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Repository: touchlane/CampcotCollectionView
Branch: master
Commit: 0540049dad4c
Files: 38
Total size: 130.0 KB

Directory structure:
gitextract_0jr27f1c/

├── .gitignore
├── .travis.yml
├── CHANGELOG.md
├── CODEOWNERS
├── CampcotCollectionView.podspec
├── CampcotCollectionView.xcodeproj/
│   ├── project.pbxproj
│   ├── project.xcworkspace/
│   │   └── contents.xcworkspacedata
│   └── xcshareddata/
│       └── xcschemes/
│           └── CampcotCollectionView.xcscheme
├── CampcotCollectionView.xcworkspace/
│   ├── contents.xcworkspacedata
│   └── xcshareddata/
│       ├── IDEWorkspaceChecks.plist
│       └── WorkspaceSettings.xcsettings
├── Example/
│   ├── Example.xcodeproj/
│   │   ├── project.pbxproj
│   │   ├── project.xcworkspace/
│   │   │   ├── contents.xcworkspacedata
│   │   │   └── xcshareddata/
│   │   │       └── IDEWorkspaceChecks.plist
│   │   └── xcshareddata/
│   │       └── xcschemes/
│   │           └── Example.xcscheme
│   └── Source/
│       ├── AppDelegate.swift
│       ├── CustomCollectionViewCell.swift
│       ├── CustomHeaderView.swift
│       ├── Images.xcassets/
│       │   ├── AppIcon.appiconset/
│       │   │   └── Contents.json
│       │   ├── Contents.json
│       │   ├── logo.imageset/
│       │   │   └── Contents.json
│       │   └── logo_splash.imageset/
│       │       └── Contents.json
│       ├── Launch Screen.storyboard
│       ├── Main.storyboard
│       ├── StoryboardViewController.swift
│       ├── Supporting Files/
│       │   └── Info.plist
│       └── ViewController.swift
├── LICENSE
├── README.md
├── Source/
│   ├── CampcotCollectionView.swift
│   ├── CollapsedLayout.swift
│   ├── ContentSizeAdjustmentBehavior.swift
│   ├── ExpandedLayout.swift
│   └── Supporting Files/
│       ├── CampcotCollectionView.h
│       └── Info.plist
├── Tests/
│   ├── CampcotCollectionViewTests.swift
│   └── Supporting Files/
│       └── Info.plist
└── scripts/
    └── deploy.sh

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitignore
================================================
# OS X
.DS_Store

# Xcode
#
# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore

## Build generated
build/
DerivedData/

## Various settings
*.pbxuser
!default.pbxuser
*.mode1v3
!default.mode1v3
*.mode2v3
!default.mode2v3
*.perspectivev3
!default.perspectivev3
xcuserdata/

## Other
*.moved-aside
*.xccheckout
*.xcscmblueprint

## Obj-C/Swift specific
*.hmap
*.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
.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/

================================================
FILE: .travis.yml
================================================
os: osx
osx_image: xcode13.1
language: objective-c

before_deploy:
- gem install cocoapods
- pod repo add-cdn trunk 'https://cdn.cocoapods.org/'

deploy:
  provider: script
  script: ./scripts/deploy.sh
  on:
    tags: true

script:
  - set -o pipefail && xcodebuild -scheme CampcotCollectionView -workspace CampcotCollectionView.xcworkspace -sdk iphonesimulator -destination 'platform=iOS Simulator,name=iPhone 13,OS=15.0' build test | xcpretty --color
  - pod lib lint

after_success:
  - bash <(curl -s https://codecov.io/bash)


================================================
FILE: CHANGELOG.md
================================================
# Changelog for CampcotCollectionView 0.0.8
### Added
* Optional `isExpanded` parameter to `CampcotCollectionView` initializer.

# Changelog for CampcotCollectionView 0.0.7
### Fixed
* Fixed crash with storyboard implementation.

### Added
* Storyboard support.
* Properties in `Attributes Inspector` for `CampcotCollectionView`.
* Example for storyboard implementation.

# Changelog for CampcotCollectionView 0.0.6
### Added
* `contentSizeAdjustmentBehavior` property allows to manage content size calculation.

# Changelog for CampcotCollectionView 0.0.5
### Added
* Layout supports more than 2 items in row.

### Fixed
* Fixed bug with pinned header position when `contentInset.top` is bigger than section height.

# Changelog for CampcotCollectionView 0.0.4
### Changed
* Updates for Swift 5.0

# Changelog for CampcotCollectionView 0.0.2
### Added
* Example UI update.

# Changelog for CampcotCollectionView 0.0.1
### Added
* Initial setup.


================================================
FILE: CODEOWNERS
================================================
* @VadzimMarozau

================================================
FILE: CampcotCollectionView.podspec
================================================
Pod::Spec.new do |s|
  s.name             = 'CampcotCollectionView'
  s.version          = '0.0.8'
  s.summary          = 'CapmcotCollectionView is custom UICollectionView that allows to expand and collapse sections.'
  s.description      = 'This library provides a custom UICollectionView that allows to expand and collapse sections.'   \
                       'It provides a simple API to manage collection view appearance.'
  s.homepage         = 'https://github.com/touchlane/CampcotCollectionView'
  s.license          = { :type => 'MIT', :file => 'LICENSE' }
  s.author           = { 'Touchlane LLC' => 'tech@touchlane.com' }
  s.source           = { :git => 'https://github.com/touchlane/CampcotCollectionView.git', :tag => s.version.to_s }
  s.ios.deployment_target = '9.0'
  s.source_files = 'Source/*.swift'
  s.swift_versions = ['5.0']
end


================================================
FILE: CampcotCollectionView.xcodeproj/project.pbxproj
================================================
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================================================
FILE: CampcotCollectionView.xcodeproj/project.xcworkspace/contents.xcworkspacedata
================================================
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================================================
FILE: CampcotCollectionView.xcodeproj/xcshareddata/xcschemes/CampcotCollectionView.xcscheme
================================================
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================================================
FILE: CampcotCollectionView.xcworkspace/contents.xcworkspacedata
================================================
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================================================
FILE: CampcotCollectionView.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
================================================
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================================================
FILE: CampcotCollectionView.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
================================================
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================================================
FILE: Example/Example.xcodeproj/project.pbxproj
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				CLANG_ENABLE_OBJC_ARC = YES;
				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
				CLANG_WARN_BOOL_CONVERSION = YES;
				CLANG_WARN_COMMA = YES;
				CLANG_WARN_CONSTANT_CONVERSION = YES;
				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
				CLANG_WARN_EMPTY_BODY = YES;
				CLANG_WARN_ENUM_CONVERSION = YES;
				CLANG_WARN_INFINITE_RECURSION = YES;
				CLANG_WARN_INT_CONVERSION = YES;
				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
				CLANG_WARN_STRICT_PROTOTYPES = YES;
				CLANG_WARN_SUSPICIOUS_MOVE = YES;
				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
				CLANG_WARN_UNREACHABLE_CODE = YES;
				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
				CODE_SIGN_IDENTITY = "iPhone Developer";
				COPY_PHASE_STRIP = NO;
				DEBUG_INFORMATION_FORMAT = dwarf;
				ENABLE_STRICT_OBJC_MSGSEND = YES;
				ENABLE_TESTABILITY = YES;
				GCC_C_LANGUAGE_STANDARD = gnu11;
				GCC_DYNAMIC_NO_PIC = NO;
				GCC_NO_COMMON_BLOCKS = YES;
				GCC_OPTIMIZATION_LEVEL = 0;
				GCC_PREPROCESSOR_DEFINITIONS = (
					"DEBUG=1",
					"$(inherited)",
				);
				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
				GCC_WARN_UNDECLARED_SELECTOR = YES;
				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
				GCC_WARN_UNUSED_FUNCTION = YES;
				GCC_WARN_UNUSED_VARIABLE = YES;
				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
				MTL_ENABLE_DEBUG_INFO = YES;
				ONLY_ACTIVE_ARCH = YES;
				SDKROOT = iphoneos;
				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
			};
			name = Debug;
		};
		DD35D965201B5F390049ED03 /* Release */ = {
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			buildSettings = {
				ALWAYS_SEARCH_USER_PATHS = NO;
				CLANG_ANALYZER_NONNULL = YES;
				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
				CLANG_CXX_LIBRARY = "libc++";
				CLANG_ENABLE_MODULES = YES;
				CLANG_ENABLE_OBJC_ARC = YES;
				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
				CLANG_WARN_BOOL_CONVERSION = YES;
				CLANG_WARN_COMMA = YES;
				CLANG_WARN_CONSTANT_CONVERSION = YES;
				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
				CLANG_WARN_EMPTY_BODY = YES;
				CLANG_WARN_ENUM_CONVERSION = YES;
				CLANG_WARN_INFINITE_RECURSION = YES;
				CLANG_WARN_INT_CONVERSION = YES;
				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
				CLANG_WARN_STRICT_PROTOTYPES = YES;
				CLANG_WARN_SUSPICIOUS_MOVE = YES;
				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
				CLANG_WARN_UNREACHABLE_CODE = YES;
				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
				CODE_SIGN_IDENTITY = "iPhone Developer";
				COPY_PHASE_STRIP = NO;
				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
				ENABLE_NS_ASSERTIONS = NO;
				ENABLE_STRICT_OBJC_MSGSEND = YES;
				GCC_C_LANGUAGE_STANDARD = gnu11;
				GCC_NO_COMMON_BLOCKS = YES;
				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
				GCC_WARN_UNDECLARED_SELECTOR = YES;
				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
				GCC_WARN_UNUSED_FUNCTION = YES;
				GCC_WARN_UNUSED_VARIABLE = YES;
				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
				MTL_ENABLE_DEBUG_INFO = NO;
				SDKROOT = iphoneos;
				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
				VALIDATE_PRODUCT = YES;
			};
			name = Release;
		};
		DD35D967201B5F390049ED03 /* Debug */ = {
			isa = XCBuildConfiguration;
			buildSettings = {
				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
				CODE_SIGN_STYLE = Automatic;
				DEVELOPMENT_TEAM = NPGMYNXF85;
				INFOPLIST_FILE = "Source/Supporting Files/Info.plist";
				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
				PRODUCT_BUNDLE_IDENTIFIER = io.touchlane.Example;
				PRODUCT_NAME = "$(TARGET_NAME)";
				SWIFT_VERSION = 5.0;
				TARGETED_DEVICE_FAMILY = "1,2";
			};
			name = Debug;
		};
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			isa = XCBuildConfiguration;
			buildSettings = {
				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
				CODE_SIGN_STYLE = Automatic;
				DEVELOPMENT_TEAM = NPGMYNXF85;
				INFOPLIST_FILE = "Source/Supporting Files/Info.plist";
				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
				PRODUCT_BUNDLE_IDENTIFIER = io.touchlane.Example;
				PRODUCT_NAME = "$(TARGET_NAME)";
				SWIFT_VERSION = 5.0;
				TARGETED_DEVICE_FAMILY = "1,2";
			};
			name = Release;
		};
/* End XCBuildConfiguration section */

/* Begin XCConfigurationList section */
		DD35D94F201B5F390049ED03 /* Build configuration list for PBXProject "Example" */ = {
			isa = XCConfigurationList;
			buildConfigurations = (
				DD35D964201B5F390049ED03 /* Debug */,
				DD35D965201B5F390049ED03 /* Release */,
			);
			defaultConfigurationIsVisible = 0;
			defaultConfigurationName = Release;
		};
		DD35D966201B5F390049ED03 /* Build configuration list for PBXNativeTarget "Example" */ = {
			isa = XCConfigurationList;
			buildConfigurations = (
				DD35D967201B5F390049ED03 /* Debug */,
				DD35D968201B5F390049ED03 /* Release */,
			);
			defaultConfigurationIsVisible = 0;
			defaultConfigurationName = Release;
		};
/* End XCConfigurationList section */
	};
	rootObject = DD35D94C201B5F390049ED03 /* Project object */;
}


================================================
FILE: Example/Example.xcodeproj/project.xcworkspace/contents.xcworkspacedata
================================================
<?xml version="1.0" encoding="UTF-8"?>
<Workspace
   version = "1.0">
   <FileRef
      location = "self:Example.xcodeproj">
   </FileRef>
</Workspace>


================================================
FILE: Example/Example.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
================================================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>IDEDidComputeMac32BitWarning</key>
	<true/>
</dict>
</plist>


================================================
FILE: Example/Example.xcodeproj/xcshareddata/xcschemes/Example.xcscheme
================================================
<?xml version="1.0" encoding="UTF-8"?>
<Scheme
   LastUpgradeVersion = "1010"
   version = "1.3">
   <BuildAction
      parallelizeBuildables = "YES"
      buildImplicitDependencies = "YES">
      <BuildActionEntries>
         <BuildActionEntry
            buildForTesting = "YES"
            buildForRunning = "YES"
            buildForProfiling = "YES"
            buildForArchiving = "YES"
            buildForAnalyzing = "YES">
            <BuildableReference
               BuildableIdentifier = "primary"
               BlueprintIdentifier = "DD35D953201B5F390049ED03"
               BuildableName = "Example.app"
               BlueprintName = "Example"
               ReferencedContainer = "container:Example.xcodeproj">
            </BuildableReference>
         </BuildActionEntry>
      </BuildActionEntries>
   </BuildAction>
   <TestAction
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      shouldUseLaunchSchemeArgsEnv = "YES">
      <Testables>
      </Testables>
      <MacroExpansion>
         <BuildableReference
            BuildableIdentifier = "primary"
            BlueprintIdentifier = "DD35D953201B5F390049ED03"
            BuildableName = "Example.app"
            BlueprintName = "Example"
            ReferencedContainer = "container:Example.xcodeproj">
         </BuildableReference>
      </MacroExpansion>
      <AdditionalOptions>
      </AdditionalOptions>
   </TestAction>
   <LaunchAction
      buildConfiguration = "Debug"
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      launchStyle = "0"
      useCustomWorkingDirectory = "NO"
      ignoresPersistentStateOnLaunch = "NO"
      debugDocumentVersioning = "YES"
      debugServiceExtension = "internal"
      allowLocationSimulation = "YES">
      <BuildableProductRunnable
         runnableDebuggingMode = "0">
         <BuildableReference
            BuildableIdentifier = "primary"
            BlueprintIdentifier = "DD35D953201B5F390049ED03"
            BuildableName = "Example.app"
            BlueprintName = "Example"
            ReferencedContainer = "container:Example.xcodeproj">
         </BuildableReference>
      </BuildableProductRunnable>
      <AdditionalOptions>
      </AdditionalOptions>
   </LaunchAction>
   <ProfileAction
      buildConfiguration = "Release"
      shouldUseLaunchSchemeArgsEnv = "YES"
      savedToolIdentifier = ""
      useCustomWorkingDirectory = "NO"
      debugDocumentVersioning = "YES">
      <BuildableProductRunnable
         runnableDebuggingMode = "0">
         <BuildableReference
            BuildableIdentifier = "primary"
            BlueprintIdentifier = "DD35D953201B5F390049ED03"
            BuildableName = "Example.app"
            BlueprintName = "Example"
            ReferencedContainer = "container:Example.xcodeproj">
         </BuildableReference>
      </BuildableProductRunnable>
   </ProfileAction>
   <AnalyzeAction
      buildConfiguration = "Debug">
   </AnalyzeAction>
   <ArchiveAction
      buildConfiguration = "Release"
      revealArchiveInOrganizer = "YES">
   </ArchiveAction>
</Scheme>


================================================
FILE: Example/Source/AppDelegate.swift
================================================
//
//  AppDelegate.swift
//  Example
//
//  Created by Vadim Morozov on 1/26/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    let rootVC = ViewController()

    func application(_ application: UIApplication,
                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        self.window = UIWindow(frame: UIScreen.main.bounds)
        self.window?.rootViewController = rootVC
        self.window?.makeKeyAndVisible()
        return true
    }
}


================================================
FILE: Example/Source/CustomCollectionViewCell.swift
================================================
//
//  CustomCollectionViewCell.swift
//  Example
//
//  Created by Panda Systems on 1/8/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

import UIKit

class CustomCollectionViewCell: UICollectionViewCell {
    static let reuseIdentifier = "CustomCell"
    
    private let internalBackgroundColor = UIColor(red: 61 / 255, green: 86 / 255, blue: 166 / 255, alpha: 1)
    private let textLabel = UILabel()
    
    var text: String? {
        didSet {
            self.textLabel.text = text
        }
    }
    
    override init(frame: CGRect) {
        super.init(frame: .zero)
        self.commonInit()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.commonInit()
    }

    private func commonInit() {
        self.clipsToBounds = true
        self.backgroundColor = self.internalBackgroundColor
        self.layer.cornerRadius = 10
        self.textLabel.font = UIFont.boldSystemFont(ofSize: 24)
        self.textLabel.translatesAutoresizingMaskIntoConstraints = false
        self.textLabel.textColor = .white
        self.addSubview(self.textLabel)
        self.activateTextLabelConstraints(view: self.textLabel, anchorView: self)
    }
    
    override func apply(_ layoutAttributes: UICollectionViewLayoutAttributes) {
        super.apply(layoutAttributes)
        self.layoutIfNeeded()
    }
    
    private func activateTextLabelConstraints(view: UIView, anchorView: UIView) {
        NSLayoutConstraint.activate([
            view.centerXAnchor.constraint(equalTo: anchorView.centerXAnchor),
            view.centerYAnchor.constraint(equalTo: anchorView.centerYAnchor)
            ])
    }
}


================================================
FILE: Example/Source/CustomHeaderView.swift
================================================
//
//  CustomHeaderView.swift
//  Example
//
//  Created by Panda Systems on 1/8/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

import UIKit

protocol CustomHeaderViewDelegate: class {
    func selectSection(section: Int)
}

class CustomHeaderView: UICollectionReusableView {
    static let reuseIdentifier = "CustomHeaderView"
    private let internalBackgroundColor = UIColor.purple
    private let textLeadingOffset: CGFloat = 20
    private let textLabel = UILabel()
    
    weak var delegate: CustomHeaderViewDelegate?
    var section: Int?
    var text: String? {
        didSet {
            self.textLabel.text = text
        }
    }
    
    override init(frame: CGRect) {
        super.init(frame: .zero)
        self.commonInit()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.commonInit()
    }

    private func commonInit() {
        self.backgroundColor = self.internalBackgroundColor
        self.textLabel.translatesAutoresizingMaskIntoConstraints = false
        self.textLabel.textColor = .white
        self.textLabel.textAlignment = .center
        self.textLabel.font = UIFont.boldSystemFont(ofSize: 24)
        self.addSubview(self.textLabel)
        self.activateTextLabelConstraints(view: self.textLabel, anchorView: self)
        let tapRecognizer = UITapGestureRecognizer(target: self, action: #selector(tapOnView(sender:)))
        self.addGestureRecognizer(tapRecognizer)
    }
    
    override func prepareForReuse() {
        super.prepareForReuse()
        self.text = nil
        self.section = nil
    }
    
    override func apply(_ layoutAttributes: UICollectionViewLayoutAttributes) {
        super.apply(layoutAttributes)
        self.layoutIfNeeded()
    }
}

private typealias CustomHeaderViewPrivate = CustomHeaderView
private extension CustomHeaderViewPrivate {
    func activateTextLabelConstraints(view: UIView, anchorView: UIView) {
        NSLayoutConstraint.activate([
            view.centerXAnchor.constraint(equalTo: anchorView.centerXAnchor),
            view.centerYAnchor.constraint(equalTo: anchorView.centerYAnchor)
            ])
    }
    
    @objc func tapOnView(sender: UIGestureRecognizer) {
        guard let section = self.section else {
            return
        }
        self.delegate?.selectSection(section: section)
    }
}


================================================
FILE: Example/Source/Images.xcassets/AppIcon.appiconset/Contents.json
================================================
{
  "images" : [
    {
      "size" : "20x20",
      "idiom" : "iphone",
      "filename" : "Icon-App-20x20@2x.png",
      "scale" : "2x"
    },
    {
      "size" : "20x20",
      "idiom" : "iphone",
      "filename" : "Icon-App-20x20@3x.png",
      "scale" : "3x"
    },
    {
      "size" : "29x29",
      "idiom" : "iphone",
      "filename" : "Icon-App-29x29@2x.png",
      "scale" : "2x"
    },
    {
      "size" : "29x29",
      "idiom" : "iphone",
      "filename" : "Icon-App-29x29@3x.png",
      "scale" : "3x"
    },
    {
      "size" : "40x40",
      "idiom" : "iphone",
      "filename" : "Icon-App-40x40@2x.png",
      "scale" : "2x"
    },
    {
      "size" : "40x40",
      "idiom" : "iphone",
      "filename" : "Icon-App-40x40@3x.png",
      "scale" : "3x"
    },
    {
      "size" : "60x60",
      "idiom" : "iphone",
      "filename" : "Icon-App-60x60@2x.png",
      "scale" : "2x"
    },
    {
      "size" : "60x60",
      "idiom" : "iphone",
      "filename" : "Icon-App-60x60@3x.png",
      "scale" : "3x"
    },
    {
      "size" : "20x20",
      "idiom" : "ipad",
      "filename" : "Icon-App-20x20@1x.png",
      "scale" : "1x"
    },
    {
      "size" : "20x20",
      "idiom" : "ipad",
      "filename" : "Icon-App-20x20@2x-1.png",
      "scale" : "2x"
    },
    {
      "size" : "29x29",
      "idiom" : "ipad",
      "filename" : "Icon-App-29x29@1x.png",
      "scale" : "1x"
    },
    {
      "size" : "29x29",
      "idiom" : "ipad",
      "filename" : "Icon-App-29x29@2x-1.png",
      "scale" : "2x"
    },
    {
      "size" : "40x40",
      "idiom" : "ipad",
      "filename" : "Icon-App-40x40@1x.png",
      "scale" : "1x"
    },
    {
      "size" : "40x40",
      "idiom" : "ipad",
      "filename" : "Icon-App-40x40@2x-1.png",
      "scale" : "2x"
    },
    {
      "size" : "76x76",
      "idiom" : "ipad",
      "filename" : "Icon-App-76x76@1x.png",
      "scale" : "1x"
    },
    {
      "size" : "76x76",
      "idiom" : "ipad",
      "filename" : "Icon-App-76x76@2x.png",
      "scale" : "2x"
    },
    {
      "size" : "83.5x83.5",
      "idiom" : "ipad",
      "filename" : "Icon-App-83.5x83.5@2x.png",
      "scale" : "2x"
    },
    {
      "size" : "1024x1024",
      "idiom" : "ios-marketing",
      "filename" : "ItunesArtwork@2x.png",
      "scale" : "1x"
    },
    {
      "size" : "24x24",
      "idiom" : "watch",
      "filename" : "Icon-24@2x.png",
      "scale" : "2x",
      "role" : "notificationCenter",
      "subtype" : "38mm"
    },
    {
      "size" : "27.5x27.5",
      "idiom" : "watch",
      "filename" : "Icon-27.5@2x.png",
      "scale" : "2x",
      "role" : "notificationCenter",
      "subtype" : "42mm"
    },
    {
      "size" : "29x29",
      "idiom" : "watch",
      "filename" : "Icon-29@2x.png",
      "role" : "companionSettings",
      "scale" : "2x"
    },
    {
      "size" : "29x29",
      "idiom" : "watch",
      "filename" : "Icon-29@3x.png",
      "role" : "companionSettings",
      "scale" : "3x"
    },
    {
      "size" : "40x40",
      "idiom" : "watch",
      "filename" : "Icon-40@2x.png",
      "scale" : "2x",
      "role" : "appLauncher",
      "subtype" : "38mm"
    },
    {
      "size" : "44x44",
      "idiom" : "watch",
      "scale" : "2x",
      "role" : "appLauncher",
      "subtype" : "40mm"
    },
    {
      "size" : "50x50",
      "idiom" : "watch",
      "scale" : "2x",
      "role" : "appLauncher",
      "subtype" : "44mm"
    },
    {
      "size" : "86x86",
      "idiom" : "watch",
      "filename" : "Icon-86@2x.png",
      "scale" : "2x",
      "role" : "quickLook",
      "subtype" : "38mm"
    },
    {
      "size" : "98x98",
      "idiom" : "watch",
      "filename" : "Icon-98@2x.png",
      "scale" : "2x",
      "role" : "quickLook",
      "subtype" : "42mm"
    },
    {
      "size" : "108x108",
      "idiom" : "watch",
      "scale" : "2x",
      "role" : "quickLook",
      "subtype" : "44mm"
    },
    {
      "idiom" : "watch-marketing",
      "size" : "1024x1024",
      "scale" : "1x"
    },
    {
      "size" : "44x44",
      "idiom" : "watch",
      "filename" : "Icon-44@2x.png",
      "scale" : "2x",
      "role" : "longLook",
      "subtype" : "42mm"
    }
  ],
  "info" : {
    "version" : 1,
    "author" : "xcode"
  },
  "properties" : {
    "pre-rendered" : true
  }
}

================================================
FILE: Example/Source/Images.xcassets/Contents.json
================================================
{
  "info" : {
    "version" : 1,
    "author" : "xcode"
  }
}

================================================
FILE: Example/Source/Images.xcassets/logo.imageset/Contents.json
================================================
{
  "images" : [
    {
      "idiom" : "universal",
      "filename" : "logo.pdf",
      "scale" : "1x"
    },
    {
      "idiom" : "universal",
      "scale" : "2x"
    },
    {
      "idiom" : "universal",
      "scale" : "3x"
    }
  ],
  "info" : {
    "version" : 1,
    "author" : "xcode"
  }
}

================================================
FILE: Example/Source/Images.xcassets/logo_splash.imageset/Contents.json
================================================
{
  "images" : [
    {
      "idiom" : "universal",
      "filename" : "logo_splash.png",
      "scale" : "1x"
    },
    {
      "idiom" : "universal",
      "scale" : "2x"
    },
    {
      "idiom" : "universal",
      "scale" : "3x"
    }
  ],
  "info" : {
    "version" : 1,
    "author" : "xcode"
  }
}

================================================
FILE: Example/Source/Launch Screen.storyboard
================================================
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13771" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
    <device id="retina4_7" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13772"/>
        <capability name="Alignment constraints with different attributes" minToolsVersion="5.1"/>
        <capability name="Aspect ratio constraints" minToolsVersion="5.1"/>
        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--View Controller-->
        <scene sceneID="EHf-IW-A2E">
            <objects>
                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" image="logo_splash" translatesAutoresizingMaskIntoConstraints="NO" id="jDA-qd-c6t">
                                <rect key="frame" x="20" y="250.5" width="335" height="93"/>
                            </imageView>
                        </subviews>
                        <color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
                        <constraints>
                            <constraint firstItem="jDA-qd-c6t" firstAttribute="centerX" secondItem="Bcu-3y-fUS" secondAttribute="centerX" id="KDj-Ws-lJn"/>
                            <constraint firstItem="jDA-qd-c6t" firstAttribute="bottom" secondItem="Bcu-3y-fUS" secondAttribute="centerY" id="MZV-gS-tq4"/>
                            <constraint firstItem="Bcu-3y-fUS" firstAttribute="trailing" relation="greaterThanOrEqual" secondItem="jDA-qd-c6t" secondAttribute="trailing" constant="20" id="Ssm-rA-Wfr"/>
                            <constraint firstItem="jDA-qd-c6t" firstAttribute="leading" relation="greaterThanOrEqual" secondItem="Bcu-3y-fUS" secondAttribute="leading" constant="20" id="p15-l3-GLm"/>
                            <constraint firstItem="jDA-qd-c6t" firstAttribute="width" secondItem="jDA-qd-c6t" secondAttribute="height" multiplier="205:57" id="q5K-0n-3kS"/>
                        </constraints>
                        <viewLayoutGuide key="safeArea" id="Bcu-3y-fUS"/>
                    </view>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="53" y="375"/>
        </scene>
    </scenes>
    <resources>
        <image name="logo_splash" width="410" height="114"/>
    </resources>
</document>


================================================
FILE: Example/Source/Main.storyboard
================================================
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15705" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="50H-WV-jbO">
    <device id="retina6_1" orientation="portrait" appearance="light"/>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15706"/>
        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
        <capability name="collection view cell content view" minToolsVersion="11.0"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--Storyboard View Controller-->
        <scene sceneID="Bn2-4k-qfx">
            <objects>
                <viewController storyboardIdentifier="viewController" id="50H-WV-jbO" customClass="StoryboardViewController" customModule="Example" customModuleProvider="target" sceneMemberID="viewController">
                    <view key="view" contentMode="scaleToFill" id="p7o-vJ-Y8e">
                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
                            <collectionView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" dataMode="prototypes" translatesAutoresizingMaskIntoConstraints="NO" id="CiI-U7-IGk" customClass="CampcotCollectionView" customModule="CampcotCollectionView">
                                <rect key="frame" x="0.0" y="44" width="414" height="818"/>
                                <color key="backgroundColor" red="0.74117647058823533" green="0.76470588235294112" blue="0.7803921568627451" alpha="1" colorSpace="calibratedRGB"/>
                                <collectionViewFlowLayout key="collectionViewLayout" minimumLineSpacing="10" minimumInteritemSpacing="10" id="n55-JI-Luz">
                                    <size key="itemSize" width="72" height="72"/>
                                    <size key="headerReferenceSize" width="50" height="50"/>
                                    <size key="footerReferenceSize" width="0.0" height="0.0"/>
                                    <inset key="sectionInset" minX="0.0" minY="0.0" maxX="0.0" maxY="0.0"/>
                                </collectionViewFlowLayout>
                                <cells>
                                    <collectionViewCell opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" insetsLayoutMarginsFromSafeArea="NO" reuseIdentifier="CustomCell" id="B6o-dS-0wb" customClass="CustomCollectionViewCell" customModule="Example" customModuleProvider="target">
                                        <rect key="frame" x="0.0" y="50" width="72" height="72"/>
                                        <autoresizingMask key="autoresizingMask"/>
                                        <collectionViewCellContentView key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" insetsLayoutMarginsFromSafeArea="NO" id="mMo-R2-YRQ">
                                            <rect key="frame" x="0.0" y="0.0" width="72" height="72"/>
                                            <autoresizingMask key="autoresizingMask"/>
                                        </collectionViewCellContentView>
                                        <size key="customSize" width="72" height="72"/>
                                    </collectionViewCell>
                                </cells>
                                <collectionReusableView key="sectionHeaderView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" insetsLayoutMarginsFromSafeArea="NO" reuseIdentifier="CustomHeaderView" id="Zbe-JP-2ZF" customClass="CustomHeaderView" customModule="Example" customModuleProvider="target">
                                    <rect key="frame" x="0.0" y="0.0" width="414" height="50"/>
                                    <autoresizingMask key="autoresizingMask"/>
                                </collectionReusableView>
                                <userDefinedRuntimeAttributes>
                                    <userDefinedRuntimeAttribute type="number" keyPath="top">
                                        <real key="value" value="0.0"/>
                                    </userDefinedRuntimeAttribute>
                                    <userDefinedRuntimeAttribute type="number" keyPath="topInset">
                                        <real key="value" value="10"/>
                                    </userDefinedRuntimeAttribute>
                                    <userDefinedRuntimeAttribute type="number" keyPath="bottomInset">
                                        <real key="value" value="10"/>
                                    </userDefinedRuntimeAttribute>
                                    <userDefinedRuntimeAttribute type="number" keyPath="leftInset">
                                        <real key="value" value="10"/>
                                    </userDefinedRuntimeAttribute>
                                    <userDefinedRuntimeAttribute type="number" keyPath="rightInset">
                                        <real key="value" value="10"/>
                                    </userDefinedRuntimeAttribute>
                                    <userDefinedRuntimeAttribute type="boolean" keyPath="sectionHeadersPinToVisibleBounds" value="YES"/>
                                    <userDefinedRuntimeAttribute type="number" keyPath="minimumSectionSpacing">
                                        <real key="value" value="1"/>
                                    </userDefinedRuntimeAttribute>
                                    <userDefinedRuntimeAttribute type="number" keyPath="minimumInteritemSpacing">
                                        <real key="value" value="10"/>
                                    </userDefinedRuntimeAttribute>
                                    <userDefinedRuntimeAttribute type="number" keyPath="minimumLineSpacing">
                                        <real key="value" value="10"/>
                                    </userDefinedRuntimeAttribute>
                                </userDefinedRuntimeAttributes>
                                <connections>
                                    <outlet property="dataSource" destination="50H-WV-jbO" id="u27-tO-IDt"/>
                                    <outlet property="delegate" destination="50H-WV-jbO" id="x0f-La-Hkc"/>
                                </connections>
                            </collectionView>
                        </subviews>
                        <color key="backgroundColor" red="0.74117647060000003" green="0.76470588240000004" blue="0.78039215689999997" alpha="1" colorSpace="calibratedRGB"/>
                        <constraints>
                            <constraint firstItem="03S-Zr-mha" firstAttribute="bottom" secondItem="CiI-U7-IGk" secondAttribute="bottom" id="TNE-uS-6yy"/>
                            <constraint firstItem="03S-Zr-mha" firstAttribute="trailing" secondItem="CiI-U7-IGk" secondAttribute="trailing" id="UyL-lV-7Ce"/>
                            <constraint firstItem="CiI-U7-IGk" firstAttribute="leading" secondItem="03S-Zr-mha" secondAttribute="leading" id="ZWJ-fV-Esm"/>
                            <constraint firstItem="CiI-U7-IGk" firstAttribute="top" secondItem="03S-Zr-mha" secondAttribute="top" id="aNo-19-2P1"/>
                        </constraints>
                        <viewLayoutGuide key="safeArea" id="03S-Zr-mha"/>
                    </view>
                    <connections>
                        <outlet property="collectionView" destination="CiI-U7-IGk" id="jdf-Vd-Nl0"/>
                    </connections>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="Tcc-yi-6ep" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="-339.13043478260875" y="49.553571428571423"/>
        </scene>
    </scenes>
</document>


================================================
FILE: Example/Source/StoryboardViewController.swift
================================================
//
//  StoryboardViewController.swift
//  Example
//
//  Created by Alex Yanski on 2/7/20.
//  Copyright © 2020 Touchlane LLC. All rights reserved.
//

import UIKit
import CampcotCollectionView

class StoryboardViewController: UIViewController {

    @IBOutlet weak var collectionView: CampcotCollectionView!

    let itemsInRow = 2
    var itemsInSection: [Int: Int] = [:]

    override var preferredStatusBarStyle: UIStatusBarStyle {
        return .default
    }
}

extension StoryboardViewController: UICollectionViewDataSource {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 20
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        if let numberOfItems = itemsInSection[section] {
            return numberOfItems
        }
        let numberOfItems = Int.random(in: 1...6)
        itemsInSection[section] = numberOfItems
        return numberOfItems
    }

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(
            withReuseIdentifier: CustomCollectionViewCell.reuseIdentifier,
            for: indexPath) as! CustomCollectionViewCell
        cell.text = "\(indexPath.section):\(indexPath.row)"
        return cell
    }

    func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        let view = collectionView.dequeueReusableSupplementaryView(
            ofKind: kind,
            withReuseIdentifier: CustomHeaderView.reuseIdentifier,
            for: indexPath) as! CustomHeaderView
        view.section = indexPath.section
        view.text = "section: \(indexPath.section)"
        view.delegate = self
        return view
    }
}

extension StoryboardViewController: UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let interitemSpacing = self.collectionView.minimumInteritemSpacing * CGFloat(itemsInRow - 1)
        let totalSpacing = collectionView.bounds.width - self.collectionView.sectionInset.left - self.collectionView.sectionInset.right - interitemSpacing
        let width = totalSpacing / CGFloat(itemsInRow)
        return CGSize(width: width, height: width)
    }

    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
        return CGSize(width: UIScreen.main.bounds.size.width, height: 60)
    }
}

extension StoryboardViewController: CustomHeaderViewDelegate {
    func selectSection(section: Int) {
        self.collectionView.toggle(to: section, animated: true)
    }
}


================================================
FILE: Example/Source/Supporting Files/Info.plist
================================================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>$(DEVELOPMENT_LANGUAGE)</string>
	<key>CFBundleDisplayName</key>
	<string>CampcotCollectionView</string>
	<key>CFBundleExecutable</key>
	<string>$(EXECUTABLE_NAME)</string>
	<key>CFBundleIdentifier</key>
	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>$(PRODUCT_NAME)</string>
	<key>CFBundlePackageType</key>
	<string>APPL</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0</string>
	<key>CFBundleVersion</key>
	<string>1</string>
	<key>LSRequiresIPhoneOS</key>
	<true/>
	<key>UILaunchStoryboardName</key>
	<string>Launch Screen</string>
	<key>UIMainStoryboardFile</key>
	<string>Main</string>
	<key>UIRequiredDeviceCapabilities</key>
	<array>
		<string>armv7</string>
	</array>
	<key>UIStatusBarStyle</key>
	<string>UIStatusBarStyleDefault</string>
	<key>UISupportedInterfaceOrientations</key>
	<array>
		<string>UIInterfaceOrientationPortrait</string>
		<string>UIInterfaceOrientationLandscapeLeft</string>
		<string>UIInterfaceOrientationLandscapeRight</string>
	</array>
	<key>UISupportedInterfaceOrientations~ipad</key>
	<array>
		<string>UIInterfaceOrientationPortrait</string>
		<string>UIInterfaceOrientationPortraitUpsideDown</string>
		<string>UIInterfaceOrientationLandscapeLeft</string>
		<string>UIInterfaceOrientationLandscapeRight</string>
	</array>
</dict>
</plist>


================================================
FILE: Example/Source/ViewController.swift
================================================
//
//  ViewController.swift
//  Example
//
//  Created by Panda Systems on 12/19/17.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

import UIKit
import CampcotCollectionView

class ViewController: UIViewController {
    let collectionView = CampcotCollectionView()
    
    let interitemSpacing: CGFloat = 10
    let lineSpacing: CGFloat = 10
    let sectionInsets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
    
    let backgroundColor = UIColor(red: 189 / 255, green: 195 / 255, blue: 199 / 255, alpha: 1)

    let itemsInRow = 2
    var itemsInSection: [Int: Int] = [:]

    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = backgroundColor
        self.collectionView.backgroundColor = backgroundColor
        self.collectionView.clipsToBounds = true
        self.collectionView.sectionInset = sectionInsets
        self.collectionView.minimumSectionSpacing = 1
        self.collectionView.minimumInteritemSpacing = interitemSpacing
        self.collectionView.minimumLineSpacing = lineSpacing
        self.collectionView.sectionHeadersPinToVisibleBounds = true
        self.collectionView.register(
            CustomCollectionViewCell.self,
            forCellWithReuseIdentifier: CustomCollectionViewCell.reuseIdentifier
        )
        self.collectionView.register(
            CustomHeaderView.self,
            forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader,
            withReuseIdentifier: CustomHeaderView.reuseIdentifier
        )
        self.collectionView.delegate = self
        self.collectionView.dataSource = self
        self.collectionView.translatesAutoresizingMaskIntoConstraints = false
        self.view.addSubview(self.collectionView)
        self.activateCollectionViewConstraints(view: self.collectionView, anchorView: self.view)
    }
    
    override var preferredStatusBarStyle: UIStatusBarStyle {
        return .default
    }
    
    private func activateCollectionViewConstraints(view: UIView, anchorView: UIView) {
        NSLayoutConstraint.activate([
            view.leadingAnchor.constraint(equalTo: anchorView.leadingAnchor),
            view.trailingAnchor.constraint(equalTo: anchorView.trailingAnchor),
            view.topAnchor.constraint(equalTo: self.topLayoutGuide.bottomAnchor),
            view.bottomAnchor.constraint(equalTo: self.bottomLayoutGuide.topAnchor)
            ])
    }
}

extension ViewController: UICollectionViewDataSource {
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 20
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        if let numberOfItems = itemsInSection[section] {
            return numberOfItems
        }
        let numberOfItems = Int.random(in: 1...6)
        itemsInSection[section] = numberOfItems
        return numberOfItems
    }
    
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(
            withReuseIdentifier: CustomCollectionViewCell.reuseIdentifier,
            for: indexPath) as! CustomCollectionViewCell
        cell.text = "\(indexPath.section):\(indexPath.row)"
        return cell
    }
    
    func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        let view = collectionView.dequeueReusableSupplementaryView(
            ofKind: kind,
            withReuseIdentifier: CustomHeaderView.reuseIdentifier,
            for: indexPath) as! CustomHeaderView
        view.section = indexPath.section
        view.text = "section: \(indexPath.section)"
        view.delegate = self
        return view
    }
}

extension ViewController: UICollectionViewDelegateFlowLayout {
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
        let width = (collectionView.bounds.width - sectionInsets.left - sectionInsets.right - interitemSpacing * CGFloat(itemsInRow - 1)) / CGFloat(itemsInRow)
        return CGSize(width: width, height: width)
    }
    
    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
        return CGSize(width: UIScreen.main.bounds.size.width, height: 60)
    }
}

extension ViewController: CustomHeaderViewDelegate {
    func selectSection(section: Int) {
        self.collectionView.toggle(to: section, animated: true)
    }
}


================================================
FILE: LICENSE
================================================
Copyright (c) 2018 Touchlane LLC tech@touchlane.com

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
================================================
![LOGO](https://github.com/touchlane/CampcotCollectionView/blob/master/Assets/logo.svg)

![Language](https://img.shields.io/badge/swift-5.0-orange.svg)
[![Build Status](https://travis-ci.org/touchlane/CampcotCollectionView.svg?branch=master)](https://travis-ci.org/touchlane/CampcotCollectionView)
[![codecov](https://codecov.io/gh/touchlane/CampcotCollectionView/branch/master/graph/badge.svg)](https://codecov.io/gh/touchlane/CampcotCollectionView)
[![Version](https://img.shields.io/cocoapods/v/CampcotCollectionView.svg?style=flat)](http://cocoapods.org/pods/CampcotCollectionView)
[![License](https://img.shields.io/cocoapods/l/CampcotCollectionView.svg?style=flat)](http://cocoapods.org/pods/CampcotCollectionView)
[![Platform](https://img.shields.io/cocoapods/p/CampcotCollectionView.svg?style=flat)](http://cocoapods.org/pods/CampcotCollectionView)

This library provides a custom `UICollectionView` that allows to expand and collapse sections. Provides a simple API to manage collection view appearance.

![CampcotCollectionView](Example/Assets/campcot.gif)

# Requirements

* iOS 9.0+
* Xcode 10.2+
* Swift 5.0+

# Installation

## CocoaPods

[CocoaPods](https://cocoapods.org) is a dependency manager for Cocoa projects. You can install it with the following command:

```$ gem install cocoapods```

To integrate CampcotCollectionView into your Xcode project using CocoaPods, specify it in your ```Podfile```:

```ruby
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '9.0'
use_frameworks!

target '<Your Target Name>' do
    pod 'CampcotCollectionView'
end
```

Then, run the following command:

```$ pod install```

# Usage

### Manual Setup

```swift
import CampcotCollectionView
```

1. Create CollectionView
```swift
let campcotCollectionView = CampcotCollectionView()
```
2. Add `campcotCollectionView` to view hierarchy.
3. Call `toggle` method on `campcotCollectionView`.
```swift
public func toggle(to section: Int,
                   offsetCorrection: CGFloat = default,
                   animated: Bool,
                   completion: ((Bool) -> Void)? = default)
```
### Storyboard Setup

1. Add UICollectionView to your Storyboard.
2. In `Identity Inspector` set the `Class` property to `CampcotCollectionView`.
3. Open `Attributes Inspector` and set the `Layout` property to `Custom`. Set `Class` property to either `ExpandedLayout` or `CollapsedLayout`.
4. Create outlet for your collectionView.
5. Set datasource and delegate for collectionView.
5. Set the settings for collectionView in  `Attributes Inspector` or manualy.

# Documentation

### CampcotCollectionView

A Boolean value that determines whether the sections are expanded.
```swift
public var isExpanded: Bool { get }
```

Expands all the sections. Pins a section at index `section` to the top of view bounds.
`offsetCorrection` - the offset for pinned section from the top. Default value of `offsetCorrection` is `0`.
`animated` - if `true` expands sections with animation.
`completion` - callback for animation.
```swift
public func expand(from section: Int,
                   offsetCorrection: CGFloat = default,
                   animated: Bool,
                   completion: ((Bool) -> Void)? = default)
```

Collapses all the sections. Pins a section at index `section` to the top of view bounds.
`offsetCorrection` - the offset for pinned section from the top. Default value of `offsetCorrection` is `0`.
`animated` - if `true` collapses sections with animation.
`completion` - callback for animation.
```swift
public func collapse(to section: Int,
                     offsetCorrection: CGFloat = default,
                     animated: Bool,
                     completion: ((Bool) -> Void)? = default)
```

Toggles current state from collapsed to expaned and vise versa. Pins a section at index `section` to the top of view bounds.
`offsetCorrection` - the offset for pinned section from the top. Default value of `offsetCorrection` is `0`.
`animated` - if `true` toggles sections with animation.
`completion` - callback for animation.
```swift
public func toggle(to section: Int,
                   offsetCorrection: CGFloat = default,
                   animated: Bool,
                   completion: ((Bool) -> Void)? = default)
```
___


================================================
FILE: Source/CampcotCollectionView.swift
================================================
//
//  CampcotCollectionView.swift
//  CampcotCollectionView
//
//  Created by Vadim Morozov on 1/29/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

public class CampcotCollectionView: UICollectionView {
    private var expandedLayout: ExpandedLayout!
    private var collapsedLayout: CollapsedLayout!

    /// A Boolean value that determines whether the sections are expanded.
    public var isExpanded: Bool {
        return self.collectionViewLayout === self.expandedLayout
    }
    
    /// Space between section headers in collapsed state.
    @IBInspectable
    public var minimumSectionSpacing: CGFloat = 0 {
        didSet {
            self.expandedLayout.minimumSectionSpacing = minimumSectionSpacing
            self.collapsedLayout.minimumSectionSpacing = minimumSectionSpacing
        }
    }
    
    /// Layout minimum interitem spaceign.
    @IBInspectable
    public var minimumInteritemSpacing: CGFloat = 0 {
        didSet {
            self.expandedLayout.minimumInteritemSpacing = minimumInteritemSpacing
            self.collapsedLayout.minimumInteritemSpacing = minimumInteritemSpacing
        }
    }
    
    /// Layout minimum line spacing.
    @IBInspectable
    public var minimumLineSpacing: CGFloat = 0 {
        didSet {
            self.expandedLayout.minimumLineSpacing = minimumLineSpacing
            self.collapsedLayout.minimumLineSpacing = minimumLineSpacing
        }
    }
    
    /// Layout section inset.
    public var sectionInset = UIEdgeInsets.zero {
        didSet {
            self.expandedLayout.sectionInset = sectionInset
            self.collapsedLayout.sectionInset = sectionInset
        }
    }

    @IBInspectable
    private var topInset: CGFloat = 0 {
        didSet {
            sectionInset.top = topInset
        }
    }

    @IBInspectable
    private var bottomInset: CGFloat = 0 {
        didSet {
            sectionInset.bottom = bottomInset
        }
    }

    @IBInspectable
    private var leftInset: CGFloat = 0 {
        didSet {
            sectionInset.left = leftInset
        }
    }

    @IBInspectable
    private var rightInset: CGFloat = 0 {
        didSet {
            sectionInset.right = rightInset
        }
    }

    /// Layout section headers pin to visible bounds.
    @IBInspectable
    public var sectionHeadersPinToVisibleBounds: Bool = false {
        didSet {
            self.expandedLayout.sectionHeadersPinToVisibleBounds = sectionHeadersPinToVisibleBounds
            self.collapsedLayout.sectionHeadersPinToVisibleBounds = sectionHeadersPinToVisibleBounds
        }
    }

    /// Content size calculation rules.
    public var contentSizeAdjustmentBehavior: ContentSizeAdjustmentBehavior = .normal {
        didSet {
            self.expandedLayout.contentSizeAdjustmentBehavior = contentSizeAdjustmentBehavior
            self.collapsedLayout.contentSizeAdjustmentBehavior = contentSizeAdjustmentBehavior
        }
    }
    
    public init(isExpanded: Bool = true) {
        expandedLayout = ExpandedLayout()
        collapsedLayout = CollapsedLayout()
        super.init(frame: .zero, collectionViewLayout: isExpanded ? self.expandedLayout : self.collapsedLayout)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        if let expandedLayout = self.collectionViewLayout as? ExpandedLayout {
            /// When collectionViewLayout is expanded
            self.expandedLayout = expandedLayout
            self.collapsedLayout = CollapsedLayout()
        } else if let collapsedLayout = self.collectionViewLayout as? CollapsedLayout {
            /// When collectionViewLayout is collapsed
            self.expandedLayout = ExpandedLayout()
            self.collapsedLayout = collapsedLayout
        } else {
            /// By default, if collectionViewLayout was not set neither expanded nor collapsed
            self.expandedLayout = ExpandedLayout()
            self.collapsedLayout = CollapsedLayout()

            self.collectionViewLayout = self.expandedLayout /// Default layout
        }
    }
    
    /// Expand all sections and pin section from params to top.
    public func expand(from section: Int,
                       offsetCorrection: CGFloat = 0,
                       animated: Bool,
                       completion: ((Bool) -> Void)? = nil) {
        guard !self.isExpanded else {
            return
        }
        self.expandedLayout.targetSection = section
        self.expandedLayout.offsetCorrection = offsetCorrection
        self.collapsedLayout.targetSection = section
        self.collapsedLayout.offsetCorrection = offsetCorrection
        self.setCollectionViewLayout(self.expandedLayout, animated: animated, completion: { completed in
            DispatchQueue.main.async(execute: {
                completion?(completed)
            })
        })
    }
    
    /// Collapse all sections and pin section from params to top.
    public func collapse(to section: Int,
                         offsetCorrection: CGFloat = 0,
                         animated: Bool,
                         completion: ((Bool) -> Void)? = nil) {
        guard self.isExpanded else {
            return
        }
        self.expandedLayout.targetSection = section
        self.expandedLayout.offsetCorrection = offsetCorrection
        self.collapsedLayout.targetSection = section
        self.collapsedLayout.offsetCorrection = offsetCorrection
        self.setCollectionViewLayout(self.collapsedLayout, animated: animated, completion: { completed in
            DispatchQueue.main.async(execute: {
                completion?(completed)
            })
        })
    }
    
    /// Change sections mode to opposite.
    public func toggle(to section: Int,
                       offsetCorrection: CGFloat = 0,
                       animated: Bool,
                       completion: ((Bool) -> Void)? = nil) {
        if self.isExpanded {
            self.collapse(to: section,
                          offsetCorrection: offsetCorrection,
                          animated: animated,
                          completion: completion)
        }
        else {
            self.expand(from: section,
                        offsetCorrection: offsetCorrection,
                        animated: animated,
                        completion: completion)
        }
    }
}


================================================
FILE: Source/CollapsedLayout.swift
================================================
//
//  CollapsedLayout.swift
//  CampcotCollectionView
//
//  Created by Vadim Morozov on 1/29/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

public class CollapsedLayout: UICollectionViewFlowLayout {
    var targetSection: Int = 0
    var offsetCorrection: CGFloat = 0
    var minimumSectionSpacing: CGFloat = 0 {
        didSet {
            self.invalidateLayout()
        }
    }
    
    private var contentHeight: CGFloat = 0
    private var contentWidth: CGFloat {
        guard let collectionView = self.collectionView else {
            return 0
        }
        let insets = collectionView.contentInset
        return collectionView.bounds.width - (insets.left + insets.right)
    }

    public var contentSizeAdjustmentBehavior: ContentSizeAdjustmentBehavior = .normal {
        didSet {
            self.invalidateLayout()
        }
    }
    
    override public var collectionViewContentSize: CGSize {
        switch self.contentSizeAdjustmentBehavior {
        case .normal:
            return CGSize(width: self.contentWidth, height: self.contentHeight)
        case .fitHeight(let adjustInsets):
            guard let collectionView = self.collectionView else {
                return CGSize(width: self.contentWidth, height: self.contentHeight)
            }
            var adjustedContentHeight = collectionView.bounds.height
            if adjustInsets.contains(.top) {
                adjustedContentHeight -= collectionView.contentInset.top
            }
            if adjustInsets.contains(.bottom) {
                adjustedContentHeight -= collectionView.contentInset.bottom
            }
            let contentHeight = max(self.contentHeight, adjustedContentHeight)
            return CGSize(width: self.contentWidth, height: contentHeight)
        }
    }
    
    override public var sectionInset: UIEdgeInsets {
        get {
            return super.sectionInset
        }
        set {
            super.sectionInset = UIEdgeInsets(top: 0, left: newValue.left, bottom: 0, right: newValue.right)
        }
    }
    
    private var headersAttributes: [UICollectionViewLayoutAttributes] = []
    private var itemsAttributes: [[UICollectionViewLayoutAttributes]] = []
    
    override public func prepare() {
        super.prepare()
        
        guard let collectionView = self.collectionView else {
            return
        }
        
        guard let delegate = collectionView.delegate as? UICollectionViewDelegateFlowLayout else {
            return
        }
        
        guard let dataSource = collectionView.dataSource else {
            return
        }
        self.headersAttributes = []
        self.itemsAttributes = []
        self.contentHeight = 0
        
        let numberOfSections = dataSource.numberOfSections!(in: collectionView)
        for section in 0..<numberOfSections {
            let headerSize = delegate.collectionView!(collectionView, layout: self, referenceSizeForHeaderInSection: section)
            let height = headerSize.height
            let width = headerSize.width
            let indexPath = IndexPath(row: 0, section: section)
            let attributes = UICollectionViewLayoutAttributes(
                forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader,
                with: indexPath
            )
            attributes.frame = CGRect(x: 0, y: self.contentHeight, width: width, height: height)
            self.headersAttributes.append(attributes)
            self.contentHeight += height
            self.contentHeight += self.minimumSectionSpacing / 2
            
            self.itemsAttributes.append([])
            let numberOfItems = dataSource.collectionView(collectionView, numberOfItemsInSection: section)
            for row in 0..<numberOfItems {
                let indexPath = IndexPath(row: row, section: section)
                let itemSize = delegate.collectionView!(collectionView, layout: self, sizeForItemAt: indexPath)
                let attributes = UICollectionViewLayoutAttributes(forCellWith: indexPath)

                let columnsCount = Int(contentWidth / itemSize.width)
                let column = row % columnsCount

                attributes.frame = CGRect(
                    x: sectionInset.left + CGFloat(column) * (itemSize.width + minimumInteritemSpacing),
                    y: contentHeight,
                    width: itemSize.width,
                    height: 0
                )
                attributes.isHidden = true
                self.itemsAttributes[section].append(attributes)
            }
            self.contentHeight += self.minimumSectionSpacing / 2
        }
    }
    
    override public func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
        guard self.collectionView?.dataSource != nil else {
            return nil
        }
        
        var visibleLayoutAttributes: [UICollectionViewLayoutAttributes] = []
        
        for attributes in headersAttributes {
            if attributes.frame.intersects(rect) {
                visibleLayoutAttributes.append(attributes)
            }
        }
        return visibleLayoutAttributes
    }
    
    override public func layoutAttributesForSupplementaryView(ofKind elementKind: String, at indexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
        guard self.headersAttributes.indices.contains(indexPath.section) else {
            return super.layoutAttributesForSupplementaryView(ofKind: elementKind, at: indexPath)
        }
        return self.headersAttributes[indexPath.section]
    }
    
    
    override public func layoutAttributesForItem(at indexPath: IndexPath) ->  UICollectionViewLayoutAttributes? {
        guard self.itemsAttributes.indices.contains(indexPath.section) else {
            return super.layoutAttributesForItem(at: indexPath)
        }
        guard self.itemsAttributes[indexPath.section].indices.contains(indexPath.row) else {
            return super.layoutAttributesForItem(at: indexPath)
        }
        return self.itemsAttributes[indexPath.section][indexPath.row]
    }
    
    override public func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint) -> CGPoint {
        guard let collectionView = self.collectionView else {
            return proposedContentOffset
        }
        var targetOffset = proposedContentOffset
        targetOffset.y = offsetCorrection
        for section in 0..<self.targetSection {
            let height = self.headersAttributes[section].frame.size.height
            targetOffset.y += height
            targetOffset.y += minimumSectionSpacing
        }
        let emptySpace = collectionView.bounds.size.height - (self.collectionViewContentSize.height - targetOffset.y)
        if emptySpace > 0 {
            targetOffset.y = targetOffset.y - emptySpace
        }
        if self.contentHeight < self.collectionViewContentSize.height {
            let freeSpace = self.collectionViewContentSize.height - (targetOffset.y - self.offsetCorrection)
            if freeSpace > 0 {
                targetOffset.y = self.offsetCorrection
            }
        }
        return targetOffset
    }
}


================================================
FILE: Source/ContentSizeAdjustmentBehavior.swift
================================================
//
//  ContentSizeAdjustmentBehavior.swift
//  CampcotCollectionView
//
//  Created by Vadim Morozov on 10/30/19.
//  Copyright © 2019 Touchlane LLC. All rights reserved.
//

public enum ContentSizeAdjustmentBehavior {
    public struct Inset: OptionSet {
        public let rawValue: Int

        public init(rawValue: Int) {
            self.rawValue = rawValue
        }

        public static let top = Inset(rawValue: 1 << 0)
        public static let bottom = Inset(rawValue: 1 << 1)

        public static let none: Inset = []
        public static let all: Inset = [.top, .bottom]
    }

    /// Content size depends only on content.
    case normal

    /// Content size can't be less than collection view frame without adjust insets.
    case fitHeight(adjustInsets: Inset)
}


================================================
FILE: Source/ExpandedLayout.swift
================================================
//
//  ExpandedLayout.swift
//  CampcotCollectionView
//
//  Created by Vadim Morozov on 1/26/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

public class ExpandedLayout: UICollectionViewFlowLayout  {
    var targetSection: Int = 0
    var offsetCorrection: CGFloat = 0
    var minimumSectionSpacing: CGFloat = 0
    
    private var isTransitingToCollapsed = false {
        didSet {
            guard oldValue != isTransitingToCollapsed else {
                return
            }
            self.invalidateLayout()
        }
    }
    private var isTransitingToExpanded = false {
        didSet {
            guard oldValue != isTransitingToExpanded else {
                return
            }
            self.didFinishExpandTransition = !isTransitingToExpanded
            self.invalidateLayout()
        }
    }
    private var didFinishExpandTransition = false
    private var contentHeight: CGFloat = 0
    private var contentWidth: CGFloat {
        guard let collectionView = collectionView else {
            return 0
        }
        let insets = collectionView.contentInset
        return collectionView.bounds.width - (insets.left + insets.right)
    }

    public var contentSizeAdjustmentBehavior: ContentSizeAdjustmentBehavior = .normal {
        didSet {
            self.invalidateLayout()
        }
    }
    
    override public var collectionViewContentSize: CGSize {
        switch self.contentSizeAdjustmentBehavior {
        case .normal:
            return CGSize(width: self.contentWidth, height: self.contentHeight)
        case .fitHeight(let adjustInsets):
            guard let collectionView = self.collectionView else {
                return CGSize(width: self.contentWidth, height: self.contentHeight)
            }
            var adjustedContentHeight = collectionView.bounds.height
            if adjustInsets.contains(.top) {
                adjustedContentHeight -= collectionView.contentInset.top
            }
            if adjustInsets.contains(.bottom) {
                adjustedContentHeight -= collectionView.contentInset.bottom
            }
            let contentHeight = max(self.contentHeight, adjustedContentHeight)
            return CGSize(width: self.contentWidth, height: contentHeight)
        }
    }
    
    private var headersAttributes: [UICollectionViewLayoutAttributes] = []
    private var itemsAttributes: [[UICollectionViewLayoutAttributes]] = []
    
    override public func prepare() {
        super.prepare()
        
        guard !self.isTransitingToCollapsed else {
            self.collapseInvisibleSections()
            return
        }
        
        guard !self.isTransitingToExpanded else {
            self.expandVisibleSections()
            return
        }
        
        guard let collectionView = self.collectionView else {
            return
        }
        
        guard let delegate = collectionView.delegate as? UICollectionViewDelegateFlowLayout else {
            return
        }
        
        guard let dataSource = collectionView.dataSource else {
            return
        }
        
        self.headersAttributes = []
        self.itemsAttributes = []
        self.contentHeight = 0
        
        let numberOfSections = dataSource.numberOfSections!(in: collectionView)
        for section in 0..<numberOfSections {
            let headerSize = delegate.collectionView!(collectionView, layout: self, referenceSizeForHeaderInSection: section)
            let height = headerSize.height
            let width = headerSize.width
            
            let indexPath = IndexPath(row: 0, section: section)
            let attributes = UICollectionViewLayoutAttributes(forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader, with: indexPath)
            attributes.frame = CGRect(x: 0, y: contentHeight, width: width, height: height)
            self.headersAttributes.append(attributes)
            self.contentHeight += height
            self.contentHeight += self.sectionInset.top
            
            self.itemsAttributes.append([])
            let numberOfItems = dataSource.collectionView(collectionView, numberOfItemsInSection: section)
            for row in 0..<numberOfItems {
                let indexPath = IndexPath(row: row, section: section)
                let itemSize = delegate.collectionView!(collectionView, layout: self, sizeForItemAt: indexPath)
                let attributes = UICollectionViewLayoutAttributes(forCellWith: indexPath)

                let columnsCount = Int(contentWidth / itemSize.width)
                let column = row % columnsCount
                attributes.frame = CGRect(
                    x: sectionInset.left + CGFloat(column) * (itemSize.width + minimumInteritemSpacing),
                    y: contentHeight,
                    width: itemSize.width,
                    height: itemSize.height
                )

                attributes.isHidden = false
                self.itemsAttributes[section].append(attributes)

                if column == columnsCount - 1 || row == numberOfItems - 1 {
                    self.contentHeight += itemSize.height
                    if row < numberOfItems - 1 {
                        contentHeight += minimumLineSpacing
                    }
                }
            }
            self.contentHeight += self.sectionInset.bottom
        }
        if self.didFinishExpandTransition {
            self.setRealOffset()
            self.didFinishExpandTransition = false
        }
    }
    
    override public func prepareForTransition(to newLayout: UICollectionViewLayout) {
        super.prepareForTransition(to: newLayout)
        if newLayout is CollapsedLayout {
            self.isTransitingToCollapsed = true
        }
    }
    
    override public func prepareForTransition(from oldLayout: UICollectionViewLayout) {
        super.prepareForTransition(from: oldLayout)
        if oldLayout is CollapsedLayout {
            self.isTransitingToExpanded = true
        }
    }
    
    override public func finalizeLayoutTransition() {
        super.finalizeLayoutTransition()
        self.isTransitingToCollapsed = false
        self.isTransitingToExpanded = false
    }
    
    override public func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
        guard self.collectionView?.dataSource != nil else {
            return nil
        }
        
        guard isTransitingToCollapsed || isTransitingToExpanded else {
            let superAttributes = super.layoutAttributesForElements(in: rect)
            guard let attributes = superAttributes else {
                return superAttributes
            }
            for elementAttributes in attributes {
                guard elementAttributes.representedElementCategory == .supplementaryView else {
                    continue
                }
                guard self.headersAttributes.indices.contains(elementAttributes.indexPath.section) else {
                    continue
                }
                elementAttributes.frame.origin.y -= self.sectionHeadersPinToBoundsCorrection(
                    proposedTopOffset: elementAttributes.frame.origin.y,
                    estimatedTopOffset: self.headersAttributes[elementAttributes.indexPath.section].frame.origin.y)
            }
            return attributes
        }
        var visibleLayoutAttributes: [UICollectionViewLayoutAttributes] = []
        for attributes in headersAttributes {
            if attributes.frame.intersects(rect) {
                visibleLayoutAttributes.append(attributes)
            }
        }
        for sectionAttributes in itemsAttributes {
            for attributes in sectionAttributes {
                if attributes.frame.intersects(rect) {
                    visibleLayoutAttributes.append(attributes)
                }
            }
        }
        return visibleLayoutAttributes
    }
   
    override public func layoutAttributesForSupplementaryView(ofKind elementKind: String, at indexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
        guard self.headersAttributes.indices.contains(indexPath.section) else {
            return super.layoutAttributesForSupplementaryView(ofKind: elementKind, at: indexPath)
        }
        guard isTransitingToCollapsed || isTransitingToExpanded else {
            let attributes = super.layoutAttributesForSupplementaryView(ofKind: elementKind, at: indexPath)
            
            guard let proposedTopOffset = attributes?.frame.origin.y else {
                return attributes
            }
            let estimatedTopOffset = self.headersAttributes[indexPath.section].frame.origin.y
            attributes?.frame.origin.y -= self.sectionHeadersPinToBoundsCorrection(
                proposedTopOffset: proposedTopOffset,
                estimatedTopOffset: estimatedTopOffset)
            return attributes
        }
        return self.headersAttributes[indexPath.section]
    }

    override public func layoutAttributesForItem(at indexPath: IndexPath) ->  UICollectionViewLayoutAttributes? {
        guard self.itemsAttributes.indices.contains(indexPath.section) else {
            return super.layoutAttributesForItem(at: indexPath)
        }
        guard self.itemsAttributes[indexPath.section].indices.contains(indexPath.row) else {
            return super.layoutAttributesForItem(at: indexPath)
        }
        return self.itemsAttributes[indexPath.section][indexPath.row]
    }
    
    override public func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint) -> CGPoint {
        guard let collectionView = self.collectionView else {
            return proposedContentOffset
        }
        var targetOffset = proposedContentOffset
        targetOffset.y = offsetCorrection
        for section in 0..<self.targetSection {
            let height = self.headersAttributes[section].frame.size.height
            targetOffset.y += height
            targetOffset.y += self.sectionInset.top
            var sectionContentHeight: CGFloat = 0
            let numberOfItems = self.itemsAttributes[section].count
            for row in 0..<numberOfItems {
                let itemSize = self.itemsAttributes[section][row].frame.size

                let columnsCount = Int(self.contentWidth / itemSize.width)
                let column = row % columnsCount

                if column == columnsCount - 1 || row == numberOfItems - 1 {
                    sectionContentHeight += itemSize.height
                    targetOffset.y += itemSize.height
                    if row < numberOfItems - 1 && itemSize.height > 0 {
                        targetOffset.y += self.minimumLineSpacing
                    }
                }
            }
            targetOffset.y += self.sectionInset.bottom
            if sectionContentHeight == 0 {
                targetOffset.y -= self.sectionInset.top
                targetOffset.y -= self.sectionInset.bottom
                targetOffset.y += self.minimumSectionSpacing
            }
        }
        let emptySpace = collectionView.bounds.size.height - (max(self.contentHeight, collectionView.bounds.size.height) - targetOffset.y)
        if emptySpace > 0 {
            targetOffset.y = targetOffset.y - emptySpace
        }
        return targetOffset
    }
    
    public func collapseInvisibleSections() {
        guard let collectionView = self.collectionView else {
            return
        }
        
        guard let delegate = collectionView.delegate as? UICollectionViewDelegateFlowLayout else {
            return
        }
        
        guard let dataSource = collectionView.dataSource else {
            return
        }
        
        var contentOffset = collectionView.contentOffset
        let previousItemsAttributes = self.itemsAttributes
        let visibleItemIndexPaths = collectionView.indexPathsForVisibleItems
        let visibleSections = Set<Int>(visibleItemIndexPaths.map({ $0.section }))
        
        self.headersAttributes = []
        self.itemsAttributes = []
        self.contentHeight = 0
        
        let numberOfSections = dataSource.numberOfSections!(in: collectionView)
        for section in 0..<numberOfSections {
            let headerSize = delegate.collectionView!(collectionView, layout: self, referenceSizeForHeaderInSection: section)
            let height = headerSize.height
            let width = headerSize.width
            
            let indexPath = IndexPath(row: 0, section: section)
            let attributes = UICollectionViewLayoutAttributes(
                forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader,
                with: indexPath
            )
            attributes.frame = CGRect(x: 0, y: contentHeight, width: width, height: height)
            self.headersAttributes.append(attributes)
            self.contentHeight += height
            
            if visibleSections.contains(section) {
                self.contentHeight += self.sectionInset.top
            }
            else {
                self.contentHeight += self.minimumSectionSpacing / 2
                if section < targetSection {
                    contentOffset.y -= self.sectionInset.top
                    contentOffset.y += self.minimumSectionSpacing
                }
            }
            
            self.itemsAttributes.append([])
            let numberOfItems = dataSource.collectionView(collectionView, numberOfItemsInSection: section)
            for row in 0..<numberOfItems {
                let indexPath = IndexPath(row: row, section: section)
                var itemSize = delegate.collectionView!(collectionView, layout: self, sizeForItemAt: indexPath)
                itemSize.height = visibleItemIndexPaths.contains(indexPath) ? itemSize.height : 0
                let attributes = UICollectionViewLayoutAttributes(forCellWith: indexPath)

                let columnsCount = Int(self.contentWidth / itemSize.width)
                let column = row % columnsCount
                attributes.frame = CGRect(
                    x: self.sectionInset.left + CGFloat(column) * (itemSize.width + self.minimumInteritemSpacing),
                    y: contentHeight,
                    width: itemSize.width,
                    height: itemSize.height
                )

                attributes.isHidden = false
                self.itemsAttributes[section].append(attributes)

                if column == columnsCount - 1 || row == numberOfItems - 1 {
                    self.contentHeight += itemSize.height
                    if !visibleItemIndexPaths.contains(indexPath) && section < targetSection {
                        contentOffset.y -= previousItemsAttributes[section][row].frame.size.height
                    }
                    let hasVisibleItemsAfterCurrent = visibleItemIndexPaths.filter({ $0.section == section && $0.row > row }).count > 0
                    if !visibleItemIndexPaths.contains(indexPath) && section == targetSection && hasVisibleItemsAfterCurrent {
                        contentOffset.y -= previousItemsAttributes[section][row].frame.size.height
                    }
                    if row < numberOfItems - 1 && visibleItemIndexPaths.contains(indexPath) {
                        let nextIndexPath = IndexPath(row: indexPath.row + 1, section: indexPath.section)
                        if visibleItemIndexPaths.contains(nextIndexPath) {
                            contentHeight += self.minimumLineSpacing
                        }
                    }
                    if row < numberOfItems - 1 && !visibleItemIndexPaths.contains(indexPath) && section < targetSection {
                        contentOffset.y -= self.minimumLineSpacing
                    }
                    if !visibleItemIndexPaths.contains(indexPath) && section == targetSection && hasVisibleItemsAfterCurrent {
                        contentOffset.y -= self.minimumLineSpacing
                    }
                }
            }
            
            if visibleSections.contains(section) {
                self.contentHeight += self.sectionInset.bottom
            }
            else {
                self.contentHeight += self.minimumSectionSpacing / 2
                if section < targetSection {
                    contentOffset.y -= self.sectionInset.bottom
                }
            }
            
            if sectionHeadersPinToVisibleBounds {
                let headerAttributes = self.headersAttributes[section]
                if section == self.targetSection &&
                    self.contentHeight - contentOffset.y < collectionView.contentInset.top {

                    headerAttributes.frame.origin.y = min(self.contentHeight - headerAttributes.frame.size.height, contentOffset.y)
                    let originY = headerAttributes.frame.origin.y
                    for i in (0..<section).reversed() {
                        self.headersAttributes[i].frame.origin.y = originY - self.headersAttributes[i].frame.size.height * CGFloat(section - i)
                    }
                    headerAttributes.frame.origin.y = originY
                }
                else if visibleSections.contains(section) && contentOffset.y > headerAttributes.frame.origin.y {

                    let originY = min(self.contentHeight - headerAttributes.frame.size.height, contentOffset.y)
                    for i in (0..<section).reversed() {
                        self.headersAttributes[i].frame.origin.y = originY - self.headersAttributes[i].frame.size.height * CGFloat(section - i)
                    }
                    headerAttributes.frame.origin.y = originY
                }
            }
        }
        collectionView.setContentOffset(contentOffset, animated: false)
    }

    public func expandVisibleSections() {
        guard let collectionView = self.collectionView else {
            return
        }
        
        guard let delegate = collectionView.delegate as? UICollectionViewDelegateFlowLayout else {
            return
        }
        
        guard let dataSource = collectionView.dataSource else {
            return
        }
        
        let visibleItemIndexPaths = self.determineVisibleIndexPaths()
        let visibleSections = Set<Int>(visibleItemIndexPaths.map({ $0.section }))
        
        self.headersAttributes = []
        self.itemsAttributes = []
        self.contentHeight = 0
        
        let numberOfSections = dataSource.numberOfSections!(in: collectionView)
        for section in 0..<numberOfSections {
            let headerSize = delegate.collectionView!(collectionView, layout: self, referenceSizeForHeaderInSection: section)
            let height = headerSize.height
            let width = headerSize.width
            
            let indexPath = IndexPath(row: 0, section: section)
            let attributes = UICollectionViewLayoutAttributes(
                forSupplementaryViewOfKind: UICollectionView.elementKindSectionHeader,
                with: indexPath
            )
            attributes.frame = CGRect(x: 0, y: contentHeight, width: width, height: height)
            self.headersAttributes.append(attributes)
            self.contentHeight += height
            
            if visibleSections.contains(section) {
                self.contentHeight += self.sectionInset.top
            }
            else {
                self.contentHeight += self.minimumSectionSpacing / 2
            }
            
            self.itemsAttributes.append([])
            let numberOfItems = dataSource.collectionView(collectionView, numberOfItemsInSection: section)
            for row in 0..<numberOfItems {
                let indexPath = IndexPath(row: row, section: section)
                var itemSize = delegate.collectionView!(collectionView, layout: self, sizeForItemAt: indexPath)
                itemSize.height = visibleItemIndexPaths.contains(indexPath) ? itemSize.height : 0
                let attributes = UICollectionViewLayoutAttributes(forCellWith: indexPath)

                let columnsCount = Int(self.contentWidth / itemSize.width)
                let column = row % columnsCount
                attributes.frame = CGRect(
                    x: self.sectionInset.left + CGFloat(column) * (itemSize.width + self.minimumInteritemSpacing),
                    y: contentHeight,
                    width: itemSize.width,
                    height: itemSize.height
                )

                attributes.isHidden = false
                // Sometimes cells overlap headers, the code below fixes it
                attributes.transform3D = CATransform3DMakeTranslation(0, 0, -1)
                self.itemsAttributes[section].append(attributes)

                if column == columnsCount - 1 || row == numberOfItems - 1 {
                    self.contentHeight += itemSize.height
                    if row < numberOfItems - 1 && visibleItemIndexPaths.contains(indexPath) {
                        let nextIndexPath = IndexPath(row: indexPath.row + 1, section: indexPath.section)
                        if visibleItemIndexPaths.contains(nextIndexPath) {
                            contentHeight += self.minimumLineSpacing
                        }
                    }
                }
            }
            
            if visibleSections.contains(section) {
                self.contentHeight += self.sectionInset.bottom
            }
            else {
                self.contentHeight += self.minimumSectionSpacing / 2
            }
        }
        
        if self.sectionHeadersPinToVisibleBounds {
            let visibleFrameHeight = collectionView.bounds.size.height + offsetCorrection
            let visibleContentOffset = self.contentHeight - visibleFrameHeight
            for section in 0..<numberOfSections {
                if visibleSections.contains(section) {
                    if self.headersAttributes[section].frame.origin.y < visibleContentOffset {
                        if section <= self.targetSection && section < numberOfSections - 1 && self.headersAttributes[section + 1].frame.origin.y > visibleContentOffset {
                            if section != self.targetSection {
                                self.headersAttributes[section].frame.origin.y = min(
                                    self.headersAttributes[section + 1].frame.origin.y - self.headersAttributes[section].frame.size.height,
                                    visibleContentOffset)
                            }
                            let originY = self.headersAttributes[section].frame.origin.y
                            for i in (0..<section).reversed() {
                                self.headersAttributes[i].frame.origin.y = originY - self.headersAttributes[i].frame.size.height * CGFloat(section - i)
                            }
                        }
                    }
                }
            }
        }
    }
}

private typealias ExpandedLayoutPrivate = ExpandedLayout
private extension ExpandedLayoutPrivate {
    private func sectionHeadersPinToBoundsCorrection(proposedTopOffset: CGFloat,
                                                     estimatedTopOffset: CGFloat) -> CGFloat {
        guard let collectionViewContentOffset = self.collectionView?.contentOffset.y,
            let collectionViewTopInset = self.collectionView?.contentInset.top,
            self.sectionHeadersPinToVisibleBounds else {
                return 0
        }
        
        var topOffsetCorrection: CGFloat = 0
        if proposedTopOffset <= estimatedTopOffset {
            topOffsetCorrection = 0
        }
        else if proposedTopOffset - estimatedTopOffset <= collectionViewTopInset {
            if proposedTopOffset - collectionViewContentOffset >= collectionViewTopInset {
                topOffsetCorrection = proposedTopOffset - estimatedTopOffset
            } else {
                let newProposedTopOffset = proposedTopOffset - (collectionViewContentOffset - estimatedTopOffset)
                topOffsetCorrection = min(newProposedTopOffset, proposedTopOffset) - estimatedTopOffset
            }
        }
        else if proposedTopOffset - collectionViewContentOffset < collectionViewTopInset {
            topOffsetCorrection = proposedTopOffset - collectionViewContentOffset
        }
        else if proposedTopOffset - estimatedTopOffset > collectionViewTopInset {
            topOffsetCorrection = collectionViewTopInset
        }
        topOffsetCorrection = max(topOffsetCorrection, 0)
        return topOffsetCorrection
    }

    private func determineVisibleIndexPaths() -> [IndexPath] {
        guard let collectionView = self.collectionView,
            let delegate = collectionView.delegate as? UICollectionViewDelegateFlowLayout,
            let dataSource = collectionView.dataSource else {
            return []
        }
        
        let visibleFrameHeight = collectionView.bounds.size.height + offsetCorrection
        
        var visibleItems: [IndexPath] = []
        var visibleContentHeight: CGFloat = 0
        
        guard visibleContentHeight < visibleFrameHeight else {
            return visibleItems
        }
        
        let numberOfSections = dataSource.numberOfSections!(in: collectionView)
        for section in self.targetSection..<numberOfSections {
            let headerHeight = delegate.collectionView!(collectionView, layout: self, referenceSizeForHeaderInSection: section).height
            visibleContentHeight += headerHeight
            visibleContentHeight += self.sectionInset.top
            
            guard visibleContentHeight < visibleFrameHeight else {
                return visibleItems
            }
            
            let numberOfItems = dataSource.collectionView(collectionView, numberOfItemsInSection: section)
            for row in 0..<numberOfItems {
                let indexPath = IndexPath(row: row, section: section)
                visibleItems.append(indexPath)
                let itemSize = delegate.collectionView!(collectionView, layout: self, sizeForItemAt: indexPath)

                let columnsCount = Int(self.contentWidth / itemSize.width)
                let column = row % columnsCount

                if column == columnsCount - 1 || row == numberOfItems - 1 {
                    visibleContentHeight += itemSize.height
                    if row < numberOfItems - 1 {
                        visibleContentHeight += self.minimumLineSpacing
                    }
                    guard visibleContentHeight < visibleFrameHeight else {
                        return visibleItems
                    }
                }
            }
            visibleContentHeight += self.sectionInset.bottom
        }
        
        for section in (0..<self.targetSection).reversed() {
            visibleContentHeight += self.sectionInset.bottom
            let numberOfItems = dataSource.collectionView(collectionView, numberOfItemsInSection: section)
            for row in 0..<numberOfItems {
                let indexPath = IndexPath(row: row, section: section)
                visibleItems.append(indexPath)
                let itemSize = delegate.collectionView!(collectionView, layout: self, sizeForItemAt: indexPath)

                let columnsCount = Int(self.contentWidth / itemSize.width)
                let column = row % columnsCount

                if column == columnsCount - 1 {
                    visibleContentHeight += itemSize.height
                    if row > 0 {
                        visibleContentHeight += self.minimumLineSpacing
                    }
                    guard visibleContentHeight < visibleFrameHeight else {
                        return visibleItems
                    }
                }
            }
            visibleContentHeight += self.sectionInset.top
            let headerHeight = delegate.collectionView!(collectionView, layout: self, referenceSizeForHeaderInSection: section).height
            visibleContentHeight += headerHeight
            
            guard visibleContentHeight < visibleFrameHeight else {
                return visibleItems
            }
        }
        
        return visibleItems
    }
    
    private func setRealOffset() {
        guard let collectionView = self.collectionView,
            let delegate = collectionView.delegate as? UICollectionViewDelegateFlowLayout,
            let dataSource = collectionView.dataSource else {
            return
        }
        
        var contentOffset: CGFloat = self.offsetCorrection
        for section in 0..<targetSection {
            let headerHeigth = self.headersAttributes[section].frame.size.height
            contentOffset += headerHeigth
            contentOffset += self.sectionInset.top
            
            let numberOfItems = dataSource.collectionView(collectionView, numberOfItemsInSection: section)
            for row in 0..<numberOfItems {
                let indexPath = IndexPath(row: row, section: section)
                let itemSize = delegate.collectionView!(collectionView, layout: self, sizeForItemAt: indexPath)

                let columnsCount = Int(self.contentWidth / itemSize.width)
                let column = row % columnsCount

                if column == columnsCount - 1 || row == numberOfItems - 1 {
                    contentOffset += itemSize.height
                    if row < numberOfItems - 1 {
                        contentOffset += self.minimumLineSpacing
                    }
                }
            }
            
            contentOffset += self.sectionInset.bottom
        }
        let maxContentOffset = max(self.contentHeight, collectionView.bounds.size.height) - collectionView.bounds.size.height
        contentOffset = min(contentOffset, maxContentOffset)
        collectionView.setContentOffset(CGPoint(x: collectionView.contentOffset.x, y: contentOffset),
                                        animated: false)
    }
}


================================================
FILE: Source/Supporting Files/CampcotCollectionView.h
================================================
//
//  CampcotCollectionView.h
//  CampcotCollectionView
//
//  Created by Vadim Morozov on 1/26/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

#import <UIKit/UIKit.h>

//! Project version number for CampcotCollectionView.
FOUNDATION_EXPORT double CampcotCollectionViewVersionNumber;

//! Project version string for CampcotCollectionView.
FOUNDATION_EXPORT const unsigned char CampcotCollectionViewVersionString[];

// In this header, you should import all the public headers of your framework using statements like #import <CampcotCollectionView/PublicHeader.h>




================================================
FILE: Source/Supporting Files/Info.plist
================================================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>$(DEVELOPMENT_LANGUAGE)</string>
	<key>CFBundleExecutable</key>
	<string>$(EXECUTABLE_NAME)</string>
	<key>CFBundleIdentifier</key>
	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>$(PRODUCT_NAME)</string>
	<key>CFBundlePackageType</key>
	<string>FMWK</string>
	<key>CFBundleShortVersionString</key>
	<string>0.0.8</string>
	<key>CFBundleVersion</key>
	<string>$(CURRENT_PROJECT_VERSION)</string>
	<key>NSPrincipalClass</key>
	<string></string>
</dict>
</plist>


================================================
FILE: Tests/CampcotCollectionViewTests.swift
================================================
//
//  CampcotCollectionViewTests.swift
//  CampcotCollectionViewTests
//
//  Created by Vadim Morozov on 1/26/18.
//  Copyright © 2018 Touchlane LLC. All rights reserved.
//

import XCTest
@testable import CampcotCollectionView

class CampcotCollectionViewTests: XCTestCase {
    
    override func setUp() {
        super.setUp()
        // Put setup code here. This method is called before the invocation of each test method in the class.
    }
    
    override func tearDown() {
        // Put teardown code here. This method is called after the invocation of each test method in the class.
        super.tearDown()
    }
    
    func testExample() {
        // This is an example of a functional test case.
        // Use XCTAssert and related functions to verify your tests produce the correct results.
    }
    
    func testPerformanceExample() {
        // This is an example of a performance test case.
        self.measure {
            // Put the code you want to measure the time of here.
        }
    }
    
}


================================================
FILE: Tests/Supporting Files/Info.plist
================================================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>$(DEVELOPMENT_LANGUAGE)</string>
	<key>CFBundleExecutable</key>
	<string>$(EXECUTABLE_NAME)</string>
	<key>CFBundleIdentifier</key>
	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>$(PRODUCT_NAME)</string>
	<key>CFBundlePackageType</key>
	<string>BNDL</string>
	<key>CFBundleShortVersionString</key>
	<string>1.0</string>
	<key>CFBundleVersion</key>
	<string>1</string>
</dict>
</plist>


================================================
FILE: scripts/deploy.sh
================================================
#!/usr/bin/env bash

source ~/.rvm/scripts/rvm
rvm use default
pod trunk push --verbose | ruby -e 'ARGF.each{ print "." }'
Download .txt
gitextract_0jr27f1c/

├── .gitignore
├── .travis.yml
├── CHANGELOG.md
├── CODEOWNERS
├── CampcotCollectionView.podspec
├── CampcotCollectionView.xcodeproj/
│   ├── project.pbxproj
│   ├── project.xcworkspace/
│   │   └── contents.xcworkspacedata
│   └── xcshareddata/
│       └── xcschemes/
│           └── CampcotCollectionView.xcscheme
├── CampcotCollectionView.xcworkspace/
│   ├── contents.xcworkspacedata
│   └── xcshareddata/
│       ├── IDEWorkspaceChecks.plist
│       └── WorkspaceSettings.xcsettings
├── Example/
│   ├── Example.xcodeproj/
│   │   ├── project.pbxproj
│   │   ├── project.xcworkspace/
│   │   │   ├── contents.xcworkspacedata
│   │   │   └── xcshareddata/
│   │   │       └── IDEWorkspaceChecks.plist
│   │   └── xcshareddata/
│   │       └── xcschemes/
│   │           └── Example.xcscheme
│   └── Source/
│       ├── AppDelegate.swift
│       ├── CustomCollectionViewCell.swift
│       ├── CustomHeaderView.swift
│       ├── Images.xcassets/
│       │   ├── AppIcon.appiconset/
│       │   │   └── Contents.json
│       │   ├── Contents.json
│       │   ├── logo.imageset/
│       │   │   └── Contents.json
│       │   └── logo_splash.imageset/
│       │       └── Contents.json
│       ├── Launch Screen.storyboard
│       ├── Main.storyboard
│       ├── StoryboardViewController.swift
│       ├── Supporting Files/
│       │   └── Info.plist
│       └── ViewController.swift
├── LICENSE
├── README.md
├── Source/
│   ├── CampcotCollectionView.swift
│   ├── CollapsedLayout.swift
│   ├── ContentSizeAdjustmentBehavior.swift
│   ├── ExpandedLayout.swift
│   └── Supporting Files/
│       ├── CampcotCollectionView.h
│       └── Info.plist
├── Tests/
│   ├── CampcotCollectionViewTests.swift
│   └── Supporting Files/
│       └── Info.plist
└── scripts/
    └── deploy.sh
Condensed preview — 38 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (144K chars).
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About this extraction

This page contains the full source code of the touchlane/CampcotCollectionView GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 38 files (130.0 KB), approximately 34.1k tokens. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.

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