: 0, width: rect.width, height: rect.height) let insetRect = rect.insetBy(dx: CGFloat(i), dy: CGFloat(i)) path.addRect(insetRect) } return path } } struct ContentView: View { var body: some View { ShrinkingSquares() .stroke() .frame(width: 200, height: 200) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/drawing/demo2/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/drawing/demo2/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/drawing/demo2/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/drawing/demo2/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json 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FILE: example/drawing/demo2/README.md ================================================ 如何绘制自定义路径？ === `SwiftUI` 允许我们通过遵循 `Shape` 协议来绘制自定义路径，因此我们可以创建自己的形状，这些形状的作用与`Rectangle`，`Capsule` 和 `Circle` 相同。 遵守此协议并不难，因为您所要做的就是支持一个接受 `CGRect` 并返回 `Path` 的 `path(in:)` 方法。 更好的是，您可以使用以前使用 `CGPath` 或 `UIBezierPath` 构建的任何路径，然后将结果转换为 `SwiftUI` 路径。 如果您想使用 `SwiftUI` 的本机 `Path` 类型，请为其创建一个变量实例，然后根据需要添加任意数量的点或形状。 不用考虑颜色，填充或笔划宽度-您将注意力集中在原始形状上，使用自定义路径时会提供这些设置。 例如，我们可以通过绘制一系列缩小的正方形，然后将该形状放置到带有笔触和大小的SwiftUI视图中来产生创造性的效果： ```swift struct ShrinkingSquares: Shape { func path(in rect: CGRect) -> Path { var path = Path() for i in stride(from: 1, through: 100, by: 5.0) { let rect = CGRect(x: 0, y: 0, width: rect.width, height: rect.height) let insetRect = rect.insetBy(dx: CGFloat(i), dy: CGFloat(i)) path.addRect(insetRect) } return path } } struct ContentView: View { var body: some View { ShrinkingSquares() .stroke() .frame(width: 200, height: 200) } } ``` ================================================ FILE: example/drawing/demo3/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo3/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo3/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo3/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct Star: Shape { // store how many corners the star has, and how smooth/pointed it is let corners: Int let smoothness: CGFloat func path(in rect: CGRect) -> Path { // ensure we have at least two corners, otherwise send back an empty path guard corners >= 2 else { return Path() } // draw from the center of our rectangle let center = CGPoint(x: rect.width / 2, y: rect.height / 2) // start from directly upwards (as opposed to down or to the right) var currentAngle = -CGFloat.pi / 2 // calculate how much we need to move with each star corner let angleAdjustment = .pi * 2 / CGFloat(corners * 2) // figure out how much we need to move X/Y for the inner points of the star let innerX = center.x * smoothness let innerY = center.y * smoothness // we're ready to start with our path now var path = Path() // move to our initial position path.move(to: CGPoint(x: center.x * cos(currentAngle), y: center.y * sin(currentAngle))) // track the lowest point we draw to, so we can center later var bottomEdge: CGFloat = 0 // loop over all our points/inner points for corner in 0.. bottomEdge { bottomEdge = bottom } // move on to the next corner currentAngle += angleAdjustment } // figure out how much unused space we have at the bottom of our drawing rectangle let unusedSpace = (rect.height / 2 - bottomEdge) / 2 // create and apply a transform that moves our path down by that amount, centering the shape vertically let transform = CGAffineTransform(translationX: center.x, y: center.y + unusedSpace) 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7D498ED92600A7B600504434 /* Project object */; } ================================================ FILE: example/drawing/demo3/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/drawing/demo3/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/drawing/demo3/README.md ================================================ 如何绘制多边形和星星？ === 了解 SwiftUI 的基本路径绘制系统后，即可轻松添加各种形状。 例如，我们可以创建一个仅需少量数学就可以表示各种星形甚至其他多边形的星形。 代码中的代码如下： ```swift struct Star: Shape { // 储存恒星有多少个角，以及它有多光滑/尖锐 let corners: Int let smoothness: CGFloat func path(in rect: CGRect) -> Path { // 确保我们至少有两个角，否则请发送空路径 guard corners >= 2 else { return Path() } // 从矩形的中心绘制 let center = CGPoint(x: rect.width / 2, y: rect.height / 2) // 从直接向上开始（与向下或向右相反） var currentAngle = -CGFloat.pi / 2 // 计算每个星形角落需要移动多少。 let angleAdjustment = .pi * 2 / CGFloat(corners * 2) // 计算星形的内部点需要在X和Y方向上移动多少。 let innerX = center.x * smoothness let innerY = center.y * smoothness // 我们现在准备好开始绘制路径了。 var path = Path() // 移动到我们的初始位置。 path.move(to: CGPoint(x: center.x * cos(currentAngle), y: center.y * sin(currentAngle))) // 跟踪我们绘制的最低点，以便稍后进行居中处理。 var bottomEdge: CGFloat = 0 // 循环遍历所有的点/内部点。 for corner in 0.. bottomEdge { bottomEdge = bottom } // 继续下一个角落。 currentAngle += angleAdjustment } // 计算我们绘图矩形底部剩余的未使用空间。 let unusedSpace = (rect.height / 2 - bottomEdge) / 2 // 创建并应用一个变换，将我们的路径向下移动相应的距离，垂直居中形状。 let transform = CGAffineTransform(translationX: center.x, y: center.y + unusedSpace) return path.applying(transform) } } struct ContentView: View { var body: some View { Star(corners: 5, smoothness: 0.45) .fill(Color.red) .frame(width: 200, height: 200) .background(Color.green) } } ``` ================================================ FILE: example/drawing/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo4/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo4/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/drawing/demo4/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct Checkerboard: Shape { let rows: Int let columns: Int func path(in rect: CGRect) -> Path { var path = Path() // figure out how big each row/column needs to be let rowSize = rect.height / CGFloat(rows) let columnSize = rect.width / CGFloat(columns) // loop over all rows and columns, making alternating squares colored for row in 0 ..< rows { for column in 0 ..< columns { if (row + column).isMultiple(of: 2) { // this square should be colored; add a rectangle here let startX = columnSize * CGFloat(column) let startY = rowSize * CGFloat(row) let rect = CGRect(x: startX, y: startY, width: columnSize, height: rowSize) path.addRect(rect) } } } return path } } struct ContentView: View { var body: some View { Checkerboard(rows: 16, columns: 16) .fill(Color.red) .frame(width: 200, height: 200) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/drawing/demo4/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/drawing/demo4/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } 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-> Path { var path = Path() // figure out how big each row/column needs to be let rowSize = rect.height / CGFloat(rows) let columnSize = rect.width / CGFloat(columns) // loop over all rows and columns, making alternating squares colored for row in 0 ..< rows { for column in 0 ..< columns { if (row + column).isMultiple(of: 2) { // this square should be colored; add a rectangle here let startX = columnSize * CGFloat(column) let startY = rowSize * CGFloat(row) let rect = CGRect(x: startX, y: startY, width: columnSize, height: rowSize) path.addRect(rect) } } } return path } } // Create a checkerboard in a view struct ContentView: View { var body: some View { Checkerboard(rows: 16, columns: 16) .fill(Color.red) .frame(width: 200, height: 200) } } ``` ================================================ FILE: example/forms/demo1/README.md ================================================ 使用表单 === 凭借对声明式用户界面的坚定关注，`SwiftUI` 为我们提供了一种构建表单的绝妙机制-旨在收集信息的用户输入控件的集合（如订单表单或设置屏幕）也就不足为奇了。 更好的是，`SwiftUI` 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var colors = ["Red", "Green", "Blue"] var body: some View { Form { Picker("Select a color", selection: $selectedColor) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(SegmentedPickerStyle()) Toggle("Enable Logging", isOn: $enableLogging) Button("Save changes") { // activate theme! } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/forms/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/forms/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) 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CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/forms/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/forms/demo2/README.md ================================================ 基本表单设计 === SwiftUI 的表单就像 `HStack` 和 `VStack` 一样可以作为容器使用，这意味着您可以根据需要在其中添加其他视图。 但是，它们会自动适应某些控件的行为和样式，因此它们更适合表单环境。 例如，这将创建一个带有切换，分段控件和按钮的表单： ```swift struct ContentView: View { @State private var enableLogging = false @State private var selectedColor = "Red" @State private var colors = ["Red", "Green", "Blue"] var body: some View { Form { Picker("Select a color", selection: $selectedColor) { ForEach(colors, id: \.self) { Text($0) } } 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var colors = ["Red", "Green", "Blue"] var body: some View { Form { Section(footer: Text("Note: Enabling logging may slow down the app")) { Picker("Select a color", selection: $selectedColor) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(SegmentedPickerStyle()) Toggle("Enable Logging", isOn: $enableLogging) } Section { Button("Save changes") { // activate theme! } } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/forms/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/forms/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/forms/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/forms/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/forms/demo3/README.md ================================================ 将表格分为几个部分 === 分成常规部分时，SwiftUI 的表单通常最好地工作，就像常规的内容列表一样。 如何分解它们取决于您，但是通常，按照它们的用途对它们进行分组时效果最好–如果它是一个订购页面，则可以将项目放在一个组中，将自定义放在另一个组中，然后在第三组中交货。 有用的是，表单部分与列表部分相同，这意味着您可以在两个地方重复使用相同的代码。 因此，您可以在各节中添加页眉和/或页脚，也可以不使用它们，而只是在各节之间获得一些屏幕间距。 例如，这将创建一个包含两个部分的表单-第一个具有分段的控件和切换，而第二个具有保存按钮： ```swift struct ContentView: View { @State private var enableLogging = false @State private var selectedColor = "Red" @State private var colors = ["Red", "Green", "Blue"] var body: some View { Form { Section(footer: Text("Note: Enabling logging may slow down the app")) { Picker("Select a color", selection: $selectedColor) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(SegmentedPickerStyle()) Toggle("Enable Logging", isOn: $enableLogging) } Section { Button("Save changes") { // activate theme! } } } } } ``` ================================================ FILE: example/forms/demo4/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D793D64260531D200A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793D51260531D100A87448 /* DemoApp.swift */; }; 7D793D65260531D200A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793D51260531D100A87448 /* DemoApp.swift */; }; 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import SwiftUI struct ContentView: View { @State private var selectedStrength = "Mild" let strengths = ["Mild", "Medium", "Mature"] var body: some View { NavigationView { Form { Section { #if !os(macOS) Picker("Strength", selection: $selectedStrength) { ForEach(strengths, id: \.self) { Text($0) } } .pickerStyle(WheelPickerStyle()) #else Picker("Strength", selection: $selectedStrength) { ForEach(strengths, id: \.self) { Text($0) } } #endif } } .navigationTitle("Select your cheese") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/forms/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/forms/demo4/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/forms/demo4/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/forms/demo4/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/forms/demo4/README.md ================================================ 表单选择器 `Pickers` === SwiftUI 的选择器视图在表单中时会表现出特殊的行为，并会根据您使用它们的平台自动进行调整。 在 `iOS` 上，这种行为尤其令人印象深刻，因为选择器可以折叠为一个列表行，该行可以导航到可能选项的新列表–这是使用许多选项的一种非常自然的方式。 例如，这将创建一个带有选择器的表单，该选择器使用一个数组作为其项目： ```swift struct ContentView: View { @State private var selectedStrength = "Mild" let strengths = ["Mild", "Medium", "Mature"] var body: some View { Form { Section { Picker("Strength", selection: $selectedStrength) { ForEach(strengths, id: \.self) { Text($0) } } } } } } ``` 在 `iOS` 上，该列表将显示为一个列表行，您可以点击以进入一个新屏幕，显示所有可能的选项 - `Mild`，`Medium` 和 `Mature`。 您当前的选择旁边将有一个选中标记，当您选择一个新选项时，它将返回到上一个屏幕，现在显示该屏幕。 提示：由于表单中的选择器具有这种导航行为，因此重要的是，将它们显示在iOS的 `NavigationView` 中，否则您将发现点击它们不起作用。 这可能是您直接在表单周围创建的，也可以是从本身包装在 `NavigationView` 中的另一个视图中呈现表单的。 如果要禁用此行为，可以通过使用 `.pickerStyle(WheelPickerStyle())` 修饰符强制选择器采用其常规样式，如下所示： ```swift struct ContentView: View { @State private var selectedStrength = "Mild" let strengths = ["Mild", "Medium", "Mature"] var body: some View { NavigationView { Form { Section { #if !os(macOS) Picker("Strength", selection: $selectedStrength) { ForEach(strengths, id: \.self) { Text($0) } } .pickerStyle(WheelPickerStyle()) #else Picker("Strength", selection: $selectedStrength) { ForEach(strengths, id: \.self) { Text($0) } } 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com.apple.security.files.user-selected.read-only ================================================ FILE: example/forms/demo5/README.md ================================================ 启用和禁用表单中的元素 === SwiftUI 允许我们通过使用 `disabled()` 修饰符来禁用其表单的任何部分甚至整个表单。 这采用一个布尔值，该布尔值定义是否应禁用该元素。 表单元素的样式会自动更新以反映其状态-例如，按钮和切换按钮显示为灰色。 例如，这将创建一个包含两个部分的表单：一个包含一个切换开关，一个包含一个仅在打开切换开关时才启用的按钮： ```swift struct ContentView: View { @State private var agreedToTerms = false var body: some View { Form { Section { Toggle("Agree to terms and conditions", isOn: $agreedToTerms) } Section { Button("Continue") { print("Thank you!") } .disabled(agreedToTerms == false) } } } } ``` 如您所见，仅通过在修饰符列表中添加 `disabled(agreedToTerms == false)` 即可禁用该按钮。 像许多其他SwiftUI修饰符一样，您可以解除 `disable()`，以便根据所需的行为在该节甚至整个表单上运行它-例如，将其移至该节之后即可。 ================================================ FILE: example/forms/demo6/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; 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"info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/forms/demo6/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" }, { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/forms/demo6/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/forms/demo6/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/20. // import SwiftUI struct ContentView: View { @State private var showingAdvancedOptions = false @State private var enableLogging = false var body: some View { Form { Section { Toggle("Show advanced options", isOn: $showingAdvancedOptions.animation()) if showingAdvancedOptions { Toggle("Enable logging", isOn: $enableLogging) } } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/forms/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/forms/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/forms/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/forms/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/forms/demo6/README.md ================================================ 显示和隐藏表单行 === SwiftUI 允许我们根据需要在表单中添加和删除项目，这在您希望根据以前的选择调整可见的选项列表时特别有用。 例如，这显示了一个切换，提示用户是否要显示更多高级选项。 启用该切换后，会出现第二个切换，使他们能够启用日志记录： ```swift struct ContentView: View { @State private var showingAdvancedOptions = false @State private var enableLogging = false var body: some View { Form { Section { Toggle("Show advanced options", isOn: $showingAdvancedOptions.animation()) if showingAdvancedOptions { Toggle("Enable logging", isOn: $enableLogging) } } } } } ``` 请注意，我是如何将 `animation()` 附加到 `$showingAdvancedOptions` 绑定上的，以便为由于绑定更改而导致的视图更改启用隐式动画。 ================================================ FILE: example/images-shapes-media/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo1/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo1/Demo/Demo/Assets.xcassets/dog.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "dog.jpeg", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo1/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { var body: some View { VStack { Image("dog") .resizable() .frame(width:100, height:100) Image(systemName: "cloud.heavyrain.fill") .font(.largeTitle) } .frame(width: 440, height: 300, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: 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这些可以从您的包(bundle)，系统图标，`UIImage` 等加载图像，但是这三个是最常见的。 要从 `bundle` 中加载图片并将其显示在图片视图中，只需使用以下方法： ```swift Image("dog") ``` 需要在 `Assets.xcassets` 里面添加 `dog` 的图片。 ![](imgs/1.png) 如果要使用 `Apple` 的 `SF Symbols` 图标集，则应使用 `Image(systemName:)` 初始化程序，如下所示： ```swift Image(systemName: "cloud.heavyrain.fill") .font(.largeTitle) ``` 请注意，如何使用 `font()` 修饰符来调整 `SF Symbols`，就好像它们是文本一样。 ![](imgs/2.png) ================================================ FILE: example/images-shapes-media/demo10/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo10/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { 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ContentView: View { var body: some View { ZStack { ContainerRelativeShape() .inset(by: 8) .fill(Color.blue) Text("Hello, World!") .font(.title) } .frame(width: 300, height: 200) .background(Color.red) .clipShape(Capsule()) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo10/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/images-shapes-media/demo10/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: 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defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D4992B72601D5AB00504434 /* Project object */; } ================================================ FILE: example/images-shapes-media/demo10/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/images-shapes-media/demo10/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo10/README.md ================================================ 什么时候应该使用 `ContainerRelativeShape`？ === SwiftUI 具有许多不言自明的内置形状，但其中一个引人注目：`ContainerRelativeShape`。 这不是固定的形状，而是旨在成为放置在其中的任何形状的固定版本，这在创建主屏幕小部件时尤其重要。 重要提示：目前，`ContainerRelativeShape` 仅在窗口小部件内起作用。 您可以在其他地方使用它，但它只会形成一个矩形。 例如，我们可以编写代码在窗口小部件中绘制蓝色形状，然后使用 `ContainerRelativeShape` 来确保其形状与窗口小部件本身相同： ```swift struct ContentView: View { var body: some View { ZStack { ContainerRelativeShape() .inset(by: 4) .fill(Color.blue) Text("Hello, World!") .font(.title) } .frame(width: 300, height: 200) .background(Color.red) .clipShape(Capsule()) } } ``` ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI import AVKit struct ContentView: View { var body: some View { VideoPlayer(player: AVPlayer(url: Bundle.main.url(forResource: "trailer", withExtension: "mp4")!)) .frame(height: 400) VideoPlayer(player: AVPlayer(url: URL(string: "https://media.w3.org/2010/05/sintel/trailer.mp4")!)) { VStack { Text("Watermark") .foregroundColor(.black) .background(Color.white.opacity(0.7)) Spacer() } .frame(width: 400, height: 300) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only com.apple.security.network.client ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct 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section */ 7D4992D72601D76000504434 /* Build configuration list for PBXProject "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D4992EA2601D76100504434 /* Debug */, 7D4992EB2601D76100504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; 7D4992EC2601D76100504434 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D4992ED2601D76100504434 /* Debug */, 7D4992EE2601D76100504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D4992D42601D76000504434 /* Project object */; } ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/images-shapes-media/demo11/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo11/README.md ================================================ 如何使用 `VideoPlayer` 播放电影？ === SwiftUI 的 `VideoPlayer` 视图使我们可以从本地或远程的任何URL播放电影。 它来自 `AVKit` 框架，因此在尝试之前，请确保并添加导入 `AVKit`。 例如，如果您的应用程序包中包含 `video.mp4` 并想播放，请使用以下命令： ```swift VideoPlayer(player: AVPlayer(url: Bundle.main.url(forResource: "video", withExtension: "mp4")!)) .frame(height: 400) ``` 提醒：您需要将导入 `AVKit` 添加到 `Swift` 文件中才能使用它。 如果要播放远程视频，请改用其远程URL： ```swift VideoPlayer(player: AVPlayer(url: URL(string: "https://media.w3.org/2010/05/sintel/trailer.mp4")!)) .frame(height: 400) ``` 如果需要，可以向 `VideoPlayer` 初始化程序提供第二个参数，该参数添加要在视频上绘制的内容。 此内容将绘制在系统视频控件下方，但可以响应那些控件未捕获的任何事件。 例如，这会将文本“水印(Watermark)”放置在视频区域的顶部： ```swift VideoPlayer(player: AVPlayer(url: URL(string: "https://media.w3.org/2010/05/sintel/trailer.mp4")!)) { VStack { Text("Watermark") .foregroundColor(.black) .background(Color.white.opacity(0.7)) Spacer() } .frame(width: 400, height: 300) } ``` ⚠️ 注意：应用地址要使用 `https` 如果使用 `http` 需要启用它，同时设置 传出连接（客户端）`outgoing connections(client)` ![](imgs/1.png) ⚠️ 注意：本地添加资源的方式 ![](imgs/2.png) ![](imgs/3.png) ================================================ FILE: example/images-shapes-media/demo12/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo12/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : 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falling boxes class GameScene: SKScene { override func didMove(to view: SKView) { physicsBody = SKPhysicsBody(edgeLoopFrom: frame) } // override func touchesBegan(_ touches: Set, with event: UIEvent?) { // guard let touch = touches.first else { return } // let location = touch.location(in: self) // let box = SKSpriteNode(color: SKColor.red, size: CGSize(width: 50, height: 50)) // box.position = location // box.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 50, height: 50)) // addChild(box) // } } // A sample SwiftUI creating a GameScene and sizing it // at 300x400 points struct ContentView: View { var scene: SKScene { let scene = GameScene() scene.size = CGSize(width: 300, height: 400) scene.scaleMode = .fill return scene } var body: some View { SpriteView(scene: scene) .frame(width: 300, height: 400) .ignoresSafeArea() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: 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================================================ FILE: example/images-shapes-media/demo12/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo12/README.md ================================================ 如何使用 `SpriteView` 集成 `SpriteKit`？ === SwiftUI 的 `SpriteView` 使我们可以在 SwiftUI 内部渲染任何 `SKScene` 子类，如果您需要的话，它甚至可以调整场景的大小。 要尝试，请首先将导入 `SpriteKit` 添加到您的 Swift 文件中。 其次，创建您要渲染的某种游戏场景。 例如，这将在您轻按的任何位置创建下降框，添加物理效果，使它们整齐地交互： ```swift // 一个带有掉落盒子的简单游戏场景 class GameScene: SKScene { override func didMove(to view: SKView) { physicsBody = SKPhysicsBody(edgeLoopFrom: frame) } // 只能在 iOS 中运行 override func touchesBegan(_ touches: Set, with event: UIEvent?) { guard let touch = touches.first else { return } let location = touch.location(in: self) let box = SKSpriteNode(color: SKColor.red, size: CGSize(width: 50, height: 50)) box.position = location box.physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: 50, height: 50)) addChild(box) } } // 一个示例 SwiftUI 创建一个 GameScene 并调整其大小 // 在 300x400 点 struct ContentView: View { var scene: SKScene { let scene = GameScene() scene.size = CGSize(width: 300, height: 400) scene.scaleMode = .fill return scene } var body: some View { SpriteView(scene: scene) .frame(width: 300, height: 400) .ignoresSafeArea() } } ``` 您创建的游戏场景是完全交互式的，因此它的工作方式就像普通的 `SKView` 在 `UIKit` 中所做的一样。 ================================================ FILE: example/images-shapes-media/demo13/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 55; objects = { /* Begin PBXBuildFile section */ 7DECCE13271FC08200152B15 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DECCE03271FC08000152B15 /* DemoApp.swift */; }; 7DECCE14271FC08200152B15 /* DemoApp.swift in Sources */ = {isa = 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================================================ FILE: example/images-shapes-media/demo13/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", 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example/images-shapes-media/demo13/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo13/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI @ViewBuilder func waitView() -> some View { VStack { if #available(iOS 15.0, *) { ProgressView() .progressViewStyle(CircularProgressViewStyle(tint: .indigo)) } else { // Fallback on earlier versions } Text("Fetching image...") } } struct AvatarsView: View { var body: some View { if #available(iOS 15.0, *) { AsyncImage( url: URL(string: "https://avatars.githubusercontent.com/u/1680273?v=4"), transaction: Transaction(animation: .easeInOut(duration: 2.5)) ) { phase in switch phase { case .success(let image): image .resizable() .aspectRatio(contentMode: .fit) .clipShape(RoundedRectangle(cornerRadius: 15)) .padding() case .failure(let error): Text(error.localizedDescription) case .empty: waitView() @unknown default: EmptyView() } } .frame(width: 128, height: 128) } else { // Fallback on earlier versions } } } struct ContentView: View { var body: some View { if #available(iOS 15.0, *) { AvatarsView() AsyncImage(url: URL(string: "https://jaywcjlove.github.io/swiftui-example/example/images-shapes-media/demo13/imgs/avatars@2x.png"), scale: 2) { image in image.resizable() .aspectRatio(contentMode: .fit) .clipShape(RoundedRectangle(cornerRadius: 15)) .padding() } placeholder: { Color.red } .frame(width: 128, height: 128) .clipShape(RoundedRectangle(cornerRadius: 25)) // AsyncImage(url: URL(string: "https://avatars.githubusercontent.com/u/1680273?v=4")) { image in // image.resizable() // } placeholder: { // Color.red // } // .frame(width: 128, height: 128) // .clipShape(RoundedRectangle(cornerRadius: 25)) } else { // Fallback on earlier versions } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo13/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/images-shapes-media/demo13/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/images-shapes-media/demo13/README.md ================================================ 如何从 URL 加载远程图像？ === SwiftUI 有一个专用的 [`AsyncImage`](https://developer.apple.com/documentation/swiftui/asyncimage) 用于从互联网下载和显示远程图像。 以最简单的形式，您可以只传递一个 URL，如下所示： ```swift if #available(iOS 15.0, *) { AsyncImage(url: URL(string: "https://avatars.githubusercontent.com/u/1680273?v=4")) } else { // Fallback on earlier versions } ``` > 🚧 兼容性 > - iOS 15.0+ > - iPadOS 15.0+ > - macOS 12.0+ Beta > - Mac Catalyst 15.0+ Beta > - tvOS 15.0+ > - watchOS 8.0+ ![](./imgs/001.png) 请注意 URL 是如何可选的——如果 URL 字符串无效，`AsyncImage` 将只显示一个默认的灰色占位符。 如果由于某种原因无法加载图像 —— 如果用户离线，或者图像不存在——那么系统将继续显示相同的占位符图像。 ![](./imgs/002.png) 因为 `SwiftUI` 不知道下载的图像有多大，默认情况下 `AsyncImage` 在加载时具有灵活的宽度和高度。 因此，除非您另外指定，否则在加载图像时它会在您的 UI 中占用大量空间，然后在加载图像后立即跳转到正确的大小。 尽管您可以将框架附加到您的图像，但默认情况下它只会影响占位符 - 如果您完成的图像以不同的尺寸到达，您的 UI 将不得不进行调整以适应它。 更好的解决方案是添加函数来控制结果图像的显示方式以及您想要的占位符类型。 例如，这会获取我们的图像并使其可调整大小，但在加载时使用红色占位符颜色： ```swift AsyncImage(url: URL(string: "https://jaywcjlove.github.io/swiftui-example/example/images-shapes-media/demo13/imgs/avatars.png")) { image in image.resizable() .aspectRatio(contentMode: .fit) .clipShape(RoundedRectangle(cornerRadius: 15)) .padding() } placeholder: { Color.red } .frame(width: 128, height: 128) .clipShape(RoundedRectangle(cornerRadius: 25)) ``` ![](./imgs/003.png) 因为生成的图像和占位符颜色现在都可以调整大小，所以 `frame()` 修饰符能够确保我们的 `AsyncImage` 始终保持正确的大小。 在你问之前：不，`AsyncImage` 上没有直接可用的 `resizable()` 修饰符。 注意：默认情况下，假设图像的比例为 `1`，这意味着专为非视网膜屏幕设计。 但是，如果您已经知道正确的比例，您也可以使用第二个参数控制比例： ```swift AsyncImage(url: URL(string: "https://jaywcjlove.github.io/swiftui-example/example/images-shapes-media/demo13/imgs/avatars@2x.png"), scale: 2) ``` ## 图像加载过度效果 AsyncImage 有另一个初始化器，它允许分阶段获取图像加载结果： ```swift public init(url: URL?, scale: CGFloat = 1, transaction: Transaction = Transaction(), @ViewBuilder content: @escaping (AsyncImagePhase) -> Content) ``` 请参阅以下示例： ```swift import SwiftUI @ViewBuilder func waitView() -> some View { VStack { if #available(iOS 15.0, *) { ProgressView() .progressViewStyle(CircularProgressViewStyle(tint: .indigo)) } else { // Fallback on earlier versions } Text("Fetching image...") } } struct AvatarsView: View { var body: some View { if #available(iOS 15.0, *) { AsyncImage( url: URL(string: "https://avatars.githubusercontent.com/u/1680273?v=4"), transaction: Transaction(animation: .easeInOut(duration: 2.5)) ) { phase in switch phase { case .success(let image): image .resizable() .aspectRatio(contentMode: .fit) .clipShape(RoundedRectangle(cornerRadius: 15)) .padding() case .failure(let error): Text(error.localizedDescription) case .empty: waitView() @unknown default: EmptyView() } } .frame(width: 128, height: 128) } else { // Fallback on earlier versions } } } ``` 这里我只提供 `URL` 和 `content` 参数，这是一个闭包。 闭包的参数是一个 `AsyncImagePhase` 值，其中 `AsyncImagePhase` 是一个枚举，包含代表某些加载阶段的案例。 实际上，您可以在上方的 `switch` 语句中看到 `AsyncImagePhase` 的所有可用情况。 第一种是已经成功获取图像的情况。 `case` 的关联值是一个 `SwiftUI Image` 视图，我们可以使用任何必要的视图修饰符来装饰它。 第二种情况包含可能发生的潜在错误。 在这个例子中，我只是在文本视图中呈现错误描述。 最后一个名为 `.empty` 的情况表示当还没有加载图像时 `AsyncImage` 视图的状态。 在这里，我们可以添加占位符视图、进度视图或适合应用程序的任何其他内容。 在上面的示例中，我调用了 `waitView()` 方法，如下所示： ```swift @ViewBuilder func waitView() -> some View { VStack { if #available(iOS 15.0, *) { ProgressView() .progressViewStyle(CircularProgressViewStyle(tint: .indigo)) } else { // Fallback on earlier versions } Text("Fetching image...") } } ``` 其目的是与文本一起呈现进度视图。 看到 `switch` 语句中还有一个 `@unknown default case;` 这是处理将来可能添加到 `AsyncImagePhase` 枚举的任何新值所必需的。 `EmptyView` 是处理这种情况的最佳候选者。 上面的 `AsyncImage` 实现结果如下： ![](./imgs/004.gif) 通常，请注意上述初始化 `AsyncImage` 视图的方法可以更好地控制视图的结果。 特别是，我们实际上可以检测到此错误何时发生，从而显示不同的视图； 使用上一部分中遇到的占位符初始值设定项我们无法做到的事情。 但这并不是这个初始化程序的唯一好处。 通过 transaction 参数，我们可以传递一个动画，该动画将在阶段变化时启动。 接下来你可以看到和之前一样的例子，这次只为事务参数提供了一个动画实例： ================================================ FILE: example/images-shapes-media/demo14/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo14/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo14/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo14/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { var body: some View { ScrollView { if #available(iOS 15.0, *) { Image(systemName: "theatermasks") .symbolRenderingMode(.hierarchical) .font(.system(size: 144)) Image(systemName: "theatermasks") .symbolRenderingMode(.hierarchical) .foregroundColor(.blue) .font(.system(size: 144)) Image(systemName: "shareplay") .symbolRenderingMode(.palette) .foregroundStyle(.blue, .black) .font(.system(size: 144)) Image(systemName: "person.3.sequence.fill") .symbolRenderingMode(.palette) .foregroundStyle(.blue, .green, .red) .font(.system(size: 144)) Image(systemName: "person.3.sequence.fill") .symbolRenderingMode(.palette) .foregroundStyle( .linearGradient(colors: [.red, .black], startPoint: .top, endPoint: .bottomTrailing), .linearGradient(colors: [.green, .black], startPoint: .top, endPoint: .bottomTrailing), .linearGradient(colors: [.blue, .black], startPoint: .top, endPoint: .bottomTrailing) ) .font(.system(size: 144)) } else { // Fallback on earlier versions } } .padding(.top, 100) .padding(.bottom, 100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo14/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // 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================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo14/README.md ================================================ 如何使用 SF Symbols 获得自定义颜色和透明度？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) 如果您在 `SwiftUI` 的图像视图中使用 `SF Symbols`，您可以使用 `foregroundColor()` 属性获得简单的颜色，或者使用 `.renderingMode(.original)` 启用它们的多色变体。 但是，为了使图像的各个部分具有更大的灵活性，您可以使用分层变体或提供完全自定义的调色板。 分层渲染使用不透明度在屏幕上创建阴影变化。 例如，这将以透明方式绘制图像以提供额外的深度和清晰度： ```swift Image(systemName: "theatermasks") .symbolRenderingMode(.hierarchical) .font(.system(size: 144)) ``` ![](./imgs/001.png) 分层渲染与前景色结合使用，因此如果需要，您可以同时指定两者： ```swift Image(systemName: "theatermasks") .symbolRenderingMode(.hierarchical) .foregroundColor(.blue) .font(.system(size: 144)) ``` ![](./imgs/002.png) 为了获得更多功能，您可以使用 `.palette` 变体来完全控制图像中的颜色。 因此，我们可以同时将 `SharePlay` 图标渲染为蓝色和黑色，如下所示： ```swift Image(systemName: "shareplay") .symbolRenderingMode(.palette) .foregroundStyle(.blue, .black) .font(.system(size: 144)) ``` ![](./imgs/003.png) 这些颜色的应用方式取决于每个单独的符号 —— 有时符号定义为两层，有时定义为三层，您需要单独探索它们以了解它们是如何分解的。 对于包含三个变体的符号，只需添加额外的颜色： ```swift Image(systemName: "person.3.sequence.fill") .symbolRenderingMode(.palette) .foregroundStyle(.blue, .green, .red) .font(.system(size: 144)) ``` ![](./imgs/004.png) 这甚至适用于复杂的前景样式，例如为图标中的每个人提供一个渐变： ```swift Image(systemName: "person.3.sequence.fill") .symbolRenderingMode(.palette) .foregroundStyle( .linearGradient(colors: [.red, .black], startPoint: .top, endPoint: .bottomTrailing), .linearGradient(colors: [.green, .black], startPoint: .top, endPoint: .bottomTrailing), .linearGradient(colors: [.blue, .black], startPoint: .top, endPoint: .bottomTrailing) ) .font(.system(size: 144)) ``` ![](./imgs/005.png) ================================================ FILE: example/images-shapes-media/demo2/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo2/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo2/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo2/Demo/Demo/Assets.xcassets/rome.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "download.jpg", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo2/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. 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example/images-shapes-media/demo3/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { Image("logo") .resizable(resizingMode: .tile) Image("logo") .resizable(capInsets: EdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20), resizingMode: .tile) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo3/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/images-shapes-media/demo3/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI 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PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D499202260119D800504434 /* Debug */, 7D499203260119D800504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D4991E9260119D700504434 /* Project object */; } ================================================ FILE: example/images-shapes-media/demo3/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/images-shapes-media/demo3/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo3/README.md ================================================ 如何平铺图像？ === 如果要求 `SwiftUI` 使图片视图占用比图片设计的空间更多的空间，则默认行为是拉伸图片以使其适合您所需的空间。 但是，并不需要那样做：它还可以平铺图像，即水平和垂直重复图像，从而完全填充空间。 关键是将 `resizable()` 修饰符与其 `resizingMode` 参数一起使用。 该名称可以是 `.stretch`（默认设置）或 `.tile`，其中 `.tile` 是您要查找的内容。 在代码中，它看起来像这样： ```swift Image("logo") .resizable(resizingMode: .tile) ``` 如果您只希望平铺图像的一部分（将一个或多个边缘固定在图像视图的边缘），则可以为第一个参数提供边缘插图，如下所示： ```swift Image("logo") .resizable(capInsets: EdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20), resizingMode: .tile) ``` ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { Image(systemName: "cloud.heavyrain.fill") Image(systemName: "cloud.heavyrain.fill") .font(.largeTitle) Image(systemName: "cloud.heavyrain.fill") .font(.largeTitle) .foregroundColor(.red) Image(systemName: "cloud.sun.rain.fill") .renderingMode(.original) .font(.largeTitle) .padding() .background(Color.black) .clipShape(Circle()) Image(systemName: "person.crop.circle.fill.badge.plus") .renderingMode(.original) .foregroundColor(.blue) .font(.largeTitle) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { 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/* Debug */, 7D49921D26011B2C00504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; 7D49921E26011B2C00504434 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D49921F26011B2C00504434 /* Debug */, 7D49922026011B2C00504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D49920626011B2B00504434 /* Project object */; } ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/images-shapes-media/demo4/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo4/README.md ================================================ 如何使用SF符号渲染图像？ === `SwiftUI` 的 `Image` 视图使我们可以从 [`SF Symbols`](https://developer.apple.com/sf-symbols/) 中加载任何 [`2400+`](https://developer.apple.com/design/human-interface-guidelines/sf-symbols/overview/) 图标，其中许多图标也可以使用多色。 要从 Apple 的 [`SF Symbols`](https://developer.apple.com/design/human-interface-guidelines/sf-symbols/overview/) 集中加载图标，请使用 `Image(systemName:)`初始化程序，并传入要加载的图标字符串，如下所示： ```swift Image(systemName: "cloud.heavyrain.fill") ``` 您获得的图像是可缩放的且可着色的，这意味着您可以要求 `SwiftUI` 放大图像以匹配其随附的任何“动态类型”文本样式（如果有）： ```swift Image(systemName: "cloud.heavyrain.fill") .font(.largeTitle) ``` 而且这还意味着您可以使用与您已经看到的相同的 `frontantColor()` 修饰符为图像着色： ```swift Image(systemName: "cloud.heavyrain.fill") .font(.largeTitle) .foregroundColor(.red) ``` 如果您使用的图像包含色彩元素，则可以使用 `.renderingMode().original)` 激活多色模式，如下所示： ```swift Image(systemName: "cloud.sun.rain.fill") .renderingMode(.original) .font(.largeTitle) .padding() .background(Color.black) .clipShape(Circle()) ``` 您可以选择将 `foregroundColor()` 修改器应用于多色 SF符号，这将使部分符号重新着色。 例如，这将使图标的一部分变为蓝色，而部分变为绿色： ```swift Image(systemName: "person.crop.circle.fill.badge.plus") .renderingMode(.original) .foregroundColor(.blue) .font(.largeTitle) ``` 通过 Apple 提供的应用 [SF Symbols 2](https://developer.apple.com/sf-symbols/) 查看 [`SF Symbols`](https://developer.apple.com/sf-symbols/) 所有的图标名称。 ![](imgs/1.jpg) ================================================ FILE: example/images-shapes-media/demo5/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo5/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo5/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo5/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello World") .padding() .foregroundColor(.white) .font(.largeTitle) .background( LinearGradient(gradient: Gradient(colors: [.white, .black]), startPoint: .top, endPoint: .bottom) ) Text("Hello World") .padding() .foregroundColor(.white) .font(.largeTitle) .background( LinearGradient(gradient: Gradient(colors: [.white, .red, .black]), startPoint: .top, endPoint: .bottom) ) Text("Hello World") .padding() .foregroundColor(.white) .font(.largeTitle) .background( LinearGradient(gradient: Gradient(colors: [.white, .red, .black]), startPoint: .leading, endPoint: .trailing) ) Circle() .fill( RadialGradient(gradient: Gradient(colors: [.red, .yellow, .green, .blue, .purple]), center: .center, startRadius: 50, endRadius: 200) ) .frame(width: 200, height: 200) Circle() .fill( AngularGradient(gradient: Gradient(colors: [.red, .yellow, .green, .blue, .purple, .red]), center: .center) ) .frame(width: 200, height: 200) Circle() .strokeBorder( AngularGradient(gradient: Gradient(colors: [.red, .yellow, .green, .blue, .purple, .red]), center: .center, startAngle: .zero, endAngle: .degrees(360)), lineWidth: 50 ) .frame(width: 200, height: 200) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo5/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/images-shapes-media/demo5/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } 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LinearGradient(gradient: Gradient(colors: [.white, .black]), startPoint: .top, endPoint: .bottom) ) ``` 颜色被指定为一个数组，您可以根据需要设置任意多个颜色–默认情况下，`SwiftUI` 会将它们均匀地隔开。 因此，我们可以像这样从白色变成红色再变成黑色： ```swift Text("Hello World") .padding() .foregroundColor(.white) .font(.largeTitle) .background( LinearGradient(gradient: Gradient(colors: [.white, .red, .black]), startPoint: .top, endPoint: .bottom) ) ``` 要制作水平渐变而不是垂直渐变，请使用 `.lead` 和 `.trailing` 作为起点和终点： ```swift Text("Hello World") .padding() .foregroundColor(.white) .font(.largeTitle) .background( LinearGradient(gradient: Gradient(colors: [.white, .red, .black]), startPoint: .leading, endPoint: .trailing) ) ``` 对于其他渐变样式，请尝试 `RadialGradient` 或 `AngularGradient`。 例如，这将创建一个从圆心开始到边缘的各种颜色的径向渐变： ```swift Circle() .fill( RadialGradient(gradient: Gradient(colors: [.red, .yellow, .green, .blue, .purple]), center: .center, startRadius: 50, endRadius: 200) ) .frame(width: 200, height: 200) ``` 这将创建一个角度渐变（通常称为圆锥渐变），循环显示各种颜色，然后返回到起点： ```swift Circle() .fill( AngularGradient(gradient: Gradient(colors: [.red, .yellow, .green, .blue, .purple, .red]), center: .center) ) .frame(width: 200, height: 200) ``` 由于所有三种渐变类型均符合 `ShapeStyle` 协议，因此可以将它们用于背景，填充和笔触。 例如，这使用我们的彩虹圆锥形渐变作为圆的粗内部笔画： ```swift Circle() .strokeBorder( AngularGradient(gradient: Gradient(colors: [.red, .yellow, .green, .blue, .purple, .red]), center: .center, startAngle: .zero, endAngle: .degrees(360)), lineWidth: 50 ) .frame(width: 200, height: 200) ``` ================================================ FILE: example/images-shapes-media/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo6/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", 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================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "download.jpg", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { Text("Hacking with Swift") .font(.system(size: 48)) .padding(50) .background( Image("singapore") .resizable() ) Text("Hacking with Swift") .font(.largeTitle) .padding() .background( Circle() .fill(Color.red) .frame(width: 100, height: 100) ) .clipped() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: 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================================================ FILE: example/images-shapes-media/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo6/README.md ================================================ 如何使用图像和其他视图作为背景？ === SwiftUI 没有专用的修饰符来显示背景颜色或图像，而是使用其 `background()` 修饰符指定任何类型的背景视图。 例如，这将创建一个具有大字体的文本视图，然后在其后放置一个 `100x100` 的图像： ```swift Text("Hacking with Swift") .font(.system(size: 48)) .padding(50) .background( Image("singapore") .resizable() ) ``` 但是，它不必是图像。 例如，这将创建相同的文本视图，然后在其后放置一个 `50x50` 的红色圆圈： ```swift Text("Hacking with Swift") .font(.largeTitle) .padding() .background(Circle() .fill(Color.red) .frame(width: 50, height: 50)) ``` 默认情况下，背景视图会自动占用需要完全可见的空间，但是如果您愿意，可以使用 `clipped()` 修饰符将其裁剪为其父视图的大小： ```swift Text("Hacking with Swift") .font(.largeTitle) .padding() .background( Circle() .fill(Color.red) .frame(width: 100, height: 100) ) .clipped() ``` 明确地说，您可以将任何视图用作背景 – 例如，如果需要，可以使用另一个文本视图。 ================================================ FILE: example/images-shapes-media/demo7/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo7/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" 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FILE: example/images-shapes-media/demo7/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/images-shapes-media/demo7/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo7/README.md ================================================ 如何显示实体形状？ === SwiftUI 具有多种内置形状，例如矩形，圆形和胶囊形，可以根据需要创建，着色和定位每种形状。 例如，如果您想要一个 `200x200` 的红色矩形，则可以使用以下代码： ```swift Rectangle() .fill(Color.red) .frame(width: 200, height: 200) ``` 同样，如果您想要一个 `100x100` 的蓝色圆圈，则可以使用以下方法： ```swift Circle() .fill(Color.blue) .frame(width: 100, height: 100) ``` 圆角矩形有专用的形状，可让您自定义应应用的圆角程度，并完全控制圆角的类型。 例如，这将创建一个圆角矩形，每个角上有 `25` 个舍入点： ```swift RoundedRectangle(cornerRadius: 25) .fill(Color.green) .frame(width: 150, height: 100) ``` 最后，SwiftUI 提供 `Capsule()` 形状作为圆角矩形的一种特殊形式，其中矩形的最短边始终是完全圆角的。 这是带有按钮的流行样式，因为只需几行代码就可以得到胶囊形的按钮： ```swift Capsule() .fill(Color.green) .frame(width: 150, height: 100) ``` ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI extension Shape { func fill(_ fillStyle: Fill, strokeBorder strokeStyle: Stroke, lineWidth: CGFloat = 1) -> some View { self .stroke(strokeStyle, lineWidth: lineWidth) .background(self.fill(fillStyle)) } } extension InsettableShape { func fill(_ fillStyle: Fill, strokeBorder strokeStyle: Stroke, lineWidth: CGFloat = 1) -> some View { self .strokeBorder(strokeStyle, lineWidth: lineWidth) .background(self.fill(fillStyle)) } } struct ContentView: View { var body: some View { Circle() .strokeBorder(Color.black, lineWidth: 20) .background(Circle().fill(Color.blue)) .frame(width: 150, height: 150) ZStack { Circle() .fill(Color.red) Circle() .strokeBorder(Color.black, lineWidth: 20) } .frame(width: 150, height: 150) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/images-shapes-media/demo8/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } 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================================================ 如何同时填充和描边形状？ === SwiftUI 提供了 `fill()`，`stroke()` 和 `strokeBorder()` 修饰符，用于调整绘制图形的方式，但它并未提供内置的填充和描边方式。 但是，我们可以通过两种不同的方式获得相同的效果，在这里我将向大家展示。 第一种选择是使用 `strokeBorder()` 在形状周围添加边框，然后使用 `background()` 在背景中放置填充的形状。 例如，这将创建一个带有黑色笔划和蓝色填充的圆： ```swift Circle() .strokeBorder(Color.black, lineWidth: 20) .background(Circle().fill(Color.blue)) .frame(width: 150, height: 150) ``` 使用 `background()` 可确保蓝色圆圈始终与红色圆圈的大小匹配。 第二个选择是使用ZStack手动将两个圆圈分层： ```swift ZStack { Circle() .fill(Color.red) Circle() .strokeBorder(Color.black, lineWidth: 20) } .frame(width: 150, height: 150) ``` 如果要填充和描边很多形状，则应考虑将此功能包装在扩展中。 只有 `InsettableShapes` 才能获取 `strokeBorder()` 方法，因此您可能应该编写两种扩展方法 - 一种使用 `stroke()` 处理常规形状，另一种使用 `strokeBorder()` 处理可嵌入形状。 这就是代码中的样子： ```swift extension Shape { func fill(_ fillStyle: Fill, strokeBorder strokeStyle: Stroke, lineWidth: CGFloat = 1) -> some View { self .stroke(strokeStyle, lineWidth: lineWidth) .background(self.fill(fillStyle)) } } extension InsettableShape { func fill(_ fillStyle: Fill, strokeBorder strokeStyle: Stroke, lineWidth: CGFloat = 1) -> some View { self .strokeBorder(strokeStyle, lineWidth: lineWidth) .background(self.fill(fillStyle)) } } ``` ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { @State private var completionAmount: CGFloat = 0.0 let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect() var body: some View { Circle() .trim(from: 0, to: 0.5) .frame(width: 200, height: 200) Rectangle() .trim(from: 0, to: completionAmount) .stroke(Color.red, lineWidth: 20) .frame(width: 200, height: 200) .rotationEffect(.degrees(-90)) .onReceive(timer) { _ in withAnimation { if completionAmount == 1 { completionAmount = 0 } else { completionAmount += 0.2 } } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() 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7D4992B42601D19B00504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D49929A2601D19A00504434 /* Project object */; } ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/images-shapes-media/demo9/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/images-shapes-media/demo9/README.md ================================================ 如何使用 `trim()` 绘制实体形状的一部分？ === SwiftUI 允许我们使用其 `trim()` 修饰符仅绘制笔触的一部分或填充形状，该修饰符采用两个参数：起始值和终止值，都存储为 0 到 1 之间的 `CGFloat`。 例如，如果您想要一个半圆，则可以这样写： ```swift Circle() .trim(from: 0, to: 0.5) .frame(width: 200, height: 200) ``` SwiftUI 绘制其形状，以使 `0` 度直接位于右侧，因此，如果要更改为使其直接向上0度，则应应用 `rotationEffect()` 修饰符。 例如，它使用计时器来调整传递给 `trim()` 的值，以使矩形的笔触随着时间的推移而增长，例如进度指示器： ```swift struct ContentView: View { @State private var completionAmount: CGFloat = 0.0 let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect() var body: some View { Rectangle() .trim(from: 0, to: completionAmount) .stroke(Color.red, lineWidth: 20) .frame(width: 200, height: 200) .rotationEffect(.degrees(-90)) .onReceive(timer) { _ in withAnimation { if completionAmount == 1 { completionAmount = 0 } else { completionAmount += 0.2 } } } } } ``` 您也可以使用带有填充形状的 `trim()` ，尽管动画时结果有些奇怪。 ================================================ FILE: example/introduction/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/introduction/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/introduction/demo1/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : 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![](imgs/2.png) 您还应该为界面选择 `SwiftUI` ，为生命周期选择 `SwiftUI` 应用。 ![](imgs/3.png) 现在你可以点击 ▶︎ 运行起来，也可以通过快捷键 ⌘ + r ![](imgs/4.png) - ⌘ + b 编译工程 - ⌘ + ⇧ + k 清除编译文件夹 - ⌘ + . 停止运行 ================================================ FILE: example/introduction/demo2/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/introduction/demo2/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { 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= Release; }; 7DECCDC4271FB9F400152B15 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7DECCDC5271FB9F400152B15 /* Debug */, 7DECCDC6271FB9F400152B15 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7DECCDAD271FB9F200152B15 /* Project object */; } ================================================ FILE: example/introduction/demo2/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/introduction/demo2/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/introduction/demo2/README.md ================================================ 使用列表构建菜单 === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 我们将从简单开始，然后逐步发展。 在此过程中，将开始看到 `SwiftUI` 使某些事情变得容易的事情，以及有些困难的事情。 在 `ContentView.swift` 中是一个基本结构，代表我们应用程序中唯一的屏幕：`ContentView`。 看起来像这样： ```swift struct ContentView: View { var body: some View { Text("Hello World") .padding() } } ``` 不是很多代码，但是已经告诉了我们很多： 1. 视图是 `SwiftUI` 中的结构。这不是必需的，但强烈建议您这样做。 2. 所有视图都必须符合 `View` 协议。 3. 该协议需要一个称为 `body` 的计算属性，该属性包含视图的实际布局。 4. 它返回一些 `View`，这是一种Swift功能，称为不透明的返回类型-表示 “一种特定的视图，但我们并不在乎哪个视图。” 5. 在我们的内容视图内部是一个基本的UI块，称为 `Text`。它用于在 `SwiftUI` 中表示文本字符串，可以直接作为标签表示，也可以间接表示为导航栏，按钮等内部的文本。 6. 文本上有一个 `padding()` 方法调用，它告诉SwiftUI我们在该视图周围需要一些额外的空间。 在SwiftUI中，我们称这些修饰符是因为它们修改了文本视图的外观或行为方式。 您还应该在 `Xcode` 的右侧看到预览窗格。输入代码时会更新，这是一种在工作时查看所做更改的好方法。 如果您没有在右侧看到预览窗格，请到 `Editor` 菜单，然后选择 `Canvas`。 如果 `Xcode` 的预览区域停止（这会经常发生），则可以按 ⌘ + ⌥ + p 使其恢复显示布局。 ![](imgs/1.png) > 🚧 这真的很重要，因此我要重复一遍：按下 ⌘ + ⌥ + p 将更新您的 `SwiftUI` 预览。 `Xcode` 为我们创建的基本内容视图是一个单独的文本视图，上面写着 `Hello World`，并带有一些填充-多余的边距阻止了我们添加的任何其他视图之间的距离过近。 在我们的应用程序中，这实际上将向我们显示菜单中的项目列表，因此我们将改用列表视图。 将 [下面代码在工程中](https://github.com/jaywcjlove/swiftui-example/blob/ce7d93191e80cf8214ce04d917827fc36bb1091b/example/demo2/Demo/Demo/ContentView.swift#L12-L16) 替换当前的文本视图： ```swift List { Text("Hello World") Text("Hello World") Text("Hello World") } ``` 使用 `NavigationView` 呈现视图堆栈的视图，这些视图表示导航层次结构中的可见路径。 ```swift NavigationView { List { Text("Hello World") Text("Hello World") Text("Hello World") } } ``` 通过 `.listStyle(SidebarListStyle())` 设置导航菜单列表透明磨砂玻璃效果。 ```swift NavigationView { List { Text("Hello World") Text("Hello World") Text("Hello World") } .listStyle(SidebarListStyle()) } ``` ![](imgs/2.png) ================================================ FILE: example/lists/demo1/README.md ================================================ 使用 List === SwiftUI 的 `List` 视图类似于 `UITableView`，它可以根据您的需要显示静态或动态表视图单元格。 但是，它的使用非常简单：我们不需要在情节提要中创建原型单元，也无需在代码中注册它们； 我们不需要告诉它有多少行； 我们不需要手动出队和配置单元，等等。 相反，SwiftUI 的列表旨在实现可组合性-旨在能够从较小的事物构建更大的事物。 因此，SwiftUI 没有让一个大型视图控制器手动配置单元格，而是让我们构建了一个小型视图，这些小型视图知道如何将自己配置为列表行，然后使用它们。 就代码大小而言，区别就在于惊人–您可以删除几乎所有的表格视图代码，并且仍然拥有与以往相同的外观。 ================================================ FILE: example/lists/demo10/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D793C6E2604ADD500A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793C5B2604ADD400A87448 /* DemoApp.swift */; }; 7D793C6F2604ADD500A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793C5B2604ADD400A87448 /* DemoApp.swift */; }; 7D793C702604ADD500A87448 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793C5C2604ADD400A87448 /* ContentView.swift */; }; 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"2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/lists/demo10/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/lists/demo10/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct Bookmark: Identifiable { let id = UUID() let name: String let icon: String var items: [Bookmark]? // 一些示例网站 static let apple = Bookmark(name: "Apple", icon: "1.circle") static let bbc = Bookmark(name: "BBC", icon: "square.and.pencil") static let swift = Bookmark(name: "Swift", icon: "bolt.fill") static let twitter = Bookmark(name: "Twitter", icon: "mic") // 一些示例组 static let example1 = Bookmark(name: "Favorites", icon: "star", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter]) static let example2 = Bookmark(name: "Recent", icon: "timer", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter]) static let example3 = Bookmark(name: "Recommended", icon: "hand.thumbsup", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter]) } struct ContentView: View { let items: [Bookmark] = [.example1, .example2, .example3] var body: some View { List(items, children: \.items) { row in Image(systemName: row.icon) Text(row.name) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo10/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo10/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo10/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo10/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo10/README.md ================================================ 如何创建扩展列表？ === SwiftUI 的 `List` 视图具有增强的初始化程序，可让我们使用子元素创建展开的部分-它们将通过可点击的箭头进行渲染，并在点按时可打开以显示子元素。 要使用这种形式的 `List`，您需要具有精确形式的数据：您的数据模型应具有一个可选的具有相同类型的子级数组，因此您可以创建树。 通常，您很可能会从 `JSON` 或类似格式加载此类内容，但为了使操作简单起见，我将粘贴一些硬编码的数据，以便您查看其外观。 放置好数据后，您可以通过传递数据数组以及子代位置的键路径（在我们的情况下为 `\.items`）将其加载到列表中。 然后，您将获得常规关闭方式，可以像通常一样提供行数据。 这是代码： ```swift struct Bookmark: Identifiable { let id = UUID() let name: String let icon: String var items: [Bookmark]? // 一些示例网站 static let apple = Bookmark(name: "Apple", icon: "1.circle") static let bbc = Bookmark(name: "BBC", icon: "square.and.pencil") static let swift = Bookmark(name: "Swift", icon: "bolt.fill") static let twitter = Bookmark(name: "Twitter", icon: "mic") // 一些示例组 static let example1 = Bookmark(name: "Favorites", icon: "star", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter]) static let example2 = Bookmark(name: "Recent", icon: "timer", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter]) static let example3 = Bookmark(name: "Recommended", icon: "hand.thumbsup", items: [Bookmark.apple, Bookmark.bbc, Bookmark.swift, Bookmark.twitter]) } struct ContentView: View { let items: [Bookmark] = [.example1, .example2, .example3] var body: some View { List(items, children: \.items) { row in Image(systemName: row.icon) Text(row.name) } } } ``` 提示：这只是占位符数据，因此我多次重复了相同的书签，但希望您能理解。 该代码运行时，您会看到我们的网上论坛的三行，以及可折叠起来以显示其子项的披露指标。 ================================================ FILE: example/lists/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D793C972604AEFA00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793C842604AEFA00A87448 /* DemoApp.swift */; }; 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example/lists/demo11/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" 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"version" : 1 } } ================================================ FILE: example/lists/demo11/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { var body: some View { ScrollViewReader { proxy in VStack { Button("Jump to #50") { proxy.scrollTo(50, anchor: .top) } List(0..<100) { i in Text("Example \(i)") .id(i) } } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo11/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo11/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo11/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo11/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo11/README.md ================================================ 如何滚动到列表中的特定行？ === 如果您想以编程方式使 `SwiftUI` 的列表移动以显示特定行，则应将其嵌入 `ScrollViewReader` 中。 这在其代理上提供了 `scrollTo()` 方法，只需提供其 ID 和锚点（可选）即可移动到列表内的任何行。 例如，这将在列表中创建100行，并且当您按下按钮时，它将直接滚动到 ID 为 50 的行： ```swift struct ContentView: View { var body: some View { ScrollViewReader { 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var body: some View { NavigationView { List(names, id: \.self, selection: $selection) { name in Text(name) } .navigationTitle("List Selection") .toolbar { EditButton() } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo12/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo12/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo12/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo12/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo12/README.md ================================================ 如何允许列表中的行选择？ === SwiftUI 的列表支持单项和多项选择，但仅当您的列表处于编辑模式时才可以。 要支持单选，请首先在列表中添加与您使用的类型相同的可选属性。 例如，如果使用整数列表，则将具有可选的 `Int`。 完成后，使用其选择参数将其传递到列表，然后确保列表处于编辑模式。 例如，此代码显示列表中的字符串数组，并将所选项目存储为可选字符串： ```swift struct ContentView: View { @State private var selection: String? let names = [ "Cyril", "Lana", "Mallory", "Sterling" ] var body: some View { NavigationView { List(names, id: \.self, selection: $selection) { name in Text(name) } .navigationTitle("List Selection") .toolbar { EditButton() } } } } ``` 请注意，工具栏中的“编辑”按钮–请记住，您的列表必须处于编辑模式才能支持选择。 如果要进行多项选择，您要做的就是将 `selection` 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example/lists/demo13/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI // 保存一些数据的示例结构 struct User: Identifiable { let id = UUID() let username = "Anonymous" } // 用于在列表中创建并显示该数据的视图 struct ContentView: View { let users = [User(), User(), User()] var body: some View { List(users) { user in Image("paul-hudson") .resizable() .frame(width: 40, height: 40) Text(user.username) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo13/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo13/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo13/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo13/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo13/README.md ================================================ 如何使用隐式堆栈？ === 如果创建动态列表并在每一行中放置多个内容，会发生什么情况？ `SwiftUI` 的解决方案简单，灵活，默认情况下会为我们提供出色的行为：它会创建一个隐式 `HStack` 来容纳您的物品，因此它们会自动水平放置。 例如，我们可以创建一行，在其中左侧有一张小图片，并将剩余空间分配给文本字段，然后创建一个由三个用户组成的数组，并在动态列表中显示它们。 这就是代码中的样子： ```swift // 保存一些数据的示例结构 struct User: Identifiable { let id = UUID() let username = "Anonymous" } // 用于在列表中创建并显示该数据的视图 struct ContentView: View { let users = [User(), User(), User()] var body: some View { List(users) { user in Image("paul-hudson") .resizable() .frame(width: 40, height: 40) Text(user.username) } } } ``` 请注意，我们不需要将图像和文本视图放到 `HStack` 中以使其并排呈现 - SwiftUI 为我们解决了这些问题。 ================================================ FILE: example/lists/demo2/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D793B262604988100A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793B132604988000A87448 /* DemoApp.swift */; }; 7D793B272604988100A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793B132604988000A87448 /* DemoApp.swift */; }; 7D793B282604988100A87448 /* ContentView.swift in Sources */ = {isa = 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var body: some View { Text("Restaurant: \(name)") } } struct ContentView: View { var body: some View { List { Pizzeria(name: "Joe's Original") Pizzeria(name: "The Real Joe's Original") Pizzeria(name: "Original Joe's") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo2/README.md ================================================ 如何创建静态物品列表 `List`？ === 要创建项目的静态列表，您首先需要定义列表中的每一行的外观。 此视图与其他视图一样，可以具有要在行中显示的数据的任何参数。 一旦有了行，就可以创建一个列表视图，该 `List` 视图可以根据需要创建任意多的行。 例如，此代码定义了一个 `Pizzeria` 视图，该视图将显示一个 `name` 字符串，然后将其用作具有三个固定数据段的 `List` 的行： ```swift struct Pizzeria: View { let name: String var body: some View { Text("Restaurant: \(name)") } } struct ContentView: View { var body: some View { List { Pizzeria(name: "Joe's Original") Pizzeria(name: "The Real Joe's Original") Pizzeria(name: "Original Joe's") } } } ``` 运行该代码后，您将在表中看到三行，就像使用 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\(restaurant.name)") } } // 创建三个 Restaurant，然后在列表中显示它们。 struct ContentView: View { let restaurants = [ Restaurant(name: "Joe's Original"), Restaurant(name: "The Real Joe's Original"), Restaurant(name: "Original Joe's") ] var body: some View { List(restaurants) { restaurant in RestaurantRow(restaurant: restaurant) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo3/README.md ================================================ 如何创建动态项目列表？ === 为了处理动态项目，您必须首先告诉SwiftUI它如何识别哪个项目是哪个项目。 可以通过手动指定标识属性或使用可标识协议来完成。 该协议只有一个要求，即该类型必须具有某种类型的id值，SwiftUI可以用来查看哪个项目是哪个。 为了说明这一点，我们可以创建三件事，然后将它们放在一起： 1. 一个 `Restaurant` 结构，它说 `Restaurant` 有一个 ID 和名称，该 ID 是一个随机标识符，以便 SwiftUI 知道是哪个。 2. 一个小视图，用于确定列表中的每一行的外观。 在我们的案例中，我们将定义一个 `RestaurantRow` 视图，该视图存储一个餐厅并在文本视图中打印其名称。 3. 显示多个餐厅的列表视图。 这意味着创建一些示例数据，将其放入数组中，然后将其传递到要呈现的列表中。 这就是代码中的全部内容： ```swift // 用于精确存储一个 Restaurant 数据的结构。 struct Restaurant: Identifiable { let id = UUID() let name: String } // 显示一个 Restaurant 数据的视图。 struct RestaurantRow: View { var restaurant: Restaurant var body: some View { Text("Come and eat at \(restaurant.name)") } } // 创建三个 Restaurant，然后在列表中显示它们。 struct ContentView: View { let restaurants = [ Restaurant(name: "Joe's Original"), Restaurant(name: "The Real Joe's Original"), Restaurant(name: "Original Joe's") ] var body: some View { List(restaurants) { restaurant in RestaurantRow(restaurant: restaurant) } } } ``` 其中大部分只是创建数据–最后一部分是真正的动作：使用 `List(restaurants)` 从 `Restaurantss` 数组创建一个列表，对数组中的每个项目执行以下关闭操作一次。 每次关闭 `restaurant` 时，`restaurant`输入都会用数组中的一项填充，因此我们使用它来创建 `RestaurantRow`。 实际上，在像这样的琐碎情况下，我们可以使代码更短：`List(restaurants, rowContent: RestaurantRow.init)` 的作用完全相同。 ================================================ FILE: example/lists/demo4/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { 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example/lists/demo4/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/lists/demo4/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var users = ["Paul", "Taylor", "Adele"] var body: some View { NavigationView { List { ForEach(users, id: \.self) { user in Text(user) } .onDelete(perform: delete) } } } func delete(at offsets: IndexSet) { users.remove(atOffsets: offsets) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo4/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo4/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo4/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo4/README.md ================================================ 如何让用户从列表中删除行？ === 通过将 onDelete(perform:) 处理程序附加到您的部分或全部数据，SwiftUI 使用户轻松滑动即可删除行。 该处理程序需要具有一个特定的签名，该签名接受要删除的多个索引，如下所示： ```swift func delete(at offsets: IndexSet) { // delete the objects here } ``` 在其中，您通常需要调用 `Swift` 的 `remove(atOffsets:)` 方法来从序列中删除请求的行。 由于 `SwiftUI` 正在监视您的状态，因此您所做的任何更改都会自动反映在您的UI中。 例如，此代码创建一个包含三个项目的列表的 `ContentView` 结构，然后附加一个 `onDelete(perform:)` 修饰符，该修饰符从列表中删除任何项目： ```swift struct ContentView: View { @State private var users = ["Paul", "Taylor", "Adele"] var body: some View { NavigationView { List { ForEach(users, id: \.self) { user in Text(user) } .onDelete(perform: delete) } } } func delete(at offsets: IndexSet) { users.remove(atOffsets: offsets) } } ``` 如果您运行该代码，就会发现可以滑动删除列表中的任何行。 提示：如果您想知道，`onDelete()` 可以作为 `ForEach` 的修饰符，但不能直接作为 `List` 的修饰符。 这是因为列表可以包含静态行，但是这些静态行当然不能删除。 ================================================ FILE: example/lists/demo5/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects 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example/lists/demo5/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/lists/demo5/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var users = ["Paul", "Taylor", "Adele"] var body: some View { NavigationView { List { ForEach(users, id: \.self) { user in Text(user) } .onMove(perform: move) } .toolbar { #if !os(macOS) EditButton() #else Button("Show details") { print("Image tapped!") } #endif } } } func move(from source: IndexSet, to destination: Int) { users.move(fromOffsets: source, toOffset: destination) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo5/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo5/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo5/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo5/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo5/README.md ================================================ 如何让用户在列表中移动行？ === SwiftUI 通过将 `onMove(perform:)` 修饰符附加到列表中的项目上，使我们可以轻松地进入列表中，以便在行中四处移动行，并在发生移动操作时调用我们选择的方法。 该方法需要接受源 `IndexSet` 和目标 `Int`，如下所示： ```swift func move(from source: IndexSet, to destination: Int) { // move the data here } ``` 移动多个项目时，最好先移动后面的项目，这样可以避免移动其他项目并使索引混乱。 幸运的是，Swift的序列具有内置的方式为我们移动索引集，因此我们只需传递参数即可使其正常工作。 例如，我们可以创建一个 `ContentView` 结构，该结构设置三个用户名字符串的数组，并要求 SwiftUI 调用 `move()` 方法来移动它们。 为了激活移动-即使拖动手柄出现-它还向导航视图添加了一个编辑按钮，以便用户可以切换编辑模式。 这是代码： ```swift struct ContentView: View { @State private var users = ["Paul", "Taylor", "Adele"] var body: some View { NavigationView { List { ForEach(users, id: \.self) { user in Text(user) } .onMove(perform: move) } .toolbar { #if !os(macOS) EditButton() #else Button("Show details") { print("Image tapped!") } #endif } } } func move(from source: IndexSet, to destination: Int) { users.move(fromOffsets: source, 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IDEDidComputeMac32BitWarning ================================================ FILE: example/lists/demo6/Demo/Shared/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/lists/demo6/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" 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tasks")) { TaskRow() TaskRow() TaskRow() } Section(header: Text("Other tasks")) { TaskRow() TaskRow() TaskRow() } Section(header: Text("Other tasks")) { TaskRow() TaskRow() TaskRow() } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo6/README.md ================================================ 如何将 `Section` 添加到列表？ === SwiftUI 的列表视图内置了对节和节标题的支持，就像 `UIKit` 中的 `UITableView` 一样。 要在某些单元格周围添加一个节，请先在其周围放置一个 `Section`，然后还可以选择添加页眉和页脚。 例如，我们可以创建一行来保存提醒应用程序的任务数据，然后创建一个包含两个部分的列表视图：一个用于重要任务，另一个用于次要任务。 外观如下： ```swift struct TaskRow: View { var body: some View { Text("Task data goes here") } } struct ContentView: View { var body: some View { List { Section(header: Text("Important tasks")) { TaskRow() TaskRow() TaskRow() } Section(header: Text("Other tasks")) { TaskRow() TaskRow() TaskRow() } } } } ``` 您还可以将页脚文本添加到各部分，如下所示： ```swift List { Section(header: 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EditButton() #endif } } } func delete(at offsets: IndexSet) { users.remove(atOffsets: offsets) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo7/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo7/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo7/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo7/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo7/README.md ================================================ 如何使用 `EditButton` 启用对列表的编辑？ === 如果已将 SwiftUI 列表视图配置为支持删除或编辑其项目，则可以通过在某处添加 `EditButton` 来允许用户切换列表视图的编辑模式。 例如，此 `ContentView` 结构定义一个用户数组，附加一个 `onDelete()` 方法，然后在导航栏中添加一个编辑按钮： ```swift struct ContentView: View { @State private var users = ["Paul", "Taylor", "Adele"] var body: some View { NavigationView { List { ForEach(users, id: \.self) { user in Text(user) } .onDelete(perform: delete) } .toolbar { #if !os(macOS) EditButton() #endif } } } func delete(at offsets: IndexSet) { users.remove(atOffsets: offsets) } } ``` 运行该命令后，您会发现可以点击 `编辑` 按钮来启用或禁用列表中项目的编辑模式。 ================================================ FILE: 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"2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/lists/demo8/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/lists/demo8/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { var body: some View { List { ForEach(0..<10) { Text("Row \($0)") } .listRowBackground(Color.red) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/lists/demo8/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/lists/demo8/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo8/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo8/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo8/README.md ================================================ 如何使用 `listRowBackground()` 设置列表行的背景色？ === SwiftUI 有一个专用的修饰符，用于设置列表行后面的背景视图，称为 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UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/lists/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/lists/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/lists/demo9/README.md ================================================ 如何创建分组和插入分组列表？ === SwiftUI 的 List 视图有一个 `listStyle()` 修饰符来控制列表的外观，并且您可能需要两个选项：`GroupedListStyle()` 获取旧的项目分组，`InsetGroupedListStyle()` 获得新的 `iOS 13-style` 的项目分组。 例如，这定义了一个示例行并将其放置在分组列表内： ```swift struct ExampleRow: View { var body: some View { Text("Example Row") } } struct ContentView: View { var body: some View { List { Section(header: Text("Examples")) { ExampleRow() ExampleRow() ExampleRow() } } .listStyle(GroupedListStyle()) } } ``` 或者，这将创建具有新插入样式分组的 `100` 行的列表： ```swift List(0..<100) { i in Text("Row \(i)") } .listStyle(InsetGroupedListStyle()) ``` ================================================ FILE: 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================================================ FILE: example/presenting-views/demo1/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/presenting-views/demo1/README.md ================================================ 如何将新视图推送到 NavigationView 上？ === 如果您拥有导航视图，并且想将新视图推入 `SwiftUI` 的导航堆栈，则应使用 `NavigationLink`。 这将目的地作为其第一个参数，并将在按钮内显示的内容作为其第二个参数（或作为结尾的闭包），并负责将新视图和动画一起推入堆栈。 例如，这将创建一个简单的 `SecondView` 结构，然后从 `NavigationView` 呈现它： ```swift struct SecondView: View { var body: some View { Text("This is the detail view") } } struct ContentView: View { var body: some View { NavigationView { VStack { NavigationLink(destination: SecondView()) { Text("Show Detail View") } .navigationTitle("Navigation") } } } } ``` ================================================ FILE: 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example/presenting-views/demo2/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/presenting-views/demo2/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/presenting-views/demo2/README.md ================================================ 点击列表行时如何推送新视图？ === 轻按一行后，可以在列表行内使用 `SwiftUI` 的 `NavigationLink` 来显示新视图。如果 `NavigationLink` 环绕您的整个行，则系统会自动理解为可以轻敲整个行以呈现新视图。 为了说明这一点，以下代码创建了一个 `PlayerView`，该 `Viewer` 能够以粗体显示一位所选足球运动员的姓名。 然后，它为几个播放器创建一个列表，其中列表中的每一行都有一个 `NavigationLink`，该链接传递被点击的播放器的名称： ```swift struct PlayerView: View { let name: String var body: some View { Text("Selected player: \(name)") .font(.largeTitle) } } struct ContentView: View { let players = [ "Roy Kent", "Richard Montlaur", "Dani Rojas", "Jamie Tartt", ] var body: some View { NavigationView { List(players, id: \.self) { player in NavigationLink(destination: PlayerView(name: player)) { Text(player) } } .navigationTitle("Select a player") } } } ``` 请注意，我们实际上是如何在导航链接中放置一个列表行的 – `SwiftUI` 由于其出色的编写能力而使其能够正常工作。 ================================================ FILE: example/presenting-views/demo3/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo3/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { 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NavigationLink(destination: Text("View A"), tag: "A", selection: $selection) { EmptyView() } NavigationLink(destination: Text("View B"), tag: "B", selection: $selection) { EmptyView() } Button("Tap to show A") { selection = "A" } Button("Tap to show B") { selection = "B" } } .navigationTitle("Navigation") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/presenting-views/demo3/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/presenting-views/demo3/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } 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`NavigationLink` 绑定到布尔状态-当该布尔值变为 `true` 时，导航将立即发生，而当布尔值变为 `false` 时，新视图将被关闭。 SwiftUI 确实要求我们即使在进行程序化导航时也需要将某种视图传递给 `NavigationLink`。 您可能想使用 `EmptyView` 完全不显示任何内容，例如，下面是一个完整的程序化导航示例，其中我在按下按钮时切换了布尔值： ```swift struct ContentView: View { @State private var isShowingDetailView = false var body: some View { NavigationView { VStack { NavigationLink(destination: Text("Second View"), isActive: $isShowingDetailView) { EmptyView() } Button("Tap to show detail") { isShowingDetailView = true } } .navigationTitle("Navigation") } } } ``` 与简单的 `NavigationLink` 相比，此方法的优势在于，我们的按钮可以在触发程序化导航之前完成任何其他工作 - 也许您想保存一些数据或对用户进行身份验证等。 如果您有多个可能的目的地，则可以将多个 `NavigationLink` 绑定到某个选择状态，并为每个状态赋予唯一的标签。 当您更新选择状态以匹配这些标签之一时，将导致相应的 `NavigationLink` 激活，这使您可以进行多目标程序化导航，而无需使用大量的布尔值。 例如，根据 `selection` 属性的值，它导航到两个目标文本视图之一： ```swift struct ContentView: View { @State private var selection: String? = nil var body: some View { NavigationView { VStack { NavigationLink(destination: Text("View A"), tag: "A", selection: $selection) { EmptyView() } NavigationLink(destination: Text("View B"), tag: "B", selection: $selection) { EmptyView() } Button("Tap to show A") { selection = "A" } Button("Tap to show B") { selection = "B" } } .navigationTitle("Navigation") } } } ``` ================================================ FILE: example/presenting-views/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo4/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : 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defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D128C0726004843000D5DF7 /* Project object */; } ================================================ FILE: example/presenting-views/demo4/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/presenting-views/demo4/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/presenting-views/demo4/README.md ================================================ 如何使用 `sheets` 呈现新视图？ === SwiftUI 的工作表用于在现有视图上显示新视图，同时仍允许用户向下拖动以在准备好新视图时将其关闭。 要使用工作表，请给它显示一些内容（一些文本，图像，自定义视图等），添加一个布尔值以定义是否应显示详细信息视图，然后将其作为模式表附加到您的主视图。 例如，这将创建一个简单的详细信息视图，然后在轻按按钮时从 `ContentView` 呈现它： ```swift struct SheetView: View { @Environment(\.presentationMode) var presentationMode var body: some View { Button("Press to dismiss") { presentationMode.wrappedValue.dismiss() } .font(.title) .padding() .background(Color.black) } } struct ContentView: View { @State private var showingSheet = false var body: some View { Button("Show Sheet") { showingSheet.toggle() } .sheet(isPresented: $showingSheet) { SheetView() } } } ``` 与导航链接不同，工作表不需要导航视图即可工作。 提示：如果您不希望通过在 `iOS` 上向下拖动来关闭工作表，请改用 `fullScreenCover()` 修饰符。 `SwiftUI` 的 `fullScreenCover()` 修饰符为我们提供了一种呈现样式，用于您想要覆盖尽可能多的屏幕的时间，并且在代码中，它的工作方式与常规工作表几乎相同。 可以通过向下拖动常规工作表来关闭常规工作表，但是使用 `fullScreenCover()` 呈现的视图则无法实现。 因此，很重要的一点是，您可能需要使用 `presentationMode` 环境密钥来提供一种方法来关闭呈现的视图。 例如，这定义了一个简单的 `FullScreenModalView` 结构，该结构可以关闭自身，然后在按下另一个按钮时从 `ContentView` 中呈现它： ```swift struct FullScreenModalView: View { @Environment(\.presentationMode) var presentationMode var body: some View { Button("Dismiss Modal") { presentationMode.wrappedValue.dismiss() } } } struct ContentView: View { @State private var isPresented = false var body: some View { Button("Present!") { isPresented.toggle() } .fullScreenCover(isPresented: $isPresented, content: FullScreenModalView.init) } } ``` ⚠️ 重要：macOS 上没有 `fullScreenCover()`。 ================================================ FILE: example/presenting-views/demo5/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo5/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo5/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo5/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct DismissingView1: View { @Environment(\.presentationMode) var presentationMode var body: some View { Button("Dismiss Me 1") { presentationMode.wrappedValue.dismiss() } } } struct DismissingView2: View { @Binding var isPresented: Bool var body: some View { Button("Dismiss Me 2") { isPresented = false } } } struct ContentView: View { @State private var showingDetail = false @State private var showingDetail2 = false var body: some View { Button("Show Detail 1") { showingDetail = true } .sheet(isPresented: $showingDetail) { DismissingView1() } .padding(100) Button("Show Detail 2") { showingDetail2 = true } .sheet(isPresented: $showingDetail2) { DismissingView2(isPresented: $showingDetail2) } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/presenting-views/demo5/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/presenting-views/demo5/Demo/Demo/DemoApp.swift 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defaultConfigurationName = Release; }; 7D128C3C26005BA5000D5DF7 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D128C3D26005BA5000D5DF7 /* Debug */, 7D128C3E26005BA5000D5DF7 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D128C2426005BA4000D5DF7 /* Project object */; } ================================================ FILE: example/presenting-views/demo5/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/presenting-views/demo5/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/presenting-views/demo5/README.md ================================================ 如何使视图自行关闭？ === 当您使用工作表显示 `SwiftUI` 视图时，通常会在发生某些情况（例如，用户点击按钮）时关闭该视图。 在 `SwiftUI` 中，有两种解决方法，下面将向您展示两种方法，以便您确定最适合自己的需求。 第一种选择是告诉视图使用其表示模式环境键关闭视图。 任何视图都可以使用 `@Environment(\.presentationMode)` 读取其演示模式，并在该视图上调用 `wrappedValue.dismiss()`将导致该视图被关闭。 例如，我们可以创建一个详细信息视图，该视图能够使用其演示模式环境密钥自行关闭，然后从 `ContentView` 呈现该视图。 ```swift struct DismissingView1: View { @Environment(\.presentationMode) var presentationMode var body: some View { Button("Dismiss Me") { presentationMode.wrappedValue.dismiss() } } } struct ContentView: View { @State private var showingDetail = false var body: some View { Button("Show Detail") { showingDetail = true } .sheet(isPresented: $showingDetail) { DismissingView1() } } } ``` 另一个选择是将绑定传递到显示的视图中，以便可以将绑定的值改回 `false`。 您仍然需要在呈现视图中具有某种状态属性，但是现在您将其作为绑定传递到详细信息视图中。 使用这种方法，详细信息视图将其绑定设置为 `false` 也会更新原始视图中的状态，从而导致详细信息视图不起作用-详细信息视图和原始视图都指向相同的布尔值，因此更改其中一个会更改另一个布尔值 地方也。 代码中的代码如下： ```swift struct DismissingView2: View { @Binding var isPresented: Bool var body: some View { Button("Dismiss Me") { isPresented = false } } } struct ContentView: View { @State private var showingDetail = false var body: some View { Button("Show Detail") { showingDetail = true } .sheet(isPresented: $showingDetail) { DismissingView2(isPresented: $showingDetail) } } } ``` ================================================ FILE: example/presenting-views/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo6/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo6/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/presenting-views/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var showingPopover = false var body: some View { VStack { Button("Show Menu") { showingPopover = true } .popover(isPresented: $showingPopover) { Text("Your content here") .font(.headline) .padding() } } .frame(width: 300, height: 300) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/presenting-views/demo6/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/presenting-views/demo6/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/presenting-views/demo6/Demo/Demo/Info.plist 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XCConfigurationList section */ }; rootObject = 7D128C4126005D0C000D5DF7 /* Project object */; } ================================================ FILE: example/presenting-views/demo6/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/presenting-views/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/presenting-views/demo6/README.md ================================================ 如何显示弹出视图？ === `SwiftUI` 有一个专用的修改器来显示弹出窗口，在 `iPadOS` 上它显示为浮动气球，而在 `iOS` 上则像一张纸一样滑到屏幕上。 要显示弹出窗口，您需要某种状态来确定当前是否可见该弹出窗口，但仅此而已 - 与警报和操作表不同，弹出窗口可以包含您想要的任何视图。 因此，只要将您需要的任何东西放在弹出窗口中，`SwiftUI` 就会处理其余的工作。 例如，当点击一个按钮时，将显示一个弹出视图： ```swift struct ContentView: View { @State private var showingPopover = false var body: some View { Button("Show Menu") { showingPopover = true } .popover(isPresented: $showingPopover) { Text("Your content here") .font(.headline) .padding() } } } ``` ================================================ FILE: example/quick-start/answering-the-big-question-should-you-learn-swiftui-uikit-or-both.md ================================================ 回答这个大问题: 你应该学习 SwiftUI，UIKit，还是两者都学？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 在我被问到的所有有关 SwiftUI 的问题中，有一个问题出现的次数比其他问题都多。"我正在学习Swift：我应该学习 SwiftUI，还是我也需要学习 UIKit？" 人们似乎想听到的答案是："忘掉 UIKit 这个老东西--你应该专注于 SwiftUI！" 然而，简单的事实是，绝大多数人都不会因为这个建议而获得成功，值得详细解释一下原因。 在讨论细节之前，我想明确一件事：SwiftUI 是一个了不起的用户界面框架，而且 100% 绝对会成为苹果平台上应用开发的未来。然而，如果你想在今天--或者说在未来一到两年左右的任何时候--建立伟大的应用，你也 100% 绝对需要一些 UIKit 的知识，特别是如果你打算把应用开发作为你的职业。 好了，言尽于此。专注于 SwiftUI 而忽视 UIKit 所产生的问题归结为以下三点： 1. 受限的 API 覆盖。 2. 有限的普及率。 3. 有限的（社区）支持。 让我们来分析一下... ### 受限的 API 覆盖 无论你是想为公司工作，还是只是在业余时间建立业余应用程序，SwiftUI 的一个缺点是，它目前没有像 UIKit 那样广泛的 API 覆盖率。 例如，如果你想显示丰富的可编辑文本，你会使用 UIKit 中的 UITextView，但 SwiftUI 自己的 TextEditor 只会处理普通字符串。或者，如果你想在一个 Alert 中显示一个文本字段，在 UIKit 中就有，但在 SwiftUI 中却不可能。 这并不是苹果偷懒，相反，这似乎是故意的：他们不是先发布所有 API 的封装器，然后再进行修改，而是采取更谨慎的方法，逐步增加 API。这应该（我希望！）减少我们在未来看到的破坏性变化的数量，因为它给了苹果的工程师更多的时间来优化他们打算发布的 API 子集。 很多时候你会找到变通的办法，但说实话，当你知道某件事在 UIKit 中是微不足道就能实现的，但在 SwiftUI 中却很难，甚至是不可能的时候，你会感到很累。有时甚至是很简单的事情：如何改变一个表格上的分隔符嵌入？或者在一个文本字段中禁用智能引号？这些在 UIKit 中只是一行代码，但在 SwiftUI 中却无法奏效。 随着时间的推移，我完全希望看到更多的功能被添加到 SwiftUI 中，使其与 UIKit 看齐，但现在许多关键组件仍然缺失。 ### 有限的普及率 SwiftUI 是在 WWDC2019 上才宣布的，在 iOS13 设备或更高版本中才可以使用。这意味着： * 迄今为止编写的几乎所有应用程序都使用 UIKit。 * 任何需要支持 iOS n-2 或更早的应用程序（例如 iOS 12），甚至在一年或更长时间内不能开始切换到 SwiftUI。 这意味着，如果你打算在未来两年内找到一份 iOS 开发者的工作，UIKit 经验实际上是强制性的，因为这是现有代码库使用的。事实上，我完全期待 UIKit 在一两年内仍然是主导的 UI 平台。没有人--我想连苹果也不例外！没有人期望 iOS 社区会在一两年内迁移。- 没有人期望 iOS 社区会以任何形式的快速迁移到 SwiftUI 上。在 UIKit 应用程序中投入了大量的代码、大量的时间和大量的资金，它还有很长的幸福生活要走。 有些人试图把采用 Swift 和采用 SwiftUI 相提并论，我认为这没有什么用。Swift 的采用速度很快，因为它适用于苹果支持的每一个框架（UIKit、SpriteKit 等），并且已经支持 iOS n-1，所以许多公司可以立即切换到它。 我想再次重申，SwiftUI 绝对会成为苹果平台开发的未来，但它需要很长的时间来获得 UIKit 水平的普及率。 同时，SwiftUI 是小型应用、个人应用、业余应用、原型应用或一般实验的完美人选。如果你有幸加入一家专门使用 SwiftUI 的公司，那就好好享受它吧! ### 有限的（社区）支持 UIKit 已经存在了十多年，这意味着：a）你可能面临的几乎每一个问题都可能已经被别人遇到并解决了；b）有很多库提供扩展和定制。 虽然有些学习者可能会想象高级开发人员的脑子里有大量的 UIKit，但一个不争的事实是，我们都在使用 Google、Stack Overflow、Hacking with Swift 等等来寻找解决问题的方法。当你走投无路的时候，可能就是把错误信息粘贴到一个网站上，但无论你是如何得到答案的，都会节省大量的时间在网上寻找答案。 SwiftUI，仅仅是由于它明显较新，可用的解决方案明显较少。事实上，寻找以前没有人试过的东西是很常见的--你简直是第一个人。这可能是一个很大的乐趣，但如果你有一个实际的项目，而你又确实想把它运出去，这也可能是一个令人沮丧的时间沉淀。 ### 那么......你是说我不应该学习 SwiftUI？ 不！SwiftUI 工作起来非常有趣，你可以用它来构建了不起的东西。这本书的其余部分都是为了帮助你尽可能快速有效地开始使用 SwiftUI--如果我不认为 SwiftUI 很棒，我就不会写这本书。 我想说的是，SwiftUI 的存在并没有在某种程度上使 UIKit 过时：如果你打算在未来两年内找到一份iOS 开发工作，知道如何使用 UIKit 将是一个坚定的要求或一个强有力的奖励。 所以，直接回答这个问题：是的，应该忙着学习 SwiftUI，因为它是苹果平台上应用开发的未来，但你仍然需要学习 UIKit，因为这些技能在未来几年都会很有用。 随着时间的推移，上面列出的三个问题都会随着 SwiftUI 的壮大、普及和社区支持而减少，而随着 SwiftUI 的发展，UIKit 将开始枯萎。然而，至少在现在，你确实需要这两样东西。 ================================================ FILE: example/quick-start/dedication.md ================================================ 贡献 === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 在苹果公司内部，设计、构建、测试、记录和交付 SwiftUI 花费了大量的精力。作为第三方开发者，我们只看到了最终的结果--当苹果公司的高级职员在 WWDC 的舞台上向大家展示它时，当我们下载新的 Xcode 看到大量的新功能时，当我们开始自己的旅程，弄清楚如何最好地利用这些不可思议的新工具时。 但是，SwiftUI 早在这之前就作为 watchOS 团队内部的一个项目开始了--从不同的人说起，大约在四年前。 四年了。 那是大约 1500 天，苹果的工程师们正在努力工作，以建立一个他们知道将彻底改变我们工作方式的东西，并将是 Swift 在 UI 开发方面的能力的最充分体现。如果你认为建立我们今天所知道的 SwiftUI 花了多少工夫，那么想象一下 Swift 本身从 1.0 到 5.1 的变化有多大！这些工程师们不被允许说话。 这些工程师不被允许向公众谈论他们的工作，甚至在苹果内部也只有一定数量的人知道 SwiftUI 的存在。为了使 SwiftUI 成为现实，来自 UIKit 团队、Swift 团队、Xcode 团队、开发者出版物团队等等的人都不得不秘密地走到一起，为我们工作，即使在今天，你也不会发现他们为自己不可思议的工作邀功。 一个简单的事实是，如果没有很多很多人的非凡努力，SwiftUI 是不可能实现的。我希望能在这里列出他们，并亲自感谢他们，但我唯一能确定的是那些在 WWDC 会议上把 "SwiftUI 工程师" 作为工作头衔的人，或者是在实验室里与我交谈的人。 因此，本书要献给 Dave Abrahams、Luca Bernardi、Kevin Cathey、Curt Clifton、Nate Cook、Michael Gorbach、John Harper、Taylor Kelly、Kyle Macomber、Natalia Panferova、Raj Ramamurthy、Matt Ricketson、Jacob Xiao，以及所有其他几位为 SwiftUI 的今天而努力的人。我们可能永远不知道还有多少来自 AppKit、UIKit、WatchKit、Xcode、Swift、开发者出版物以及其他方面的人帮助实现了 SwiftUI，但我希望他们中的每一个人都能被我们社区难以置信的积极反应所震撼。 我知道 WWDC 往往是 "照猫画虎"，在主题演讲的前一两天才会有一些功能出现，但你们成功了，我们非常非常感激。 ================================================ FILE: example/quick-start/dont-panic.md ================================================ 不要惊慌! === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 是的，我知道 SwiftUI 是一个庞大的新事物，一开始你可能看起来完全陌生，但在本指南中，你会得到大量的实践帮助，指导你了解 SwiftUI 的工作原理，这样你就可以快速使用它了。 如果你已经熟悉了 Swift，那么你所知道的关于 UIKit 的一切仍然是有用的，而且会在好几年内有用。 你所知道的关于 Swift 的一切都没有改变，所以那都是有用的。 你所知道的关于 iOS 应用程序的外观和感觉的一切都没有改变。 SwiftUI 所改变的是我们如何制作我们的应用程序。是的，苹果引入了很多新的东西需要学习，但一旦你过了基础阶段，你就会开始认识到与 UIKit 的许多共同点。 所以，再次强调：不要惊慌。如果你已经熟练掌握了 UIKit，你可以在一天之内掌握 SwiftUI 的基本知识。如果你在没有任何 UIKit 知识的情况下接触 SwiftUI，那也没关系，因为你会发现 SwiftUI 给你带来了无与伦比的应用构建体验。 所以，相信我：你已经掌握了这个。 **在我们开始之前**：请确保你在安装 Xcode 13 的同时安装了 macOS 11。这种组合为您提供了最新的SwiftUI 版本，从而提供了最多的功能和性能。 ================================================ FILE: example/quick-start/frequently-asked-questions-about-swiftui.md ================================================ 有关 SwiftUI 的常见问题 === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 很多人在问我关于 SwiftUI 的问题，我也已经尽力去问其他知道得更多的人，并试图找到合适的明确答案。 所以，现在开始... ### 该学哪个？SwiftUI 还是 UIKit？ 这个问题已经被问过很多次了，所以我在本书中专门加了一章，以便能更详细地回答这个大问题：你应该学习 SwiftUI，UIKit，还是两者都学？ ### 在哪里可以使用 SwiftUI？ SwiftUI 可以在 iOS 13、macOS 10.15、tvOS 13 和 watchOS 6，以及这些平台的后续版本上运行。这意味着，如果你从事开发的应用必须支持 iOS N-1 甚至 N-2 ——即当前版本和之前的一两个版本--那么你能提供的功能就会受到限制。 然而，重要的是你不要把 SwiftUI 想成是一个类似于 Java 的 Swing 或 React Native 的多平台框架。官方的说法似乎是，SwiftUI 不是一个多平台框架，而是一个在多平台上创建应用程序的框架。 这听起来可能是一样的，但有一个重要的区别。苹果并不是说你可以在每个平台上使用相同的 SwiftUI 代码，因为有些事情是不可能的--例如，没有办法在 Mac 上使用苹果手表的数字表冠。 ### SwiftUI 是否取代了 UIKit？ SwiftUI 的许多部分直接建立在现有的 UIKit 组件之上，例如 UITableView。当然，还有许多其他部分不是--它们是由 SwiftUI 而非 UIKit 渲染的新控件。 但问题的关键不在于 UIKit 在多大程度上参与其中。相反，重点是我们并不关心。SwiftUI 或多或少地完全掩盖了 UIKit 的行为，所以如果你为 SwiftUI 编写应用程序，而即使苹果在两年内用一只会唱歌的大象取代了 UIKit，你也不必在意--只要苹果让大象兼容 UIKit 暴露给 SwiftUI 的相同方法和属性，你的代码就不会改变。 ### SwiftUI 是否使用自动布局？ 虽然 Auto Layout 肯定被用于幕后的一些事情，但它并没有暴露给我们这些 SwiftUI 开发者。相反，它使用了一个灵活的盒式布局系统，这对来自 web 端的开发者来说是很熟悉的。 ### SwiftUI 的速度快吗？ SwiftUI 的速度快得惊人--在我迄今为止的所有测试中，它似乎都超过了 UIKit。在与制作它的团队交谈后，我开始明白了其中的原因：首先，他们积极地扁平化了他们的层级结构，所以系统执行了更少的绘制，但其次，许多操作可以完全绕过 Core Animation，直接进入 Metal 以获得额外的速度。 所以，是的：SwiftUI 的速度快得惊人，而且我们不需要做任何额外的工作。 ### 为什么我不能看到我的代码预览？ 在使用 SwiftUI 时，能够同时看到视图的代码和视图的预览--它的外观--是非常有用的。 如果你能看到代码而不是预览，那么你有可能需要进入编辑器菜单并确保 Canvas 已启用。 ### 代码与预览的匹配程度如何？ 当你对预览做任何改变时，它也会更新生成的代码。同样地，如果你改变了代码，它也会更新用户界面。因此，代码和预览是相同的，并始终保持同步。 ### 为什么我的颜色看起来有点不对劲？ SwiftUI 给我们提供了标准的系统颜色，如红色、蓝色和绿色，但这些并不是你可能习惯的 UIColor 的纯红色、蓝色和绿色。相反，这些是自动适应明暗模式的新风格颜色，这意味着它们会根据你的系统外观看起来更亮或更暗。 ### UIKit 死了吗？ 不！苹果在 WWDC19 和 WWDC20 都推出了大量的新功能。如果苹果仍然在 WWDC 上谈论 UIKit 的新功能，那么你就相当安全了--他们不会有出其不意地退役的风险。 ### 你能混合使用 SwiftUI 和 UIKit 的视图吗？ 可以！你可以把一个嵌入到另一个里面，而且效果很好。 ================================================ FILE: example/quick-start/how-to-follow-this-quick-start-guide.md ================================================ 如何遵循这个快速入门指南 === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 这本指南被称为 "SwiftUI 实例"，因为它特别注重提供尽可能多的实例，每一个实例都能解决你每天都会遇到的实际问题。 从字面上看，我试图将其结构化，以便几乎每个条目都以 "如何...... "开始，因为这是在给你提供可以立即在你自己的项目中使用的实践代码。这也意味着我试图尽可能快地进入主题，并停留在那里，所以如果你正在寻找一个更长、更慢的 SwiftUI 介绍，恐怕这不是它。 ### 已经有一些经验了吗？ 如果你已经掌握了 SwiftUI 的基础知识，并且只想用代码来解决你的问题，那么你可以在你感兴趣的地方跳进去。 我的代码例子是专门为那些或多或少地按照线性方式编写的，所以如果你想做这些改变，你可能需要做一点轻微的编辑，使其适合你的代码。 ### 刚开始？ 如果你刚刚开始使用 SwiftUI，你应该按照大致的线性顺序来阅读本指南--只要继续阅读并点击下一步，直到你完成。我已经尽可能地编写了指南，使后面的章节建立在前面的章节之上，所以线性方法确实是一个好主意。 如果是你，你应该从使用 App 模板创建一个新的 iOS 应用开始。你叫它什么并不重要，但我希望你确保选择 SwiftUI 作为你的界面，选择 SwiftUI App 作为你的生命周期，否则本指南的其余部分确实会非常混乱。 ================================================ FILE: example/quick-start/migrating-from-uikit-to-swiftui.md ================================================ 从 UIKit 迁移到 SwiftUI === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 如果你以前使用过 UIKit，你所知道和喜爱的许多类，只要去掉 `UI` 的前缀，就可以直接映射到它们的SwiftUI 等价物。这并不意味着它们在本质上是一样的，只是它们有相同或相似的功能。 这里有一个列表可以让你开始，UIKit 类的名字后面是 SwiftUI 的名字： * `UITableView`: `List` * `UICollectionView`: `LazyVGrid` and `LazyHGrid` * `UILabel`: `Text` * `UITextField`: `TextField` * `UITextField` with `isSecureTextEntry` set to true: `SecureField` * `UITextView`: `TextEditor` (plain strings only) * `UISwitch`: `Toggle` * `UISlider`: `Slider` * `UIButton`: `Button` * `UINavigationController`: `NavigationView` * `UIAlertController` with style `.alert`: `Alert` * `UIAlertController` with style `.actionSheet`: `ActionSheet` * `UIStackView` with horizontal axis: `HStack` * `UIStackView` with vertical axis: `VStack` * `UIImageView`: `Image` * `UISegmentedControl`: `Picker` * `UIStepper`: `Stepper` * `UIDatePicker`: `DatePicker` * `UIProgressView`: `ProgressView` with a value * `UIActivityIndicatorView`: `ProgressView` without a value * `NSAttributedString`: Incompatible with SwiftUI; use `Text` instead. 还有许多其他的组件是 SwiftUI 独有的，比如说堆栈视图（stack view），它让我们可以按深度而不是按水平或垂直方向来构建东西。 ================================================ FILE: example/quick-start/swiftui-vs-interface-builder-and-storyboards.md ================================================ SwiftUI vs Interface Builder 和 storyboards === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 有经验的 `iOS` 开发者都熟悉 `Interface Builder` 和 `storyboards`，甚至可能还有 `XIBs`。他们可能不喜欢这些东西，但他们至少熟悉。如果你以前没有使用过这些，你应该跳过这一段。 还在这里？这意味着你以前用过 `IB`，可能很好奇 `SwiftUI` 有什么不同。好吧，让我问你：你有没有手动编辑过 `storyboards` 或 `XIB` 源文件？ 可能没有。好吧，除了那一次，但大致的答案是没有 — `storyboards` 和 `XIB` 包含相当多的 `XML` 语句，不容易阅读，也不容易编辑。 更糟的是，`storyboards` 有一个特性，就是随着时间的推移越来越大。当然，它们开始时可能很小，但后来你又增加了一个视图控制器，又增加了一个，又增加了一个，突然你意识到你在一个文件里有 10 个页面的数据，你所做的任何源控制的改变突然变得相当痛苦。 但是，虽然存在单点故障不是很好，而且当有人提交有关 `storyboards` 的修改并尝试 `pull request` 请求时，基本上不可能看到有什么变化，但 `storyboards` 和 XIBs 有一个更大的问题。 你看，`Interface Builder` 对我们的 `Swift` 代码不了解，而 `Swift` 代码对 `Interface Builder` 也不了解。因此，我们最终会有很多不安全的功能：我们从 `IB` 中按 `Ctrl` 键拖动到我们的代码中，将一些东西连接到一个动作，但如果我们随后删除该动作，代码仍然可以编译 - IB 真的不介意它打算调用的代码不再存在。 同样地，当我们从 storyboards 中创建视图控制器或删除表格视图单元时，我们使用字符串来识别代码中的重要对象--这个系统如此普遍，它甚至有自己的名字："字符串类型的 APIs"。即便如此，我们也需要使用类型转换，因为 Swift 无法知道它找回的表视图单元实际上是一个`MooncakeTableViewCell`。 这些问题的存在是因为 `IB` 和 `Swift` 是非常独立的东西。这并不令人惊讶 -- `Interface Builder` 不仅在最初的 `Mac OS X` 出现之前就已经存在，而且它在很大程度上是围绕 `Objective-C` 的工作方式设计的。 SwiftUI 与过去有了很大的区别。它是一个只适用于 `Swift` 的框架，并不是因为苹果决定现在是 `Objective-C` 消亡的时候了，而是因为它让 `SwiftUI` 利用了 `Swift` 的全部功能--值类型、不透明的返回类型、协议扩展等等。 不管怎么说，我们很快就会了解到 `SwiftUI` 的具体运作方式。现在，你至少需要知道的是，`SwiftUI` 解决了人们在旧的 `Swift` + `Interface Builder` 方法中遇到的许多问题。 * 我们不必再为程序化设计或基于 `storyboards` 的设计争论不休，因为 `SwiftUI` 同时提供了两者。 * 我们不再需要担心在提交用户界面相关的工作时产生源代码控制问题，因为代码比 `storyboards` 的 `XML` 更容易阅读和管理。 * 我们不再需要为字符串类型的 API 担心那么多--仍然有一些，但明显减少。 * 我们不再需要担心调用不存在的函数，因为我们的用户界面会被 `Swift` 编译器检查。 所以，我希望你会同意，迁移到 `SwiftUI` 有很多好处。 ================================================ FILE: example/quick-start/what-is-swiftui.md ================================================ 什么是 SwiftUI? === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) SwiftUI 是一个用户界面工具包，让我们以声明的方式设计应用程序。这是一种花哨的说法，即我们告诉 SwiftUI 我们希望我们的用户界面看起来和工作起来是怎样的，而它会在用户与它交互的过程中实现这一目标。 声明式用户界面与命令式用户界面相比更容易理解，后者是 iOS 开发者在 iOS 13 之前所做的。在命令式用户界面中，当一个按钮被点击时，我们可能会调用一个函数，在这个函数中我们会读取一个值并显示一个标签 —— 我们会根据正在发生的事情定期修改用户界面的外观和工作方式。 强制性的用户界面导致了各种问题，其中大部分都是围绕着状态展开的，这是另一个花哨的术语，意思是 "我们在代码中存储的值"。我们需要跟踪我们的代码处于什么状态，并确保我们的用户界面正确地反映这种状态。 如果在屏幕上有一个影响用户界面的布尔属性，我们就有两种状态：布尔值可能是开（`on`）或关（`off`）。如果我们有两个布尔值 A 和 B，我们现在有四个状态： * A = off，B = off * A = on，B = off * A = off，B = on * A = on，B = on 如果我们有三个布尔运算符呢？或者五个？或者是整数、字符串、日期，以及更多？那么，应用的复杂性就会进一步提高。 如果你曾经使用过一个应用程序，无论你尝试多少次都说你有一条未读信息，这就是状态问题--这就是命令式 UI 的问题。 相比之下，声明式 UI 让我们可以一次性告诉 iOS 关于我们应用的所有可能状态。我们可以说，如果我们登录了，就显示一条欢迎信息，如果我们注销了，就显示登录按钮。我们不需要用手写代码在这两种状态之间移动--那是一种丑陋的、强制性的工作方式！相反，我们让 SwiftUI 在这两种状态之间移动。 相反，当状态发生变化时，我们让 SwiftUI 在用户界面布局之间为我们移动。我们已经告诉它根据用户是登录还是退出来显示什么，所以当我们改变认证状态时，SwiftUI 可以替我们更新用户界面。 这就是声明性的意思：我们并没有让 SwiftUI 组件手动显示和隐藏，我们只是告诉它我们希望它遵循的所有规则，让 SwiftUI 确保这些规则得到执行。 但 SwiftUI 并不局限于此--它还作为一个跨平台的用户界面层，可以在 iOS、macOS、tvOS 甚至watchOS 上运行。这意味着你现在可以学习一种语言和一个布局框架，然后将你的代码部署到任何地方。 ================================================ FILE: example/quick-start/whats-in-the-basic-template.md ================================================ 基本模板是什么？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 提示：你可能认为这一章完全可以跳过，但除非你是一个 Swift 天才，否则你应该读到最后，以确定这一点。 基本的 App 模板给了你以下内容： 1. YourProjectName.swift。这将执行一个初始设置，然后创建并显示你的初始视图。 2. ContentView.swift。这是我们最初的一块用户界面。如果这是一个 UIKit 项目，这将是 Xcode 给我们的 ViewController 类。 3. Assets.xcassets。这是一个资产目录，它存储了我们项目中使用的所有图片和颜色。 4. Info.plist 是一个属性列表文件，在这个例子中，它用于存储我们的应用程序的系统范围内的设置--例如，在 iOS 主屏幕上的图标下面应该显示什么名字。 5. 一个名为 Preview Content（预览内容）的组，包含另一个名为 Preview Assets （预览资产）的资产目录。 就是这样--它的代码和资源数量少得令人高兴，这意味着我们可以在此基础上进行开发。 我们真正关心的部分--事实上，在这里它是唯一重要的部分--是 `ContentView.swift`。这是我们应用程序的主要功能部分，我们可以在这里开始尝试各种 SwiftUI 代码，只需一会儿。 首先，是什么让 `ContentView.swift` 显示在屏幕上？ 好吧，如果你记得我说过，`YourProjectName.swift` 负责管理你的应用程序的显示方式。显然，它实际上不叫这个名字--它将根据你在创建项目时选择的项目名称来命名。 现在继续打开这个文件，你会看到里面有这样的代码： ```swift @main struct YourProjectName: App { var body: some Scene { WindowGroup { ContentView() } } } ``` 这段代码创建了一个新的 `ContentView` 实例（这是我们即将要研究的主要功能），并把它放在一个窗口组中，使它在屏幕上可见。通过显示 `ContentView` 的第一个实例，它有效地引导了我们的应用程序，然后就交给我们了--你想做什么？ 打开 `ContentView.swift`，让我们看看一些实际的 SwiftUI 代码。你应该看到这样的代码： ```swift import SwiftUI struct ContentView: View { var body: some View { Text("Hello, world!") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ``` 这里的代码量不是很多，但它确实包含了很多东西。 首先，注意 `ContentView` 是一个结构体。熟悉 UIKit 的开发者会知道这一点很重要--我们的用户界面可以从所有的不变性和简单的值类型中获益，不熟悉 UIKit 的人......那就点头微笑吧--你永远不知道我们曾经的痛苦。 第二，`ContentView` 遵守 `View` 协议。你想在 SwiftUI 中显示的所有东西都需要遵守 `View` ，而这实际上只意味着一件事：你需要有一个叫做 `body` 的属性来返回某种类型的 `View`。 第三，`body` 的返回类型是 `some View`。`some` 关键字是在 Swift 5.1 中引入的，是一个叫做不透明返回类型的功能的一部分，在这种情况下，它的意思就是 "这将返回某种视图，但 SwiftUI 不需要知道（或关心）什么"。 **重要**。返回 `some View` 意味着 `body` 属性将返回遵守 `View` 协议的东西。你不能忘记返回任何东西--否则 Swift 编译器会拒绝构建你的代码。 第四，在 `body` 属性里面有 `Text("Hello World")`，它创建了一个文本 "Hello World"的标签。 第五，`Text` 视图下面有一个 `padding()` 方法调用。在 SwiftUI 中，这实际上创建了一个新的视图，周围有填充物，而不是改变现有的 `Text` 视图。因此，我们称这些修饰符（modifiers）而不是方法，是因为它们创建了修改过的内容。 最后，在 `ContentView` 下面有一个类似但又不同的结构，叫做 `ContentView_Previews`。它不遵守 `View` 协议，因为它是专门用来在 Xcode 中显示视图预览的，而不是在真正的应用中显示在屏幕上。这段代码只有在我们的应用程序在调试环境中运行时才被内置到成品中，因为它在生产应用程序中没有意义。 我们很快就会更详细地了解这些组件，但首先让我们来看看 `Text` 组件... ================================================ FILE: example/responding-to-events/demo1/Demo/Demo.xcodeproj/project.pbxproj ================================================ // 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"512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo1/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo1/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @Environment(\.scenePhase) var scenePhase var body: some View { VStack { Text("Example Text") .onChange(of: scenePhase) { newPhase in if newPhase == .inactive { print("Inactive") } else if newPhase == .active { print("Active") } else if newPhase == .background { print("Background") } } } .frame(width: 380, height: 300, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/responding-to-events/demo1/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/responding-to-events/demo1/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/responding-to-events/demo1/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/responding-to-events/demo1/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/responding-to-events/demo1/README.md ================================================ 如何使用 `scenePhase` 检测您的应用何时移至背景或前景？ === 现在，您可以向自己的身体添加任何逻辑，或者使用 `onChange()` 直接观察变化。 作为示例，我们可以编写一个视图来监视 `scenePhase` 并在阶段更改时将一些文本输出到 `Xcode` 的调试控制台中： ```swift struct ContentView: View { @Environment(\.scenePhase) var scenePhase var body: some View { Text("Example Text") .onChange(of: scenePhase) { newPhase in if newPhase == .inactive { print("Inactive") } else if newPhase == .active { print("Active") } else if newPhase == .background { print("Background") } } } } ``` 如您所见，存在三种状态： 1. 当您的应用位于前台并与用户进行交互时，将使用“活动”状态，这意味着他们现在正在使用它。 2. 当您的应用当前不可见时，将使用“背景”状态，因此您应减少工作量。 3. 当您的应用可见但未与用户直接交互时，将使用“非活动”状态。 例如，如果您在运行应用程序时进入多任务处理模式–您可以在其他窗口旁边看到您的应用程序窗口，但您并未直接使用它。 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"1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo2/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo2/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { var body: some View { NavigationView { VStack { NavigationLink(destination: DetailView()) { Text("Hello World") } } } .onAppear { print("ContentView appeared!") } .onDisappear { print("ContentView disappeared!") } } } struct DetailView: View { var body: some View { VStack { Text("Second View") } .onAppear { print("DetailView appeared!") } .onDisappear { print("DetailView disappeared!") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/responding-to-events/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/responding-to-events/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/responding-to-events/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/responding-to-events/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/responding-to-events/demo2/README.md ================================================ 如何响应查看生命周期事件：`onAppear()` 和 `onDisappear()` ？ === SwiftUI 以 `onAppear()` 和 `onDisappear()` 的形式为我们提供了 `UIKit` 的 `viewDidAppear()` 和 `viewDidDisappear()` 的等效项。 您可以将任何代码附加到所需的这两个事件上，`SwiftUI` 将在它们发生时执行它们。 例如，这将创建两个视图，这些视图使用 `onAppear()` 和 `onDisappear()` 打印消息，并带有一个导航链接在两个视图之间移动： ```swift struct ContentView: View { var body: some View { NavigationView { VStack { NavigationLink(destination: DetailView()) { Text("Hello World") } } } .onAppear { print("ContentView appeared!") } .onDisappear { print("ContentView disappeared!") } } } struct DetailView: View { var body: some View { VStack { Text("Second View") } .onAppear { print("DetailView appeared!") } .onDisappear { print("DetailView disappeared!") } } } ``` 运行该代码后，您应该能够在两个视图之间移动，并查看 `Xcode` 调试控制台中打印的消息。 ================================================ FILE: example/responding-to-events/demo3/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D793A3026048CAB00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793A1D26048CAA00A87448 /* DemoApp.swift */; }; 7D793A3126048CAB00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793A1D26048CAA00A87448 /* DemoApp.swift */; }; 7D793A3226048CAB00A87448 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793A1E26048CAA00A87448 /* ContentView.swift */; }; 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{ "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo3/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo3/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { var body: some View { VStack { Button("Run") { print("Running…") } .keyboardShortcut("r", modifiers: .shift) Button("Home") { print("Going home") } .keyboardShortcut("h", modifiers: [.control, .option, .command]) Button("Confirm Launch") { print("Launching drone…") } .keyboardShortcut(.defaultAction) } .frame(width: 380, height: 360, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/responding-to-events/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/responding-to-events/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/responding-to-events/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/responding-to-events/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/responding-to-events/demo3/README.md ================================================ 如何使用 `keyboardShortcut()` 添加键盘快捷键？ === 通过 `SwiftUI`，可以轻松地为所有支持它的设备（例如iPadOS和macOS）添加键盘快捷键，而这些快捷键都可以使用 `keyboardShortcut()` 修饰符。 您可以通过三种方式使用此修饰符，因此从最基本的角度开始：将键附加到现有操作。 例如，如果我们有一个登录按钮，并且想在用户按下 `Cmd + L` 时触发其行为，我们可以这样做： ```swift Button("Log in") { print("Authenticating…") } .keyboardShortcut("l") ``` 请注意，我们不需要指定 `Cmd + L` ，因为除非另行指定，否则 `SwiftUI` 会假定使用 `Command` 键。 如果您在 iPad 上运行该代码示例，将会看到按住 `Cmd` 键会弹出键盘快捷键叠加层，已经显示 “Cmd + L Login” – SwiftUI 会自动弄清楚我们的按钮做了什么并使它可用。 使用 `keyboardShortcut()` 的第二种方法是指定您实际需要的修饰键。 例如，这将创建另外两个按钮，一个按钮使用 `Shift + R` 触发 `Run` 按钮，另一个按钮使用 `Ctrl + Opt + Cmd + H` 触发 `Home` 按钮： ```swift VStack { Button("Run") { print("Running…") } .keyboardShortcut("r", modifiers: .shift) Button("Home") { print("Going home") } .keyboardShortcut("h", modifiers: [.control, .option, .command]) } ``` 这说明了如何选择一个自定义修饰符，以及如何同时选择多个修饰符。 使用 `keyboardShortcut()` 的第三种也是最后一种方法是使用其内置键之一，这对于难以键入的键（例如 `Escape` 和 `Arrow`）以及语义键（例如取消操作和默认操作）很有用。 语义键确实非常有用-每次您按回车键接受警报的默认操作，或者每次按 `Escape` 键取消操作时，您都在使用语义键。 因此，这将创建一个具有默认操作快捷方式的按钮，这意味着按 Return 键将触发该按钮： ================================================ FILE: example/responding-to-events/demo4/Demo/Demo.xcodeproj/project.pbxproj 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================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { struct HomeView: View { var body: some View { Text("Home!") .padding() } } struct ContactsView: View { var body: some View { Text("Contacts!") .padding() } } struct LocationView: View { var body: some View { Text("Location!") .padding() } } struct AccountView: View { var body: some View { Text("Account!") .padding() } } var body: some Scene { WindowGroup { TabView { HomeView() ContactsView() LocationView() AccountView() } } } } ================================================ FILE: example/responding-to-events/demo4/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) 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CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/responding-to-events/demo4/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/responding-to-events/demo4/README.md ================================================ 如何控制应用启动时显示的视图？ === 当您创建一个新的 SwiftUI 项目时，`Xcode` 会自动创建一个与您的项目同名的新 Swift 文件，该文件将用于引导您的应用程序 – 展示您的初始用户界面。 例如，默认文件如下所示： ```swift struct SwiftUITestApp: App { var body: some Scene { WindowGroup { ContentView() } } } ``` 因此，您可以将 `ContentView` 更改为要显示的其他任何视图。 但是，这是设置所需的所有核心UI（例如选项卡视图）的好地方： ```swift WindowGroup { TabView { HomeView() ContactsView() LocationView() AccountView() } } ``` ================================================ FILE: example/responding-to-events/demo5/Demo/Demo.xcodeproj/project.pbxproj 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================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { init() { UserDefaults.standard.register(defaults: [ "name": "Taylor Swift", "highScore": 10 ]) } var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/responding-to-events/demo5/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations 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com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/responding-to-events/demo5/README.md ================================================ 应用启动时如何运行代码？ === 当您使用 `SwiftUI` 应用生命周期时，您的应用会通过一种符合应用协议的结构启动。 它的工作是使用 `WindowGroup`，`DocumentGroup` 或类似名称创建初始视图，但是由于它是在任何实际视图之前创建的，因此这是在应用启动时运行代码的理想场所。 例如，如果您想设置一些初始 `UserDefaults` 值，则应用程序的初始化程序是校准 `register(defaults:)` 的好地方。此方法设置默认默认值，我的意思是仅在设置用户默认值之前存在 `UserDefaults` 值的初始值-一旦您提供自己的值，这些默认值将不再使用，并且这些初始值也会在出现以下情况时消失 您的应用已终止，因此您应该在每次启动时都将其称为“确定”。 因此，我们可能会这样写： ```swift @main struct ExampleApp: App { // 每次启动时注册初始 UserDefaults 值 init() { UserDefaults.standard.register(defaults: [ "name": "Taylor Swift", "highScore": 10 ]) } var body: some Scene { WindowGroup { ContentView() } } } ``` 该 `initializer()` 在调用 `body` 属性之前运行，因此也在 `ContentView` 调用之前运行。 因此，您在 `ContentView` 中读取 `UserDefaults` 的任何位置都已经具有您的默认值。 为了说明这一点，下面是一个使用 `@AppStorage` 读取 `name` 键的 `ContentView` 结构示例： ```swift struct ContentView: View { @AppStorage("name") var name = "匿名" var body: some View { Text("您的名字是 \(name).") } } ``` 使用 `@AppStorage` 要求我们为属性提供一个初始值，这很麻烦，因为我们需要确保在使用该属性的所有地方都具有相同的初始值。 但是，这并不重要：“匿名”仅用于不存在任何值且未注册任何初始默认值的时间。 我们已经在应用程序的初始化程序中调用了 `register(defaults:)`，因此该视图将显示 `您的名字是 Taylor Swift`。 ================================================ FILE: example/responding-to-events/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo6/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : 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example/responding-to-events/demo6/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/19. // import SwiftUI class AppDelegate: NSObject, UIApplicationDelegate { func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool { print("Your code here") return true } } struct ContentView: View { var body: some View { Text("Hello, world!") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/responding-to-events/demo6/Demo/Demo/DemoApp.swift 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IDEDidComputeMac32BitWarning ================================================ FILE: example/responding-to-events/demo6/README.md ================================================ 如何将 `AppDelegate` 添加到 SwiftUI 应用？ === SwiftUI 应用程序使用符合 `App` 协议的自定义结构启动，但有时您可能想找回我们曾经拥有的旧 `UIApplicationDelegate` 功能 - 也许处理推送通知的注册，响应内存警告，检测时间变化， 等等。 为此，首先创建一个自定义类，该类继承自 `NSObject` 并符合 `UIApplicationDelegate` 协议，如下所示： ```swift class AppDelegate: NSObject, UIApplicationDelegate { func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool { print("Your code here") return true } } ``` 我在其中添加了 `didFinishLaunchingWithOptions`，但是您只需要实现您关心的方法即可。 现在，在您的 `App` 场景中，使用 `UIApplicationDelegateAdaptor` 属性包装器告诉 `SwiftUI` 它应为应用程序委托使用 `AppDelegate` 类。 ```swift @main struct NewIn14App: App { @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate var body: some Scene { WindowGroup { ContentView() } } } ``` SwiftUI 负责创建该委托并照顾其生命周期，因此您可以继续向该类添加任何其他应用程序委托功能以进行调用。 提示：对于推送通知，您可能应该调整 `UNUserNotificationCenter.current()` 的委托属性，以使其指向您拥有的自定义类。 ================================================ FILE: example/responding-to-events/demo7/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo7/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo7/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo7/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/19. // import SwiftUI // 我们的自定义视图修饰符可跟踪旋转并调用我们的操作 struct DeviceRotationViewModifier: ViewModifier { let action: (UIDeviceOrientation) -> Void func body(content: Content) -> some View { content .onAppear() .onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in action(UIDevice.current.orientation) } } } // 一个视图包装器，使修改器更易于使用 extension View { func onRotate(perform action: @escaping (UIDeviceOrientation) -> Void) -> some View { self.modifier(DeviceRotationViewModifier(action: action)) } } // 示例视图以演示解决方案 struct ContentView: View { @State private var orientation = UIDeviceOrientation.unknown var body: some View { Group { if orientation.isPortrait { Text("Portrait") } else if orientation.isLandscape { Text("Landscape") } else if orientation.isFlat { Text("Flat") } 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================================================ ================================================ FILE: example/responding-to-events/demo7/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/responding-to-events/demo7/Demo/Demo.xcodeproj/xcshareddata/xcschemes/Demo.xcscheme ================================================ ================================================ FILE: example/responding-to-events/demo7/README.md ================================================ 如何检测设备旋转？ === SwiftUI 没有内置的方法来检测用户在纵向和横向之间旋转设备，但是我们可以使用自定义修饰符来响应 `UIDevice.orientationDidChangeNotification` 通知。 这需要三个步骤： 1. 创建一个自定义视图修改器，以监视方向变化并在发生变化时运行回调函数。 这不是必需的，但是我们将使回调接受 `UIDeviceOrientation` 作为其唯一参数，以防万一您需要了解当前方向。 2. 将视图修改器包装到 `View` 扩展程序中，以便更轻松地调用。 3. 根据您的选择使用自定义修饰符。 ```swift // 我们的自定义视图修饰符可跟踪旋转并调用我们的操作 struct DeviceRotationViewModifier: ViewModifier { let action: (UIDeviceOrientation) -> Void func body(content: Content) -> some View { content .onAppear() .onReceive(NotificationCenter.default.publisher(for: UIDevice.orientationDidChangeNotification)) { _ in action(UIDevice.current.orientation) } } } // 一个视图包装器，使修改器更易于使用 extension View { func onRotate(perform action: @escaping (UIDeviceOrientation) -> Void) -> some View { self.modifier(DeviceRotationViewModifier(action: action)) } } // 示例视图以演示解决方案 struct ContentView: View { @State private var orientation = UIDeviceOrientation.unknown var body: some View { Group { if orientation.isPortrait { Text("Portrait") } else if orientation.isLandscape { Text("Landscape") } else if orientation.isFlat { Text("Flat") } else { Text("Unknown") } } .onRotate { newOrientation in orientation = newOrientation } } } ``` 请记住，设备方向并不是您所期望的那样有用。 是的，在 `iPhone` 上横向放置意味着您的水平空间比垂直方向要大，但是在 `iPad` 上，您的应用程序可以在分屏模式下横向运行-从技术上讲，整个屏幕的宽度仍然大于高度，但是 分配给我们应用程序的实际空间只是该宽度的一小部分。 ================================================ FILE: example/responding-to-events/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo8/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo8/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/10/20. // import SwiftUI @available(iOS 15.0, *) struct ContentView: View { @State private var name = "Taylor" var body: some View { TextField("Enter your name", text: $name) .textFieldStyle(.roundedBorder) .toolbar { ToolbarItemGroup(placement: .keyboard) { Button("Click me!") { print("Clicked") } } } ContentViewMore() } } @available(iOS 15.0, *) struct ContentViewMore: View { @State private var name = "Taylor Swift" @FocusState var isInputActive: Bool var body: some View { NavigationView { TextField("Enter your name", text: $name) .textFieldStyle(.roundedBorder) .focused($isInputActive) .toolbar { ToolbarItemGroup(placement: .keyboard) { Spacer() Button("Done") { isInputActive = false } } } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { if #available(iOS 15.0, *) { ContentView() } else { // Fallback on earlier versions } } } ================================================ FILE: 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5.0; TARGETED_DEVICE_FAMILY = "1,2"; }; name = Release; }; /* End XCBuildConfiguration section */ /* Begin XCConfigurationList section */ 7D35413227206721002D62E6 /* Build configuration list for PBXProject "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D35414327206724002D62E6 /* Debug */, 7D35414427206724002D62E6 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; 7D35414527206724002D62E6 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D35414627206724002D62E6 /* Debug */, 7D35414727206724002D62E6 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D35412F27206721002D62E6 /* Project object */; } ================================================ FILE: example/responding-to-events/demo8/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/responding-to-events/demo8/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/responding-to-events/demo8/README.md ================================================ 如何在键盘上添加工具栏？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) `SwiftUI` 允许我们向键盘添加输入附件视图，这意味着当用户激活某些文本输入时，我们可以在那里显示自定义按钮。 这一切都是通过将 `toolbar()` 修饰符附加到应该拥有输入附件的任何视图来完成的。 创建工具栏项组时，使用 `.keyboard` 放置将此工具栏附加到键盘，如下所示： ```swift @available(iOS 15.0, *) struct ContentView: View { @State private var name = "Taylor" var body: some View { TextField("Enter your name", text: $name) .textFieldStyle(.roundedBorder) .toolbar { ToolbarItemGroup(placement: .keyboard) { Button("Click me!") { print("Clicked") } } } } } ``` ![](./imgs/001.png) 🚧 重要提示：在 `Xcode 13 beta 1` 中，这需要 `NavigationView` 才能工作。 实际上，这是使用 `@FocusState` 之类的东西在 `UI` 中的输入字段之间移动或完全隐藏键盘的好地方，如下所示： ```swift @available(iOS 15.0, *) struct ContentViewMore: View { @State private var name = "Taylor Swift" @FocusState var isInputActive: Bool var body: some View { NavigationView { TextField("Enter your name", text: $name) .textFieldStyle(.roundedBorder) .focused($isInputActive) .toolbar { ToolbarItemGroup(placement: .keyboard) { Spacer() Button("Done") { isInputActive = false } } } } } } ``` ![](./imgs/002.png) ================================================ FILE: example/responding-to-events/demo9/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo9/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo9/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/responding-to-events/demo9/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct Message: Decodable, Identifiable { let id: Int let cnname: String let name: String let fullname: String let alpha2: String let alpha3: String let numeric: Int } struct ContentView: View { @State private var messages = [Message]() var body: some View { if #available(iOS 15.0, *) { NavigationView { List(messages) { message in VStack(alignment: .leading) { Text(message.cnname) .font(.headline) Text(message.name) } } .navigationTitle("Inbox") } .task { do { let url = URL(string: "https://unpkg.com/province-city-china@8.0.0/dist/country.json")! let (data, _) = try await URLSession.shared.data(from: url) messages = try JSONDecoder().decode([Message].self, from: data) } catch { messages = [] } } } else { EmptyView() // Fallback on earlier versions } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/responding-to-events/demo9/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } 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================================================ // // ContentView.swift // Demo2 // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { let sites = ["Apple.com", "wangchujiang.com", "Swift.org"] var body: some View { NavigationView { List(sites, id: \.self) { site in NavigationLink(site) { SourceViewer(site: site) } } .navigationTitle("View Source") } } } struct SourceViewer: View { let site: String @State private var sourceCode = "Loading…" var body: some View { if #available(iOS 15.0, *) { ScrollView { Text(sourceCode) .font(.system(.body, design: .monospaced)) } .task { guard let url = URL(string: "https://\(site)") else { return } do { let (data, _) = try await URLSession.shared.data(from: url) sourceCode = String(decoding: data, as: UTF8.self).trimmingCharacters(in: .whitespacesAndNewlines) } catch { sourceCode = "Failed to fetch site." } } } else { EmptyView() // Fallback on earlier versions } } } struct ContentView_Previews: PreviewProvider { static 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================================================ FILE: example/responding-to-events/demo9/Demo2/Demo2.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/responding-to-events/demo9/Demo2/Demo2.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/responding-to-events/demo9/README.md ================================================ 显示视图时如何运行异步任务？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) `SwiftUI` 的 `task()` 修饰符是 `onAppear()` 的更强大版本，允许我们在显示视图时立即开始异步工作。 更好的是，如果视图尚未完成，任务将在视图被销毁时自动取消。 由于任务是异步执行的，因此这是为您的视图获取一些初始网络数据的好地方。 例如，如果我们想从服务器获取消息列表，将其解码为 `Message` 结构数组，然后将其显示在列表中，我们可能会这样写： ```swift struct Message: Decodable, Identifiable { let id: Int let cnname: String let name: String let fullname: String let alpha2: String let alpha3: String let numeric: Int } struct ContentView: View { @State private var messages = [Message]() var body: some View { if #available(iOS 15.0, *) { NavigationView { List(messages) { message in VStack(alignment: .leading) { Text(message.cnname) .font(.headline) Text(message.name) } } .navigationTitle("Inbox") } .task { do { let url = URL(string: "https://unpkg.com/province-city-china@8.0.0/dist/country.json")! let (data, _) = try await URLSession.shared.data(from: url) messages = try JSONDecoder().decode([Message].self, from: data) } catch { messages = [] } } } else { // Fallback on earlier versions } } } ``` ![](./imgs/001.png) 您可以将 `task()` 修饰符附加到层次结构中的任何视图，即使是由于导航推送而呈现的视图——它只会在视图显示时才真正开始工作。 为了证明这一点，我们可以创建一个简单的网站源代码查看器，用户可以在其中选择要检查的网站： ```swift struct ContentView: View { let sites = ["Apple.com", "wangchujiang.com", "Swift.org"] var body: some View { NavigationView { List(sites, id: \.self) { site in NavigationLink(site) { SourceViewer(site: site) } } .navigationTitle("View Source") } } } struct SourceViewer: View { let site: String @State private var sourceCode = "Loading…" var body: some View { if #available(iOS 15.0, *) { ScrollView { Text(sourceCode) .font(.system(.body, design: .monospaced)) } .task { guard let url = URL(string: "https://\(site)") else { return } do { let (data, _) = try await URLSession.shared.data(from: url) sourceCode = String(decoding: data, as: UTF8.self).trimmingCharacters(in: .whitespacesAndNewlines) } catch { sourceCode = "Failed to fetch site." } } } else { EmptyView() // Fallback on earlier versions } } } ``` `task()` 和 `onAppear()` 都能够在您查看显示时运行同步函数，因此除了个人品味之外，没有特别的理由选择其中一个 - 将 `onAppear()` 和 `onDisappear()` 放在一起是一个很好的平衡 . 提示：默认情况下，使用 `task()` 修饰符创建的 `Swift` 任务将以最高的可用优先级运行，但如果您知道工作不太重要，则可以将自定义优先级传递给修饰符。 ================================================ FILE: example/stacks-grids-scrollviews/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo1/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo1/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { VStack { Text("SwiftUI") Text("rocks") } HStack { Text("SwiftUI") Text("rocks") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: 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================================================ FILE: example/stacks-grids-scrollviews/demo1/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/stacks-grids-scrollviews/demo1/README.md ================================================ 如何使用 `VStack` 和 `HStack` 创建堆栈？ === 我们的 `SwiftUI` 内容视图必须包含一个或多个视图，这是我们希望它们显示的布局。 当我们一次想要在屏幕上显示多个视图时，通常需要告诉 `SwiftUI` 如何安排它们，这就是堆栈的存放位置。 堆栈-等同于 `UIKit` 中的 `UIStackView` - 分为三种形式：水平(HStack)，垂直(VStack)和基于深度(ZStack)，当您要放置子视图以使其重叠时可以使用后者。 让我们从简单的事情开始。 这是一个文本视图： ```swift Text("SwiftUI") ``` 如果我们想在下面放置另一个，我们不能只创建第二个文本视图并希望达到最佳效果 – `SwiftUI` 不知道如何排列它们。 相反，我们需要将其放置在垂直堆栈中，以便我们的文本视图彼此重叠放置： ```swift VStack { Text("SwiftUI") Text("rocks") } ``` 您会注意到，垂直堆栈位于屏幕的中心，标签也居中，并且标签之间也有一些自动间隔。 如果您希望水平并排放置标签，则将 `VStack` 替换为 `HStack`，如下所示： ```swift HStack { Text("SwiftUI") Text("rocks") } ``` 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Text("Example \(i)") .font(.title) .frame(width: 200, height: 200) .background(colors[i % colors.count]) .id(i) } } } .frame(height: 350) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/stacks-grids-scrollviews/demo10/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/18. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/stacks-grids-scrollviews/demo10/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/stacks-grids-scrollviews/demo10/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/stacks-grids-scrollviews/demo10/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo10/README.md ================================================ 如何使用 `ScrollViewReader` 使滚动视图移动到某个位置？ === 如果您想以编程方式使 SwiftUI 的 `ScrollView` 移至特定位置，则应在其中嵌入 `ScrollViewReader`。 这提供了一个 `scrollTo()` 方法，仅通过提供其锚即可将其移动到父 `scrollview` 内部的任何视图。 例如，这将在垂直滚动视图中创建 `100` 个彩色框，并且当您按下按钮时，它将直接滚动到 ID 为 8 的框： ```swift struct ContentView: View { let colors: [Color] = [.red, .green, .blue] var body: some View { ScrollView { ScrollViewReader { value in Button("Jump to #8") { value.scrollTo(8) } .padding() ForEach(0..<100) { i in Text("Example \(i)") .font(.title) .frame(width: 200, height: 200) .background(colors[i % colors.count]) .id(i) } } } .frame(height: 350) } } ``` 为了更好地控制滚动，可以指定另一个参数称为 `anchor` ，以控制滚动完成后应将目标视图放置在何处。 例如，这将滚动到与以前相同的视图，只是这次将视图置于顶部： ```swift struct ContentView: View { let colors: [Color] = [.red, .green, .blue] var body: some View { ScrollView { ScrollViewReader { value in Button("Jump to #8") { value.scrollTo(8, anchor: .top) } .padding() ForEach(0..<100) { i in Text("Example \(i)") .font(.title) .frame(width: 200, height: 200) .background(colors[i % colors.count]) .id(i) } } } .frame(height: 350) } } ``` 如果在 `withAnimation()` 中调用 `scrollTo()` ，则将对动画进行动画处理。 提示：`scrollTo()` 也适用于列表！ ================================================ FILE: example/stacks-grids-scrollviews/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7935DB260332D300A87448 /* DemoApp.swift in Sources 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$0.translation } .onEnded { _ in withAnimation(.spring()) { dragAmount = .zero } } ) } .frame(width: 400, height: 400) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/stacks-grids-scrollviews/demo11/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/18. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/stacks-grids-scrollviews/demo11/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 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LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/stacks-grids-scrollviews/demo11/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo11/README.md ================================================ 如何使用 `ScrollView` 和 `GeometryReader` 创建3D效果(如Cover Flow)？ === 如果将 `GeometryReader` 与任何可以改变位置的视图（例如具有拖动手势或位于 `List` 内的视图）结合使用，我们可以创建在屏幕上看起来很棒的3D效果。`GeometryReader` 允许我们读取视图的坐标，并将这些值直接输入到 `rotation3DEffect()` 修饰符中。 例如，我们可以通过在滚动视图中水平堆叠许多文本视图，然后应用 `rotation3DEffect()` 来创建 `Cover Flow` 样式的滚动效果，这样当它们在滚动视图中移动时，它们会缓慢地旋转，如下所示： ```swift ScrollView(.horizontal, showsIndicators: false) { HStack(spacing: 0) { ForEach(1..<20) { num in VStack { GeometryReader { geo in Text("Number \(num)") .font(.largeTitle) .padding() .background(Color.red) .rotation3DEffect(.degrees(-Double(geo.frame(in: .global).minX) / 8), axis: (x: 0, y: 1, z: 0)) .frame(width: 200, height: 200) } .frame(width: 200, height: 200) } } } } ``` 您不必总是使用 `GeometryReader` 来获得有趣的效果，例如，可以使用 `DragGesture()` 进行类似的处理。 因此，此代码创建了一个可以在 `X` 和 `Y` 轴上拖动的类似于卡片的矩形，并使用了两个 `rotation3DEffect()` 修饰符从该拖动中应用值： ```swift struct ContentView: View { @State var dragAmount = CGSize.zero var body: some View { VStack { Rectangle() .fill(LinearGradient(gradient: Gradient(colors: [.yellow, .red]), startPoint: .topLeading, endPoint: .bottomTrailing)) .frame(width: 200, height: 150) .clipShape(RoundedRectangle(cornerRadius: 20)) .rotation3DEffect(.degrees(-Double(dragAmount.width) / 20), axis: (x: 0, y: 1, z: 0)) .rotation3DEffect(.degrees(Double(dragAmount.height / 20)), axis: (x: 1, y: 0, z: 0)) .offset(dragAmount) .gesture( DragGesture() .onChanged { dragAmount = $0.translation } .onEnded { _ in withAnimation(.spring()) { dragAmount = .zero } } ) } .frame(width: 400, height: 400) } } 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init(rows: Int, columns: Int, @ViewBuilder content: @escaping (Int, Int) -> Content) { self.rows = rows self.columns = columns self.content = content } } // An example view putting GridStack into practice. struct ContentView: View { var body: some View { GridStack(rows: 4, columns: 4) { row, col in Image(systemName: "\(row * 4 + col).circle") Text("R\(row) C\(col)") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/stacks-grids-scrollviews/demo12/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/18. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/stacks-grids-scrollviews/demo12/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion 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$(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/stacks-grids-scrollviews/demo12/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo12/README.md ================================================ 如何使用 `LazyVGrid` 和 `LazyHGrid` 在网格中放置视图？ === SwiftUI 的 `LazyVGrid` 和 `LazyHGrid` 为我们提供了相当多的灵活性的网格布局。 最简单的网格由三部分组成：原始数据，描述所需布局的 `GridItem` 数组以及将数据和布局组合在一起的 `LazyVGrid` 或 `LazyHGrid`。 例如，这将使用大小为80点的像元创建垂直网格布局： ```swift struct ContentView: View { let data = (1...100).map { "Item \($0)" } let columns = [ GridItem(.adaptive(minimum: 80)) ] var body: some View { ScrollView { LazyVGrid(columns: columns, spacing: 20) { ForEach(data, id: \.self) { item in Text(item) } } .padding(.horizontal) } .frame(maxHeight: 300) } } ``` 使用 `GridItem(.adaptive(minimum：80)` 意味着我们希望网格可以容纳每行尽可能多的项目，每个网格的最小大小为 `80`点。 如果要控制列数，可以改用 `.flexible()`，它还可以让您指定每个项目的大小，但现在可以控制有多少列。 例如，这将创建五列： ```swift struct ContentView: View { let data = (1...100).map { "Item \($0)" } let columns = [ GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible()) ] var body: some View { ScrollView { LazyVGrid(columns: columns, spacing: 20) { ForEach(data, id: \.self) { item in Text(item) } } .padding(.horizontal) } .frame(maxHeight: 300) } } ``` 第三种选择是使用固定大小。 例如，这将使第一列的宽度恰好为 `100` 点，并允许第二列填充所有剩余空间： ```swift struct ContentView: View { let data = (1...100).map { "Item \($0)" } let columns = [ GridItem(.fixed(100)), GridItem(.flexible()), ] var body: some View { ScrollView { LazyVGrid(columns: columns, spacing: 20) { ForEach(data, id: \.self) { item in Text(item) } } .padding(.horizontal) } .frame(maxHeight: 300) } } ``` 您还可以使用 `LazyHGrid` 制作水平滚动的网格，除了在初始化程序中接受行之外，其工作方式几乎相同。 例如，我们可以创建 `10` 个并排的标题图像，它们像这样水平滚动： ```swift struct ContentView: View { let items = 1...50 let rows = [ GridItem(.fixed(50)), GridItem(.fixed(50)) ] var body: some View { ScrollView(.horizontal) { LazyHGrid(rows: rows, alignment: .center) { ForEach(items, id: \.self) { item in Image(systemName: "\(item).circle.fill") .font(.largeTitle) } } .frame(height: 150) } } } ``` 如您所见，创建水平和垂直网格所需的代码几乎相同，仅更改了 `columns` 的 `rows`。 如果需要支持 `iOS 13`，则您将无权访问 `LazyHGrid` 或 `LazyVGrid`，因此请阅读以下内容以了解其他方法... SwiftUI 为我们提供了用于垂直布局的 `VStack` 和用于水平布局的 `HStack`，但没有做到这两者–没有可以在网格结构中布局视图的东西。 幸运的是，我们可以利用 SwiftUI 的视图生成器系统来编写自己的代码。 这意味着编写必须使用行数和列数以及必须运行的闭包才能检索网格中给定单元格的视图的类型。 然后，可以在主体内部遍历所有行和列，并在 `VStack` 和 `HStack` 内部创建单元格以形成网格，每次调用视图关闭以询问单元格中应包含的内容。 在代码中，它看起来像这样： ```swift struct GridStack: View { let rows: Int let columns: Int let content: (Int, Int) -> Content var body: some View { VStack { ForEach(0 ..< rows, id: \.self) { row in HStack { ForEach(0 ..< columns, id: \.self) { column in content(row, column) } } } } } init(rows: Int, columns: Int, @ViewBuilder content: @escaping (Int, Int) -> Content) { self.rows = rows self.columns = columns self.content = content } } // An example view putting GridStack into practice. struct ContentView: View { var body: some View { GridStack(rows: 4, columns: 4) { row, col in Image(systemName: "\(row * 4 + col).circle") Text("R\(row) C\(col)") } } } ``` 这将创建一个 `4x4` 网格，每个单元格中均包含图像和文本。 ================================================ FILE: 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PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/stacks-grids-scrollviews/demo13/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/18. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/stacks-grids-scrollviews/demo13/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/stacks-grids-scrollviews/demo13/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/stacks-grids-scrollviews/demo13/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo13/README.md ================================================ 如何使用 `LazyVStack` 和 `LazyHStack` 延迟加载视图？ === 默认情况下，SwiftUI的VStack和HStack会预先加载其所有内容，如果在滚动视图中使用它们，可能会很慢。 如果您要延迟加载内容（即，仅当内容滚动到视图中时），则应适当使用LazyVStack和LazyHStack。 ```swift struct ContentView: View { var body: some View { ScrollView { LazyVStack { ForEach(1...100, id: \.self) { value in Text("Row \(value)") } } } .frame(height: 300) } } ``` ⚠️ 警告：这些惰性堆栈自动具有灵活的首选宽度，因此它们将以常规堆栈不会占用的方式占用可用空间。 要查看它们之间的区别，请尝试上面的代码，您会发现可以使用文本周围的空白来拖拉，但是如果您切换到常规 `VStack`，则会看到需要使用文本本身进行滚动。 使用惰性堆栈时，`SwiftUI`将在首次显示时自动创建视图。 之后，视图将保留在内存中，因此请注意显示的内容。 如果您想了解延迟加载的工作原理，请在iOS应用中尝试以下示例： ```swift struct SampleRow: View { let id: Int var body: some View { Text("Row \(id)") } init(id: Int) { print("Loading row \(id)") self.id = id } } struct ContentView: View { var body: some View { ScrollView { LazyVStack { ForEach(1...100, id: \.self, content: SampleRow.init) } } .frame(height: 300) } } ``` 如果您在 Xcode 中运行该代码，则在滚动时会看到 `Loading row…`（正在加载行…）消息在控制台中打印出来。 ================================================ FILE: example/stacks-grids-scrollviews/demo14/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D76A21B26115E9F00D94570 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D76A20826115E9F00D94570 /* DemoApp.swift */; }; 7D76A21C26115E9F00D94570 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D76A20826115E9F00D94570 /* DemoApp.swift */; }; 7D76A21D26115E9F00D94570 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D76A20926115E9F00D94570 /* ContentView.swift */; }; 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ContentView.swift // Shared // // Created by 王楚江 on 2021/3/29. // import SwiftUI struct ContentView: View { var body: some View { GeometryReader{geometry in HSplitView(){ Rectangle() .frame(minWidth: 0, idealWidth: 200, maxWidth: .infinity) HSplitView(){ Rectangle().layoutPriority(1) Rectangle().foregroundColor(.green).frame(minWidth:200, idealWidth: 200, maxWidth: .infinity) }.layoutPriority(1) } .frame(width: geometry.size.width, height: geometry.size.height) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/stacks-grids-scrollviews/demo14/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/29. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: 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example/stacks-grids-scrollviews/demo14/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/stacks-grids-scrollviews/demo14/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo14/README.md ================================================ 如何使用 `HSplitViews` 创建左中右三栏布局？ === 使用 `HSplitViews` 布局容器，将其子级排列在一条水平线上，并允许用户使用放置在它们之间的分隔符来调整它们的大小。 ![](imgs/1.png) ```swift struct ContentView: View { var body: some View { GeometryReader{geometry in HSplitView(){ Rectangle() .frame(minWidth: 0, idealWidth: 200, maxWidth: .infinity) HSplitView(){ Rectangle().layoutPriority(1) Rectangle().foregroundColor(.green).frame(minWidth:200, idealWidth: 200, maxWidth: .infinity) }.layoutPriority(1) } .frame(width: geometry.size.width, height: geometry.size.height) } } } ``` ================================================ FILE: example/stacks-grids-scrollviews/demo15/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 55; objects = { /* Begin PBXBuildFile section */ 7D3540B42720501F002D62E6 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3540A42720501D002D62E6 /* DemoApp.swift */; }; 7D3540B52720501F002D62E6 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3540A42720501D002D62E6 /* DemoApp.swift */; }; 7D3540B62720501F002D62E6 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================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", 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================================================ FILE: example/stacks-grids-scrollviews/demo15/Demo/Shared/Assets.xcassets/singapore.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "001.jpg", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo15/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { var body: some View { ZStack { Image("singapore") if #available(iOS 15.0, *) { Text("Visit Singapore") .padding() .background(.thinMaterial) } else { // Fallback on earlier versions } } ZStack { Image("singapore") if #available(iOS 15.0, *) { Text("Visit Singapore") .foregroundColor(.secondary) .padding() .background(.ultraThinMaterial) } else { // Fallback on earlier versions } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/stacks-grids-scrollviews/demo15/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/stacks-grids-scrollviews/demo15/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo15/README.md ================================================ 如何添加视觉效果模糊？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) `SwiftUI` 有一个非常简单的 `UIVisualEffectView` 等效项，它结合了 `ZStack`、`background()` 修饰符和一系列内置材料。 例如，这会在图像上放置一些文本，对文本应用标准模糊效果： ```swift ZStack { Image("singapore") Text("Visit Singapore") .padding() .background(.thinMaterial) } ``` ![](./imgs/001.png) 您可以使用多种材质类型中的一种来调整材质的“厚度”——背景内容有多少透过。 从最薄到最厚，它们是： - `.ultraThinMaterial` - `.thinMaterial` - `.regularMaterial` - `.thickMaterial` - `.ultraThickMaterial` 如果您使用辅助前景色，`SwiftUI` 会自动调整文本颜色，使其具有鲜明的效果并能从背景中脱颖而出： ```swift ZStack { Image("singapore") Text("Visit Singapore") .foregroundColor(.secondary) .padding() .background(.ultraThinMaterial) } ``` ![](./imgs/002.png) ================================================ FILE: 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"size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo2/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo2/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { VStack(spacing: 50) { Text("SwiftUI") Text("rocks") } VStack { Text("SwiftUI") Divider() Text("rocks") } VStack(alignment: .leading) { Text("SwiftUI") Text("rocks") } VStack(alignment: .leading, spacing: 20) { Text("SwiftUI") Text("rocks") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } 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================================================ ================================================ FILE: example/stacks-grids-scrollviews/demo2/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/stacks-grids-scrollviews/demo2/README.md ================================================ 如何使用对齐和间距自定义堆栈布局？ === 您可以通过在初始化程序中提供一个值来在 `SwiftUI` 堆栈内添加 `spacing`，如下所示： ```swift VStack(spacing: 50) { Text("SwiftUI") Text("rocks") } ``` 另外，您可以在项目之间创建分隔线，以便 `SwiftUI` 在堆栈中的每个项目之间进行小的视觉区分，如下所示： ```swift VStack { Text("SwiftUI") Divider() Text("rocks") } ``` 默认情况下，堆栈中的项目在中心对齐。 对于 `HStack`，这意味着项目在中间垂直对齐，因此，如果您有两个高度不同的文本视图，则它们都将在其垂直中心对齐。 对于 `VStack`，这意味着项目在中间居中对齐，因此，如果您有两个不同长度的文本视图，则它们都将与其水平中心对齐。 要对此进行调整，请在创建堆栈时传递对齐方式，如下所示： ```swift VStack(alignment: .leading) { Text("SwiftUI") Text("rocks") } ``` 这样会将 `SwiftUI` 和 `rocks` 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FILE: example/stacks-grids-scrollviews/demo3/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/stacks-grids-scrollviews/demo3/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/stacks-grids-scrollviews/demo3/README.md ================================================ 如何使用 `Spacer` 将视图强制移到堆栈中的一侧？ === `SwiftUI` 默认情况下将其视图居中，这意味着如果在 `VStack` 中放置三个文本视图，则这三个视图将在屏幕上垂直居中。 如果要更改此设置（如果要强制视图朝屏幕的顶部，底部，左侧或右侧），则应使用 `Spacer` 视图。 例如，这会将一个文本视图放置在 `VStack` 内，这意味着它将垂直居中： ```swift VStack { Text("Hello World") } ``` 要将文本视图推到父视图的顶部，我们需要在其下方放置一个空格，如下所示： ```swift VStack { Text("Hello World") Spacer() } ``` 如果您希望在 `HStack` 的前端和后端有两段文字，可以使用这样的间隔符： ```swift HStack { Text("Hello") Spacer() Text("World") } ``` `Spacers` 会自动划分所有剩余空间，这意味着如果您使用多个垫片，则可以按不同数量划分空间。 例如，这将通过在其上放置一个空格，在其后放置两个空格，将文本视图放置在其父视图的三分之一以下： ```swift VStack { Spacer() Text("Hello World") Spacer() Spacer() } ``` ================================================ FILE: example/stacks-grids-scrollviews/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo4/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo4/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/stacks-grids-scrollviews/demo4/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { VStack { Text("First Label") Spacer() .frame(height: 50) Text("Second Label") } VStack { Text("First Label") Spacer(minLength: 50) Text("Second Label") } } } struct 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FILE: example/stacks-grids-scrollviews/demo4/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/stacks-grids-scrollviews/demo4/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/stacks-grids-scrollviews/demo4/README.md ================================================ 如何制作固定尺寸的 `Spacer`？ === `SwiftUI` 的 `Spacer` 视图会自动填充其扩展轴上的所有可用空间，这是一种奇特的说法，即根据您放置的内容，它们在水平或垂直方向上会占用尽可能多的空间。 如果要制作一个精确大小的间隔物，只需执行与其他视图相同的操作即可：使用具有您想要的精确大小的 `frame()` 修饰符。 例如，这显示了两个文本视图，它们之间有一个 `50` 点的空格： ```swift VStack { Text("First Label") Spacer() .frame(height: 50) Text("Second Label") } ``` 如果给定间隔符一个值的范围，例如使用 `.frame(minHeight:50，maxHeight:500)`，则它将自动占用尽可能多的空间，直到您设置的最大值。 通常，以这种方式添加一些灵活性是一个好主意，这样您的用户界面就可以更轻松地跨设备扩展。 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================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/stacks-grids-scrollviews/demo5/README.md ================================================ 如何使用 `ZStack` 在彼此之上叠加视图？ === `SwiftUI` 具有用于创建重叠内容的专用堆栈类型，例如，如果您想在图片上放置一些文本，则很有用。 它称为 `ZStack` ，其工作方式与其他两种堆栈类型相同。 例如，我们可以在一些文本下方放置一个大图像，如下所示： ```swift ZStack { Image("niagara-falls") Text("Hacking with Swift") .font(.largeTitle) .background(Color.black) .foregroundColor(.white) } ``` 像其他堆栈类型一样，`ZStack` 可以通过对齐方式创建，这样它就不会始终将其内部居中放置： ```swift ZStack(alignment: .leading) { Image("niagara-falls") Text("Hacking with Swift") .font(.largeTitle) .background(Color.black) .foregroundColor(.white) } ``` 但是，它没有间距属性，因为它没有意义。 相反，您应该使用 `offset()` 修饰符，[如如何使用其偏移量调整视图的位置中所示](../../transforming-views/demo1/README.md)。 ================================================ FILE: example/stacks-grids-scrollviews/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json 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example/stacks-grids-scrollviews/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/stacks-grids-scrollviews/demo6/README.md ================================================ 如何使用 `zIndex` 更改视图分层的顺序？ === 默认情况下，`SwiftUI` 的 `ZStack` 使用绘画者的算法来确定视图的深度，以决定视图的深度：首先绘制到 `ZStack` 中的所有内容都会被首先绘制，然后在其上分层放置随后的视图。 尽管这通常是您想要的，但有时您需要更多的控制权-例如，您可能希望在应用运行时将一个视图推到另一个视图的后面，或者在点击某个视图时将其移到最前面。 为此，您需要使用 `zIndex()` 修饰符，该修饰符允许您确切指定视图如何在单个 `ZStack` 中分层。 视图的默认Z索引为0，但是您可以提供正值或负值，分别将它们放置在其他视图的上方或下方。 例如，此 `ZStack` 包含两个重叠的矩形，但是绿色矩形仍然可见，因为它使用的 `Z` 索引值为 `1`： ```swift ZStack { Rectangle() .fill(Color.green) .frame(width: 50, height: 50) .zIndex(1) Rectangle() .fill(Color.red) .frame(width: 100, height: 100) } ``` ⚠️ 注意：`zIndex()` 修饰符仅影响当前 `ZStack` 内的绘制顺序。 这意味着，如果您有两个重叠的堆栈，则需要考虑堆栈的 `Z` 索引以及堆栈内部的视图。 ================================================ 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UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/stacks-grids-scrollviews/demo7/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/stacks-grids-scrollviews/demo7/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo7/README.md ================================================ 如何使用尺寸类创建不同的布局？ === SwiftUI 通过将大小型暴露在环境中供我们阅读来原生支持大小类。 要使用它们，首先创建一个 `@Environment` 对象，该对象将存储其值，然后在需要时检查该属性的值，查找 `.compact` 或 `.regular` 尺寸类。 例如： ```swift struct ContentView: View { #if !os(macOS) @Environment(\.horizontalSizeClass) var horizontalSizeClass #endif var body: some View { #if !os(macOS) if horizontalSizeClass == .compact { Text("Compact") } else { Text("Regular") } #else Text("Regular2") #endif } } ``` 上面示例在 iPhone 中显示 `Compact` 在 iPad 中显示 `Regular`，在 macOS 中显示 `Regular2` `Size` 类是通过将 `VStack` 或 `HStack` 用于内容来使用户界面智能地适应可用空间的好方法。例如，如果您有很多空间，则可以将事物水平放置，但在空间有限时切换为垂直布局。 ⚠️ 注意： `horizontalSizeClass` 只适用于 iOS 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example/stacks-grids-scrollviews/demo8/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/18. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/stacks-grids-scrollviews/demo8/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait 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com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo8/README.md ================================================ 如何根据大小类在 `HStack` 和 `VStack` 之间自动切换？ === SwiftUI 使我们可以监视当前的大小类，以决定事物的布局方式，例如从空间充足时的 `HStack` 切换到空间受限时的 `VStack`。 稍加思考，我们就可以编写一个新的 `AdaptiveStack` 视图，该视图为我们自动在水平和垂直布局之间切换。 这使在 `iPad` 上创建出色的布局变得更加简单，因为我们的布局将自动调整以适应拆分视图和过渡方案。 外观如下： ```swift struct AdaptiveStack: View { #if !os(macOS) @Environment(\.horizontalSizeClass) var sizeClass #endif let horizontalAlignment: HorizontalAlignment let verticalAlignment: VerticalAlignment let spacing: CGFloat? let content: () -> Content init(horizontalAlignment: HorizontalAlignment = .center, verticalAlignment: VerticalAlignment = .center, spacing: CGFloat? = nil, @ViewBuilder content: @escaping () -> Content) { self.horizontalAlignment = horizontalAlignment self.verticalAlignment = verticalAlignment self.spacing = spacing self.content = content } var body: some View { Group { #if !os(macOS) if sizeClass == .compact { VStack(alignment: horizontalAlignment, spacing: spacing, content: content) } else { HStack(alignment: verticalAlignment, spacing: spacing, content: content) } #else HStack(alignment: verticalAlignment, spacing: spacing, content: content) #endif } } } struct ContentView: View { var body: some View { AdaptiveStack { Text("Horizontal when there's lots of space") Text("but") Text("Vertical when space is restricted") } } } ``` 要进行尝试，请在 `iPad` 模拟器中运行该应用程序，然后尝试使用不同大小的拆分视图-您会看到 `ContentView` 在空间不足时会自动切换到 `VStack`。 现在解释自定义视图的工作原理： - 它监视 `horizontalSizeClass` 环境键，以便每次尺寸类更改时都会对其进行更新。 - 我们为它提供了分别存储水平和垂直对齐方式的参数，因此您可以精确控制布局的调整方式。 - 有一个可选的 `CGFloat` 用于间距，因为这正是 `VStack` 和 `HStack` 所使用的。 如果您希望获得更多控制，则可以添加 `horizontalSpacing` 和 `verticalSpacing` 属性。 - `content` 属性是一个不接受任何参数并返回某种内容的函数，最终用户将依靠该视图构建器来创建其布局。 - 我们的初始化程序将它们全部藏起来以备后用。 - 在 `body` 属性内，我们可以读取水平尺寸类，然后在 `VStack` 或 `HStack` 中包装对 `content()` 的调用。 就是这样！ 实际的代码并不像您想象的那么难，但是它为我们提供了一些非常有用的灵活性。 ================================================ FILE: example/stacks-grids-scrollviews/demo9/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.network.client ================================================ FILE: example/stacks-grids-scrollviews/demo9/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D793586260329CD00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793573260329CC00A87448 /* DemoApp.swift */; }; 7D793587260329CD00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793573260329CC00A87448 /* DemoApp.swift */; }; 7D793588260329CD00A87448 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793574260329CC00A87448 /* ContentView.swift */; }; 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.foregroundColor(.white) .font(.largeTitle) .frame(width: 200, height: 200) .background(Color.red) } } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/stacks-grids-scrollviews/demo9/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/18. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/stacks-grids-scrollviews/demo9/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/stacks-grids-scrollviews/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/stacks-grids-scrollviews/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/stacks-grids-scrollviews/demo9/README.md ================================================ 如何使用 `ScrollView` 添加水平和垂直滚动？ === SwiftUI 的 `ScrollView` 允许我们相对轻松地创建视图的滚动容器，因为它会自动调整自身大小以适合我们放置在其中的内容，并且还会自动添加额外的插图以避免出现安全区域。 例如，我们可以创建一个包含十个文本视图的滚动列表，如下所示： ```swift ScrollView { VStack(spacing: 20) { ForEach(0..<10) { Text("Item \($0)") .foregroundColor(.white) .font(.largeTitle) .frame(width: 200, height: 200) .background(Color.red) } } } .frame(height: 350) ``` 滚动视图默认情况下是垂直的，但是您可以通过传入 `.horizontal` 作为第一个参数来控制轴。 因此，我们可以将前面的示例翻转为水平，如下所示： ```swift ScrollView(.horizontal) { HStack(spacing: 20) { ForEach(0..<10) { Text("Item \($0)") .foregroundColor(.white) .font(.largeTitle) .frame(width: 200, height: 200) .background(Color.red) } } } ``` 您可以使用 `[.horizontal，.vertical]` 同时指定两个轴。 最后，您可以决定是否在滚动动作发生时显示滚动指示器，如下所示： ```swift ScrollView(.horizontal, showsIndicators: false) { HStack(spacing: 20) { ForEach(0..<10) { Text("Item \($0)") .foregroundColor(.white) .font(.largeTitle) .frame(width: 200, height: 200) .background(Color.red) } } } ``` ================================================ FILE: example/taps-and-gestures/demo1/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DB7F80B260B02EE008F3D92 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F7F8260B02EC008F3D92 /* DemoApp.swift */; }; 7DB7F80C260B02EE008F3D92 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7DB7F7F8260B02EC008F3D92 /* DemoApp.swift */; }; 7DB7F80D260B02EE008F3D92 /* 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================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "avatar.png", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/taps-and-gestures/demo1/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { @State private var dragOffset = CGSize.zero var body: some View { VStack { Image("ireland") .offset(dragOffset) .gesture( DragGesture() .onChanged { gesture in dragOffset = gesture.translation } .onEnded { gesture in dragOffset = .zero } ) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/taps-and-gestures/demo1/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/taps-and-gestures/demo1/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait 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com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo1/README.md ================================================ 如何在视图中添加手势识别器？ === 任何 `SwiftUI` 视图都可以连接手势识别器，而这些手势识别器又可以连接将在识别器激活时运行的闭包。 有几个手势识别器可以使用，我将为您提供其中几个的代码示例，以帮助您入门 - 您将看到它们的相似之处。 首先是 `TapGesture`。 创建此对象时，您可以指定触发手势所需的轻击次数，然后附加一个 `onEnded` 闭合，该闭合将在手势发生时运行。 例如，这样创建的图像每次被点击都会变小： ```swift struct ContentView: View { @State private var scale: CGFloat = 1.0 var body: some View { Image("ireland") .scaleEffect(scale) .gesture( TapGesture() .onEnded { _ in scale -= 0.1 } ) } } ``` 其次，`LongPressGesture` 可以识别用户何时按下并按住视图至少指定的时间。 因此，这样创建的图像视图在按下至少一秒钟时会减小一半： ```swift struct ContentView: View { @State private var scale: CGFloat = 1.0 var body: some View { Image("cornwall") .scaleEffect(scale) .gesture( LongPressGesture(minimumDuration: 1) .onEnded { _ in scale /= 2 } ) } } ``` 最后，当用户在视图上按下并移动至少一定距离时，`DragGesture` 将触发。 因此，这将创建具有拖动手势的图像，当用户将其移动至少50点时将触发该图像： ```swift struct ContentView: View { @State private var dragCompleted = false var body: some View { VStack { Image("iceland") .gesture( DragGesture(minimumDistance: 50) .onEnded { _ in dragCompleted = true } ) if dragCompleted { Text("Drag completed!") } } } } ``` 与 `offset()` 修饰符结合使用时，拖动手势特别好，它可以让我们调整视图的自然位置。 例如，这使用 `dragOffset` 大小来偏移图像，该大小本身附加到拖动手势： ```swift struct ContentView: View { @State private var dragOffset = CGSize.zero var body: some View { VStack { Image("rome") .offset(dragOffset) .gesture( DragGesture() .onChanged { gesture in dragOffset = gesture.translation } .onEnded { gesture in dragOffset = .zero } ) } } } ``` 如果您尝试使用该代码，则会看到可以立即拖动图像，并且在松开手指时，它将捕捉回到原始位置。 ================================================ FILE: example/taps-and-gestures/demo2/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DB7F834260B049C008F3D92 /* 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example/taps-and-gestures/demo2/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/taps-and-gestures/demo2/Demo/Shared/Assets.xcassets/singapore.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "avatar.png", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/taps-and-gestures/demo2/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello, world!") .padding() .onTapGesture { print("Tapped!") } Image("singapore") 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UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/taps-and-gestures/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/taps-and-gestures/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo2/README.md ================================================ 如何阅读点击和双击手势？ === 任何 SwiftUI 视图都可以附加轻击操作，并且您可以指定触发该操作之前应接收的轻击次数。 例如，这将创建一个文本视图，在点击该文本视图时将显示一条消息： ```swift Text("Tap me!") .onTapGesture { print("Tapped!") } ``` 这将创建一个图像视图，该图像视图在双击时会显示一条消息： ```swift Image("singapore") .onTapGesture(count: 2) { print("Double tapped!") } ``` ================================================ FILE: example/taps-and-gestures/demo3/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7DB7F85D260B166B008F3D92 /* DemoApp.swift in 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/taps-and-gestures/demo3/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { VStack { Circle() .fill(Color.red) .frame(width: 200, height: 200) .onTapGesture { print("Circle tapped") } } .highPriorityGesture( TapGesture() .onEnded { _ in print("VStack tapped") } ) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/taps-and-gestures/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/taps-and-gestures/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/taps-and-gestures/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/taps-and-gestures/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo3/README.md ================================================ 如何使用 `highPriorityGesture()` 强制一个手势先识别另一个手势？ === 如果您在另一个视图中有一个 `SwiftUI` 视图，并且两个视图都具有相同的手势识别器，则系统将始终在父级之前在子级上触发识别器。 您可以使用 `highPriorityGesture()` 更改此行为，这将强制系统将一个手势优先于另一个手势。 例如，我们可以编写一些代码在 `VStack` 中放置一个圆圈，从而提供一个简单的轻击手势动作。 在这种情况下，圈子的手势动作将始终被触发： ```swift struct ContentView: View { var body: some View { VStack { Circle() .fill(Color.red) .frame(width: 200, height: 200) .onTapGesture { print("Circle tapped") } } .onTapGesture { print("VStack tapped") } } } ``` 如果要触发 `VStack` 手势代替圆的手势，则需要使用 `highPriorityGesture()` 替换 `onTapGesture()` 修饰符，如下所示： ```swift struct ContentView: View { var body: some View { VStack { Circle() .fill(Color.red) .frame(width: 200, height: 200) .onTapGesture { print("Circle tapped") } } .highPriorityGesture( TapGesture() .onEnded { _ in print("VStack tapped") } ) } } ``` 使用此替代方法时，将始终打印 `VStack tapped`，因为 `VStack` 识别器将始终优先于圈子的优先级。 ================================================ FILE: example/taps-and-gestures/demo4/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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example/taps-and-gestures/demo4/README.md ================================================ 如何使用 `simultaneousGesture()` 同时识别两个手势？ === 默认情况下，`SwiftUI` 一次只会触发一个手势识别器动作，通常是您层次结构中最前面的视图中的任何一个 - 例如，它倾向于在子视图而不是其父视图上使用识别器。 如果要覆盖此行为以一次触发两个手势，则在创建第二个手势和后续手势时应使用 `sameGesture()`。 例如，在这段代码中，我们有两个轻击手势，但是 `SwiftUI` 仅执行附加到圆圈上的一个手势，因为它是 `VStack` 的子代： ```swift struct ContentView: View { var body: some View { VStack { Circle() .fill(Color.red) .frame(width: 200, height: 200) .onTapGesture { print("Circle tapped") } } .onTapGesture { print("VStack tapped") } } } ``` 如果要同时触发两个手势（即，如果要同时打印 `Circle tapped` 和 `VStack tapped`），则应在 `VStack` 上同时使用 `Gesture()`，如下所示： ```swift struct ContentView: View { var body: some View { VStack { Circle() .fill(Color.red) .frame(width: 200, height: 200) .onTapGesture { print("Circle tapped") } } .simultaneousGesture( TapGesture() .onEnded { _ in print("VStack tapped") } ) } } ``` 注意：您应该将 `simultaneousGesture()` 与不会执行的手势一起使用，否则它将无法正常工作。 因此，在我们之前的示例中，同时使用带有圆圈的并发 `Gesture()` 和带有 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drag me" } let drag = DragGesture() .onEnded { _ in message = "Success!" } let combined = longPress.sequenced(before: drag) Text(message) .gesture(combined) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/taps-and-gestures/demo5/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/taps-and-gestures/demo5/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/taps-and-gestures/demo5/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/taps-and-gestures/demo5/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo5/README.md ================================================ 如何使用 `sequenced(before:)` 创建手势链？ === SwiftUI 允许我们从其他手势序列中创建新手势，这使我们仅在两个手势背靠背出现时才触发动作-例如，如果用户拖动视图然后在其上长按。 由于排序后的视图需要能够相互引用，因此您无法真正将它们创建为视图的属性。 而是直接在您的body属性内创建它们，然后使用 `firstGesture.sequenced(before: secondGesture)` 将两者链接在一起成为一个手势。 例如，下面的代码要求您长按文本视图，然后再拖动它： ```swift struct ContentView: View { @State private var message = "Long press then drag" var body: some View { let longPress = LongPressGesture() .onEnded { _ in message = "Now drag me" } let drag = DragGesture() .onEnded { _ in message = "Success!" } let combined = longPress.sequenced(before: drag) Text(message) .gesture(combined) } } ``` 如您所见，当两个手势同时发生时，我已使文本视图更新，因此，如果您尝试一下，便可以跟踪手势序列的进度。 ================================================ FILE: example/taps-and-gestures/demo6/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D5F66D0260B1D1200E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F66BD260B1D1100E964BB /* DemoApp.swift */; }; 7D5F66D1260B1D1200E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F66BD260B1D1100E964BB /* DemoApp.swift */; }; 7D5F66D2260B1D1200E964BB /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F66BE260B1D1100E964BB /* ContentView.swift */; }; 7D5F66D3260B1D1200E964BB /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F66BE260B1D1100E964BB /* ContentView.swift */; }; 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UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/taps-and-gestures/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/taps-and-gestures/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo6/README.md ================================================ 如何检测到用户将鼠标悬停在视图上？ === 在 `SwiftUI` 中，任何连接了鼠标的 `macOS` 应用程序或任何 `iPadOS` 应用程序都可以检测到用户何时将其鼠标悬停在视图上，并做出适当的响应。 您将要使用两个修饰符：`onHover()` 和 `hoverEffect()`。 这些中的第一个允许您跟踪指针当前是否悬停在视图上方，并传递一个反映该状态的布尔值。 例如，根据指针是否悬停在文本上方，这将使某些文本变为红色或绿色： ```swift struct ContentView: View { @State private var overText = false var body: some View { Text("Hello, World!") .foregroundColor(overText ? .green : .red) .onHover { over in overText = over } } } ``` `hoverEffect()` 修饰符允许您选择以下三种方式之一：系统在发生悬停时突出显示视图：`.highlight` 将指针转换为视图形状，同时创建柔和的方向效果，`.lift` 将指针转换为形状 同时放大视图并在其后放置柔和阴影，`.automatic` 会选择它认为最合适的突出显示效果。 请注意，如果仅应用不带任何参数的 `hoverEffect()` 修饰符，则 `.automatic` 是默认设置，但它不仅仅是在 `.highlight` 和 `.lift` 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2021/3/24. // import SwiftUI // 发生摇动手势时我们将发送的通知。 extension UIDevice { static let deviceDidShakeNotification = Notification.Name(rawValue: "deviceDidShakeNotification") } // 覆盖摇动手势的默认行为，改为发送我们的通知。 extension UIWindow { open override func motionEnded(_ motion: UIEvent.EventSubtype, with event: UIEvent?) { if motion == .motionShake { NotificationCenter.default.post(name: UIDevice.deviceDidShakeNotification, object: nil) } } } // 一个视图修改器，它检测到晃动并调用我们选择的功能。 struct DeviceShakeViewModifier: ViewModifier { let action: () -> Void func body(content: Content) -> some View { content .onAppear() .onReceive(NotificationCenter.default.publisher(for: UIDevice.deviceDidShakeNotification)) { _ in action() } } } // 一个View扩展，使修改器更易于使用。 extension View { func onShake(perform action: @escaping () -> Void) -> some View { self.modifier(DeviceShakeViewModifier(action: action)) } } // 响应晃动的示例视图 struct ContentView: View { var body: some View { Text("Shake me!") .onShake { print("Device shaken!") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/taps-and-gestures/demo7/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/taps-and-gestures/demo7/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/taps-and-gestures/demo7/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/taps-and-gestures/demo7/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo7/README.md ================================================ 如何检测摇动手势？ === SwiftUI 没有内置的方法来检测用户在摇晃设备，但是通过覆盖 `UIWindow` 中的 `motionEnded()` 并创建自定义视图修饰符来创建自己的代码并不需要太多工作。 这需要五个步骤： - 向 `UIDevice` 添加扩展以跟踪将在发生摇动手势时发送的新通知。 - 在 `UIWindow` 上创建扩展，以覆盖默认的 `motionEnded()` 方法。`UIKit` 在此处发送摇动手势，因此您应该查找发生的情况并将其转换为新的通知。 - 创建一个自定义视图修改器以监视要发布的摇动通知，并在发生时调用您选择的函数。 - 创建一个View扩展，将新修饰符整齐地包裹起来。 - 在视图中尝试一下。 重要说明：在编写视图时，除非先添加 `onAppear()`，否则视图修饰符不能与 `onReceive()` 一起使用，这就是它出现在上方的原因。是的，它是空的，但是可以解决此问题。 这是一个完整的代码示例，它通过注释逐步说明了所有五个步骤： ```swift // 发生摇动手势时我们将发送的通知。 extension UIDevice { static let deviceDidShakeNotification = Notification.Name(rawValue: "deviceDidShakeNotification") } // 覆盖摇动手势的默认行为，改为发送我们的通知。 extension UIWindow { open override func motionEnded(_ motion: UIEvent.EventSubtype, with event: UIEvent?) { if motion == .motionShake { NotificationCenter.default.post(name: UIDevice.deviceDidShakeNotification, object: nil) } } } // 一个视图修改器，它检测到晃动并调用我们选择的功能。 struct DeviceShakeViewModifier: ViewModifier { let action: () -> Void func body(content: Content) -> some View { content .onAppear() .onReceive(NotificationCenter.default.publisher(for: UIDevice.deviceDidShakeNotification)) { _ in action() } } } // 一个View扩展，使修改器更易于使用。 extension View { func onShake(perform action: @escaping () -> Void) -> some View { self.modifier(DeviceShakeViewModifier(action: action)) } } // 响应晃动的示例视图 struct ContentView: View { var body: some View { Text("Shake me!") .onShake { print("Device shaken!") } } } ``` 如您所见，完成前四个步骤后，就可以继续向任何所需的视图添加 `onShake()` 修饰符，从而提供一些自定义代码以在发生摇动手势时运行–设置起来并不容易， 但是一旦完成，一切都可以很好地进行。 ================================================ FILE: example/taps-and-gestures/demo8/Demo/Demo.xcodeproj/project.pbxproj 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"idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/taps-and-gestures/demo8/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/taps-and-gestures/demo8/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { VStack { Image(systemName: "person.circle").resizable().frame(width: 50, height: 50) Spacer().frame(height: 50) Text("Paul Hudson") } .contentShape(Rectangle()) .onTapGesture { print("Show details for user") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/taps-and-gestures/demo8/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/taps-and-gestures/demo8/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/taps-and-gestures/demo8/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/taps-and-gestures/demo8/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo8/README.md ================================================ 如何使用 `contentShape()` 控制视图的可点击区域？ === 如果您向原始的 `SwiftUI` 视图（如 `Text` 或 `Image`）添加轻击手势，则整个视图将变为可轻敲的。 如果将轻击手势添加到容器SwiftUI视图（例如 `VStack` 或 `HStack`），则 `SwiftUI` 只会将手势添加到容器内部具有某些内容的部分–堆栈的大部分很可能无法应用。 如果这是您想要的，那么默认行为就可以了。 但是，如果要更改命中测试的形状（响应轻击的区域），则应将 `contentShape()` 修饰符与所需的形状一起使用。 例如，此代码创建一个包含图像，分隔符和一些文本的 `VStack`，然后使用 `contentShape()` 修饰符使整个堆栈可轻敲，而不仅仅是图像和文本： ```swift VStack { Image(systemName: "person.circle").resizable().frame(width: 50, height: 50) Spacer().frame(height: 50) Text("Paul Hudson") } .contentShape(Rectangle()) .onTapGesture { print("Show details for user") } ``` ================================================ FILE: example/taps-and-gestures/demo9/Demo/Demo.xcodeproj/project.pbxproj 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previews: some View { ContentView() } } ================================================ FILE: example/taps-and-gestures/demo9/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/taps-and-gestures/demo9/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/taps-and-gestures/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/taps-and-gestures/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/taps-and-gestures/demo9/README.md ================================================ 如何使用 `allowsHitTesting()` 禁用视图的点击？ === SwiftUI 允许我们使用 `allowHitTesting()` 修饰符阻止视图接收任何类型的轻击。 如果不允许对视图进行命中测试，则所有轻击都会自动继续通过视图继续到视图后面的任何内容。 为了说明这一点，这是一个 `ZStack`，其中包含一个透明的矩形，该矩形的下面带有一个按钮： ```swift ZStack { Button("Tap Me") { print("Button was tapped") } .frame(width: 100, height: 100) .background(Color.white) Rectangle() .fill(Color.red.opacity(0.2)) .frame(width: 300, height: 300) .clipShape(Circle()) .allowsHitTesting(false) } ``` 即使矩形位于按钮的顶部，它也具有 `allowHitTesting(false)` -矩形上的任何抽头都不会被矩形捕获，而是传递到下面的按钮。 当您要突出显示一个视图时，这种效果很有用-上方的红色圆圈可能是教程中 “点击此处开始” 的一部分，如果圆圈本身被水龙头抓住，该效果将无效。 ================================================ FILE: example/tooling/demo1/Demo/Demo.xcodeproj/project.pbxproj 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example/tooling/demo1/README.md ================================================ 如何以不同的动态类型大小预览布局？ === 在构建应用程序时，确保您的布局与所有动态类型的范围都很好。 这部分是因为 `SwiftUI` 本身支持它，部分原因是许多人使用较小的字体大小，因为它们想要更高的信息密度，但主要是因为许多具有可访问性的人都需要依赖它。 幸运的是，所有 `SwiftUI` 的组件本身适应动态类型大小，并且甚至可以通过使用预览中的 `\.sizeCategory` 环境值预览各种大小的设计 例如，如果您想查看视图如何使用额外的小文本，请将 `.environment(\.sizeCategory, .extraSmall)` 添加到您的内容视图预览，如下所示： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { Group { ContentView() .environment(\.sizeCategory, .extraSmall) } } } ``` 您还可以发送一组预览，所有这些预览，都使用不同的大小类别。 这允许您在各个字体并排的各个字体上看到相同的设计。 因此，此代码以额外的小尺寸，规则尺寸和最大的尺寸显示设计： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() .environment(\.sizeCategory, .extraSmall) ContentView() ContentView() .environment(\.sizeCategory, .accessibilityExtraExtraExtraLarge) } } ``` 如果您的设计在所有三个中都有伟大的工作，那么你很高兴。 提示：如果您的预览缩小，则应滚动或缩小到其他预览。 ================================================ FILE: 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"scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo2/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo2/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello, world!") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ForEach(ColorScheme.allCases, id: \.self, content: ContentView().preferredColorScheme) } } ================================================ FILE: example/tooling/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/tooling/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/tooling/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/tooling/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/tooling/demo2/README.md ================================================ 如何在亮(light)和黑暗(dark)模式下预览布局？ === 大多数 Apple 的操作系统都支持光线和黑暗模式用户界面，因此 `SwiftUI` 支持此功能的支持并不奇怪。 甚至更好，一旦您设计了界面 `Xcode`，允许您通过在预览中设置 `.preferredColorScheme()` 修改器值来预览您的外观中的布局。 例如，这显示了使用 `dark` 模式的预览： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView().preferredColorScheme(.dark) } } ``` 如果您希望并排看到亮(light)和黑暗(dark)模式，请在组中放置多个预览，如下所示： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { ForEach(ColorScheme.allCases, id: \.self) { ContentView().preferredColorScheme($0) } } } ``` 有一点额外简明，你可以进一步下来： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { ForEach(ColorScheme.allCases, id: \.self, content: ContentView().preferredColorScheme) } } ``` 提示：如果您的预览缩小，则应滚动或缩小到其他预览。 ================================================ FILE: example/tooling/demo3/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo3/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello, world!") .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() .previewDevice(PreviewDevice(rawValue: "iPhone 12")) .previewDisplayName("iPhone 12") ContentView() .previewDevice(PreviewDevice(rawValue: "iPhone 12 Pro Max")) .previewDisplayName("iPhone 12 Pro Max") } } ================================================ FILE: example/tooling/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var 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================================================ FILE: example/tooling/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/tooling/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/tooling/demo3/README.md ================================================ 如何在不同的设备中预览布局？ === `XCode` 的 `SwiftUI` 预览让我们使用 `.previewDevice()` 修改器同时在多个屏幕大小中显示我们的设计。 这需要提供具有 `XCode`目的菜单中的设备的确切名称，例如，如 `XCode` 的目标菜单所示。 `iPhone 12`。 例如，这显示了`iPhone 12 Pro Max`上的预览： ```swift ContentView() .previewDevice(PreviewDevice(rawValue: "iPhone 12 Pro Max")) ``` 使用特定设备进行预览时，您可能会发现添加在 `.previewDisplayName()` 修改器中有用，允许您在预览窗口中的设备下放置名称。 例如，这为两个不同的设备创建了两个预览，添加了每个的名称，使其清除发生的内容： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() .previewDevice(PreviewDevice(rawValue: "iPhone 12")) .previewDisplayName("iPhone 12") ContentView() .previewDevice(PreviewDevice(rawValue: "iPhone 12 Pro Max")) .previewDisplayName("iPhone 12 Pro Max") } } ``` ================================================ FILE: example/tooling/demo4/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D5F6916260B385900E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F6903260B385800E964BB /* 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"xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo4/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello World") .navigationTitle("Welcome") .frame(width: 300, height: 500, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { NavigationView { ContentView() } } } ================================================ FILE: example/tooling/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/24. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/tooling/demo4/Demo/iOS/Info.plist 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CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/tooling/demo4/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/tooling/demo4/README.md ================================================ 如何在导航视图中预览布局？ === 如果您设计了您知道将作为导航堆栈的一部分呈现的视图，但本身并不包含导航视图，默认情况下不会看到其导航标题或按钮。 幸运的是，您可以将您的视图添加到预览内部的导航视图 - 这模拟了顶部的导航栏，而无需实际为实时代码添加一个，因此您可以查看其外观。 例如，此视图没有导航视图，但是被配置为以特定方式显示，当呈现为一个 - 即从另一个视图推送： ```swift struct ContentView: View { var body: some View { Text("Hello World") .navigationTitle("Welcome") } } ``` 要预览导航视图中的预览，请在预览中添加围绕内容视图的 `NavigationView`： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { NavigationView { ContentView() } } } ``` 这允许您准确地查看视图如何外观，而无需修改视图的实际布局。 ================================================ FILE: example/tooling/demo5/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D5F693F260B3A1700E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F692C260B3A1600E964BB /* DemoApp.swift */; }; 7D5F6940260B3A1700E964BB /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F692C260B3A1600E964BB /* DemoApp.swift */; }; 7D5F6941260B3A1700E964BB /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D5F692D260B3A1600E964BB /* ContentView.swift */; }; 7D5F6942260B3A1700E964BB /* ContentView.swift in 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$(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/tooling/demo5/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/tooling/demo5/README.md ================================================ 如何使用 `Instruments` 来配置您的 SwiftUI 代码并识 `identify` 布局？ === Xcode 的仪器工具有一个梦幻般的 `SwiftUI` 的分析，允许我们识别次删除的频率，计算身体的速度较慢，甚至我们的国家如何随时间变化。 首先，我们需要一些能够提供有趣的结果，我们可以在乐器中看待。 因此，此代码创建一个计时器，触发每 `0.01`秒，并具有显示随机 `UUID`和按钮的正文视图，该按钮增加其显示它显示的值： ```swift import Combine import SwiftUI class FrequentUpdater: ObservableObject { let objectWillChange = PassthroughSubject() var timer: Timer? init() { timer = Timer.scheduledTimer( withTimeInterval: 0.01, repeats: true ) { _ in self.objectWillChange.send() } } } struct ContentView: View { @ObservedObject var updater = FrequentUpdater() @State private var tapCount = 0 var body: some View { VStack { Text("\(UUID().uuidString)") Button("Tap count: \(tapCount)") { tapCount += 1 } } } } ``` 如果您在模拟器中运行该代码，则会看到它不断重绘，因为它具有始终更改的值。 注意：这是一个专门设计的压力测试，使 `SwiftUI` 进行大量工作，以便仪器显示我们有趣的数据 - 您不想在实际应用中使用上面的代码。 ## 检测我们的代码 现在按 `Cmd+I` 通过仪器运行代码，然后选择 `SwiftUI` 仪器。 出现时，按 `Record` 按钮使其启动应用程序并开始观看。 现在让它在点击按钮10左右时运行几秒钟，然后在仪器中按停止 - 我们有足够的数据来使用。 默认情况下，`SwiftUI`仪器告诉我们各种各样的事情： 1. 在此期间创建了多少次观看以及创建它们需要多长时间（“查看body View Body”） 2. 观点的属性是什么以及它们如何随时间改变（“查看属性 View Properties”） 3. 发生了多少核心动画（“核心动画提交 Core Animation Commits”） 4. 正是每个函数调用所花费的时间（“时间剖析器 Time Profiler”） 这些仪器中的每一个都可以帮助您诊断和解决您的SWIFTUI应用程序中的性能问题，因此值得花时间尝试。 对于我们的小压力测试沙箱，您将看到视图身体，查看属性和核心动画提交的固体墙壁，这是一个直接的红旗。 它告诉我们，不仅是Swifui不得不经常重新创建观点，但我们的房产经常更改，因此核心动画必须加班以便跟上。 ![](imgs/1.png) ## 监测 body 调用 如果您选择 `View Body` 轨迹 - 这是仪器列表的第一行-您应该能够看到 Instruments 将结果分解为 SwiftUI 和您的项目，其中前者是原始类型，例如文本视图和按钮，后者包含您的自定义视图类型。在我们的情况下，这意味着 `ContentView` 应出现在自定义视图中，因为这就是我们的视图名称。 现在，您将在这里看不到的是代码到 `SwiftUI` 视图的完美一对一映射，因为 `SwiftUI` 会主动折叠其视图层次结构以减少工作量。因此，不要期望在代码中看到任何 `VStack` 创建内容-该应用程序实际上是免费的。 在此屏幕上，重要的数字是“计数”和“平均持续时间” –每件事创建了多少次，花费了多长时间。由于这是一个压力测试，您应该会看到Count的数字很高，但是我们的布局微不足道，因此Avg Duration可能只有几十微秒。 ![](imgs/2.png) ## 跟踪状态变化 Tracking state changes 接下来，选择`View Properties` 轨道，它是仪器列表中的第二行。这将显示所有视图的所有属性，包括它们的当前值和所有先前的值。 我们的示例应用程序具有一个按钮，可在点击时通过将一个数字添加一个按钮来更改其标签，并且该按钮在此工具中就可见了-查找视图类型 `ContentView` 和属性类型 `State`。 遗憾的是，Instruments无法（尚未？）向我们显示确切的属性名称，如果您要跟踪几条整数状态，则可能会更加令人困惑。但是，它确实有一个不同的技巧：在记录窗口的顶部是一个标记当前视图位置的箭头，如果在周围拖动它，您将确切地看到应用程序状态随时间的变化–每次您轻按按钮，您将看到状态整数加1，并且您可以向前和向后滚动以查看它的发生。 这可以释放巨大的力量，因为它可以让我们直接查看状态更改何时导致缓慢的重绘或其他工作-就像是在时光机中，您可以在其运行期间随时检查应用程序的确切状态。 ![](imgs/3.png) ## 识别慢绘制 Identifying slow draws 尽管 `SwiftUI` 可以直接使用 `Metal` 来提高性能，但大多数情况下，它更喜欢使用 `Core Animation` 进行渲染。 这意味着我们会自动从 `Instruments` 获得内置的 `Core Animation` 分析工具，包括检测昂贵提交的功能。 当将多个更改放到一个组中（称为事务）时，`Core Animation`效果最佳。 我们有效地在一个事务中堆叠了一部分工作，然后要求 `CA` 继续进行工作-称为提交事务。 因此，当 `Instruments` 向我们展示昂贵的 `Core Animation` 提交时，真正向我们展示的是 `SwiftUI` 由于更新而被迫在屏幕上重新绘制像素的次数。 从理论上讲，这仅应在应用程序的实际状态导致不同的视图层次结构时发生，因为 `SwiftUI` 应该能够将 `body` 属性的新输出与先前的输出进行比较。 ![](imgs/4.png) ## 寻找慢速功能调用 Looking for slow function calls 最后一个重要的轨道是最后一个轨道，即 `Time Profiler`，它向我们显示了在代码的每个部分中花费了多少时间。 该工具的工作方式与 `Instruments` 中的常规时间分析器相同，但是如果您以前没有尝试过，则至少需要了解以下内容： 1. 右侧的扩展详细信息窗口默认显示最重的堆栈跟踪，这是运行时间最长的一段代码。明亮的代码（白色或黑色，具体取决于您的macOS配色方案）是您编写的代码；暗淡的代码（灰色）是系统库代码。 2. 在左侧，您可以看到所有创建的线程，以及显示指示器，可让您深入了解它们调用的功能以及这些功能调用的功能，等等。大多数工作将在“开始”内部进行。 3. 为避免混乱，您可能需要单击底部的“调用树”按钮，然后选择“隐藏系统库”。这只会显示您编写的代码，但是，如果您的问题是您严重使用了系统库，则可能无济于事。 4. 要直接了解特定细节，您还可以单击“调用树”，然后选择“反转调用树”来翻转内容，以便在顶部显示叶子功能（位于树末端的功能），并且现在可以使用公开指示器来进行向下钻取。 （向上钻取？）调用它们的功能。 尽管时间分析器对于识别性能问题非常有用，但是通常只要查看最重的堆栈跟踪就会突出显示最大的问题。 ![](imgs/5.png) ## 最后提示 Last tips 在冲销概要分析自己的代码之前，需要注意以下几点： 1. 在检查应用程序性能的一小部分时，应在相关范围内单击并拖动，以便仅查看该应用程序那部分的统计信息。这使您可以专注于特定操作的性能，例如响应按钮按下。 2. 即使您在 `Instruments` 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else { Text("Locked") } } .onAppear(perform: authenticate) } func authenticate() { let context = LAContext() var error: NSError? // 检查是否可以进行生物特征认证 if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) { // 有可能，所以继续使用它 let reason = "We need to unlock your data." context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { success, authenticationError in // 身份验证现已完成 DispatchQueue.main.async { if success { self.isUnlocked = true print("成功认证") } else { self.isUnlocked = false print("有个问题") } } } } else { print("没有生物识别") // 没有生物识别 } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/tooling/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/4/7. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() .frame(minWidth: 450, minHeight: 300) } } } ================================================ FILE: example/tooling/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/tooling/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 NSFaceIDUsageDescription $(PRODUCT_NAME) need Touch Id or Face ID permission for app lock LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/tooling/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/tooling/demo6/README.md ================================================ 如何在 `SwiftUI` 中使用 `Touch ID` 和 `Face ID`? === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 苹果公司的绝大多数设备都标配有生物识别认证，这意味着它们使用指纹和面部识别来解锁。我们也可以使用此功能，这意味着我们可以确保仅当有效用户解锁后才能读取敏感数据。 ![](imgs/1.png) 在编写任何代码之前，您需要向 `Info.plist` 文件中添加一个新密钥，向用户说明为什么要访问 `Face ID`。由于只有 `Apple` 知道的原因，我们在代码中传递了 `Touch ID` 请求原因，而在 `Info.plist` 中传递了 `Face ID` 请求原因。 立即打开 `Info.plist`，右键单击一些空间，然后选择 `Add Row`。滚动键列表，直到找到 `Privacy - Face ID Usage Description`，并为其赋予值 `$(PRODUCT_NAME) need Touch Id or Face ID permission for app lock`。 ```xml NSFaceIDUsageDescription $(PRODUCT_NAME) need Touch Id or Face ID permission for app lock ``` 现在回到 `ContentView.swift`，并在文件顶部附近添加以下导入： ```swift import LocalAuthentication ``` 好的，我们都准备好使用生物识别技术了。我之前提到过这“只是有点令人不快”，这就是它的来源：`Swift` 开发人员使用 `Error` 协议来表示运行时发生的错误，但 `Objective-C` 使用一个名为 `NSError` 的特殊类。因为这是一个 `Objective-C API`，我们需要使用 `NSError` 来处理问题，并像常规的 `inout` 参数一样使用 `&` 传递它。 我们将编写一个 `authenticate()` 方法，将所有生物识别功能隔离在一个地方。要做到这一点，需要四个步骤： 1. 创建 `LAContext` 的实例，它允许我们查询生物特征状态并执行身份验证检查。 2. 询问上下文是否能够执行生物识别认证——这很重要，因为 `iPod touch` 既没有 `Touch ID` 也没有 `Face ID`。 3. 如果生物识别是可能的，那么我们开始实际的身份验证请求，传入一个闭包以在身份验证完成时运行。 4. 当用户通过身份验证与否时，我们的完成闭包将被调用并告诉我们它是否有效，如果不是，错误是什么。这个闭包会从主线程调用，所以我们需要将任何与 UI 相关的工作推回到主线程。 请继续将此方法添加到 `ContentView`： ```swift func authenticate() { let context = LAContext() var error: NSError? // 检查是否可以进行生物特征认证 if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) { // 有可能，所以继续使用它 let reason = "We need to unlock your data." context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { success, authenticationError in // 身份验证现已完成 DispatchQueue.main.async { if success { // authenticated successfully self.isUnlocked = true print("成功认证") } else { // there was a problem self.isUnlocked = false print("有个问题") } } } } else { print("没有生物识别") // 没有生物识别 } } ``` 该方法本身不会做任何事情，因为它根本没有连接到 `SwiftUI`。 为了解决这个问题，我们需要添加一些状态，我们可以在身份验证成功时进行调整，以及一个 `onAppear()` 修饰符来触发身份验证。 因此，首先将此属性添加到 `ContentView`： ```swift @State private var isUnlocked = false ``` 这个简单的布尔值将存储应用程序是否显示其受保护的数据，因此我们将在身份验证成功时将其翻转为 true。 将 `// authenticated successfully` 的注释替换为： ```swift self.isUnlocked = true ``` 最后，我们可以显示当前的身份验证状态并在 body 属性中开始身份验证过程，如下所示： ```swift VStack { if self.isUnlocked { Text("Unlocked") } else { Text("Locked") } } .onAppear(perform: authenticate) ``` 如果您运行该应用程序，很有可能您只会看到 `Locked` 而没有其他内容。 这是因为模拟器默认情况下没有选择生物识别，而且我们没有提供任何错误消息，所以它默默地失败了。 要使用 `Face ID` 进行试用，请转到 `Hardware` 菜单并选择 `Face ID`> `Enrolled(已注册)`，然后再次启动该应用程序。 这次您应该会看到 `Face ID` 提示出现，您可以通过返回硬件菜单并选择 `Face ID` > `Matching Face` 或 `Non-matching Face` 来触发成功或失败的身份验证。 一切顺利，您应该会看到 `Face ID` 提示消失，其下方将是 `Unlocked` 文本视图——我们的应用程序已检测到身份验证，现在可以使用了。 完整代码如下： ```swift import SwiftUI import LocalAuthentication struct ContentView: View { @State private var isUnlocked = false var body: some View { VStack { if self.isUnlocked { Text("Unlocked") } else { Text("Locked") } } .onAppear(perform: authenticate) } func authenticate() { let context = LAContext() var error: NSError? // 检查是否可以进行生物特征认证 if context.canEvaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, error: &error) { // 有可能，所以继续使用它 let reason = "We need to unlock your data." context.evaluatePolicy(.deviceOwnerAuthenticationWithBiometrics, localizedReason: reason) { success, authenticationError in // 身份验证现已完成 DispatchQueue.main.async { if success { self.isUnlocked = true print("成功认证") } else { self.isUnlocked = false print("有个问题") } } } } else { print("没有生物识别") // 没有生物识别 } } } ``` ================================================ FILE: example/tooling/demo7/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo7/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo7/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } 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example/tooling/demo7/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/tooling/demo7/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/tooling/demo7/MySamplePackage/.gitignore ================================================ .DS_Store /.build /Packages /*.xcodeproj xcuserdata/ DerivedData/ .swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata ================================================ FILE: example/tooling/demo7/MySamplePackage/.swiftpm/xcode/package.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/tooling/demo7/MySamplePackage/Package.swift ================================================ // swift-tools-version:5.5 // The swift-tools-version declares the minimum version of Swift required to build this package. import PackageDescription let package = Package( name: "MySamplePackage", products: [ // Products define the executables and libraries a package produces, and make them visible to other packages. .library( name: "MySamplePackage", targets: ["MySamplePackage"]), ], dependencies: [ // Dependencies declare other packages that this package depends on. // .package(url: /* package url */, from: "1.0.0"), ], targets: [ // Targets are the basic building blocks of a package. A target can define a module or a test suite. // Targets can depend on other targets in this package, and on products in packages this package depends on. .target( name: "MySamplePackage", dependencies: []), .testTarget( name: "MySamplePackageTests", dependencies: ["MySamplePackage"]), ] ) ================================================ FILE: example/tooling/demo7/MySamplePackage/README.md ================================================ # MySamplePackage A description of this package. ================================================ FILE: example/tooling/demo7/MySamplePackage/Sources/MySamplePackage/MySamplePackage.swift ================================================ import SwiftUI public func printLog(message: Any, file: String = #file, method: String = #function, line: Int = #line) { #if DEBUG print("🍺🍺🍺\n\((file as NSString).lastPathComponent)[\(line)], \(method): \n\(message)\n🍺🍺🍺\n") #endif } public struct MySamplePackage { public private(set) var text = "Hello, World!" public init() { } } ================================================ FILE: example/tooling/demo7/MySamplePackage/Tests/MySamplePackageTests/MySamplePackageTests.swift ================================================ import XCTest @testable import MySamplePackage final class MySamplePackageTests: XCTestCase { func testExample() throws { // This is an example of a functional test case. // Use XCTAssert and related functions to verify your tests produce the correct // results. XCTAssertEqual(MySamplePackage().text, "Hello, World!") } } ================================================ FILE: example/tooling/demo7/README.md ================================================ 如何在 Xcode 中添加创建 Swift 包依赖？ === 到目前为止，我们一直在编码的所有东西都是我们从头开始构建的，因此您可以确切地看到它是如何工作的，并将这些技能应用到您自己的项目中。 但是，有时从头开始编写一些东西是有风险的：也许代码很复杂，也许很容易出错，也许经常更改，或者任何其他无数的原因，这就是存在依赖关系的原因——获取第三方代码的能力 并在我们的项目中使用它。 Xcode 内置了一个依赖管理器，称为 Swift Package Manager (SPM)。 你可以告诉 Xcode 一些在线存储的代码的 URL，它会为你下载它。 您甚至可以告诉它下载哪个版本，这意味着如果远程代码在未来某个时候发生变化，您可以确保它不会破坏您现有的代码。同时您也可以将常用方法或者一些有趣的处理抽离出来，创建成一个包，在您的项目中使用这个包。 为了尝试这个，我们使用 Xcode 创建一个 `MySamplePackage` 包，和一个 `Demo` 的工程。在 `Demo` 工程中使用 `MySamplePackage` 包进行本地开发调试。 ## 创建 `MySamplePackage` 包 在 Xcode 菜单 `File` -> `New` -> `Packages...` 创建一个名为 `MySamplePackage` 的包。 ![](./imgs/002.png) 在 `MySamplePackage/Sources/MySamplePackage/MySamplePackage.swift` 中添加一个测试方法。 ```swift import SwiftUI public func printLog(message: Any, file: String = #file, method: String = #function, line: Int = #line) { #if DEBUG print("🍺🍺🍺\n\((file as NSString).lastPathComponent)[\(line)], \(method): \n\(message)\n🍺🍺🍺\n") #endif } ``` > 🚧 注意：使用 ⌘ + b 编译。如果发现编译器报错，是因为测试代码有误。 ## 添加 `MySamplePackage` 包 通过项目工程文件目录，点击右键 `Add packages...` 将本地报源文件添加到 `Demo` 工程中。 ![](./imgs/003.png) > 🚧 注意：在添加包之前，先关闭 `MySamplePackage` 包的工程 在新工程 `Demo` -> `TARGETS` -> `General` -> `Frameworks, Libraries, and Embedded Content` 中添加 `package`，如下图： ![](./imgs/004.png) 选择添加自定义的 `MySamplePackage` 包，如下图： ![](./imgs/005.png) ## 添加测试代码 请打开 `ContentView.swift` 并将 `MySamplePackage` 包导入添加到顶部： ```swift import MySamplePackage ``` 调用自定义包 `MySamplePackage` 中的 `printLog` 方法进行测试 ```swift import SwiftUI import MySamplePackage struct ContentView: View { var body: some View { Text("Hello, world!") .padding() .onAppear(perform: { printLog(message: "Hi! ~~~") }) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ``` ![](./imgs/006.png) ================================================ FILE: example/tooling/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "2x", "size" : "60x60" }, { "idiom" : "iphone", "scale" : "3x", "size" : "60x60" }, { "idiom" : "ipad", "scale" : "1x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "2x", "size" : "20x20" }, { "idiom" : "ipad", "scale" : "1x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "2x", "size" : "29x29" }, { "idiom" : "ipad", "scale" : "1x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "2x", "size" : "40x40" }, { "idiom" : "ipad", "scale" : "1x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "76x76" }, { "idiom" : "ipad", "scale" : "2x", "size" : "83.5x83.5" }, { "idiom" : "ios-marketing", "scale" : "1x", "size" : "1024x1024" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo8/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo8/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/11/5. // import SwiftUI struct ContentView: View { 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example/tooling/demo8/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/tooling/demo8/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/tooling/demo8/README.md ================================================ 如何以纵向或横向预览布局？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) `SwiftUI` 有一个专用的 `previewInterfaceOrientation()` 修饰符，用于控制设备预览在 `Xcode` 画布中的显示方式。 要使用它，请传递四个设备旋转选项之一：`.portrait`、`.portraitUpsideDown`、`.landscapeLeft` 或 `.landscapeRight`。 例如，这将显示横向左侧预览： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() .previewInterfaceOrientation(.landscapeLeft) } } ``` ![](imgs/1.png) 请记住，您的预览提供程序可以包含多个设备，并且它们会在另一个之上显示。 这意味着您可以同时显示纵向和横向： ```swift struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() ContentView() .previewInterfaceOrientation(.landscapeLeft) } } ``` ![](imgs/2.png) ================================================ FILE: example/tooling/demo9/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/tooling/demo9/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" 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example/tooling/demo9/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/tooling/demo9/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/tooling/demo9/README.md ================================================ 如何查找导致 SwiftUI 视图更新的数据更改？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) `SwiftUI` 提供了一个特殊的、仅用于调试的方法调用，我们可以使用它来识别导致视图重新加载自身的更改。该方法专门用于调试，不应在真正的应用程序中提供，但是当您看到视图正在重新调用其 `body` 属性但您不确定为什么时，它非常有用。 该方法是 `Self._printChanges()`，应该在 `body` 属性中调用。 这意味着您将暂时需要添加显式返回来发送回您的常规视图代码。 为了演示此方法的实际应用，以下是一些示例代码，其中视图依赖于随机发出更改通知的可观察对象： ```swift class EvilStateObject: ObservableObject { var timer: Timer? init() { timer = Timer.scheduledTimer( withTimeInterval: 1, repeats: true ) { _ in if Int.random(in: 1...5) == 1 { self.objectWillChange.send() } } } } struct ContentView: View { @StateObject private var evilObject = EvilStateObject() var body: some View { print(Self._printChanges()) return Text("What could possibly go wrong?") } } ``` https://user-images.githubusercontent.com/1680273/140460379-3341d938-f7ef-432d-b773-1a0d9d960c5e.mp4 [`Peter Steinberger`](https://twitter.com/steipete/status/1379483193708052480) 有一个有用的提示，用于发现视图的 `body` 属性何时被重新调用：为其中一个视图分配随机背景颜色。 这将与 body 的其余部分一起重新评估，所以如果 `body` 被大量调用，那么你的视图会随着它们改变背景而闪烁。 要在您自己的项目中使用它，首先添加以下 `Color` 扩展以获得随机颜色： ```swift extension ShapeStyle where Self == Color { static var random: Color { Color( red: .random(in: 0...1), green: .random(in: 0...1), blue: .random(in: 0...1) ) } } ``` 现在，只要您对正在发生的事情感到好奇，就继续使用它与 `background()`： ```swift struct ContentView: View { var body: some View { Text("Hello, world!") .background(.random) } } ``` https://user-images.githubusercontent.com/1680273/140460450-d449863f-ee61-49bf-91ea-df50cbccfd9c.mp4 ================================================ FILE: example/transforming-views/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo1/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo1/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { ZStack(alignment: .bottomTrailing) { Image("scotland") Text("Photo credit: Paul Hudson.") .padding(4) .background(Color.black) .foregroundColor(.white) .offset(x: -5, y: -5) } .frame(width: 300, height: 200, alignment: /*@START_MENU_TOKEN@*/.center/*@END_MENU_TOKEN@*/) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo1/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/transforming-views/demo1/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/transforming-views/demo1/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion 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7D128C5E26006056000D5DF7 /* Project object */; } ================================================ FILE: example/transforming-views/demo1/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/transforming-views/demo1/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/transforming-views/demo1/README.md ================================================ 如何使用其偏移量调整视图的位置 `offset`？ === 所有视图在层次结构中都具有自然位置，但是 `offset()` 修饰符使您可以相对于该自然位置移动它们。 这在ZStack内部特别有用，可以在其中控制视图的重叠方式。 重要提示：使用 `offset()` 将使视图相对于其自然位置移动，但不会影响其他视图的位置或在偏移之后放置的任何其他修改器的位置。 这意味着您需要仔细考虑如何使用它，尤其是要使视图不重叠时（并非出于您的意图）。 例如，在此 `VStack` 中，我们可以使用 `offset()` 将第二项向下移动15点，以便它开始与第三项重叠： ```swift VStack { Text("Home") Text("Options") .offset(y: 15) Text("Help") } ``` 您通常会发现，将 `padding()` 与 `offset()` 结合使用可为您提供所需的结果，因为它可以移动一个视图，同时还可以调整其旁边的视图以匹配。 例如，这会将第二项下移15个点，但在其底部边缘增加15个填充点，以使其与下面的文本视图不重叠： ```swift VStack { Text("Home") Text("Options") .offset(y: 15) .padding(.bottom, 15) Text("Help") } ``` 正如我之前所说，在 `offset()` 之后放置的所有修饰符都不会受到位置变化的影响，这可能会导致意外结果。 在下面的示例中，我在偏移之前和之后都使用了 `background()` ，因此您可以看到它们之间的不同： ```swift HStack { Text("Before") .background(Color.red) .offset(y: 15) Text("After") .offset(y: 15) .background(Color.red) } ``` 当与 `ZStack` 结合使用时，偏移使我们可以将一个视图放置在另一个视图内，这在控制 `ZStack` 的对齐方式时特别有用。 例如，如果我们有一个 `ZStack` 显示照片和摄影师的名字，我们可以使用 `.bottomTrailing` 对齐方式来使图像占用所有可用空间，同时使信用额度位于右下角，然后使用 `offset(x: -5, y:-5)` 将信用额度拉回 5 个点： ```swift ZStack(alignment: .bottomTrailing) { Image("scotland") Text("Photo credit: Paul Hudson.") .padding(4) .background(Color.black) .foregroundColor(.white) .offset(x: -5, y: -5) } ``` 将 `offset` 放置在其它修饰符的末尾可确保它们一起移动。 ================================================ FILE: 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section */ 7D128D6626006E94000D5DF7 /* Build configuration list for PBXProject "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D128D7926006E96000D5DF7 /* Debug */, 7D128D7A26006E96000D5DF7 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; 7D128D7B26006E96000D5DF7 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D128D7C26006E96000D5DF7 /* Debug */, 7D128D7D26006E96000D5DF7 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D128D6326006E94000D5DF7 /* Project object */; } ================================================ FILE: example/transforming-views/demo10/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/transforming-views/demo10/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/transforming-views/demo10/README.md ================================================ 如何旋转 3D 视图？ === SwiftUI 的 `rotation3DEffect()` 修饰符使我们可以在3D空间中旋转视图，从而几乎无需编写代码即可创建漂亮的效果。 它接受两个参数：要旋转的角度（以度或弧度为单位），外加包含执行旋转所围绕的 `X`，`Y` 和 `Z` 轴的元组。 重要提示：如果您从未进行过3D旋转，则应将 `X/Y/Z` 轴视为倾斜的视图。 X轴是水平的，因此，如果您在X轴上旋转，就好像在视图中放了一根水平线–任何旋转都会使顶部或底部更近或更远，但不会调整前缘和后缘。 因此，如果您想将某些文本绕X轴旋转 `45` 度（这会使文本顶部看起来比底部看起来更远），则可以这样编写： ```swift Text("EPISODE LLVM") .font(.largeTitle) .foregroundColor(.yellow) .rotation3DEffect(.degrees(45), axis: (x: 1, y: 0, z: 0)) ``` ================================================ FILE: example/transforming-views/demo11/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { 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================================================ FILE: example/transforming-views/demo11/README.md ================================================ 如何放大或缩小视图？ === SwiftUI 的 `scaleEffect()` 修饰符使我们可以自由地增加或减小视图的大小。 例如，我们可以使文本视图的大小是其常规大小的五倍，如下所示： ```swift Text("Up we go") .scaleEffect(5) .frame(width: 300, height: 300) ``` 如果需要，可以独立缩放 `X` 和 `Y` 尺寸，从而可以像这样挤压视图： ```swift Text("Up we go") .scaleEffect(x: 1, y: 5) .frame(width: 300, height: 300) ``` 如果需要更多控制，可以为缩放指定锚点，如下所示： ```swift Text("Up we go") .scaleEffect(2, anchor: .bottomTrailing) .frame(width: 300, height: 300) ``` 这使文本视图从右下角开始缩放，是其常规大小的两倍。 提示：放大视图不会导致它以新的大小重新绘制，而只是向上或向下拉伸。 这意味着小文本看起来会模糊，小图像可能看起来像像素化或模糊。 ================================================ FILE: example/transforming-views/demo12/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } 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================================================ FILE: example/transforming-views/demo12/README.md ================================================ 如何圆角化一个视图？ === 任何 `SwiftUI` 视图都可以使用 `cornerRadius()` 修饰符将其角圆化。 这是一个简单的以点为单位的值，控制着舍入的程度有多明显。 因此，您可以创建一个带有25个圆角的文本视图，如下所示： ```swift Text("Round Me") .padding() .background(Color.red) .cornerRadius(25) ``` 您可以将 `clipShape()` 修饰符与 `Capsule` 一起使用，自动将最短的边缘完全弄圆，如下所示： ```swift Text("Round Me") .padding() .background(Color.red) .clipShape(Capsule()) ``` ================================================ FILE: example/transforming-views/demo13/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo13/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { 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属性一样，它接受介于0（完全不可见）和1（完全不透明）之间的值。 例如，这将创建一个具有红色背景的文本视图，然后为其提供 `30％` 的不透明度： ```swift Text("Now you see me") .padding() .background(Color.red) .opacity(0.3) ``` 修改不透明度非常快-当然，您可以根据需要经常执行某些操作。 为了说明这一点，下面的代码使用滑块调整了文本的不透明度，您将看到您可以在不影响性能的情况下快速，随意地移动它： ```swift struct ContentView: View { @State private var opacity = 0.5 var body: some View { VStack { Text("Now you see me") .padding() .background(Color.red) .opacity(opacity) Slider(value: $opacity, in: 0...1) .padding() } } } ``` ================================================ FILE: example/transforming-views/demo14/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo14/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", 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Here") { print("Button pressed!") } } .accentColor(.orange) ``` ================================================ FILE: example/transforming-views/demo15/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo15/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" 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ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Image("laser-show") .resizable() .frame(width: 300, height: 300) .mask(Text("SWIFT!") .font(.system(size: 72))) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo15/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/transforming-views/demo15/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: 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300) .mask(Text("SWIFT!") .font(.system(size: 72))) ``` `mask()` 修饰符与 `clipShape()` 不同，因为它也可以应用蒙版视图中的任何透明度–基于蒙版的透明度，您在基础视图中会出现孔。 另一方面，`clipShape()` 仅调整将其应用到的视图的外部形状。 ================================================ FILE: example/transforming-views/demo16/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo16/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo16/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo16/Demo/Demo/Assets.xcassets/dog.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "w.jpeg", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo16/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var blurAmount: CGFloat = 6 var body: some View { VStack { Image("dog") .resizable() .frame(width: 300, height: 300) .blur(radius: 20) Text("Welcome to my SwiftUI app") .blur(radius: blurAmount) Slider(value: $blurAmount, in: 0...10) } .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo16/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/transforming-views/demo16/Demo/Demo/DemoApp.swift ================================================ // // 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=== `blur()` 修饰符使我们可以根据自己的选择将实时高斯模糊应用于视图。 例如，这将创建 `300x300` 的个人资料图片，然后添加 `20` 点高斯模糊： ```swift Image("dog") .resizable() .frame(width: 300, height: 300) .blur(radius: 20) ``` 您可以模糊任何所需的内容，包括文本视图： ```swift Text("Welcome to my SwiftUI app") .blur(radius: 2) ``` 模糊非常有效，您可以像其他任何状态一样动态调整它。例如，这使您可以尝试通过拖动滑块来动态调整文本的模糊度： ```swift struct ContentView: View { @State private var blurAmount: CGFloat = 0 var body: some View { VStack { Text("Drag the slider to blur me") .blur(radius: blurAmount) Slider(value: $blurAmount, in: 0...20) } } } ``` ================================================ FILE: example/transforming-views/demo17/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo17/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo17/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo17/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { ZStack { Circle() .fill(Color.red) .frame(width: 200, height: 200) .offset(x: -50) .blendMode(.screen) Circle() .fill(Color.blue) .frame(width: 200, height: 200) .offset(x: 50) .blendMode(.screen) } .frame(width: 400) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo17/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/transforming-views/demo17/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/transforming-views/demo17/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/transforming-views/demo17/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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如何将视图融合在一起？ === 将一个视图放在另一个视图上时，可以使用 `blendMode()` 修饰符控制它们的重叠方式。 这包含多种将颜色混合在一起的方法，例如使用它们的差异或使用颜色加深-如果您以前使用过 `Core Graphics` 或类似 `Photoshop` 的工具，那么这些方法将会很熟悉。 为了演示这一点，我们可以创建一个内部有两个重叠圆的 `ZStack`，其中第二个圆具有 `.multiply` 混合模式，以使其背后的颜色变暗： ```swift ZStack { Circle() .fill(Color.red) .frame(width: 200, height: 200) .offset(x: -50) .blendMode(.screen) Circle() .fill(Color.blue) .frame(width: 200, height: 200) .offset(x: 50) .blendMode(.screen) } .frame(width: 400) ``` ================================================ FILE: example/transforming-views/demo18/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo18/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", 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"images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "w.jpeg", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo18/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Image("cat") .colorMultiply(.red) Image("cat") .saturation(0.3) Image("cat") .contrast(0.5) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo18/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only 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================================================ FILE: example/transforming-views/demo18/README.md ================================================ 如何通过着色，去饱和等来调整视图？ === SwiftUI 允许我们通过使用各种修饰符来调整视图的亮度，色调，色相，饱和度等，从而更好地控制视图的外观。 例如，这将创建一个图像视图并将整个物体着色为红色： ```swift Image("cat") .colorMultiply(.red) ``` 您可以将视图的饱和度调整为任意数量，其中 `0.0` 是全灰色，而 `1.0` 是其原始颜色： ```swift Image("boats") .saturation(0.3) ``` 您甚至可以使用对比度 `contrast()` 修饰符动态调整视图的对比度。 值为 `0.0` 不会产生对比度（纯灰色图像），值为 `1.0` 会为您提供原始图像，而高于 `1.0` 的所有值都会增加对比度。 因此，这会将图像对比度降低到 `50％`： ```swift Image("sunset") .contrast(0.5) ``` ================================================ FILE: example/transforming-views/demo19/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo19/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo19/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo19/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct BlueButton: ButtonStyle { func makeBody(configuration: Configuration) -> some View { configuration.label .padding() .background(Color(red: 0, green: 0, blue: 0.5)) .foregroundColor(.white) .clipShape(Capsule()) } } struct ContentView: View { var body: some View { Button("Press Me") { print("Button pressed!") } .buttonStyle(BlueButton()) .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo19/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only 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================================================ FILE: example/transforming-views/demo19/README.md ================================================ 使用 ButtonStyle 自定义按钮？ === SwiftUI 具有许多样式协议，这些协议使我们能够为诸如 `Button`，`ProgressView`，`Toggle` 等视图定义通用样式。 它们全部通过允许我们集中任意数量的修饰符来使视图看起来像我们想要的方式起作用，并提供修饰符，这些修饰符使我们可以在一行中应用全套定制。 例如，这是一个样式声明为嵌入式的按钮： ```swift Button("Press Me") { print("Button pressed!") } .padding() .background(Color(red: 0, green: 0, blue: 0.5)) .clipShape(Capsule()) ``` 这对于单个按钮来说效果很好，但是如果这是整个应用程序中的标准按钮设计，则应考虑改用自定义按钮样式。 这意味着创建一个符合 `ButtonStyle` 协议的新结构，该结构将根据需要将按钮的配置传递给我们，以便对其进行操作。 因此，我们可以将这三个修饰符集中到一个 `BlueButton` 样式中，然后将其应用到我们的按钮上，如下所示： ```swift struct BlueButton: ButtonStyle { func makeBody(configuration: Configuration) -> some View { configuration.label .padding() .background(Color(red: 0, green: 0, blue: 0.5)) .foregroundColor(.white) .clipShape(Capsule()) } } struct ContentView: View { var body: some View { Button("Press Me") { print("Button pressed!") } .buttonStyle(BlueButton()) } } ``` 我们传递的按钮配置包括按钮当前是否被按下，因此我们可以使用它来调整按钮。 例如，我们可以创建第二种样式，使按钮在按下时变大： ```swift struct GrowingButton: ButtonStyle { func makeBody(configuration: Configuration) -> some View { configuration.label .padding() .background(.blue) .foregroundStyle(.white) .clipShape(Capsule()) .scaleEffect(configuration.isPressed ? 1.2 : 1) .animation(.easeOut(duration: 0.2), value: configuration.isPressed) } } struct ContentView: View { var body: some View { Button("Press Me") { print("Button pressed!") } .buttonStyle(GrowingButton()) } } ``` ================================================ FILE: example/transforming-views/demo2/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo2/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json 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example/transforming-views/demo2/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Text("Examples with Swift") .padding() .background(Color.red) .foregroundColor(.white) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo2/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/transforming-views/demo2/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } 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Swift") .background(Color.red) .foregroundColor(.white) .padding() ``` 这会添加系统默认填充，然后设置黑色背景颜色和白色前景： ```swift Text("Examples with Swift") .padding() .background(Color.red) .foregroundColor(.white) ``` 这两段代码可能看起来相似，但是它们产生不同的结果，因为应用修饰符的顺序很重要。 在第二个示例中，视图被填充然后被着色，这意味着填充也被着色为黑色。 相比之下，第一个示例将填充颜色，因此填充保持不变色。 因此，如果您希望某些文本的背景颜色比文本本身宽，请确保使用第二个代码示例-先填充然后上色。 ================================================ FILE: example/transforming-views/demo20/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo20/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", 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strokeColor = Color.blue var strokeWidth = 25.0 func makeBody(configuration: Configuration) -> some View { let fractionCompleted = configuration.fractionCompleted ?? 0 return ZStack { Circle() .trim(from: 0, to: CGFloat(fractionCompleted)) .stroke(strokeColor, style: StrokeStyle(lineWidth: CGFloat(strokeWidth), lineCap: .round)) .rotationEffect(.degrees(-90)) } } } struct ContentView: View { @State private var progress = 0.2 var body: some View { ProgressView(value: progress, total: 1.0) .progressViewStyle(GaugeProgressStyle()) .frame(width: 200, height: 200) .contentShape(Rectangle()) .onTapGesture { if progress < 1.0 { withAnimation { progress += 0.2 } } } .padding(100) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo20/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox 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================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/transforming-views/demo20/README.md ================================================ 使用 ProgressViewStyle 自定义 ProgressView === SwiftUI 为我们提供了 `ProgressViewStyle` 协议，可为 `ProgressView` 创建自定义设计，从而使我们能够阅读进度视图的完整程度，并在设计中将其考虑在内。 要创建自定义的 `ProgressView` 样式，您需要创建一个具有 `makeBody()` 方法的结构，该结构接受视图的当前配置。 然后，您可以继续并根据需要渲染进度（也许是文本百分比，或者是不断增大的圆圈，依此类推），然后返回完成的布局以进行渲染。 为了说明这一点，下面是一种自定义样式，该样式创建了一个量规，将进度显示为笔划的圆圈，并随着进度的增加而逐渐完善： ```swift struct GaugeProgressStyle: ProgressViewStyle { var strokeColor = Color.blue var strokeWidth = 25.0 func makeBody(configuration: Configuration) -> some View { let fractionCompleted = configuration.fractionCompleted ?? 0 return ZStack { Circle() .trim(from: 0, to: CGFloat(fractionCompleted)) .stroke(strokeColor, style: StrokeStyle(lineWidth: CGFloat(strokeWidth), lineCap: .round)) .rotationEffect(.degrees(-90)) } } } // 允许您通过点击手势调整进度的视图 struct ContentView: View { @State private var progress = 0.2 var body: some View { ProgressView(value: progress, total: 1.0) .progressViewStyle(GaugeProgressStyle()) .frame(width: 200, height: 200) .contentShape(Rectangle()) .onTapGesture { if progress < 1.0 { withAnimation { progress += 0.2 } } } } } ``` 请注意，我的自定义样式是如何将圆逆时针旋转90度，以便圆从顶部开始绘制。 ================================================ FILE: example/transforming-views/demo21/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo21/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" 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makeBody(configuration: Configuration) -> some View { Button { configuration.isOn.toggle() } label: { Label { configuration.label } icon: { Image(systemName: configuration.isOn ? "checkmark.circle.fill" : "circle") .foregroundColor(configuration.isOn ? .accentColor : .secondary) .accessibility(label: Text(configuration.isOn ? "Checked" : "Unchecked")) .imageScale(.large) } } .buttonStyle(PlainButtonStyle()) } } struct ContentView: View { @State private var isOn = false var body: some View { Toggle("Switch Me", isOn: $isOn) .toggleStyle(CheckToggleStyle()) .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo21/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/transforming-views/demo21/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/transforming-views/demo21/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/transforming-views/demo21/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo21/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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SWIFT_VERSION = 5.0; }; name = Release; }; /* End XCBuildConfiguration section */ /* Begin XCConfigurationList section */ 7D498E852600A33F00504434 /* Build configuration list for PBXProject "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D498E982600A34000504434 /* Debug */, 7D498E992600A34000504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; 7D498E9A2600A34000504434 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D498E9B2600A34000504434 /* Debug */, 7D498E9C2600A34000504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D498E822600A33F00504434 /* Project object */; } ================================================ FILE: example/transforming-views/demo21/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/transforming-views/demo21/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/transforming-views/demo21/README.md ================================================ 使用 ToggleStyle 自定义 Toggle === SwiftUI 为我们提供了 `ToggleStyle` 协议，以自定义 `Toggle` 开关的外观和工作方式。 符合此协议的任何结构都必须实现 `makeBody()` 方法，该方法可以根据需要呈现 `Toggle`，同时提供用于切换的标签和isOn绑定，您可以进行翻转来调整切换。 重要提示：当您自定义这样的 `Toggle` 开关时，您将不得不自己以某种方式打开打开状态 – SwiftUI不会为您完成此操作。 为了演示自定义切换样式，以下是一种使用按钮翻转打开状态，然后添加自定义标签以显示该状态的样式。我没有像标准的 iOS `Toggle` 那样使用动圈，而是使该节目成为两个 `SF` 符号之一： ```swift struct CheckToggleStyle: ToggleStyle { func makeBody(configuration: Configuration) -> some View { Button { configuration.isOn.toggle() } label: { Label { configuration.label } icon: { Image(systemName: configuration.isOn ? "checkmark.circle.fill" : "circle") .foregroundColor(configuration.isOn ? .accentColor : .secondary) .accessibility(label: Text(configuration.isOn ? "Checked" : "Unchecked")) .imageScale(.large) } } .buttonStyle(PlainButtonStyle()) } } // 一个示例视图，显示了实际的样式 struct ContentView: View { @State private var isOn = false var body: some View { Toggle("Switch Me", isOn: $isOn) .toggleStyle(CheckToggleStyle()) } } ``` ================================================ FILE: example/transforming-views/demo22/README.md ================================================ 如何更改`List`、`TextEditor`等的背景色 === 有些 `SwiftUI` 视图具有默认的背景颜色，会覆盖你自己尝试应用的任何背景颜色，但如果你使用 `scrollContentBackground()` 修饰符，你可以隐藏该默认背景并替换为其他内容。截至撰写本文时，此方法适用于 `List` 、 `TextEditor和Form` ，因此你可以移除或更改它们的背景颜色。 例如，这将删除列表的默认背景，并替换为靛蓝色： ```swift List(0..<100) { i in Text("Example \(i)") } .scrollContentBackground(.hidden) .background(.indigo) ``` 这将隐藏 `TextEditor` 的默认背景并用渐变色替换它： ```swift struct ContentView: View { @State private var bio = "Describe yourself" var body: some View { TextEditor(text: $bio) .scrollContentBackground(.hidden) .background(.linearGradient(colors: [.white, .gray], startPoint: .top, endPoint: .bottom)) } } ``` ================================================ FILE: example/transforming-views/demo3/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo3/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : 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================================================ FILE: example/transforming-views/demo4/README.md ================================================ 如何在视图周围绘制边框？ === SwiftUI 为我们提供了专用的 `border()` 修饰符，可在视图周围绘制边框。 根据您要指定笔划宽度还是拐角半径，它会有一些变化，因此这里有一些示例： 这会在文本视图周围添加一个简单的1点黑色边框： ```swift Text("Examples with Swift") .border(Color.green) ``` 如果要使边框不位于视图的边缘，请首先添加一些填充： ```swift Text("Examples with Swift") .padding() .border(Color.green) ``` 这将添加一个4点红色边框： ```swift Text("Examples with Swift") .padding() .border(Color.red, width: 4) ``` 如果您想要任何更高级的功能（例如，如果要舍入边框的角），则需要改用 `overlay()` 修饰符。 例如，这将添加一个带有 16 点圆角的 4 点蓝色边框： ```swift Text("Examples with Swift") .padding() .overlay( RoundedRectangle(cornerRadius: 16) .stroke(Color.blue, lineWidth: 4) ) ``` 提示：对形状使用 `stroke()` 或 `strokeBorder()` ，对其他视图类型使用 `border()` 。 ================================================ FILE: example/transforming-views/demo5/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { 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example/transforming-views/demo5/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo5/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Circle() .stroke(Color.blue, lineWidth: 50) .frame(width: 200, height: 200) .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo5/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: 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================================================ FILE: example/transforming-views/demo5/README.md ================================================ 如何在视图内绘制边框？ === `SwiftUI` 为我们提供了 `stroke()` 和 `strokeBorder()` 修饰符，用于在形状周围绘制边框，它们的行为略有不同： `strokeBorder()` 修饰符将视图插入边框宽度的一半，然后应用笔触，这意味着整个边框都在视图内部绘制。 `stroke()` 修饰符绘制一个以视图边缘为中心的边框，这意味着边框的一半位于视图内部，一半位于视图外部。 重要说明：这两个修饰符仅适用于形状–您可以将 `stroke()` 和 `strokeBorder()` 与 `Circle`，`Rectangle`，`Capsule`等一起使用，而不能与 `Text`，`Image` 或其他非形状视图一起使用。 如果要在非形状视图周围绘制边框，则应改用 `border()` 修饰符-请参见[“如何在视图周围绘制边框”](../demo4)。 如果您想查看一下 `strokeBorder()` ，请尝试以下操作： ```swift Circle() .strokeBorder(Color.blue, lineWidth: 50) .frame(width: 200, height: 200) .padding() ``` 因为它使用 `strokeBorder()`，所以将在圆内完全绘制50点蓝色笔触。 如果您不太确定与 `stroke()` 的区别，请尝试将代码更改为此： ```swift Circle() .stroke(Color.blue, lineWidth: 50) .frame(width: 200, height: 200) .padding() ``` 现在，您会看到圆圈看起来更大，因为笔划(stroke)是在圆圈的一半内和一半之外绘制的。 ================================================ FILE: 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"512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo6/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var phase: CGFloat = 0 var body: some View { Rectangle() .strokeBorder(style: StrokeStyle(lineWidth: 4, dash: [10], dashPhase: phase)) .frame(width: 200, height: 200) .onAppear { withAnimation(Animation.linear.repeatForever(autoreverses: false)) { phase -= 20 } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ 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================================================ FILE: example/transforming-views/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/transforming-views/demo6/README.md ================================================ 如何创建行军蚂蚁边框动画效果？ === SwiftUI 的笔划(stroke)可以使用破折号和破折号相位选项进行配置，这使我们可以非常精细地控制线条的绘制方式。例如，我们可以绘制一个带有虚线虚线框，如下所示： ```swift struct ContentView: View { var body: some View { Rectangle() .strokeBorder(style: StrokeStyle(lineWidth: 4, dash: [10])) } } ``` 对破折号参数使用 `[10]` 表示 `SwiftUI` 将绘制笔划的 `10` 点，然后绘制 `10` 点的空间，重复该模式直到整个矩形都被描边。 这是一个数组，因为您可以提供多个值，例如 `[10，5]`，以表示“每10个笔划，然后是5个点的间隙”。 当您在破折号阶段中添加时，这才变得真正有趣，该阶段指示了破折号和间隙应放置的位置。 如果将相位存储在状态属性中，则可以随时间对该值进行动画处理，以创建所谓的行进蚂蚁效果-围绕形状移动的虚线笔划，通常用于表示对象选择。 在代码中，它看起来像这样： ```swift struct ContentView: View { @State private var phase: CGFloat = 0 var body: some View { Rectangle() .strokeBorder(style: StrokeStyle(lineWidth: 4, dash: [10], dashPhase: phase)) .frame(width: 200, height: 200) .onAppear { withAnimation(Animation.linear.repeatForever(autoreverses: false)) { phase -= 20 } } } } ``` ================================================ FILE: example/transforming-views/demo7/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo7/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo7/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo7/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Text("Hacking with Swift") .padding() .shadow(color: .red, radius: 5, x: 20, y: 20) .border(Color.red, width: 4) } } struct 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example/transforming-views/demo7/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/transforming-views/demo7/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/transforming-views/demo7/README.md ================================================ 如何在视图周围绘制阴影？ === SwiftUI 为我们提供了专用的 `shadow()` 修饰符，可在视图周围绘制阴影。 您可以控制阴影的颜色，半径和位置，还可以通过调整修改器顺序来控制视图的哪些部分被阴影化。 在其基本形式中，只需指定模糊的半径即可添加阴影，如下所示： ```swift Text("Hacking with Swift") .padding() .shadow(radius: 5) .border(Color.red, width: 4) ``` 这会增加一个非常轻微的阴影，并在文本上居中出现 5 点模糊。 您还可以指定所需的颜色，以及与原始视图的 `X` 和 `Y` 偏移量。 例如，这将以文本为中心创建带有 5 点模糊的强红色阴影： ```swift Text("Hacking with Swift") .padding() .shadow(color: .red, radius: 5) .border(Color.red, width: 4) ``` 如果要为阴影指定偏移量，请向修改器添加 `x` 和 `/` 或 `y` 参数，如下所示： ```swift Text("Hacking with Swift") .padding() .shadow(color: .red, radius: 5, x: 20, y: 20) .border(Color.red, width: 4) ``` 记住，`SwiftUI` 按照列出修饰符的顺序应用修饰符，因此，如果您希望将阴影也应用到边框，只需将 `border` 修饰符放在shadow修饰符之前： ```swift Text("Hacking with Swift") .padding() .border(Color.red, width: 4) .shadow(color: .red, radius: 5, x: 20, y: 20) ``` 提示：如果您发现阴影效果不够强，请添加另一个 `shadow()` 修饰符-您可以将它们叠加起来以创建更复杂的阴影效果。 ================================================ FILE: example/transforming-views/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { 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pressed!") } label: { Image(systemName: "bolt.fill") .foregroundColor(.white) .padding() .background(Color.green) .clipShape(Circle()) } ``` 即使 `Circle` 剪辑形状的宽度和高度不相等，也始终会从视图中生成圆–它只会裁剪较大的值以匹配较小的值。 除了 `Circle` 之外，还有 `Capsule`，它可以将视图裁剪成具有菱形形状的圆角。 例如，这将使用胶囊形状创建相同的按钮： ```swift Button { print("Pressed!") } label: { Image(systemName: "bolt.fill") .foregroundColor(.white) .padding(EdgeInsets(top: 10, leading: 20, bottom: 10, trailing: 20)) .background(Color.green) .clipShape(Capsule()) } ``` 我在那里添加了一些更精确的填充以得到更好的形状 – 您应该尝试找到自己喜欢的东西。 ================================================ FILE: example/transforming-views/demo9/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/transforming-views/demo9/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json 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example/transforming-views/demo9/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var rotation = 0.0 var body: some View { VStack { Slider(value: $rotation, in: 0...360) Text("Up we go") .rotationEffect(.degrees(rotation), anchor: .topLeading) } .padding() .frame(width: 200, height: 200, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/transforming-views/demo9/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/transforming-views/demo9/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/transforming-views/demo9/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/transforming-views/demo9/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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7D128D5E26006D38000D5DF7 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D128D5F26006D38000D5DF7 /* Debug */, 7D128D6026006D38000D5DF7 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D128D4626006D37000D5DF7 /* Project object */; } ================================================ FILE: example/transforming-views/demo9/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/transforming-views/demo9/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/transforming-views/demo9/README.md ================================================ 如何旋转视图？ === SwiftUI 的 `rotationEffect()` 修饰符使我们可以使用度数或弧度自由旋转视图。 例如，如果您想将某些文本旋转-90度以使其向上读取，则可以使用以下命令： ```swift Text("Up we go") .rotationEffect(.degrees(-90)) ``` 如果您更喜欢使用弧度，只需传入 `.radians()` 作为参数，如下所示： ```swift Text("Up we go") .rotationEffect(.radians(.pi)) ``` 视图旋转是如此之快以至于它实际上是免费的，因此，您甚至可以使用滑块使其互动，如果您想要的话： ```swift struct ContentView: View { @State private var rotation = 0.0 var body: some View { VStack { Slider(value: $rotation, in: 0...360) Text("Up we go") .rotationEffect(.degrees(rotation)) } } } ``` 默认情况下，视图绕其中心旋转，但是如果您想固定从特定点开始的旋转，则可以为此添加一个额外的参数。 例如，如果您想使滑块上方围绕视图的左上角旋转旋转，则可以这样编写： ```swift struct ContentView: View { @State private var rotation = 0.0 var body: some View { VStack { Slider(value: $rotation, in: 0...360) Text("Up we go") .rotationEffect(.degrees(rotation), anchor: .topLeading) } } } ``` ================================================ FILE: example/user-interface-controls/demo1/README.md ================================================ 使用状态 === 所有应用程序都会更改状态。例如，用户可能点击了一个按钮以显示更多信息，他们可能已经在文本框中输入了一些文本，或者从日期选择器中选择了一个日期-涉及应用程序从一种状态转移到另一种状态的所有内容。 状态的问题在于它太乱了：更改时，我们需要发现更改并更新布局以匹配。乍一看听起来很简单，但是随着我们状态的增长和发展，它变得越来越难–很容易忘记更新一件事情，或者弄错了更新顺序，从而使用户界面的状态与预期的不匹配。 `SwiftUI` 通过从控件中删除状态来解决此问题。当我们在视图中添加属性时，它们实际上是惰性的-当s然，它们具有值，但是更改它们并没有任何作用。但是，如果在它们之前添加了特殊的 `@State` 属性，`SwiftUI` 将自动监视更改并更新使用该状态的视图的任何部分。 当涉及到某种状态时（例如，在切换开关更改时告诉state属性发生变化），我们不能直接引用该属性。这是因为 `Swift` 认为我们只想立即读取该值，而不是说“请随着情况的变化也更新此值”。幸运的是，`SwiftUI` 的解决方案是在属性名称前放置一个美元符号，这使我们可以引用基础数据绑定而不是其当前值。我知道这乍一看有点令人困惑，但是在一两个小时后，它就变成了第二天性。 请记住，`SwiftUI`是声明性的，这意味着我们预先将所有可能状态的所有布局都告诉了它，并让它弄清楚了当属性更改时如何在它们之间移动。我们称之为绑定–要求 `SwiftUI` 同步 UI 控件和基础属性之间的更改。 如果您习惯了更强制性的编程风格，那么一开始使用状态会让您感到有些头疼。但是请相信我-完成后，您会一路顺风。 ================================================ FILE: example/user-interface-controls/demo10/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 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example/user-interface-controls/demo10/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo10/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var password: String = "" var body: some View { VStack { SecureField("Enter a password", text: $password) Text("You entered: \(password)") } .frame(width: 350, height: 300, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo10/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 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UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo10/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo10/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo10/README.md ================================================ 如何使用 `SecureField` 创建安全的文本字段？ === SwiftUI 的 `SecureField` 的工作原理与常规 `TextField` 几乎相同，不同之处在于，出于保护隐私的目的，这些字符被屏蔽掉了。 就像 `TextField` 一样，您需要提供一个占位符，为用户提供输入内容的建议，并且绑定到的基础值仍然是纯字符串，因此您可以根据需要进行检查。 这是一个示例，该示例创建绑定到本地 `@State` 属性的 `SecureField`，以便我们可以显示它们的键入内容： ```swift struct ContentView: View { @State private var password: String = "" var body: some View { VStack { SecureField("Enter a password", text: $password) Text("You entered: \(password)") } } } ``` ================================================ FILE: example/user-interface-controls/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D79379E26046CC000A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D79378B26046CBE00A87448 /* DemoApp.swift */; }; 7D79379F26046CC000A87448 /* DemoApp.swift in Sources */ = {isa = 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo11/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var showGreeting = true var body: some View { VStack { Toggle("Show welcome message", isOn: $showGreeting) .toggleStyle(SwitchToggleStyle(tint: .red)) Toggle("Show welcome message", isOn: $showGreeting) .toggleStyle(CheckboxToggleStyle()) if showGreeting { Text("Hello World!") } } .frame(width: 380, height: 300, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo11/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo11/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo11/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo11/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo11/README.md ================================================ 如何创建拨动开关？ === SwiftUI的切换功能使用户可以在真假状态之间切换，就像UIKit中的UISwitch一样。 例如，我们可以创建一个切换器，该切换器是否显示消息取决于切换器是否已启用，但是我们当然不需要手动跟踪切换器的状态–我们希望SwiftUI能够执行此操作 对我们来说。 相反，我们应该定义一个@State布尔属性，该属性将用于存储切换的当前值。 然后，我们可以根据需要使用它来显示或隐藏其他视图。 例如： ```swift struct ContentView: View { @State private var showGreeting = true var body: some View { VStack { Toggle("Show welcome message", isOn: $showGreeting) if showGreeting { Text("Hello World!") } } } } ``` 我已经编写了该代码，以便仅当 `showGreeting` 为 `true` 时才返回文本视图，这意味着当 `showGreeting` 为 `false` 时 `VStack` 的大小将减小–堆栈中没有第二个视图。 如果需要，可以使用 `toggleStyle()` 修饰符来自定义用于创建切换开关的颜色。 这很有用，因为 `Toggle` 视图无法与 `accentColor()` 一起使用，因此这是为其重新着色的唯一方法。 例如，这将创建一个红色切换： ```swift struct ContentView: View { @State private var showGreeting = true var body: some View { VStack { Toggle("Show welcome message", isOn: $showGreeting) .toggleStyle(SwitchToggleStyle(tint: .red)) if showGreeting { Text("Hello World!") } } } } ``` 在 macOS 中 `SwitchToggleStyle` 和 `CheckboxToggleStyle` 两个完全是不一样的控件样式 ================================================ FILE: example/user-interface-controls/demo12/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7937C72604732700A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7937B42604732600A87448 /* DemoApp.swift */; }; 7D7937C82604732700A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7937B42604732600A87448 /* DemoApp.swift */; }; 7D7937C92604732700A87448 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7937B52604732600A87448 /* ContentView.swift */; }; 7D7937CA2604732700A87448 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7937B52604732600A87448 /* ContentView.swift */; }; 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CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo12/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo12/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo12/README.md ================================================ 如何创建滑块 `Slider` 并从中读取值？ === SwiftUI 的 `Slider` 视图的工作原理与 `UISlider` 相似，尽管您需要将其绑定到某个位置以便存储其值。 创建它时，可以提供多种参数，但是您可能最关心的参数是： - `value`：将其绑定到的Double值。 - `in`：滑块的范围。 - `Step`：移动滑块时要更改多少值。 此参数是可选的。 例如，以下代码创建绑定到 `Celsius` 属性的滑块，然后随着滑块的移动更新文本视图，以便在 `Celsius` 和 `Fahrenheit` 之间转换： ```swift struct ContentView: View { @State private var celsius: Double = 0 var body: some View { VStack { Slider(value: $celsius, in: -100...100) Text("\(celsius, specifier: "%.1f") Celsius is \(celsius * 9 / 5 + 32, specifier: "%.1f") Fahrenheit") } } } ``` 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Text("You selected: \(selectedColor)") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo13/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo13/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo13/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo13/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo13/README.md ================================================ 如何创建选择器 `Picker` 并从中读取值？ === SwiftUI 的 `Picker` 视图设法将 `UIPickerView`，`UISegmentedControl` 和 `UITableView` 合并为一个，同时还可以适应其他操作系统上的其他样式。 很棒的是，我们真的不需要关心它的工作原理 – SwiftUI 在自动适应环境方面做得很好。 与大多数其他控件一样，您必须将选择器附加到某种状态，以跟踪选择器的选择。 例如，这将创建一个 `colors` 数组和一个存储选择的颜色的整数，然后将其与选择器和文本视图一起使用，以便您可以看到正在回读的值： ```swift struct ContentView: View { var colors = ["Red", "Green", "Blue", "Tartan"] @State private var selectedColor = "Red" var body: some View { VStack { Picker("Please choose a color", selection: $selectedColor) { ForEach(colors, id: \.self) { Text($0) } } Text("You selected: \(selectedColor)") } } } ``` 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DatePicker(selection: $birthDate, in: ...Date(), displayedComponents: .date) { Text("Select a date") } Text("Date is \(birthDate, formatter: dateFormatter)") Spacer() Text("Enter your birthday") .font(.largeTitle) DatePicker("Enter your birthday", selection: $date) .datePickerStyle(GraphicalDatePickerStyle()) .frame(maxHeight: 400) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo14/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo14/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo14/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo14/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo14/README.md ================================================ 如何创建日期选择器 `DatePicker` 并从中读取值？ === SwiftUI 的 `DatePicker` 视图类似于 `UIDatePicker`，并具有用于控制其外观和工作方式的各种选项。 像所有存储值的控件一样，它确实需要绑定到应用程序中的某种状态。 例如，这将创建一个绑定到 `birthDate` 属性的日期选择器，允许用户选择现在之前的任何日期，然后显示设置的日期选择器的值： ```swift struct ContentView: View { let dateFormatter: DateFormatter = { let formatter = DateFormatter() formatter.dateStyle = .long return formatter }() @State private var birthDate = Date() var body: some View { VStack { DatePicker(selection: $birthDate, in: ...Date(), displayedComponents: .date) { Text("Select a date") } Text("Date is \(birthDate, formatter: dateFormatter)") } } } ``` 您可以看到我已将 `displayComponents` 设置为 `.date`，但也可以使用 `.hourAndMinute` 来获取时间数据。 使用 `in:... Date()` 将日期范围指定为直到当前日期（包括当前日期）的所有内容，但之后不包含任何内容。 您可以使用 `in: Date()...` 进行相反的操作（即，允许从现在开始的日期），但是如果需要，也可以使用精确范围。 从 `iOS 14` 开始，您可以使用新的 `GraphicalDatePickerStyle()` 获得更高级的日期选择器，该选择器显示日历以及输入精确时间的空间： ```swift struct ContentView: View { @State private var date = Date() var body: some View { VStack { Text("Enter your birthday") .font(.largeTitle) DatePicker("Enter your birthday", selection: $date) .datePickerStyle(GraphicalDatePickerStyle()) .frame(maxHeight: 400) } } } ``` ================================================ FILE: example/user-interface-controls/demo15/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7938442604766100A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7938312604766000A87448 /* DemoApp.swift */; }; 7D7938452604766100A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo15/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var favoriteColor = 0 var body: some View { VStack { Picker(selection: $favoriteColor, label: Text("What is your favorite color?")) { Text("Red").tag(0) Text("Green").tag(1) Text("Blue").tag(2) } .pickerStyle(SegmentedPickerStyle()) Text("Value: \(favoriteColor)") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo15/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 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================================================ 如何创建分段控件并从中读取值？ === SwiftUI 的 `Picker` 也可以用来创建与 `UIKit` 中的 `UISegmentedControl` 等效的分段控件，尽管它需要绑定到某种状态，并且您必须确保为每个分段提供一个标签，以便于对其进行识别。 段可以是文本或图片； 其他任何事情都会悄无声息地失败。 例如，这将创建一个与 `favouriteColorColor` 状态属性一起使用的分段控件，并在下面添加一个文本视图，该文本视图显示所选的任何值： ```swift struct ContentView: View { @State private var favoriteColor = 0 var body: some View { VStack { Picker(selection: $favoriteColor, label: Text("What is your favorite color?")) { Text("Red").tag(0) Text("Green").tag(1) Text("Blue").tag(2) } .pickerStyle(SegmentedPickerStyle()) Text("Value: \(favoriteColor)") } } } ``` 不过，在这种情况下，最好创建一个数组来存储各种颜色，然后使用 `ForEach` 通过循环在内部创建文本视图： ```swift struct ContentView: View { @State private var favoriteColor = "Red" var colors = ["Red", "Green", "Blue"] var body: some View { VStack { Picker(selection: $favoriteColor, label: Text("What is your favorite color?")) { ForEach(colors, id: \.self) { Text($0) } } .pickerStyle(SegmentedPickerStyle()) Text("Value: 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onDecrement: { age2 -= 1 }) Text("Your age is \(age2)") } .frame(width: 300, height: 360, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo16/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo16/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo16/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo16/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo16/README.md ================================================ 如何创建步进器 `Stepper` 并从中读取值？ === SwiftUI 的 `Stepper` 控件使用户可以从我们指定的范围中选择值，并提供与 `UIKit` 中的 `UIStepper` 相同的功能。 例如，这将创建一个绑定到 `age` 属性的步进器，使用户可以选择0到130之间（包括0和130）的值： ```swift struct ContentView: View { @State private var age = 18 var body: some View { VStack { Stepper("Enter your age", value: $age, in: 0...130) Text("Your age is \(age)") } } } ``` 除了直接绑定到值之外，还可以提供自定义 `onIncrement` 和 `onDecrement` 闭包来执行自定义工作，如下所示： ```swift struct ContentView: View { @State private var age = 18 var body: some View { VStack { Stepper("Enter your age", onIncrement: 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$selectedNumber) { ForEach(0..<10) { Text("\($0)") } } Picker("Select a number", selection: $selectedNumber) { ForEach(0..<10) { Text("\($0)") } } .labelsHidden() Picker(selection: $selectedNumber, label: EmptyView()) { ForEach(0..<10) { Text("\($0)") } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo17/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo17/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo17/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo17/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo17/README.md ================================================ 如何使用 `labelsHidden()` 隐藏 `Picker`，`Stepper`，`Toggle` 等标签？ === SwiftUI 要求我们在其控件中添加标签，并且通常希望隐藏这些标签，以便获得更精确的 UI 布局。 但是，隐藏标签的方法很不好，也很不错，尽管人们积极地伤害了用户，但人们还是选择了错误的选择，这已经很普遍了。 首先，让我们看一下隐藏标签的正确方法。 举例来说，以下是一个选择器，可让用户选择一个数字： ```swift struct ContentView: View { @State private var selectedNumber = 0 var body: some View { Picker("选择数字", selection: $selectedNumber) { ForEach(0..<10) { Text("\($0)") } } } } ``` 默认情况下，它将在左侧显示 `选择数字`，在右侧（至少在iOS上）显示轮式选择器。 这看起来很糟糕，因为标签挤在一个很小的空间中–更好的主意是让 `VStack` 带有自定义文本标签，然后将标签隐藏在 `Picker` 中。 要隐藏 `Picker` 的标签-或实际上是 `DatePicker`，`Stepper`，`Toggle` 或任何其他需要标签的视图的标签 - 您应在该视图中添加 `labelsHidden()` 修饰符，如下所示： ```swift struct ContentView: View { @State private var selectedNumber = 0 var body: some View { Picker("Select a number", selection: $selectedNumber) { ForEach(0..<10) { Text("\($0)") } } .labelsHidden() } } ``` 这样仍会创建标签，但现在不会显示。 结果，您可以将 `Picker` 放入 `VStack` 并添加您自己选择的标签。 提示：如果要隐藏所有标签，则可以将 `labelsHidden()` 修饰符应用于 `VStack` 或用作外部容器的任何容器。 如果您好奇，则隐藏标签的错误方法是使用 `EmptyView`，如下所示： ```swift struct ContentView: View { @State private var selectedNumber = 0 var body: some View { Picker(selection: $selectedNumber, label: EmptyView()) { ForEach(0..<10) { Text("\($0)") } } } } ``` 是的，最终结果可能看起来一样，但是使用 `labelsHidden()` 更好的一个重要原因是：屏幕阅读器仍然可以访问隐藏的标签，因此即使文本不可见，它仍然可以帮助 `VoiceOver` 了解您的用户界面的结构。 ================================================ FILE: 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example/user-interface-controls/demo18/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo18/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo18/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo18/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo18/README.md ================================================ 如何使用文本编辑器创建多行可编辑文本 `TextEditor`？ === SwiftUI 具有用于处理多行滚动文本的 `TextEditor` 视图。 您可以设置字体，根据需要更改颜色，甚至可以调整行距以及可以创建多少行。 您需要使用 `@State` 或类似方法将文本字段的当前值存储在某个位置。 例如，我们可以创建一个文本视图，以允许用户输入个人资料数据，如下所示： ```swift struct ContentView: View { @State private var profileText: String = "Enter your bio" var body: some View { TextEditor(text: $profileText) .foregroundColor(.secondary) } } ``` 对于单行文本输入，请改用 `TextField`。 ================================================ FILE: example/user-interface-controls/demo19/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7938E82604826B00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo19/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var bgColor = Color.red var body: some View { VStack { ColorPicker("Set the background color", selection: $bgColor) } .frame(maxWidth: .infinity, maxHeight: .infinity) .background(bgColor) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo19/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo19/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo19/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo19/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo19/README.md ================================================ 如何让用户使用 `ColorPicker` 选择颜色？ === SwiftUI 具有一个本机的 `ColorPicker` 控件，该控件允许用户选择一种颜色。 要使用它，首先创建可以使用 `@State` 或类似方法更改的 `Color` 属性，然后 ```swift struct ContentView: View { @State private var bgColor = Color.red var body: some View { VStack { ColorPicker("Set the background color", selection: $bgColor) } .frame(maxWidth: .infinity, maxHeight: .infinity) .background(bgColor) } } ``` 默认情况下，`ColorPicker` 在颜色选择中支持不透明度，但是您可以使用稍微不同的初始化程序来禁用它： ```swift struct ContentView: View { @State private var bgColor = Color.red var body: some View { VStack { ColorPicker("Set the background color", selection: $bgColor, supportsOpacity: false) } .frame(maxWidth: .infinity, maxHeight: .infinity) .background(bgColor) } } ``` ================================================ FILE: example/user-interface-controls/demo2/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7936562603C00F00A87448 /* DemoApp.swift in Sources */ = {isa = 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details") { showDetails.toggle() } if showDetails { Text("You should follow me on Twitter: @twostraws") .font(.largeTitle) } Button { print("Image tapped!") } label: { Image("sunset") .frame(width: 6, height: 6, alignment: .center) } Button { print("Button pressed") } label: { Text("Press Me") .padding(20) } .contentShape(Rectangle()) } .frame(width: 460, height: 300, alignment: .leading) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo2/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo2/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo2/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo2/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo2/README.md ================================================ 如何创建可点击的按钮？ === SwiftUI 的按钮与 `UIButton` 相似，不同之处在于它在显示内容方面更加灵活，并且它对操作使用闭包，而不是旧的目标/操作系统。 要创建一个带有字符串标题的按钮，您将以如下代码开始： ```swift Button("Button title") { print("Button tapped!") } ``` 例如，您可以制作一个按钮，在点击该按钮时显示或隐藏一些详细信息： ```swift struct ContentView: View { @State private var showDetails = false var body: some View { VStack(alignment: .leading) { Button("Show details") { showDetails.toggle() } if showDetails { Text("You should follow me on Twitter: @twostraws") .font(.largeTitle) } } } } ``` 提示：在学习框架时，经典的做法是分散 `print()` 调用，以便您查看何时发生。 如果要通过按钮操作进行尝试，则应首先右键单击预览画布中的播放按钮，然后选择“调试预览”，以便您的 `print()` 调用起作用。 按钮内的标题可以是任何一种视图，因此您可以创建一个图像按钮，如下所示： ```swift struct ContentView: View { @State private var showDetails = false var body: some View { Button { print("Image tapped!") } label: { Image("sunset") } } } ``` 在需要增加按钮的可点击区域时，使用自定义标签确实很有帮助，因为您可以对标签应用填充，然后使用 `contentShape(Rectangle()))` 或类似方法使整个区域都可以被点击。 例如，这会在按钮的标签上添加 `20` 个填充点，以确保可以在比可能的位置更大的空间内轻击它： ```swift Button { print("Button pressed") } label: { Text("Press Me") .padding(20) } .contentShape(Rectangle()) ``` ================================================ FILE: example/user-interface-controls/demo20/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { 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UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo20/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo20/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo20/README.md ================================================ 如何使用 `ProgressView` 显示任务的进度？ === SwiftUI 的 `ProgressView` 可以绑定到 `Double` 以显示水平进度条。 例如，这将创建一个标题为 `Downloading` 的进度条，其显示为 `downloadAmount`，以确定进度条应有多满： ```swift struct ContentView: View { @State private var downloadAmount = 0.0 var body: some View { VStack { ProgressView("Downloading…", value: downloadAmount, total: 100) } } } ``` 实际上，您需要某种方式来实际更改该值，例如计时器，网络请求或其他用户界面。 例如，这将在几秒钟内填满进度栏： ```swift struct ContentView: View { @State private var downloadAmount = 0.0 let timer = Timer.publish(every: 0.1, on: .main, in: .common).autoconnect() var body: some View { VStack { ProgressView("Downloading…", value: downloadAmount, total: 100) } 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UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo21/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo21/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo21/README.md ================================================ 如何使用 `ProgressView` 显示不确定的进度？ === SwiftUI 的 `ProgressView` 可以在不附加任何类型的绑定的情况下创建，这将使它们变得不确定-它们将显示一个永久设置动画的微调器，而不是显示某种清晰的进度。 它所需要的只是这样的代码： ```swift struct ContentView: View { var body: some View { ProgressView("Downloading…") } } ``` ================================================ FILE: example/user-interface-controls/demo22/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7939632604845C00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7939502604845B00A87448 /* 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo22/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI import MapKit struct ContentView: View { @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275), span: MKCoordinateSpan(latitudeDelta: 0.5, longitudeDelta: 0.5)) var body: some View { Map(coordinateRegion: $region) .frame(width: 400, height: 300) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo22/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 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UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo22/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo22/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo22/README.md ================================================ 如何显示地图 `Map` 视图？ === SwiftUI 的 `Map` 使我们可以将地图嵌入到其余视图的旁边，并控制是否向用户显示，想要什么注释以及其他内容。 首先，首先创建某种状态，该状态将跟踪地图显示的坐标。 这使用了 `MKCoordinateRegion`，它以纬度/经度对为地图中心，加上一个坐标跨度来控制可见量。 例如，这将创建一个以伦敦市为中心的地图： ```swift import MapKit struct ContentView: View { @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275), span: MKCoordinateSpan(latitudeDelta: 0.5, longitudeDelta: 0.5)) var body: some View { Map(coordinateRegion: $region) .frame(width: 400, height: 300) } } ``` 提示：您必须导入 `MapKit` 才能获得此功能。 当用户滚动时，区域(region)状态将自动更新。 如果需要，可以通过为地图提供单独的 `interactModes` 参数来限制用户对地图的控制权。 例如，如果您希望地图始终显示完全相同的位置，则可以使用以下方法： ```swift Map(coordinateRegion: .constant(MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275), span: MKCoordinateSpan(latitudeDelta: 0.5, longitudeDelta: 0.5))), interactionModes: []) .frame(width: 400, height: 300) ``` 或者，如果您希望用户能够放大和缩小，但不能平移到新位置，则可以使用以下方式：`[.zoom]` 用于交互方式。 最后，您可以通过为 `showsUserLocation` 和 `userTrackingMode` 提供值来要求地图显示用户的位置，甚至跟随他们的移动。 例如，这将在地图上向用户显示并始终将地图保持在其位置的中心： ```swift struct ContentView: View { @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275), span: MKCoordinateSpan(latitudeDelta: 0.5, longitudeDelta: 0.5)) var body: some View { Map(coordinateRegion: $region, showsUserLocation: true, userTrackingMode: .constant(.follow)) .frame(width: 400, height: 300) } } ``` ================================================ FILE: example/user-interface-controls/demo23/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D79398C260486BB00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D793979260486BA00A87448 /* DemoApp.swift */; }; 7D79398D260486BB00A87448 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo23/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI import MapKit struct City: Identifiable { let id = UUID() let name: String let coordinate: CLLocationCoordinate2D } struct ContentView: View { @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275), span: MKCoordinateSpan(latitudeDelta: 10, longitudeDelta: 10)) let annotations = [ City(name: "London", coordinate: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275)), City(name: "Paris", coordinate: CLLocationCoordinate2D(latitude: 48.8567, longitude: 2.3508)), City(name: "Rome", coordinate: CLLocationCoordinate2D(latitude: 41.9, longitude: 12.5)), City(name: "Washington DC", coordinate: CLLocationCoordinate2D(latitude: 38.895111, longitude: -77.036667)) ] var body: some View { Map(coordinateRegion: $region, annotationItems: annotations) { MapPin(coordinate: $0.coordinate) } .frame(width: 400, height: 300) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo23/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo23/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo23/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo23/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo23/README.md ================================================ 如何在地图 `Map` 视图中显示注释？ === SwiftUI 的 `Map` 视图使我们能够在地图顶部显示注释视图，包括默认标记和图钉，以及完全自定义的视图。 这需要三个步骤： 1. 使用 `MKCoordinateRegion` 跟踪地图的中心和缩放级别，以创建某种状态来跟踪地图显示的坐标。 2. 准备一个位置数组以用于注释。 3. 确定您希望它们在地图上显示的方式。 您可以显示内置的 `MapPin` 和 `MapMarker` 批注，也可以使用自己的视图。 无论您拥有什么位置，您所使用的类型都必须符合 `Identifiable`，因此 `SwiftUI` 可以理解如何唯一地标识每个项目。 例如，您可能会使用以下内容： ```swift struct Location: Identifiable { let id = UUID() let name: String let coordinate: CLLocationCoordinate2D } ``` 如果您只有 `CLLocationCoordinate2D` 数据，则可以通过添加以下扩展名直接使用它们： ```swift extension CLLocationCoordinate2D: Identifiable { public var id: String { "\(latitude)-\(longitude)" } } ``` 无论如何，这是一个将所有内容放在一起的示例，因此您可以看到各个省会城市的地图图钉： ```swift struct City: Identifiable { let id = UUID() let name: String let coordinate: CLLocationCoordinate2D } struct ContentView: View { @State private var region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275), span: MKCoordinateSpan(latitudeDelta: 10, longitudeDelta: 10)) let annotations = [ City(name: "London", coordinate: CLLocationCoordinate2D(latitude: 51.507222, longitude: -0.1275)), City(name: "Paris", coordinate: CLLocationCoordinate2D(latitude: 48.8567, longitude: 2.3508)), City(name: "Rome", coordinate: CLLocationCoordinate2D(latitude: 41.9, longitude: 12.5)), City(name: "Washington DC", coordinate: CLLocationCoordinate2D(latitude: 38.895111, longitude: -77.036667)) ] var body: some View { Map(coordinateRegion: $region, annotationItems: annotations) { MapPin(coordinate: $0.coordinate) } .frame(width: 400, height: 300) } } ``` 它使用了 `iOS` 多年的传统图钉样式，但是如果您想要更大的图钉样式，则可以改用 `MapMarker`，如下所示： `MapMarker(coordinate: $0.coordinate)` 而且，如果要完全控制，还可以传递完全自定义的视图-一些文本，图像，`NavigationLink` 等。 例如，我们可以在我们的首都绘制一个四点画的圆圈，如下所示： ```swift MapAnnotation(coordinate: $0.coordinate) { Circle() .strokeBorder(Color.red, lineWidth: 4) .frame(width: 40, height: 40) } ``` ================================================ FILE: example/user-interface-controls/demo24/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7939B5260487EB00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7939A2260487EA00A87448 /* DemoApp.swift */; }; 7D7939B6260487EB00A87448 /* DemoApp.swift in Sources */ = {isa = 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Link("Visit Apple", destination: URL(string: "https://www.apple.com")!) .font(.title) .foregroundColor(.red) Button("Visit Apple") { openURL(URL(string: "https://www.apple.com")!) } Link(destination: URL(string: "https://www.apple.com")!) { Image(systemName: "link.circle.fill") .font(.largeTitle) } } .frame(width: 350, height: 300, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo24/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo24/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion 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$(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo24/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo24/README.md ================================================ 如何在 `Safari` 中打开 Web 链接？ === SwiftUI为我们提供了专用的 `Link` 视图，该视图看起来像一个按钮，但是在按下时会在 `Safari` 中打开一个 `URL`。 它非常易于使用-只需为其按钮标题加上要显示的目标 `URL`，如下所示： ```swift Link("Learn SwiftUI", destination: URL(string: "https://www.apple.com")!) ``` 由于它只是文本链接，因此可以使用字体，颜色等进行自定义： ```swift Link("Visit Apple", destination: URL(string: "https://www.apple.com")!) .font(.title) .foregroundColor(.red) ``` 而且，如果您想创建自己的视图而不是仅使用文本，也可以这样做： ```swift Link(destination: URL(string: "https://www.apple.com")!) { Image(systemName: "link.circle.fill") .font(.largeTitle) } ``` 或者，您可以使用 `openURL` 环境键从代码中打开 `URL`，如下所示： ```swift struct ContentView: View { @Environment(\.openURL) var openURL var body: some View { Button("Visit Apple") { openURL(URL(string: "https://www.apple.com")!) } } } ``` ================================================ FILE: example/user-interface-controls/demo25/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D45C0132613818E003D6E88 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D45C0002613818D003D6E88 /* DemoApp.swift */; }; 7D45C0142613818E003D6E88 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo25/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/30. // import SwiftUI extension NSTextView { open override var frame: CGRect { didSet { backgroundColor = .clear drawsBackground = true } } } struct ContentView: View { @State var text = "" var body: some View { TextEditor(text: $text) .background(Color.red) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo25/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/30. // import SwiftUI @main struct DemoApp: App { var body: some Scene 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================================================ FILE: example/user-interface-controls/demo25/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo25/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo25/README.md ================================================ 如何设置可编辑文本 `TextEditor` 背景颜色？ === ```swift extension NSTextView 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ContentView.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { @State private var username = "" var body: some View { if #available(iOS 15.0, *) { TextField("Username", text: $username) .submitLabel(.join) } else { // Fallback on earlier versions } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo26/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo26/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo26/README.md ================================================ 如何自定义 `TextField`、`SecureField` 和 `TextEditor` 的提交按钮？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) 默认情况下，`TextField` 和 `SecureField` 会在键盘上显示一个简单的 `Return` 按钮，但是 `submitLabel()` 修饰符让我们可以从一系列选项中进行选择。 例如，如果您想为按钮显示 `Join` 的本地化形式，您可以使用： ```swift struct ContentView: View { @State private var username = "" var body: some View { if #available(iOS 15.0, *) { TextField("Username", text: $username) .submitLabel(.join) } else { // Fallback on earlier versions } } } ``` ![](./imgs/001.png) 通过将不同的值传递给 `submitLabel()`，您可以选择许多不同的按钮选项： - `continue` - `done` - `go` - `join` - `next` - `return` - `route` - `search` - `send` 所有这些都可以与 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"scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo27/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo27/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { @State private var password = "" var body: some View { if #available(iOS 15.0, *) { SecureField("Password", text: $password) .onSubmit { print("Authenticating…") } } else { // Fallback on earlier versions } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo27/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo27/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo27/README.md ================================================ 当用户提交 TextField 时如何执行事件？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) SwiftUI 有一个 `onSubmit()` 修饰符，可以附加到层次结构中的任何视图，并在用户完成将文本输入到 `TextField` 或 `SecureField` 时运行您选择的函数。 例如，我们可以要求用户输入他们的密码，然后在他们按下回车键时运行一些代码： ```swift struct ContentView: View { @State private var password = "" var body: some View { if #available(iOS 15.0, *) { SecureField("Password", text: $password) .onSubmit { print("Authenticating…") } } else { // Fallback on earlier versions } } } ``` ![](./imgs/001.gif) 对于这样的简单示例，`TextField` 和 `SecureField` 都接受专用的 `onCommit` 参数，我们可以在其中直接将我们的函数附加到它们。 但是，使用 `onSubmit()` 的优势在于它可以捕获在其上下文中提交的所有文本值，这使得填写表单更加容易： ```swift struct ContentView: View { @State private var username = "" @State private var password = "" var body: some View { Form { TextField("Username", text: $username) SecureField("Password", text: $password) } .onSubmit { guard username.isEmpty == false && password.isEmpty == false else { return } print("Authenticating…") } } } ``` ================================================ FILE: example/user-interface-controls/demo28/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 55; objects = { /* Begin PBXBuildFile section */ 7D35412027206250002D62E6 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3541102720624D002D62E6 /* DemoApp.swift */; }; 7D35412127206250002D62E6 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3541102720624D002D62E6 /* DemoApp.swift */; }; 7D35412227206250002D62E6 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3541112720624D002D62E6 /* ContentView.swift */; }; 7D35412327206250002D62E6 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D3541112720624D002D62E6 /* ContentView.swift */; }; 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var body: some View { if #available(iOS 15.0, *) { Button("Buy: $0.99") { print("Buying…") } .buttonStyle(.bordered) .padding(.bottom, 50) Button("Buy: $0.99") { print("Buying for $0.99") } .buttonStyle(.borderedProminent) .padding(.bottom, 50) Button("Submit") { print("Submitting…") } .tint(.indigo) .buttonStyle(.borderedProminent) .padding(.bottom, 50) Button("Delete", role: .destructive) { print("Deleting…") } .buttonStyle(.borderedProminent) } else { // Fallback on earlier versions } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo28/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo28/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo28/README.md ================================================ 如何获得突出的边框按钮？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) `SwiftUI` 具有专用的 `.bordered` 按钮样式，模仿了许多 `Apple` 应用程序中使用的常见外观和感觉。 在最基本的形式中，它看起来像这样： ```swift Button("Buy: $0.99") { print("Buying…") } .buttonStyle(.bordered) ``` ![](./imgs/001.png) 但是，对于应该在屏幕上真正突出的按钮，您可能希望使用 `borderedProminent` 选项使它们的颜色更浓： ```swift Button("Buy: $0.99") { print("Buying for $0.99") } .buttonStyle(.borderedProminent) ``` ![](./imgs/002.png) 重要提示：有很多突出的按钮并不是好的 UI 实践。 您可以使用 `tint()` 自定义这些按钮的颜色： ```swift Button("Submit") { print("Submitting…") } .tint(.indigo) .buttonStyle(.borderedProminent) ``` ![](./imgs/003.png) 或者通过将角色附加到按钮： ```swift Button("Delete", role: .destructive) { print("Deleting…") } .buttonStyle(.borderedProminent) ``` ![](./imgs/004.png) ================================================ FILE: example/user-interface-controls/demo3/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D79367F2604351D00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D79366C2604351C00A87448 /* DemoApp.swift */; }; 7D7936802604351D00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D79366C2604351C00A87448 /* DemoApp.swift */; }; 7D7936812604351D00A87448 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D79366D2604351C00A87448 /* 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================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "cherry.png", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo3/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { var body: some View { NavigationView { // NavigationLink(destination: Text("Detail view here1")) { // Image("logo") // .renderingMode(.original) // } NavigationLink(destination: Text("Detail view here2")) { Image("logo") // .frame(width: 30, height: 30, alignment: .center) } .buttonStyle(PlainButtonStyle()) Button { // your action here } label: { Image("logo") } .buttonStyle(PlainButtonStyle()) // NavigationLink(destination: Text("Detail view here3")) { // Image("logo") // } // .buttonStyle(PlainButtonStyle()) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo3/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo3/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo3/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo3/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo3/README.md ================================================ 如何禁用 `Button` 和 `NavigationLink` 中的图像的覆盖颜色？ === 在 `iOS` 上，在 `NavigationLink` 或 `Button` 中绘制的图像几乎肯定不会像您期望的那样工作：整个图像将被覆盖为不透明的蓝色或视图中具有任何强调色的颜色。 有两种方法可以解决此问题； 选择哪种取决于您想要的行为。 首先，您可以使用 `renderingMode()` 模式修饰符来获得略有不同的结果： ```swift NavigationView { NavigationLink(destination: Text("Detail view here")) { Image("logo") .renderingMode(.original) } } ``` 或者，可以将 `buttonStyle()` 修饰符与 `PlainButtonStyle()` 一起使用，如下所示： ```swift NavigationView { NavigationLink(destination: Text("Detail view here")) { Image("logo") } .buttonStyle(PlainButtonStyle()) } ``` 或像这样的普通按钮： ```swift Button 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ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var name: String = "Tim" @State var username : String? var body: some View { VStack(alignment: .leading) { TextField("Enter your name", text: $name) .textFieldStyle(RoundedBorderTextFieldStyle()) Text("Hello, \(name)!") TextField("User Name", text: $name, onEditingChanged: { (value) in print("onEditingChanged:\(self.username ?? "3")") }) { print("onCommit:\(self.username ?? "4")") }.textFieldStyle(RoundedBorderTextFieldStyle()) } .frame(width: 360, height: 200, alignment: .leading) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo4/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo4/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo4/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo4/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo4/README.md ================================================ 如何从 `TextField` 读取文本？ === SwiftUI 的 `TextField` 视图类似于 `UIKit` 中的 `UITextField`，尽管默认情况下看起来有点不同，并且在很大程度上依赖于绑定到状态。 要创建一个，您应该传入一个占位符以在文本字段内使用，外加它应该绑定到的状态值。 例如，这将创建一个绑定到本地字符串的 `TextField`，然后在其下方放置一个文本视图，以显示您键入时文本字段的输出： ```swift struct ContentView: View { @State private var name: String = "Tim" var body: some View { VStack(alignment: .leading) { TextField("Enter your name", text: $name) Text("Hello, \(name)!") } } } ``` 运行该命令后，您应该可以在文本字段中输入文字，并在其正下方看到问候语。 使用文本字段时，有两个重要的条件。 首先，默认情况下，它们没有边框，因此您可能看不到任何东西 – 您需要在其大致位置内轻按以激活键盘。 其次，您可能会发现无法输入布局的画布预览。 如果遇到此问题，请按Cmd + R在模拟器中生成并运行代码。 ================================================ FILE: example/user-interface-controls/demo5/README.md ================================================ 如何在 `TextField` 上添加边框？ === SwiftUI 的 `TextField` 视图默认没有样式，这意味着它在屏幕上是一个空白区域。 如果这符合您想要的样式，那就太好了-您已完成。 但是，我们中的许多人都希望在文本字段周围添加边框以使其更清晰。 如果要获取 `UITextField` 常用的“四舍五入”文本字段样式，则应使用 `.textFieldStyle(RoundedBorderTextFieldStyle())` 修饰符，，如下所示： ```swift struct ContentView: View { @State private var name: String = "Tim" var body: some View { VStack(alignment: .leading) { TextField("Enter your name", text: $name) .textFieldStyle(RoundedBorderTextFieldStyle()) Text("Hello, \(name)!") } } } ``` ================================================ FILE: example/user-interface-controls/demo6/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7936D12604457F00A87448 /* 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example/user-interface-controls/demo6/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo6/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var emailAddress = "" var body: some View { TextField("请输入邮箱地址 xx@xx.com", text: $emailAddress) .textFieldStyle(RoundedBorderTextFieldStyle()) .padding() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo6/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo6/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo6/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo6/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo6/README.md ================================================ 如何将占位符添加到 `TextField`？ === SwiftUI 的 `TextField` 就像 `UITextField` 一样支持占位符文本-灰色文本，空白时显示在文本字段中，或者使用提示（“输入密码”）或显示一些示例数据。 要设置占位符文本，请将其作为文本字段的初始化程序的一部分传入，如下所示： ```swift struct ContentView: View { @State private var emailAddress = "" var body: some View { TextField("请输入邮箱地址 xx@xx.com", text: $emailAddress) .textFieldStyle(RoundedBorderTextFieldStyle()) .padding() } } ``` 当该字段为空时，它将在文本字段中显示 `请输入邮箱地址 xx@xx.com`，但是一旦用户在其中输入内容，该字段就会消失。 ================================================ FILE: example/user-interface-controls/demo7/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; classes = { }; objectVersion = 50; objects = { /* Begin PBXBuildFile section */ 7D7936FA2604508B00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7936E72604508A00A87448 /* DemoApp.swift */; }; 7D7936FB2604508B00A87448 /* DemoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 7D7936E72604508A00A87448 /* DemoApp.swift */; }; 7D7936FC2604508B00A87448 /* 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================================================ FILE: example/user-interface-controls/demo7/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/user-interface-controls/demo7/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/user-interface-controls/demo7/Demo/Shared/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo7/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", 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================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var name = "" var body: some View { TextField("Enter your name", text: $name) .disableAutocorrection(true) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo7/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo7/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo7/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo7/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo7/README.md ================================================ 如何在 `TextField` 中禁用自动更正？ === 默认情况下，SwiftUI 的 `TextField` 启用自动更正功能，这在大多数情况下都是您所需要的。 但是，如果要禁用它，可以使用 `disableAutocorrection()` 修饰符来执行此操作，如下所示： ```swift struct ContentView: View { @State private var name = "" var body: some View { TextField("Enter your name", text: $name) .disableAutocorrection(true) } } ``` 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hideKeyboard() } } } } #if canImport(UIKit) extension View { func hideKeyboard() { UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil) } } #endif struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo8/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo8/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo8/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo8/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo8/README.md ================================================ 如何关闭 `TextField` 的键盘？ === SwiftUI 的 `TextField` 会在激活后自动显示键盘，但是完成操作后很难隐藏键盘-尤其是当您将 `KeyboardType()` 修饰符与 `.numberPad`，`.decimalPad` 或 `.phonePad` 等一起使用时。 我将向您展示如何在短时间内随时隐藏键盘，但是首先我想说明一件事：SwiftUI没有内置的方法可以做到这一点–我们没有简单的修饰符 依附，所以如果您要解决这个问题，那不是因为您没有尽力而为。 要强制 SwiftUI 隐藏键盘，您需要使用以下代码： ```swift UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil) ``` 是的，这很长，但是它要求 `UIKit` 搜索所谓的响应者链（即当前正在响应用户输入的控件集合），并找到能够退出其第一响应者状态的控件。 这是一种花哨的说法，“问任何有控制权的人停止使用键盘”，在我们的情况下，这意味着当文本字段处于活动状态时，键盘将被关闭。 由于该代码不是特别容易阅读，因此您应考虑将其包装在如下扩展名中： ```swift #if canImport(UIKit) extension View { func hideKeyboard() { UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil) } } #endif ``` 现在，您可以从任何 SwiftUI 视图中编写 `hideKeyboard()`。 具体用法取决于您的代码，但以下是一个简单的示例，其中显示了一个小数点填充文本字段，并带有一个用于将其关闭的按钮： ```swift struct ContentView: View { @State private var tipAmount = "" var body: some View { VStack { TextField("Name: ", text: $tipAmount) .textFieldStyle(RoundedBorderTextFieldStyle()) .keyboardType(.decimalPad) Button("Submit") { print("Tip: \(tipAmount)") hideKeyboard() } } } } #if canImport(UIKit) extension View { func hideKeyboard() { UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil) } } #endif ``` ================================================ FILE: example/user-interface-controls/demo9/Demo/Demo.xcodeproj/project.pbxproj 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"256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo9/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/user-interface-controls/demo9/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI struct ContentView: View { @State private var score = 0 let formatter: NumberFormatter = { let formatter = NumberFormatter() formatter.numberStyle = .decimal return formatter }() var body: some View { VStack { TextField("转账金额", value: $score, formatter: formatter) .textFieldStyle(RoundedBorderTextFieldStyle()) .padding() Text("您的分数是 \(score).") } .frame(width: 368, height: 200, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/user-interface-controls/demo9/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2021/3/19. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/user-interface-controls/demo9/Demo/iOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSRequiresIPhoneOS UIApplicationSceneManifest UIApplicationSupportsMultipleScenes UIApplicationSupportsIndirectInputEvents UILaunchScreen UIRequiredDeviceCapabilities armv7 UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight ================================================ FILE: example/user-interface-controls/demo9/Demo/macOS/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIconFile CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/user-interface-controls/demo9/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/user-interface-controls/demo9/README.md ================================================ 如何格式化数字的 `TextField`？ === 您可以将格式化程序附加到 SwiftUI 的 `TextField` 上，以限制它可以包含的数据类型，但老实说，它只能做些限制。 为了演示其功能及其局限性，我们可以编写一些代码以使用户在游戏中输入得分并显示他们输入的内容。 这是通过创建一个 `NumberFormatter` 将其数据格式化为十进制数字并将其附加到绑定到整数的 `TextField` 来完成的。 这是代码： ```swift struct ContentView: View { @State private var score = 0 let formatter: NumberFormatter = { let formatter = NumberFormatter() formatter.numberStyle = .decimal return formatter }() var body: some View { VStack { TextField("转账金额", value: $score, formatter: formatter) .textFieldStyle(RoundedBorderTextFieldStyle()) .padding() Text("您的分数是 \(score).") } } } ``` 如果您尝试使用该功能，则会注意到以下几点： - 仅当用户按下 `Return` 键时，`您的分数是` 文本视图才会更新。 - 用户可以自由输入他们想要的任何类型的文本，并且仅当他们按 `Return` 键时才跳回为数字。 - 他们甚至可以输入无效的数字，例如 `12.34.56`。 如果对此感到满意 – 如果文本字段允许任何输入，并且只在用户按下 `Return` 键时验证其数字并更新其状态，那么您就可以了。 但是，如果您想修复某些问题，很快就会遇到更多问题。 例如，您可以尝试将 `.keyboardType(.decimalPad)` 修饰符附加到文本字段，以将其限制为仅数字和小数点。 但是，现在： - 用户仍然可以输入多个小数点。 - 没有返回键可以隐藏键盘或更新状态。 - 即使您尝试使用 `UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)` 强制关闭键盘，它仍然无法正常工作，因为状态不会更新 - 就像用户没有输入任何内容一样。 我希望有一个不错的解决方法，但恐怕没有 - 就是不围绕 `UITextField` 滚动您自己的包装器。 同时，您要么接受现有功能的缺点，要么使用诸如 `Stepper` 之类的替代输入机制。 ================================================ FILE: example/view-layout/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo1/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo1/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { VStack { Button { print("Button tapped") } label: { Text("Welcome") .frame(minWidth: 0, maxWidth: 200, minHeight: 0, maxHeight: 200) .font(.largeTitle) } Button { print("Button tapped") } label: { Text("Please log in") .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity) .font(.largeTitle) .foregroundColor(.white) .background(Color.red) } } .frame(width: 500, height: 100, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/view-layout/demo1/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/view-layout/demo1/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/view-layout/demo1/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/view-layout/demo1/Demo/Demo/Preview 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IDEDidComputeMac32BitWarning ================================================ FILE: example/view-layout/demo1/README.md ================================================ 如何给视图定制 `frame`？ === 默认情况下，SwiftUI 的视图仅占用所需的空间，但是如果要更改视图的大小，可以使用 `frame()` 修饰符告诉 `SwiftUI` 您想要的大小范围。 例如，您可以创建一个具有 `200x200` 可点击区域的按钮，如下所示： ```swift Button { print("Button tapped") } label: { Text("Welcome") .frame(minWidth: 0, maxWidth: 200, minHeight: 0, maxHeight: 200) .font(.largeTitle) } ``` 或者，您可以通过指定一个框架，使其最小宽度和高度为零，并为最大宽度和高度，使其无穷大，从而使文本视图填充整个屏幕（减去安全区域），如下所示： ```swift Text("Please log in") .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity) .font(.largeTitle) .foregroundColor(.white) .background(Color.red) ``` ⚠️ 注意：如果要使视图进入安全区域，请确保添加了 `ignoresSafeArea()` 修饰符。 ================================================ FILE: example/view-layout/demo2/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } 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================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo2/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { VStack { Text("SwiftUI") .padding() Text("rocks") Text("SwiftUI") .padding(.bottom) Text("SwiftUI") .padding(100) Text("SwiftUI") .padding(.bottom, 100) } .frame(width: 300, height: 650, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/view-layout/demo2/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: 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================================================ 如何使用 `padding` 来控制各个视图之间的间距？ === SwiftUI 允许我们使用 `padding()` 修饰符在视图周围设置单独的填充，从而将视图放置在距离其邻居更远的地方。 如果不使用此参数，则所有方面都会得到系统默认的填充，如下所示： ```swift VStack { Text("SwiftUI") .padding() Text("rocks") } ``` 但是，您也可以自定义要应用的填充量和位置。 因此，您可能只想将系统填充应用于一侧： ```swift Text("SwiftUI") .padding(.bottom) ``` 或者，您可能想控制对所有边应用多少填充： ```swift Text("SwiftUI") .padding(100) ``` 或者，您可以将两者结合起来，在视图的一侧添加一定数量的填充： ```swift Text("SwiftUI") .padding(.bottom, 100) ``` ================================================ FILE: example/view-layout/demo3/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo3/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", 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Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { GeometryReader { geometry in HStack(spacing: 0) { Text("Left") .font(.largeTitle) .foregroundColor(.black) .frame(width: geometry.size.width * 0.33) .background(Color.yellow) Text("Right") .font(.largeTitle) .foregroundColor(.black) .frame(width: geometry.size.width * 0.67) .background(Color.orange) } } .frame(height: 50) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/view-layout/demo3/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/view-layout/demo3/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main 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例如，如果您希望两个视图占用屏幕上可用宽度的一半，则无法使用硬编码值，因为我们无法提前知道屏幕的宽度。 为了解决这个问题，`GeometryReader` 为我们提供了一个输入值，告诉我们可用的宽度和高度，然后我们可以将其用于需要的任何计算中。 因此，如果我们有两个视图，并且我们希望其中一个占据屏幕的三分之一，而另一个占据三分之二，则可以这样写： ```swift GeometryReader { geometry in HStack(spacing: 0) { Text("Left") .font(.largeTitle) .foregroundColor(.black) .frame(width: geometry.size.width * 0.33) .background(Color.yellow) Text("Right") .font(.largeTitle) .foregroundColor(.black) .frame(width: geometry.size.width * 0.67) .background(Color.orange) } } .frame(height: 50) ``` 注意：`GeometryReader` 不考虑视图层次结构中更远的偏移量或间距，这就是为什么 `HStack` 上没有间距的原因–如果我们在其中允许间距，则视图对于可用空间会有点太大。 ================================================ FILE: example/view-layout/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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================================================ FILE: example/view-layout/demo4/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { Text("Hello World") .frame(minWidth: 100, maxWidth: .infinity, minHeight: 100, maxHeight: .infinity) .background(Color.red) .ignoresSafeArea() } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/view-layout/demo4/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/view-layout/demo4/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // 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如果您要更改此设置 – 如果您希望视图真正全屏显示，即使这意味着部分被切口或其他硬件切口所遮盖 – 则应使用 `ignoresSafeArea()` 修饰符。 例如，这将创建一个红色文本视图，要求填充所有可用空间，然后将其设置为忽略任何安全区域，以使其真正边缘到边缘。 ```swift Text("Hello World") .frame(minWidth: 100, maxWidth: .infinity, minHeight: 100, maxHeight: .infinity) .background(Color.red) .ignoresSafeArea() ``` ================================================ FILE: example/view-layout/demo5/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo5/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo5/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo5/Demo/Demo/Assets.xcassets/laser-show.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "scale" : "1x" }, { "filename" : "download.jpg", "idiom" : "universal", "scale" : "2x" }, { "idiom" : "universal", "scale" : "3x" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo5/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var tossResult: some View { if Bool.random() { return AnyView(Image("laser-show").resizable().scaledToFit()) } else { return AnyView(Text("Better luck next time").font(.title)) } } var body: some View { VStack { Text("Coin Flip") .font(.largeTitle) tossResult .frame(width: 400, height: 300) TossResult() .frame(width: 400, height: 300) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/view-layout/demo5/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/view-layout/demo5/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/view-layout/demo5/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/view-layout/demo5/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json 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================================================ FILE: example/view-layout/demo5/README.md ================================================ 如何返回不同的视图类型？ === 任何 `SwiftUI` 的 `body` 属性都可以自动返回不同的视图，这要归功于名为 `@ViewBuilder` 的特殊属性。 这是使用 `Swift` 的结果生成器系统实现的，它了解如何根据我们应用的状态显示两种不同的视图。 但是，并不是所有地方都自动具有相同的功能，这意味着您创建的任何自定义属性都必须返回相同的视图类型。 有四种方法可以解决此问题。 第一种选择是将输出包装在一个组中，这样，无论您发回图像还是文本视图，它们都将在一个组中返回： ```swift struct ContentView: View { var tossResult: some View { Group { if Bool.random() { Image("laser-show") .resizable() .scaledToFit() } else { Text("Better luck next time") .font(.title) } } .frame(width: 400, height: 300) } var body: some View { VStack { Text("Coin Flip") .font(.largeTitle) tossResult } } } ``` 第二种是使用可以返回的类型擦除包装器 `AnyView`： ```swift struct ContentView: View { var tossResult: some View { if Bool.random() { return AnyView(Image("laser-show").resizable().scaledToFit()) } else { return AnyView(Text("Better luck next time").font(.title)) } } var body: some View { VStack { Text("Coin Flip") .font(.largeTitle) tossResult .frame(width: 400, height: 300) } } } ``` 如果您还没有听说过这个概念，它会有效地迫使 `Swift` 忘记 `AnyView` 内部的特定类型，让他们看起来像是同一个人。 不过，这会降低性能，因此请不要经常使用。 尽管 `Group` 和 `AnyView` 的布局效果均相同，但在两者之间通常最好使用 `Group`，因为 `SwiftUI` 效率更高。 第三种选择是自己将 `@ViewBuilder` 属性应用于需要它的任何属性，如下所示： ```swift struct ContentView: View { @ViewBuilder var tossResult: some View { if Bool.random() { Image("laser-show") .resizable() .scaledToFit() } else { Text("Better luck next time") .font(.title) } } var body: some View { VStack { Text("Coin Flip") .font(.largeTitle) tossResult .frame(width: 400, height: 300) } } } ``` 那行得通，但是说实话，如果您发现自己想使用 `@ViewBuilder`，则应该质疑您是否试图在一个视图中放置太多内容。 第四个解决方案（大多数情况下效果最好）是将视图分解为较小的视图，然后根据需要将它们组合在一起： ```swift struct TossResult: View { var body: some View { if Bool.random() { Image("laser-show") .resizable() .scaledToFit() } else { Text("Better luck next time") .font(.title) } } } struct ContentView: View { var body: some View { VStack { Text("Coin Flip") .font(.largeTitle) TossResult() .frame(width: 400, height: 300) } } } ``` 这非常有用，有助于打破逻辑和布局，还具有使视图在应用程序中其他位置更可重用的好处。`SwiftUI` 会自动折叠您的视图层次结构，因此在拆分视图时，性能没有任何有意义的区别。 ================================================ FILE: example/view-layout/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo6/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo6/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct SimpleGameResult { let id = UUID() let score: Int } struct ContentView: View { let colors: [Color] = [.red, .green, .blue] let results = [ SimpleGameResult(score: 8), SimpleGameResult(score: 5), SimpleGameResult(score: 10) ] var body: some View { VStack(alignment: .leading) { 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7D4993AC2601EDCC00504434 /* Project object */; } ================================================ FILE: example/view-layout/demo6/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/view-layout/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/view-layout/demo6/README.md ================================================ 如何使用 `ForEach` 循环创建视图？ === 通常，您会发现要遍历序列以创建视图，而在 `SwiftUI` 中，这是使用 `ForEach` 完成的。 重要提示：很容易查看 `ForEach` 并认为它与 `Swift` 序列上的 `forEach()` 方法相同，但事实并非如此。 `SwiftUI` 中的 `ForEach` 本身就是一个视图结构，这意味着您可以根据需要直接从视图主体中返回它。 您为它提供了一组项目，还可能需要告诉 `SwiftUI` 它如何唯一地标识每个项目，以便它知道在值更改时如何更新它们。 您还向它传递了一个函数，该函数要运行以为循环中的每个项目创建一个视图。 对于范围上的简单循环，您可以将范围直接传递到 `ForEach` 中，并告诉 `Swift` 将每个数字用作项目的唯一标识符。 例如，此计数从 `10` 减少到 `1`，然后在末尾添加一条消息： ```swift VStack(alignment: .leading) { ForEach((1...10).reversed(), id: \.self) { Text("\($0)…") } Text("Ready or not, here I come!") } ``` `.id(:\.self)` 部分是必需的，以便 `SwiftUI` 可以唯一地标识数组中的每个元素–这意味着，如果添加或删除一项，`SwiftUI` 会确切知道哪一个。 您可以使用这种方法来创建任何类型的循环。 例如，此代码创建一个由三种颜色组成的数组，将它们全部循环，并使用每种颜色名称和颜色值创建文本视图： ```swift struct ContentView: View { let colors: [Color] = [.red, .green, .blue] var body: some View { VStack { ForEach(colors, id: \.self) { color in Text(color.description.capitalized) .padding() .background(color) } } } } ``` 使用 `\.self` 告诉 `Swift`，每个项目都使用其自己的值进行唯一标识。 因此，如果您有数组 `[1、2、3]` 并用 `\.self` 标识每个值，则意味着第一项具有标识符 `1`，第二个 `2` 和第三个标识符。 如果数组中有自定义类型，则应将id与类型内的任何属性一起使用，以对其进行唯一标识。 例如，您可以创建一个结构，其中id属性是UUID，这意味着它可以保证是唯一的-对于我们的目的而言是完美的。 我们可以创建一个这样的结构，然后像这样使用它： ```swift struct SimpleGameResult { let id = UUID() let score: Int } struct ContentView: View { let results = [ SimpleGameResult(score: 8), SimpleGameResult(score: 5), SimpleGameResult(score: 10) ] var body: some View { VStack { ForEach(results, id: \.id) { result in Text("Result: \(result.score)") } } } } ``` 这告诉 `SwiftUI` 它可以通过查看它们的 `id` 属性来区分 `ForEach` 内部的视图。 或者，如果您创建的结构符合 `Identifiable` 协议，则只需编写 `ForEach(results)`。 遵守该协议意味着添加一个 `id` 属性，该属性唯一地标识每个对象，在我们的例子中，我们已经拥有了它。 因此，此代码实现了相同的结果： ```swift struct IdentifiableGameResult: Identifiable { var id = UUID() var score: Int } struct ContentView: View { let results = [ IdentifiableGameResult(score: 8), IdentifiableGameResult(score: 5), IdentifiableGameResult(score: 10) ] var body: some View { VStack { ForEach(results) { result in Text("Result: \(result.score)") } } } } ``` ================================================ FILE: example/view-layout/demo7/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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Text("Knowledge is power, France is bacon.") } .font(.largeTitle) } } ``` 两个文本字符串都足够长，可以在 `iPhone` 上用两行换行，`SwiftUI` 会尝试合理调整它们的大小，以便根据其长度获得适当的空间。 我们可以使用 `layoutPriority()` 修饰符通过使两个字符串之一更重要来更改此设置。 `SwiftUI` 将计算低优先级文本视图所需的最小空间量，然后将剩余空间提供给高优先级文本，以便它可以占用所需的空间。 外观如下： ```swift struct ContentView: View { var body: some View { HStack { Text("The rain Spain falls mainly on the Spaniards.") Text("Knowledge is power, France is bacon.") .layoutPriority(1) } .font(.largeTitle) } } ``` 显然，结果取决于您使用的屏幕大小，但是优先级较高的文本视图可能不会使用其提供的所有可用空间，因此其余部分将交给优先级较低的文本视图 使用。 ================================================ FILE: example/view-layout/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo8/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo8/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { var body: some View { HStack { Text("This is a short string.") .padding() .frame(maxHeight: .infinity) .background(Color.red) Text("This is a very long string with lots and lots of text that will definitely run across multiple lines because it's just so long.") .padding() .frame(maxHeight: .infinity) .background(Color.green) } .fixedSize(horizontal: false, vertical: true) .frame(maxHeight: 200) VStack { Button("Log in") { } .foregroundColor(.white) .padding() .frame(maxWidth: .infinity) .background(Color.red) .clipShape(Capsule()) Button("Reset Password") { } .foregroundColor(.white) .padding() .frame(maxWidth: .infinity) .background(Color.red) .clipShape(Capsule()) } .fixedSize(horizontal: true, vertical: false) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/view-layout/demo8/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/view-layout/demo8/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/view-layout/demo8/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: example/view-layout/demo8/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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7D4993FE2601F20800504434 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D4993FF2601F20800504434 /* Debug */, 7D4994002601F20800504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D4993E62601F20700504434 /* Project object */; } ================================================ FILE: example/view-layout/demo8/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/view-layout/demo8/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/view-layout/demo8/README.md ================================================ 如何使两个视图具有相同的宽度或高度？ === 通过将 `frame()` 修饰符与 `fixedSize()` 结合使用，`SwiftUI` 可以轻松地创建两个相同大小的视图，而无论您想要的是相同的高度还是相同的宽度–不需要 `GeometryReader` 或类似对象。 在iOS上，关键是为要缩放的每个视图提供无限的最大高度或宽度，这将自动使其拉伸以填充所有可用空间。 然后，将 `fixedSize()` 应用于它们所在的容器，这告诉 `SwiftUI` 这些视图仅应占用它们所需的空间。 结果是 `SwiftUI` 找出了视图所需的最少空间，然后允许它们占用全部空间–不管它们包含什么，两个视图将始终匹配其大小。 这是一个示例，显示了如何使两个文本视图具有相同的高度，即使它们具有非常不同的文本长度。 多亏了 `frame()` 和 `fixedSize()` 的组合，两个文本视图的布局尺寸相同： ```swift HStack { Text("This is a short string.") .padding() .frame(maxHeight: .infinity) .background(Color.red) Text("This is a very long string with lots and lots of text that will definitely run across multiple lines because it's just so long.") .padding() .frame(maxHeight: .infinity) .background(Color.green) } .fixedSize(horizontal: false, vertical: true) .frame(maxHeight: 200) ``` 当您要使两个视图具有相同的宽度时，此方法同样适用： ```swift VStack { Button("Log in") { } .foregroundColor(.white) .padding() .frame(maxWidth: .infinity) .background(Color.red) .clipShape(Capsule()) Button("Reset Password") { } .foregroundColor(.white) .padding() .frame(maxWidth: .infinity) .background(Color.red) .clipShape(Capsule()) } .fixedSize(horizontal: true, vertical: false) ``` ================================================ FILE: example/view-layout/demo9/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/view-layout/demo9/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : "40x40" }, { "idiom" : "iphone", "scale" : "3x", "size" : "40x40" }, { "idiom" : "iphone", 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example/view-layout/demo9/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/10/20. // import SwiftUI struct ContentView: View { var body: some View { if #available(iOS 15.0, *) { HStack { Image(systemName: "clock.fill") Text("Set the time") } .font(.largeTitle.bold()) .foregroundStyle(.quaternary) .padding(.bottom, 120) HStack { Image(systemName: "clock.fill") Text("Set the time") } .font(.largeTitle.bold()) .foregroundStyle( .linearGradient( colors: [.red, .black], startPoint: .top, endPoint: .bottom ) ) } else { // Fallback on earlier versions } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/view-layout/demo9/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/10/20. // import SwiftUI @main struct 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IDEDidComputeMac32BitWarning ================================================ FILE: example/view-layout/demo9/README.md ================================================ 如何使用 foregroundStyle 提供视觉结构？ === ![Updated for Xcode 13.0](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.0&color=blue&logo=Xcode&logoColor=white) ![New in iOS 15](https://img.shields.io/static/v1?label=&message=New%20in%20iOS%2015&color=lightgrey&logo=apple) `SwiftUI` 提供了一个 [`foregroundStyle()`](https://developer.apple.com/documentation/swiftui/view/foregroundstyle(_:)) 修饰符来同时控制文本、图像和形状的样式。 在最简单的形式中，这类似于将 `foregroundColor()` 与 `.secondary` 一起使用，但它不仅解锁了更多语义颜色 - `.tertiary` 和 `.quaternary`，它还增加了对任何符合 `ShapeStyle` 的支持。 因此，这是一个使用四元样式渲染的图像和一些文本的示例，这是内容四个重要性级别中最低的： ```swift HStack { Image(systemName: "clock.fill") Text("Set the time") } .font(.largeTitle.bold()) .foregroundStyle(.quaternary) ``` ![](./imgs/001.png) 就像我说的，任何符合 `ShapeStyle` 的东西也可以使用，这意味着我们可以使用相同的修饰符用红色到黑色的线性渐变渲染我们的 `HStack`： ```swift HStack { Image(systemName: "clock.fill") Text("Set the time") } .font(.largeTitle.bold()) .foregroundStyle( .linearGradient( colors: [.red, .black], startPoint: .top, endPoint: .bottom ) ) ``` ![](./imgs/002.png) ================================================ FILE: example/working-with-static-text/demo1/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo1/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : 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that will cause the text to clip.") .lineLimit(2) .frame(width: 200) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo1/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/working-with-static-text/demo1/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/working-with-static-text/demo1/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable 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7D4990AA2600FBC300504434 /* Project object */; } ================================================ FILE: example/working-with-static-text/demo1/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/working-with-static-text/demo1/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo1/README.md ================================================ 如何使用 Text 视图创建静态标签？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 文本视图在屏幕上显示静态文本，等效于 `UIKit` 中的 `UILabel`。 从最基本的角度来看，它们看起来像这样： ```swift Text("Hello World") ``` 在内容视图的预览窗口中，您可能会看到“自动预览更新已暂停” –继续，然后按 `Resume`，让 `Swift` 开始构建代码并向您显示其外观的实时预览。 提示：您可以随时按 ⌘ + ⌥ + p 继续这些预览。 默认情况下，文本视图会根据需要自动换行，但是如果您希望限制它们可以使用的行数，则应添加 `lineLimit` 修饰符，如下所示： ```swift Text("This is some longer text that is limited to three lines maximum, so anything more than that will cause the text to clip.") .lineLimit(3) .frame(width: 200) ``` 提示：请注意 `lineLimit(3)` 在 `Text("Hello World")` 下方和右侧的放置方式。 这不是必需的，但是从长远来看，这确实使您的代码更易于阅读。 如果您在某些文本上设置了行数限制，然后为其提供的字符串太长而无法容纳在可用空间中，则 SwiftUI 将截断文本，使其以“...”结尾。 您可以调整 SwiftUI 截断文本的方式：默认是从末尾删除文本并在其中显示省略号，但是您也可以根据字符串各部分的重要性将省略号放在中间或开头。 例如，这会在中间截断您的文本： ```swift Text("This is an extremely long string of text that will never fit even the widest of iOS devices even if the user has their Dynamic Type setting as small as is possible, so in theory it should definitely demonstrate truncationMode().") .lineLimit(1) .truncationMode(.middle) ``` 无论您如何截断文本，都将看到文本视图整齐地位于主视图的中心。 这是 `SwiftUI` 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FILE: example/working-with-static-text/demo10/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo10/Demo/Shared/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo10/Demo/Shared/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "iphone", "scale" : "2x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "3x", "size" : "20x20" }, { "idiom" : "iphone", "scale" : "2x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "3x", "size" : "29x29" }, { "idiom" : "iphone", "scale" : "2x", "size" : 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"scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo10/Demo/Shared/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo10/Demo/Shared/ContentView.swift ================================================ // // ContentView.swift // Shared // // Created by 王楚江 on 2022/3/9. // import SwiftUI struct ContentView: View { var body: some View { VStack { Text("Card number") .font(.headline) Text("1234 5678 9012 3456") .privacySensitive() ContentViewRedactionReasons() } } } struct ContentViewRedactionReasons: View { @Environment(\.redactionReasons) var redactionReasons var body: some View { VStack { Text("Card number") .font(.headline) if redactionReasons.contains(.privacy) { Text("[HIDDEN]") } else { Text("1234 5678 9012 3456") } } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo10/Demo/Shared/DemoApp.swift ================================================ // // DemoApp.swift // Shared // // Created by 王楚江 on 2022/3/9. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/working-with-static-text/demo10/Demo/macOS/macOS.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/working-with-static-text/demo10/README.md ================================================ 如何使用 `privacySensitive()` 将内容标记为私有? === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) SwiftUI 允许我们将视图的某些部分标记为包含敏感信息，这实际上允许我们使用 `redaction` 更轻松地隐藏或显示它。 要在您的代码中使用此功能，首先将 `privacySensitive()` 修饰符添加到任何应隐藏的视图，然后在视图层次结构中的较高位置应用 `.redacted(reason: .privacy)` 修饰符。 例如，如果视图显示在非私有上下文中，这将隐藏用户的信用卡号： ```swift struct ContentView: View { var body: some View { VStack { Text("Card number") .font(.headline) Text("1234 5678 9012 3456") .privacySensitive() } } } ``` 默认情况下，隐私敏感上下文被灰色框遮住，但您也可以通过从环境中读取 `redaction` 原因来提供自定义布局： ```swift struct ContentView: View { @Environment(\.redactionReasons) var redactionReasons var body: some View { VStack { Text("Card number") .font(.headline) if redactionReasons.contains(.privacy) { Text("[HIDDEN]") } else { Text("1234 5678 9012 3456") } } } } ``` 有时系统会自动应用隐私 `redaction`，例如如果您的小部件出现在锁定屏幕上（当用户向左滑动时），或者如果他们将 Apple Watch 设置为始终开启并且您的应用程序是可见的——这些都是 您应该将事物标记为隐私敏感的好地方。 ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2022/3/9. // import SwiftUI struct ContentView: View { var body: some View { VStack { Text("This is regular text.") Text("* This is **bold** text, this is *italic* text, and this is ***bold, italic*** text.") Text("~~A strikethrough example~~") Text("`Monospaced works too`") Text("Visit Apple: [click here](https://apple.com)") } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2022/3/9. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo/Preview Content/Preview Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo11/Demo/Demo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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Text("* This is **bold** text, this is *italic* text, and this is ***bold, italic*** text.") Text("~~A strikethrough example~~") Text("`Monospaced works too`") Text("Visit Apple: [click here](https://apple.com)") } ``` ![](./imgs/001.png) 是的，该链接是自动可点击的。 注意：不支持图片，不支持其它 Markdown 语法。 ================================================ FILE: example/working-with-static-text/demo12/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo12/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo12/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo12/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2022/3/9. // import SwiftUI import MarkdownUI struct ContentView: View { var body: some View { VStack(spacing: 50) { Text("You can't touch this") Text("Break it down!") .textSelection(.enabled) } VStack(spacing: 50) { Text("You can't touch this") Text("Break it down!") } .textSelection(.enabled) List(0..<100) { index in Text("Row \(index)") } .textSelection(.enabled) Markdown( #""" # Heading 1 A paragraph of text. ## Heading 2 A paragraph of text. ### Heading 3 A paragraph of text. #### Heading 4 A paragraph of text. ##### Heading 5 A paragraph of text. ###### Heading 6 A paragraph of text. ## Overview SwiftUI provides views, controls, and layout structures for declaring your app’s user interface. ```swift Group { Text("SwiftUI") Text("Combine") Text("Swift System") } .font(.headline) ``` --- - From Apple Developer Documentation - From Apple Developer Documentation """#, baseURL: URL(string: "https://github.com/gonzalezreal/MarkdownUI/raw/main/") ) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo12/Demo/Demo/Demo.entitlements 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"AttributedText", "repositoryURL": "https://github.com/gonzalezreal/AttributedText", "state": { "branch": null, "revision": "2dc2d7864e0fee4b524a5850d7d7cf9a7eeda0fc", "version": "1.0.0" } }, { "package": "combine-schedulers", "repositoryURL": "https://github.com/pointfreeco/combine-schedulers", "state": { "branch": null, "revision": "4cf088c29a20f52be0f2ca54992b492c54e0076b", "version": "0.5.3" } }, { "package": "MarkdownUI", "repositoryURL": "https://github.com/gonzalezreal/MarkdownUI.git", "state": { "branch": null, "revision": "4c164300337a35d002188a83a878346819b203c0", "version": "1.1.0" } }, { "package": "NetworkImage", "repositoryURL": "https://github.com/gonzalezreal/NetworkImage", "state": { "branch": null, "revision": "f8b8ed0be39d2f4aa00a6e8d3b18a62a94eff8d8", "version": "4.0.0" } }, { "package": "SwiftCommonMark", "repositoryURL": "https://github.com/gonzalezreal/SwiftCommonMark", "state": { "branch": null, "revision": "ed252beaddecce28ea6363f800c773d6169011b8", "version": "1.0.0" } }, { "package": "xctest-dynamic-overlay", "repositoryURL": "https://github.com/pointfreeco/xctest-dynamic-overlay", "state": { "branch": null, "revision": "50a70a9d3583fe228ce672e8923010c8df2deddd", "version": "0.2.1" } } ] }, "version": 1 } ================================================ FILE: example/working-with-static-text/demo12/README.md ================================================ 如何让用户选择文本？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) Swift 的 Text 视图默认表示静态的、不可选择的文本，但您可以使用带有 `.enabled` 值的 `.textSelection()` 修饰符来更改它。 例如，这使得一些文本用户可以选择，而一些用户不能： ```swift VStack(spacing: 50) { Text("You can't touch this") Text("Break it down!") .textSelection(.enabled) } ``` ![](./imgs/001.png) ![](./imgs/002.png) 选择文本后，用户会自动获得对常规文本操作的访问权限，例如复制和共享。 然而，现在至少整个文本区域都被复制了——你没有文本选择放大镜，所以你不能只选择几个单词。 在任何类型的视图组上设置 `textSelection()` 将自动使该组内的所有文本都可选择。 例如，我们可以通过将修饰符向上移动到堆栈来使前面示例中的两个文本视图都可选择： ```swift VStack(spacing: 50) { Text("You can't touch this") Text("Break it down!") } .textSelection(.enabled) ``` 您甚至可以将 `textSelection()` 应用于列表，在这种情况下，列表中的文本行变为可选择的： ```swift List(0..<100) { index in Text("Row \(index)") } .textSelection(.enabled) ``` ![](./imgs/003.png) 提示：您需要直接按住一行中的文本，而不是其他任何地方。 ================================================ FILE: example/working-with-static-text/demo2/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo2/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo2/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo2/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Text("This is an extremely long text string that will never fit even the widest of phones without wrapping") .font(.largeTitle) .frame(width: 300) Text("The best laid plans") .foregroundColor(Color.red) Text("The best laid plans") .padding() .background(Color.red) .foregroundColor(.white) .font(.headline) Text("This is an extremely long text string that will never fit even the widest of phones without wrapping") .font(.largeTitle) .lineSpacing(50) .frame(width: 300) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo2/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: 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================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo2/README.md ================================================ 如何使用字体，颜色，行距等为文本视图设置样式？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 文本视图不仅在外观上为我们提供了可预期的广泛控制，而且还旨在与Apple核心技术（例如Dynamic Type）无缝地协同工作。 默认情况下，“Text”视图具有“正文”动态类型样式，但是您可以通过在其上调用 `.font()` 来从其他大小和权重中进行选择，如下所示： ```swift Text("This is an extremely long text string that will never fit even the widest of phones without wrapping") .font(.largeTitle) .frame(width: 300) ``` 我们可以使用 `.foregroundColor()` 修饰符控制文本的颜色，如下所示： ```swift Text("The best laid plans") .foregroundColor(Color.red) ``` 您还可以设置背景颜色，但是它使用 `.background()`，因为可以使用比纯色更高级的背景。 无论如何，要为我们的布局提供黄色背景色，我们可以添加以下内容： ```swift Text("The best laid plans") .padding() .background(Color.red) .foregroundColor(.white) .font(.headline) ``` 提示：您可能想知道为什么我们使用 `foregroundColor()` 的名称具有颜色，而 `background()` 却没有颜色。 这是因为SwiftUI允许我们根据需要为文本重新着色，但是它必须始终是简单的颜色，而您可以在背景中放置任何类型的视图-颜色，是，还可以是形状，其他一些文本等等。 还有更多选择。 例如，我们可以调整文本中的行距。 默认值为0，表示没有应用额外的行距，但是您也可以指定位置值以在行之间添加额外的行距： ```swift Text("This is an extremely long text string that will never fit even the widest of phones without wrapping") .font(.largeTitle) .lineSpacing(50) .frame(width: 300) ``` ================================================ FILE: example/working-with-static-text/demo3/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo3/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo3/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo3/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { let alignments: [TextAlignment] = [.leading, .center, .trailing] @State private var alignment = TextAlignment.leading var body: some View { VStack { Picker("Text alignment", selection: $alignment) { ForEach(alignments, id: \.self) { alignment in Text(String(describing: alignment)) } } Text("This is an extremely long text string that will never fit even the widest of phones without wrapping") .font(.largeTitle) .multilineTextAlignment(alignment) .frame(width: 300) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo3/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/working-with-static-text/demo3/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/working-with-static-text/demo3/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion $(DEVELOPMENT_LANGUAGE) CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName $(PRODUCT_NAME) CFBundlePackageType $(PRODUCT_BUNDLE_PACKAGE_TYPE) CFBundleShortVersionString 1.0 CFBundleVersion 1 LSMinimumSystemVersion $(MACOSX_DEPLOYMENT_TARGET) ================================================ FILE: 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================================================ FILE: example/working-with-static-text/demo3/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo3/README.md ================================================ 如何使用 multilineTextAlignment() 调整文本对齐方式 === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) 当 `SwiftUI` 的 “Text” 视图跨多行换行时，默认情况下它们会对齐其前沿。 如果要更改此设置，请使用 `multilineTextAlignment()` 修饰符指定其他选项，例如 `.center` 或 `.trailing`。 例如，这将使多行文本跨行居中： ```swift Text("This is an extremely long text string that will never fit even the widest of phones without wrapping") .font(.largeTitle) .multilineTextAlignment(.center) .frame(width: 300) ``` 您可以使用如下所示的选择器并排比较所有三个文本对齐方式： ```swift struct ContentView: View { let alignments: [TextAlignment] = [.leading, .center, .trailing] @State private var alignment = TextAlignment.leading var body: some View { VStack { Picker("Text alignment", selection: $alignment) { ForEach(alignments, id: \.self) { alignment in Text(String(describing: alignment)) } } Text("This is an extremely long text string that will never fit even the widest of phones without wrapping") .font(.largeTitle) .multilineTextAlignment(alignment) .frame(width: 300) } } } ``` ================================================ FILE: example/working-with-static-text/demo4/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: 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: 1 } } ================================================ FILE: example/working-with-static-text/demo4/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { static let taskDateFormat: DateFormatter = { let formatter = DateFormatter() formatter.dateStyle = .long // formatter.timeStyle = .full return formatter }() let dueDate = Date() var body: some View { Text("Task due date: \(dueDate, formatter: Self.taskDateFormat)") .frame(width: 300, height: 200, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo4/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only 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configuration list for PBXProject "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D499117260101C400504434 /* Debug */, 7D499118260101C400504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; 7D499119260101C400504434 /* Build configuration list for PBXNativeTarget "Demo" */ = { isa = XCConfigurationList; buildConfigurations = ( 7D49911A260101C400504434 /* Debug */, 7D49911B260101C400504434 /* Release */, ); defaultConfigurationIsVisible = 0; defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D499101260101C200504434 /* Project object */; } ================================================ FILE: example/working-with-static-text/demo4/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/working-with-static-text/demo4/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo4/README.md ================================================ 如何在文本视图中设置文本格式？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) `SwiftUI` 的文本视图具有一个可选的 `formatter` 参数，可让我们自定义标签内数据的显示方式。 这很重要，因为当程序中发生某些事情时，值通常会为我们更新，因此通过附加格式化程序 `SwiftUI` 可以确保我们的数据代表我们正确。 例如，这定义了一个日期格式器，并使用它来确保任务日期以人类可读的形式显示： ```swift struct ContentView: View { static let taskDateFormat: DateFormatter = { let formatter = DateFormatter() formatter.dateStyle = .long return formatter }() let dueDate = Date() var body: some View { Text("Task due date: \(dueDate, formatter: Self.taskDateFormat)") } } ``` 它将显示类似 “Task due date: March 16 2021”。 ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { @State private var amount: CGFloat = 50 var body: some View { VStack { Text("ffi") .font(.custom("AmericanTypewriter", size: 72)) .kerning(amount) Text("ffi") .font(.custom("AmericanTypewriter", size: 72)) .tracking(amount) Slider(value: $amount, in: 0...100) { Text("Adjust the amount of spacing") } } .frame(width: 400, height: 320, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo/Info.plist ================================================ CFBundleDevelopmentRegion 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XCConfigurationList section */ }; rootObject = 7D49911E2601052B00504434 /* Project object */; } ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/working-with-static-text/demo5/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo5/README.md ================================================ 如何在文字中的字母之间增加空格？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) SwiftUI 为我们提供了两个修饰符来控制文本视图内字符的间距，从而使我们可以根据需要将字母间距更紧密或更远。 这两个修饰符是 `tracking()` 和 `kerning()`：两者都增加了字母之间的间距，但是 `tracking` 会拉开连字，而 `kerning` 不会，而 `kerning` 会留下一些尾随空白，而 `tracking` 不会。 因此，这将为 “ Hello World” 增加20个跟踪点，这将使字母之间的间距相当大： ```swift Text("Hello World") .tracking(20) ``` 如果您想真正了解字距调整和跟踪有何不同，请尝试以下操作： ```swift struct ContentView: View { @State private var amount: CGFloat = 50 var body: some View { VStack { Text("ffi") .font(.custom("AmericanTypewriter", size: 72)) .kerning(amount) Text("ffi") .font(.custom("AmericanTypewriter", size: 72)) .tracking(amount) Slider(value: $amount, in: 0...100) { Text("Adjust the amount of spacing") } } } } ``` 它使用了 `American Typewriter` 中的文本字符串“ ffi”，该字符串具有连字格式，使字母组合看起来更好。 由于跟踪将连字分开，字距调整也不会分开，因此当您向上调整滑块时，第一个文本看起来更像“ f fi”，第二个文本看起来更像“ f f i”。 ================================================ FILE: example/working-with-static-text/demo6/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { 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example/working-with-static-text/demo6/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo6/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { VStack { // 只显示日期 Text(Date().addingTimeInterval(600), style: .date) // 只显示时间 Text(Date().addingTimeInterval(600), style: .time) // 显示从现在开始的相对距离，并自动更新 Text(Date().addingTimeInterval(600), style: .relative) // 制作计时器样式，自动更新 Text(Date().addingTimeInterval(600), style: .timer) } .frame(width: 500, height: 300, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: 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================================================ ================================================ FILE: example/working-with-static-text/demo6/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo6/README.md ================================================ 如何在文字检视中格式化日期？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) SwiftUI 的文本视图带有两个特定的日期格式化程序，以使日期在屏幕上看起来更好：一个用于处理单个日期，另一个用于处理日期范围。 日期范围版本实际上更简单，因为您只提供了一个封闭的日期范围，并且可以确保根据用户的区域设置对日期范围进行了适当的格式化： ```swift Text(Date()...Date().addingTimeInterval(600)) ``` 例如，可能显示 `10:30 AM-10:40AM`。 处理单个日期时，应提供一个 `style` 参数来确定日期的格式。 以下是一些选项： ```swift VStack { // 只显示日期 Text(Date().addingTimeInterval(600), style: .date) // 只显示时间 Text(Date().addingTimeInterval(600), style: .time) // 显示从现在开始的相对距离，并自动更新 Text(Date().addingTimeInterval(600), style: .relative) // 制作计时器样式，自动更新 Text(Date().addingTimeInterval(600), style: .timer) } ``` ================================================ FILE: example/working-with-static-text/demo7/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo7/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : 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name at me", text: $name) .textFieldStyle(RoundedBorderTextFieldStyle()) .textCase(.uppercase) .padding(.horizontal) .padding(10) } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: example/working-with-static-text/demo7/Demo/Demo/Demo.entitlements ================================================ com.apple.security.app-sandbox com.apple.security.files.user-selected.read-only ================================================ FILE: example/working-with-static-text/demo7/Demo/Demo/DemoApp.swift ================================================ // // DemoApp.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI @main struct DemoApp: App { var body: some Scene { WindowGroup { ContentView() } } } ================================================ FILE: example/working-with-static-text/demo7/Demo/Demo/Info.plist ================================================ 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defaultConfigurationName = Release; }; /* End XCConfigurationList section */ }; rootObject = 7D49915826010B5400504434 /* Project object */; } ================================================ FILE: example/working-with-static-text/demo7/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/working-with-static-text/demo7/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo7/README.md ================================================ 如何使用 textCase() 使 TextField 大写或小写？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) SwiftUI 的 `TextField` 视图通常允许用户以他们希望的任何大小写文本，但是如果要控制，则可以使用 `textCase()` 修饰符强制使用大写或小写文本。 例如，这要求用户输入他们的名字，并在每个字母大写： ```swift struct ContentView: View { @State private var name = "Paul" var body: some View { TextField("Shout your name at me", text: $name) .textFieldStyle(RoundedBorderTextFieldStyle()) .textCase(.uppercase) .padding(.horizontal) } } ``` ================================================ FILE: example/working-with-static-text/demo8/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo8/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo8/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo8/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/16. // import SwiftUI struct ContentView: View { var body: some View { Label("Your account", systemImage: "person.crop.circle") Label("Your account", systemImage: "person.crop.circle") .font(.title) VStack { Label("Text Only", systemImage: "heart") .font(.title) .labelStyle(TitleOnlyLabelStyle()) Label("Icon Only", systemImage: "star") .font(.title) .labelStyle(IconOnlyLabelStyle()) Label { Text("Paul Hudson") .foregroundColor(.primary) .font(.largeTitle) .padding() .background(Color.gray.opacity(0.2)) .clipShape(Capsule()) } icon: { RoundedRectangle(cornerRadius: 10) .fill(Color.blue) .frame(width: 64, height: 64) } // Label("Both", systemImage: "paperplane") // .font(.title) // .labelStyle(TitleAndIconLabelStyle()) } } } struct ContentView_Previews: PreviewProvider { static var previews: some View { ContentView() } } ================================================ FILE: 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================================================ ================================================ FILE: example/working-with-static-text/demo8/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo8/README.md ================================================ 如何使用 Label 并排显示文本和图标？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) SwiftUI 具有专用的视图类型，用于并排显示文本和图标，这对于菜单，列表等尤其有用。 要使用标签，您可以使用 SF 符号，如下所示： ```swift Label("Your account", systemImage: "person.crop.circle") ``` 或使用您自己的图像，如下所示： ```swift Label("Welcome to the app", image: "star") ``` 您可以使用 `font()` 修饰符并行缩放文本和图标，如下所示： ```swift Label("Your account", systemImage: "person.crop.circle") .font(.title) ``` 您可以使用 `TitleOnlyLabelStyle()`，`IconOnlyLabelStyle()` 和 `TitleAndIconLabelStyle()` 应用 `labelStyle()` 修饰符来控制标签的显示方式，如下所示： ```swift VStack { Label("Text Only", systemImage: "heart") .font(.title) .labelStyle(TitleOnlyLabelStyle()) Label("Icon Only", systemImage: "star") .font(.title) .labelStyle(IconOnlyLabelStyle()) Label("Both", systemImage: "paperplane") .font(.title) .labelStyle(TitleAndIconLabelStyle()) } ``` 提示：`TitleAndIconLabelStyle()` 仅在 `iOS 14.5` 中可用。 如果需要，可以为文本和图像提供完全自定义的视图，如下所示： ```swift Label { Text("Paul Hudson") .foregroundColor(.primary) .font(.largeTitle) .padding() .background(Color.gray.opacity(0.2)) .clipShape(Capsule()) } icon: { RoundedRectangle(cornerRadius: 10) .fill(Color.blue) .frame(width: 64, height: 64) } ``` ================================================ FILE: example/working-with-static-text/demo9/Demo/Demo/Assets.xcassets/AccentColor.colorset/Contents.json ================================================ { "colors" : [ { "idiom" : "universal" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo9/Demo/Demo/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "idiom" : "mac", "scale" : "1x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "2x", "size" : "16x16" }, { "idiom" : "mac", "scale" : "1x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "2x", "size" : "32x32" }, { "idiom" : "mac", "scale" : "1x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "2x", "size" : "128x128" }, { "idiom" : "mac", "scale" : "1x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "2x", "size" : "256x256" }, { "idiom" : "mac", "scale" : "1x", "size" : "512x512" }, { "idiom" : "mac", "scale" : "2x", "size" : "512x512" } ], "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo9/Demo/Demo/Assets.xcassets/Contents.json ================================================ { "info" : { "author" : "xcode", "version" : 1 } } ================================================ FILE: example/working-with-static-text/demo9/Demo/Demo/ContentView.swift ================================================ // // ContentView.swift // Demo // // Created by 王楚江 on 2021/3/17. // import SwiftUI struct ContentView: View { @Environment(\.redactionReasons) var redactionReasons let bio = "The rain in Spain falls mainly on the Spaniards" var body: some View { VStack { Text("This is placeholder text") Text("And so is this") } .font(.title) .redacted(reason: .placeholder) VStack { if redactionReasons == .placeholder { Text("Loading…") } else { Text(bio) .redacted(reason: redactionReasons) } } .frame(width: 500, height: 360, alignment: .center) } } struct ContentView_Previews: PreviewProvider { static 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FILE: example/working-with-static-text/demo9/Demo/Demo.xcodeproj/project.xcworkspace/contents.xcworkspacedata ================================================ ================================================ FILE: example/working-with-static-text/demo9/Demo/Demo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist ================================================ IDEDidComputeMac32BitWarning ================================================ FILE: example/working-with-static-text/demo9/README.md ================================================ 如何使用 redacted() 将内容标记为占位符？ === ![Updated for Xcode 13](https://img.shields.io/static/v1?label=&message=Updated%20for%20Xcode%2013.1&color=blue&logo=Xcode&logoColor=white) ![New in macOS 12](https://img.shields.io/static/v1?label=&message=New%20in%20macOS%2012&color=lightgrey&logo=apple) SwiftUI 允许我们在视图中将文本标记为占位符，这意味着它会被渲染，但会被灰色掩盖以表明它不是最终内容。 这是通过 `redacted(reason:)` 修饰符以及 `unredacted()` 修饰符提供的，您可以根据需要使用它们覆盖重写。 它在代码中的外观如下： ```swift Text("This is placeholder text") .font(.title) .redacted(reason: .placeholder) ``` 您只需在容器上使用 `redacted(reason:)`，即可一次在视图中进行多次编辑，如下所示： ```swift VStack { Text("This is placeholder text") Text("And so is this") } .font(.title) .redacted(reason: .placeholder) ``` 苹果公司表示，编辑是一个附加过程，这意味着，如果您向父母和孩子都添加编辑原因，那么它们将结合在一起。 目前只有 `.placeholder`，但是将来我们会看到像素化或类似现象吗？ 您还可以查询从环境中传入的任何编校原因，如下所示： ```swift struct ContentView: View { @Environment(\.redactionReasons) var redactionReasons let bio = "The rain in Spain falls mainly on the Spaniards" var body: some View { if redactionReasons == .placeholder { Text("Loading…") } else { Text(bio) .redacted(reason: redactionReasons) } } } ``` 提示：使用与上面所示相同的代码，`Redaction` 也可用于图像。 ================================================ FILE: idoc.chapters.yml ================================================ - quick-start/: 介绍 - quick-start/dont-panic.md: 不要惊慌！ - quick-start/what-is-swiftui.md: 什么是 SwiftUI? - quick-start/swiftui-vs-interface-builder-and-storyboards.md: SwiftUI 与 Interface Builder 和 storyboards - quick-start/frequently-asked-questions-about-swiftui.md: 有关 SwiftUI 的常见问题 - quick-start/answering-the-big-question-should-you-learn-swiftui-uikit-or-both.md: 回答这个大问题：你应该学习 SwiftUI，UIKit，还是两者都学？ - quick-start/how-to-follow-this-quick-start-guide.md: 如何遵循这个快速入门指南？ - quick-start/migrating-from-uikit-to-swiftui.md: 从 UIKit 迁移到 SwiftUI - quick-start/whats-in-the-basic-template.md: 基本模板是什么？ - quick-start/dedication.md: 贡献 # ## 建立一个完整的项目 # 通过实际的应用程序项目学习 SwiftUI - introduction/: 建立一个完整的项目 - introduction/demo1/README.md: 创建一个 `SwiftUI` 项目 - introduction/demo2/README.md: 使用列表构建菜单 # ## 使用静态文本 # 整齐地布局文本 - working-with-static-text/: 使用静态文本 - working-with-static-text/demo1/README.md: 如何使用 `Text` 视图创建静态标签？ - working-with-static-text/demo2/README.md: 如何使用字体，颜色，行距等为文本视图设置样式？ - working-with-static-text/demo3/README.md: 如何使用 `multilineTextAlignment()` 调整文本对齐方式？ - working-with-static-text/demo4/README.md: 如何在文本视图中设置文本格式？ - working-with-static-text/demo5/README.md: 如何在文字中的字母之间增加空格？ - working-with-static-text/demo6/README.md: 如何在文字检视中格式化日期？ - working-with-static-text/demo7/README.md: 如何使用 `textCase()` 使 `TextField` 大写或小写？ - working-with-static-text/demo8/README.md: 如何使用 `Label` 并排显示文本和图标？ - working-with-static-text/demo9/README.md: 如何使用 `redacted()` 将内容标记为占位符？ - working-with-static-text/demo10/README.md: 如何使用 `privacySensitive()` 将内容标记为私有? - working-with-static-text/demo11/README.md: 如何在文本中呈现 `Markdown` 内容？ - working-with-static-text/demo12/README.md: 如何让用户选择文本？ # ## 图像，形状和媒体 # 绘制图标，圆形，渐变等 - images-shapes-media/: 图像，形状和媒体 - images-shapes-media/demo1/README.md: 如何使用图像视图绘制图像？ - images-shapes-media/demo2/README.md: 如何调整图像适合其空间的展示方式？ - images-shapes-media/demo3/README.md: 如何平铺图像？ - images-shapes-media/demo4/README.md: 如何使用SF符号渲染图像？ - images-shapes-media/demo5/README.md: 如何渲染渐变？ - images-shapes-media/demo6/README.md: 如何使用图像和其他视图作为背景？ - images-shapes-media/demo7/README.md: 如何显示实体形状？ - images-shapes-media/demo8/README.md: 如何同时填充和描边形状？ - images-shapes-media/demo9/README.md: 如何使用 `trim()` 绘制实体形状的一部分？ - images-shapes-media/demo10/README.md: 什么时候应该使用 `ContainerRelativeShape`？ - images-shapes-media/demo11/README.md: 如何使用 `VideoPlayer` 播放电影？ - images-shapes-media/demo12/README.md: 如何使用 `SpriteView` 集成 `SpriteKit`？ - images-shapes-media/demo13/README.md: 如何从 URL 加载远程图像？ - images-shapes-media/demo14/README.md: 如何使用 SF Symbols 获得自定义颜色和透明度？ # ## 视图布局 # 布局大小，优先级和间距 - view-layout/: 视图布局 - view-layout/demo1/README.md: 如何给视图定制 `frame`？ - view-layout/demo2/README.md: 如何使用 `padding` 来控制各个视图之间的间距？ - view-layout/demo3/README.md: 如何使用 `GeometryReader` 提供相对大小？ - view-layout/demo4/README.md: 如何将内容放置在安全区域之外？ - view-layout/demo5/README.md: 如何返回不同的视图类型？ - view-layout/demo6/README.md: 如何使用 `ForEach` 循环创建视图？ - view-layout/demo7/README.md: 如何使用 `layoutPriority()` 控制布局优先级？ - view-layout/demo8/README.md: 如何使两个视图具有相同的宽度或高度？ - view-layout/demo9/README.md: 如何使用 `foregroundStyle()` 提供视觉结构？ # ## 堆栈，网格，滚动视图 # 以结构化方式定位视图 - stacks-grids-scrollviews/: 堆栈，网格，滚动视图 - stacks-grids-scrollviews/demo1/README.md: 如何使用 `VStack` 和 `HStack` 创建堆栈？ - stacks-grids-scrollviews/demo2/README.md: 如何使用对齐 `alignment` 和间距 `spacing` 自定义堆栈布局？ - stacks-grids-scrollviews/demo3/README.md: 如何使用 `Spacer` 将视图强制移到堆栈中的一侧？ - stacks-grids-scrollviews/demo4/README.md: 如何制作固定尺寸的 `Spacer`？ - stacks-grids-scrollviews/demo5/README.md: 如何使用 `ZStack` 在彼此之上叠加视图？ - stacks-grids-scrollviews/demo6/README.md: 如何使用 `zIndex` 更改视图分层的顺序？ - stacks-grids-scrollviews/demo7/README.md: 如何使用尺寸类创建不同的布局？ - stacks-grids-scrollviews/demo8/README.md: 如何根据大小类在 `HStack` 和 `VStack` 之间自动切换？ - stacks-grids-scrollviews/demo9/README.md: 如何使用 `ScrollView` 添加水平和垂直滚动？ - stacks-grids-scrollviews/demo10/README.md: 如何使用 `ScrollViewReader` 使滚动视图移动到某个位置？ - stacks-grids-scrollviews/demo11/README.md: 如何使用 `ScrollView` 和 `GeometryReader` 创建3D效果(如Cover Flow)？ - stacks-grids-scrollviews/demo12/README.md: 如何使用 `LazyVGrid` 和 `LazyHGrid` 在网格中放置视图？ - stacks-grids-scrollviews/demo13/README.md: 如何使用 `LazyVStack` 和 `LazyHStack` 延迟加载视图？ - stacks-grids-scrollviews/demo14/README.md: 如何使用 `HSplitViews` 创建左中右三栏布局？ - stacks-grids-scrollviews/demo15/README.md: 如何添加视觉效果模糊？ # ## 用户界面控件 # 响应交互并控制程序状态 - user-interface-controls/: 用户界面控件 - user-interface-controls/demo1/README.md: 使用状态 - user-interface-controls/demo2/README.md: 如何创建可点击的按钮？ - user-interface-controls/demo3/README.md: 如何禁用 `Button` 和 `NavigationLink` 中的图像的覆盖颜色？ - user-interface-controls/demo4/README.md: 如何从 `TextField` 读取文本？ - user-interface-controls/demo5/README.md: 如何在 `TextField` 上添加边框？ - user-interface-controls/demo6/README.md: 如何将占位符添加到 `TextField`？ - user-interface-controls/demo7/README.md: 如何在 `TextField` 中禁用自动更正？ - user-interface-controls/demo8/README.md: 如何关闭 `TextField` 的键盘？ - user-interface-controls/demo9/README.md: 如何格式化数字的 `TextField`？ - user-interface-controls/demo10/README.md: 如何使用 `SecureField` 创建安全的文本字段？ - user-interface-controls/demo11/README.md: 如何创建拨动开关？ - user-interface-controls/demo12/README.md: 如何创建滑块 `Slider` 并从中读取值？ - user-interface-controls/demo13/README.md: 如何创建选择器 `Picker` 并从中读取值？ - user-interface-controls/demo14/README.md: 如何创建日期选择器 `DatePicker` 并从中读取值？ - user-interface-controls/demo15/README.md: 如何创建分段控件并从中读取值？ - user-interface-controls/demo16/README.md: 如何创建步进器 `Stepper` 并从中读取值？ - user-interface-controls/demo17/README.md: 如何使用 `labelsHidden()` 隐藏 `Picker`，`Stepper`，`Toggle` 等标签？ - user-interface-controls/demo18/README.md: 如何使用文本编辑器创建多行可编辑文本 `TextEditor`？ - user-interface-controls/demo19/README.md: 如何让用户使用 `ColorPicker` 选择颜色？ - user-interface-controls/demo20/README.md: 如何使用 `ProgressView` 显示任务的进度？ - user-interface-controls/demo21/README.md: 如何使用 `ProgressView` 显示不确定的进度？ - user-interface-controls/demo22/README.md: 如何显示地图 `Map` 视图？ - user-interface-controls/demo23/README.md: 如何在地图 `Map` 视图中显示注释？ - user-interface-controls/demo24/README.md: 如何在 `Safari` 中打开 Web 链接？ - user-interface-controls/demo25/README.md: 如何设置可编辑文本 `TextEditor` 背景颜色？ - user-interface-controls/demo26/README.md: 如何自定义 `TextField`、`SecureField` 和 `TextEditor` 的提交按钮？ - user-interface-controls/demo27/README.md: 当用户提交 TextField 时如何执行事件？ - user-interface-controls/demo28/README.md: 如何获得突出的边框按钮？ # ## 响应事件 # 快捷方式，旋转方式和外观 - responding-to-events/: 响应事件 - responding-to-events/demo1/README.md: 如何使用 `scenePhase` 检测您的应用何时移至背景或前景？ - responding-to-events/demo2/README.md: 如何响应查看生命周期事件：`onAppear()` 和 `onDisappear()` ？ - responding-to-events/demo3/README.md: 如何使用 `keyboardShortcut()` 添加键盘快捷键？ - responding-to-events/demo4/README.md: 如何控制应用启动时显示的视图？ - responding-to-events/demo5/README.md: 应用启动时如何运行代码？ - responding-to-events/demo6/README.md: 如何将 `AppDelegate` 添加到 SwiftUI 应用？ - responding-to-events/demo7/README.md: 如何检测设备旋转？ - responding-to-events/demo8/README.md: 如何在键盘上添加工具栏？ - responding-to-events/demo9/README.md: 显示视图时如何运行异步任务？ # ## 点击和手势 # 滑动，轻击，摇动和其他输入 - taps-and-gestures/: 点击和手势 - taps-and-gestures/demo1/README.md: 如何在视图中添加手势识别器？ - taps-and-gestures/demo2/README.md: 如何阅读点击和双击手势？ - taps-and-gestures/demo3/README.md: 如何使用 `highPriorityGesture()` 强制一个手势先识别另一个手势？ - taps-and-gestures/demo4/README.md: 如何使用 `simultaneousGesture()` 同时识别两个手势？ - taps-and-gestures/demo5/README.md: 如何使用 `sequenced(before:)` 创建手势链？ - taps-and-gestures/demo6/README.md: 如何检测到用户将鼠标悬停在视图上？ - taps-and-gestures/demo7/README.md: 如何检测摇动手势？ - taps-and-gestures/demo8/README.md: 如何使用 `contentShape()` 控制视图的可点击区域？ - taps-and-gestures/demo9/README.md: 如何使用 `allowsHitTesting()` 禁用视图的点击？ # ## 状态 # 响应交互并控制程序状态 - advanced-state/: 状态 - advanced-state/demo1/README.md: "`@ObservedObject`，`@State` 和 `@EnvironmentObject` 有什么区别？" - advanced-state/demo2/README.md: 如何使用 `@StateObject` 创建和监视外部对象？ - advanced-state/demo3/README.md: 如何使用 `@ObservedObject` 管理外部对象的状态？ - advanced-state/demo4/README.md: 如何使用 `@EnvironmentObject` 在视图之间共享数据？ - advanced-state/demo5/README.md: 如何使用 `objectWillChange` 手动发送状态更新？ - advanced-state/demo6/README.md: 如何创建常量绑定？ - advanced-state/demo7/README.md: 如何创建自定义绑定？ - advanced-state/demo8/README.md: 如何在 `SwiftUI` 中使用计时器？ - advanced-state/demo9/README.md: 当使用 `onChange()` 改变状态时如何运行一些代码？ # ## 列表 # 创建数据滚动表 - lists/: 列表 - lists/demo1/README.md: 使用列表 `List` - lists/demo2/README.md: 如何创建静态物品列表？ - lists/demo3/README.md: 如何创建动态项目列表？ - lists/demo4/README.md: 如何让用户从列表中删除行？ - lists/demo5/README.md: 如何让用户在列表中移动行？ - lists/demo6/README.md: 如何将 `Section` 添加到列表？ - lists/demo7/README.md: 如何使用 `EditButton` 启用对列表的编辑？ - lists/demo8/README.md: 如何使用 `listRowBackground()` 设置列表行的背景色？ - lists/demo9/README.md: 如何创建分组和插入分组列表？ - lists/demo10/README.md: 如何创建扩展列表？ - lists/demo11/README.md: 如何滚动到列表中的特定行？ - lists/demo12/README.md: 如何允许列表中的行选择？ - lists/demo13/README.md: 如何使用隐式堆栈？ # ## 表单 # 快速有效地获得用户输入 - forms/: 表单 - forms/demo1/README.md: 使用表单 `Form` - forms/demo2/README.md: 基本表单设计 - forms/demo3/README.md: 将表单分为几个部分 - forms/demo4/README.md: 表单选择器 `Pickers` - forms/demo5/README.md: 启用和禁用表单中的元素 - forms/demo6/README.md: 显示和隐藏表单行 # ## 容器 # 将视图放置在导航控制器等中 - containers/: 容器 - containers/demo1/README.md: 使用容器 - containers/demo2/README.md: 如何在导航视图中嵌入视图？ - containers/demo3/README.md: 如何将栏项目添加到导航视图？ - containers/demo4/README.md: 如何使用 `TabView` 将视图嵌入选项卡栏中？ - containers/demo5/README.md: 如何使用 `tabViewStyle()` 创建内容的滚动页面？ - containers/demo6/README.md: 如何将视图组合 `Group` 在一起？ - containers/demo7/README.md: 如何隐藏和显示状态栏？ - containers/demo8/README.md: 如何使用 `DisclosureGroup` 隐藏和显示内容？ - containers/demo9/README.md: 如何创建工具栏并向其中添加按钮？ - containers/demo10/README.md: 如何为 `iPadOS` 添加侧边栏？ - containers/demo11/README.md: 如何隐藏和显示 `NavigationView` 侧边栏？ # ## 对话框和菜单 # 发生某些情况时显示模式通知 - alerts-and-menus/: 对话框和菜单 - alerts-and-menus/demo1/README.md: 使用简介 - alerts-and-menus/demo2/README.md: 如何显示 `alert`？ - alerts-and-menus/demo3/README.md: 如何为 `alert` 按钮添加动作？ - alerts-and-menus/demo4/README.md: 如何在单个视图中显示多个 `alert`？ - alerts-and-menus/demo5/README.md: 如何显示动作面板？ - alerts-and-menus/demo6/README.md: 如何显示上下文菜单？ - alerts-and-menus/demo7/README.md: 如何使用 `appStoreOverlay()` 推荐另一个应用程序？ - alerts-and-menus/demo8/README.md: 按下按钮时如何显示菜单？ - alerts-and-menus/demo9/README.md: 如何让用户从菜单中选择选项？ - alerts-and-menus/demo10/README.md: 如何更改 macOS 应用中主菜单？ - alerts-and-menus/demo11/README.md: 如何添加偏好设置界面？ # ## 切换界面 # 将您的用户从一个视图移动到另一个视图 - presenting-views/: 切换界面 - presenting-views/demo1/README.md: 如何将新视图推送到 `NavigationView` 上？ - presenting-views/demo2/README.md: 点击列表行时如何推送新视图？ - presenting-views/demo3/README.md: 如何在 `SwiftUI` 中使用程序化导航？ - presenting-views/demo4/README.md: 如何使用 `sheets` 呈现新视图？ - presenting-views/demo5/README.md: 如何使视图自行关闭？ - presenting-views/demo6/README.md: 如何显示弹出视图？ # ## 转换视图 # 剪辑，大小，比例，旋转等 - transforming-views/: 转换视图 - transforming-views/demo1/README.md: 如何使用其偏移量调整视图的位置 `offset`？ - transforming-views/demo2/README.md: 如何为视图周围的填充着色？ - transforming-views/demo3/README.md: 如何堆叠修改器以创建更高级的效果？ - transforming-views/demo4/README.md: 如何在视图周围绘制边框？ - transforming-views/demo5/README.md: 如何在视图内绘制边框？ - transforming-views/demo6/README.md: 如何创建行军蚂蚁边框动画效果？ - transforming-views/demo7/README.md: 如何在视图周围绘制阴影？ - transforming-views/demo8/README.md: 如何裁剪视图，以便仅部分可见？ - transforming-views/demo9/README.md: 如何旋转视图？ - transforming-views/demo10/README.md: 如何旋转 3D 视图？ - transforming-views/demo11/README.md: 如何放大或缩小视图？ - transforming-views/demo12/README.md: 如何圆角化一个视图？ - transforming-views/demo13/README.md: 如何调整视图的不透明度？ - transforming-views/demo14/README.md: 如何调整视图的强调色？ - transforming-views/demo15/README.md: 如何用一个视图掩盖另一个视图？ - transforming-views/demo16/README.md: 如何模糊视图？ - transforming-views/demo17/README.md: 如何将视图融合在一起？ - transforming-views/demo18/README.md: 如何通过着色，去饱和等来调整视图？ - transforming-views/demo19/README.md: 使用 `ButtonStyle` 自定义按钮 - transforming-views/demo20/README.md: 使用 `ProgressViewStyle` 自定义 `ProgressView` - transforming-views/demo21/README.md: 使用 `ToggleStyle` 自定义 `Toggle` - transforming-views/demo22/README.md: 如何更改 `List` `TextEditor` 等的背景色 # ## 绘画 # 使用自定义形状控制渲染 - drawing/: 绘画 - drawing/demo1/README.md: SwiftUI 的内置形状 - drawing/demo2/README.md: 如何绘制自定义路径？ - drawing/demo3/README.md: 如何绘制多边形和星星？ - drawing/demo4/README.md: 如何画一个棋盘？ # ## 动画 # 通过运动使您的界面栩栩如生 - animation/: 动画 - animation/demo1/README.md: 如何创建基本动画？ - animation/demo2/README.md: 如何制作弹簧动画？ - animation/demo3/README.md: 如何为绑定值的变化制作动画？ - animation/demo4/README.md: 如何创建显式动画？ - animation/demo5/README.md: 如何延迟动画？ - animation/demo6/README.md: 视图出现后如何立即启动动画？ - animation/demo7/README.md: 如何在一个视图中应用多个动画？ - animation/demo8/README.md: 如何使用 matchedGeometryEffect() 将动画从一个视图同步到另一个视图？ - animation/demo9/README.md: 如何通过过渡添加和删除视图？ - animation/demo10/README.md: 如何创建不对称过渡？ - animation/demo11/README.md: 如何创建自定义过渡？ - animation/demo12/README.md: 如何设置文字大小的动画？ - animation/demo13/README.md: 如何用事务覆盖动画？ # ## 排版视图 # 使您的UI结构更易于理解 - composing-views/: 排版视图 - composing-views/demo1/README.md: 如何创建和组合自定义视图？ - composing-views/demo2/README.md: 如何将文本视图结合在一起？ - composing-views/demo3/README.md: 如何将视图存储为属性？ - composing-views/demo4/README.md: 如何创建自定义修改程序？ - composing-views/demo5/README.md: 如何为 `SwiftUI` 包装自定义 `UIView`？ - composing-views/demo6/README.md: 如何为 `UIViewRepresentable` 结构创建修饰符？ - composing-views/demo7/README.md: 如何将图像插入文本？ # ## 跨平台 SwiftUI # 学习让您的应用在任何地方都看起来很棒 - cross-platform/: 跨平台 SwiftUI - cross-platform/demo1/README.md: 学习一次，随处应用 - cross-platform/demo2/README.md: 如何在 `macOS` 上获取半透明列表？ - cross-platform/demo3/README.md: 如何在 `watchOS` 上制作轮播列表？ - cross-platform/demo4/README.md: 如何使用 `digitalCrownRotation()` 在 `watchOS` 上读取 `Digital Crown`？ # ## 数据 # 通过 `Core Data` 集成和更多功能处理数据 - data/: 数据 - data/demo1/README.md: 在 `SwiftUI` 中使用 `Core Data` 的简介 - data/demo2/README.md: 如何配置核心数据以与 `SwiftUI` 一起使用？ - data/demo3/README.md: 如何从 `SwiftUI` 视图访问 `Core Data` 管理的对象上下文？ - data/demo4/README.md: 如何使用 `@FetchRequest` 创建核心数据获取请求？ - data/demo5/README.md: 如何使用 `predicate` 过滤核心数据获取请求？ - data/demo6/README.md: 如何从 `SwiftUI` 视图添加 `Core Data` 对象？ - data/demo7/README.md: 如何从 `SwiftUI` 视图中删除 `Core Data` 对象？ - data/demo8/README.md: 如何限制获取请求中的项目数？ - data/demo9/README.md: 如何使用 `FileDocument` 和 `DocumentGroup` 创建基于文档的应用程序？ - data/demo10/README.md: 如何使用 `fileExporter()` 导出文件？ - data/demo11/README.md: 如何在 `SwiftUI` 中继续 `NSUserActivity`？ - data/demo12/README.md: 如何使用 `LocationButton` 读取用户的位置？ # ## 辅助功能 # 如何使每个人都能使用您的应用 - accessibility/: 辅助功能 - accessibility/demo1/README.md: SwiftUI 的可访问性简介 - accessibility/demo2/README.md: 如何使用带有自定义字体的动态类型？ - accessibility/demo3/README.md: 如何检测“减少运动”辅助功能设置？ - accessibility/demo4/README.md: 如何检测暗模式？ - accessibility/demo5/README.md: 如何使用装饰性图像减少屏幕阅读器的混乱？ - accessibility/demo6/README.md: 如何在请求时减少动画？ # ## 工具 # 使用Xcode的帮助构建更好的应用程序 - tooling/: 工具 - tooling/demo1/README.md: 如何以不同的动态类型大小预览布局？ - tooling/demo2/README.md: 如何在亮(light)和黑暗(dark)模式下预览布局？ - tooling/demo3/README.md: 如何在不同的设备中预览布局？ - tooling/demo4/README.md: 如何在导航视图中预览布局? - tooling/demo5/README.md: 如何使用 `Instruments` 来配置您的 SwiftUI 代码并识 `identify` 布局？ - tooling/demo6/README.md: 如何在 `SwiftUI` 中使用 `Touch ID` 和 `Face ID`？ - tooling/demo7/README.md: 如何在 Xcode 中添加创建 `Swift` 包依赖？ - tooling/demo8/README.md: 如何以纵向或横向预览布局？ - tooling/demo9/README.md: 如何查找导致 SwiftUI 视图更新的数据更改？ # ## 附录A # 如何使用每个 SwiftUI 属性包装器 - appendix-a/: 附录A - appendix-a/demo1/README.md: 了解 Swift 和 SwiftUI 中的属性包装器 - appendix-a/demo2/README.md: 所有 SwiftUI 属性包装器都进行了解释和比较 - appendix-a/demo3/README.md: 什么是 `@State` 属性包装器？ - appendix-a/demo4/README.md: 什么是 `@StateObject` 属性包装器？ - appendix-a/demo5/README.md: 什么是 `@Published` 属性包装器？ - appendix-a/demo6/README.md: 什么是 `@ObservedObject` 属性包装器？ - appendix-a/demo7/README.md: 什么是 `@EnvironmentObject` 属性包装器？ - appendix-a/demo8/README.md: 什么是 `@Environment` 属性包装器？ - appendix-a/demo9/README.md: 什么是 `@Binding` 属性包装器？ - appendix-a/demo10/README.md: 什么是 `@GestureState` 属性包装器？ - appendix-a/demo11/README.md: 什么是 `@FetchRequest` 属性包装器？ - appendix-a/demo12/README.md: 什么是 `@AppStorage` 属性包装器？ - appendix-a/demo13/README.md: 什么是 `@SceneStorage` 属性包装器？ - appendix-a/demo14/README.md: 什么是 `@ScaledMetric` 属性包装器？ - appendix-a/demo15/README.md: 什么是 `@UIApplicationDelegateAdaptor` 属性包装器？ ================================================ FILE: idoc.yml 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