Repository: LiorNn/DragDropCollectionView
Branch: master
Commit: 5d1d3ef8d82f
Files: 20
Total size: 66.6 KB

Directory structure:
gitextract_dhodvlri/

├── DragDropCollectionView.swift
├── README.md
└── Sample Project/
    ├── DragDrop/
    │   ├── AppDelegate.swift
    │   ├── Base.lproj/
    │   │   ├── LaunchScreen.xib
    │   │   └── Main.storyboard
    │   ├── Images.xcassets/
    │   │   └── AppIcon.appiconset/
    │   │       └── Contents.json
    │   ├── Info.plist
    │   └── ViewController.swift
    ├── DragDrop.xcodeproj/
    │   ├── project.pbxproj
    │   ├── project.xcworkspace/
    │   │   ├── contents.xcworkspacedata
    │   │   ├── xcshareddata/
    │   │   │   └── IDEWorkspaceChecks.plist
    │   │   └── xcuserdata/
    │   │       ├── Lior.xcuserdatad/
    │   │       │   └── UserInterfaceState.xcuserstate
    │   │       └── prog.xcuserdatad/
    │   │           └── UserInterfaceState.xcuserstate
    │   └── xcuserdata/
    │       ├── Lior.xcuserdatad/
    │       │   ├── xcdebugger/
    │       │   │   └── Breakpoints_v2.xcbkptlist
    │       │   └── xcschemes/
    │       │       ├── DragDrop.xcscheme
    │       │       └── xcschememanagement.plist
    │       └── prog.xcuserdatad/
    │           ├── xcdebugger/
    │           │   └── Breakpoints_v2.xcbkptlist
    │           └── xcschemes/
    │               └── xcschememanagement.plist
    └── DragDropTests/
        ├── DragDropTests.swift
        └── Info.plist

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

================================================
FILE: DragDropCollectionView.swift
================================================
//
//  DragDropCollectionView.swift
//  DragDrop
//
//  Created by Lior Neu-ner on 2014/12/30.
//  Copyright (c) 2014 LiorN. All rights reserved.
// 3rd test for git submodule

//Just testing git subtree for the second time
import UIKit

@objc protocol DrapDropCollectionViewDelegate {
    func dragDropCollectionViewDidMoveCellFromInitialIndexPath(_ initialIndexPath: IndexPath, toNewIndexPath newIndexPath: IndexPath)
    @objc optional func dragDropCollectionViewDraggingDidBeginWithCellAtIndexPath(_ indexPath: IndexPath)
    @objc optional func dragDropCollectionViewDraggingDidEndForCellAtIndexPath(_ indexPath: IndexPath)
}

class DragDropCollectionView: UICollectionView, UIGestureRecognizerDelegate {
    weak var draggingDelegate: DrapDropCollectionViewDelegate?
    
    var longPressRecognizer: UILongPressGestureRecognizer = {
        let longPressRecognizer = UILongPressGestureRecognizer()
        longPressRecognizer.delaysTouchesBegan = false
        longPressRecognizer.cancelsTouchesInView = false
        longPressRecognizer.numberOfTouchesRequired = 1
        longPressRecognizer.minimumPressDuration = 0.1
        longPressRecognizer.allowableMovement = 10.0
        return longPressRecognizer
    }()
    
    fileprivate var draggedCellIndexPath: IndexPath?
    var draggingView: UIView?
    fileprivate var touchOffsetFromCenterOfCell: CGPoint?
    var isWiggling = false
    fileprivate let pingInterval = 0.3
    var isAutoScrolling = false
    
    override var intrinsicContentSize: CGSize {
        self.layoutIfNeeded()
        return CGSize(width: UIView.noIntrinsicMetric, height: self.contentSize.height)
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        commonInit()
    }
    
    override init(frame: CGRect, collectionViewLayout layout: UICollectionViewLayout) {
        super.init(frame: frame, collectionViewLayout: layout)
        commonInit()
    }
    
    fileprivate func commonInit() {
        longPressRecognizer.addTarget(self, action: #selector(DragDropCollectionView.handleLongPress(_:)))
        longPressRecognizer.isEnabled = false
        self.addGestureRecognizer(longPressRecognizer)
        
    }
    
    override func reloadData() {
        super.reloadData()
        self.invalidateIntrinsicContentSize()
    }
    
    @objc func handleLongPress(_ longPressRecognizer: UILongPressGestureRecognizer) {
        let touchLocation = longPressRecognizer.location(in: self)
        
        switch (longPressRecognizer.state) {
        case UIGestureRecognizerState.began:
            draggedCellIndexPath = self.indexPathForItem(at: touchLocation)
            if (draggedCellIndexPath != nil) {
                draggingDelegate?.dragDropCollectionViewDraggingDidBeginWithCellAtIndexPath?(draggedCellIndexPath!)
                let draggedCell = self.cellForItem(at: draggedCellIndexPath! as IndexPath) as UICollectionViewCell?
                draggingView = UIImageView(image: getRasterizedImageCopyOfCell(draggedCell!))
                draggingView!.center = (draggedCell!.center)
                self.addSubview(draggingView!)
                draggedCell!.alpha = 0.0
                touchOffsetFromCenterOfCell = CGPoint(x: draggedCell!.center.x - touchLocation.x, y: draggedCell!.center.y - touchLocation.y)
                UIView.animate(withDuration: 0.4, animations: { () -> Void in
                    self.draggingView!.transform = CGAffineTransform(scaleX: 1.3, y: 1.3)
                    self.draggingView!.alpha = 0.8
                })
            }
            
        case UIGestureRecognizerState.changed:
            if draggedCellIndexPath != nil {
                draggingView!.center = CGPoint(x: touchLocation.x + touchOffsetFromCenterOfCell!.x, y: touchLocation.y + touchOffsetFromCenterOfCell!.y)

                if !isAutoScrolling {

                    dispatchOnMainQueueAfter(pingInterval, closure: { () -> () in
                        let scroller = self.shouldAutoScroll(touchLocation)
                        if  (scroller.shouldScroll) {
                            self.autoScroll(scroller.direction)
                            self.isAutoScrolling = true
                        }
                    })
                }
                
                dispatchOnMainQueueAfter(pingInterval, closure: { () -> () in
                    let shouldSwapCellsTuple = self.shouldSwapCells(touchLocation)
                    if shouldSwapCellsTuple.shouldSwap {
                        self.swapDraggedCellWithCellAtIndexPath(shouldSwapCellsTuple.newIndexPath!)
                    }
                })
            }
        case UIGestureRecognizerState.ended:
            if draggedCellIndexPath != nil {
                draggingDelegate?.dragDropCollectionViewDraggingDidEndForCellAtIndexPath?(draggedCellIndexPath!)
                let draggedCell = self.cellForItem(at: draggedCellIndexPath! as IndexPath)
                UIView.animate(withDuration: 0.4, animations: { () -> Void in
                    self.draggingView!.transform = CGAffineTransform.identity
                    self.draggingView!.alpha = 1.0
                    if (draggedCell != nil) {
                        self.draggingView!.center = draggedCell!.center
                    }
                }, completion: { (finished) -> Void in
                    self.draggingView!.removeFromSuperview()
                    self.draggingView = nil
                    draggedCell?.alpha = 1.0
                    self.draggedCellIndexPath = nil
                })
            }
        default: ()
        }
    }
    
    
    func enableDragging(_ enable: Bool) {
        if enable {
            longPressRecognizer.isEnabled = true
        } else {
            longPressRecognizer.isEnabled = false
        }
    }
    
    fileprivate func shouldSwapCells(_ previousTouchLocation: CGPoint) -> (shouldSwap: Bool, newIndexPath: IndexPath?) {
        var shouldSwap = false
        var newIndexPath: IndexPath?
        let currentTouchLocation = self.longPressRecognizer.location(in: self)
        if !Double(currentTouchLocation.x).isNaN && !Double(currentTouchLocation.y).isNaN {
            if distanceBetweenPoints(previousTouchLocation, secondPoint: currentTouchLocation) < CGFloat(20.0) {
                if let newIndexPathForCell = self.indexPathForItem(at: currentTouchLocation) {
                    if newIndexPathForCell != self.draggedCellIndexPath! as IndexPath {
                        shouldSwap = true
                        newIndexPath = newIndexPathForCell 
                    }
                }
            }
        }
        return (shouldSwap, newIndexPath)
    }
    
    fileprivate func swapDraggedCellWithCellAtIndexPath(_ newIndexPath: IndexPath) {
        self.moveItem(at: self.draggedCellIndexPath! as IndexPath, to: newIndexPath as IndexPath)
        let draggedCell = self.cellForItem(at: newIndexPath as IndexPath)!
        draggedCell.alpha = 0
        self.draggingDelegate?.dragDropCollectionViewDidMoveCellFromInitialIndexPath(self.draggedCellIndexPath!, toNewIndexPath: newIndexPath)
        self.draggedCellIndexPath = newIndexPath
    }
    

}

//AutoScroll
extension DragDropCollectionView {
    enum AutoScrollDirection: Int {
        case invalid = 0
        case towardsOrigin = 1
        case awayFromOrigin = 2
    }
    
    func autoScroll(_ direction: AutoScrollDirection) {
        let currentLongPressTouchLocation = self.longPressRecognizer.location(in: self)
        var increment: CGFloat
        var newContentOffset: CGPoint
        if (direction == AutoScrollDirection.towardsOrigin) {
            increment = -50.0
        } else {
            increment = 50.0
        }
        newContentOffset = CGPoint(x: self.contentOffset.x, y: self.contentOffset.y + increment)
        let flowLayout = self.collectionViewLayout as! UICollectionViewFlowLayout
        if flowLayout.scrollDirection == UICollectionView.ScrollDirection.horizontal{
            newContentOffset = CGPoint(x: self.contentOffset.x + increment, y: self.contentOffset.y)
        }
        if ((direction == AutoScrollDirection.towardsOrigin && newContentOffset.y < 0) || (direction == AutoScrollDirection.awayFromOrigin && newContentOffset.y > self.contentSize.height - self.frame.height)) {
            dispatchOnMainQueueAfter(0.3, closure: { () -> () in
                self.isAutoScrolling = false
            })
        } else {
            UIView.animate(withDuration: 0.3
                , delay: 0.0
                , options: UIView.AnimationOptions.curveLinear
                , animations: { () -> Void in
                    self.setContentOffset(newContentOffset, animated: false)
                    if (self.draggingView != nil) {
                        if flowLayout.scrollDirection == UICollectionView.ScrollDirection.vertical{
                            var draggingFrame = self.draggingView!.frame
                            draggingFrame.origin.y += increment
                            self.draggingView!.frame = draggingFrame
                        }else{
                            var draggingFrame = self.draggingView!.frame
                            draggingFrame.origin.x += increment
                            self.draggingView!.frame = draggingFrame
                        }
                    }
                }) { (finished) -> Void in
                    dispatchOnMainQueueAfter(0.0, closure: { () -> () in
                        var updatedTouchLocationWithNewOffset = CGPoint(x: currentLongPressTouchLocation.x, y: currentLongPressTouchLocation.y + increment)
                        if flowLayout.scrollDirection == UICollectionView.ScrollDirection.horizontal{
                            updatedTouchLocationWithNewOffset = CGPoint(x: currentLongPressTouchLocation.x + increment, y: currentLongPressTouchLocation.y)
                        }
                        let scroller = self.shouldAutoScroll(updatedTouchLocationWithNewOffset)
                        if scroller.shouldScroll {
                            self.autoScroll(scroller.direction)
                        } else {
                            self.isAutoScrolling = false
                        }
                    })
            }
        }
    }
    
    func shouldAutoScroll(_ previousTouchLocation: CGPoint) -> (shouldScroll: Bool, direction: AutoScrollDirection) {
        let previousTouchLocation = self.convert(previousTouchLocation, to: self.superview)
        let currentTouchLocation = self.longPressRecognizer.location(in: self.superview)

        if let flowLayout = self.collectionViewLayout as? UICollectionViewFlowLayout {
            if !Double(currentTouchLocation.x).isNaN && !Double(currentTouchLocation.y).isNaN {
                if distanceBetweenPoints(previousTouchLocation, secondPoint: currentTouchLocation) < CGFloat(20.0) {
                    let scrollDirection = flowLayout.scrollDirection
                    var scrollBoundsSize: CGSize
                    let scrollBoundsLength: CGFloat = 50.0
                    var scrollRectAtEnd: CGRect
                    switch scrollDirection {
                    case UICollectionViewScrollDirection.horizontal:
                        scrollBoundsSize = CGSize(width: scrollBoundsLength, height: self.frame.height)
                        scrollRectAtEnd = CGRect(x: self.frame.origin.x + self.frame.width - scrollBoundsSize.width , y: self.frame.origin.y, width: scrollBoundsSize.width, height: self.frame.height)
                    case UICollectionViewScrollDirection.vertical:
                        scrollBoundsSize = CGSize(width: self.frame.width, height: scrollBoundsLength)
                        scrollRectAtEnd = CGRect(x: self.frame.origin.x, y: self.frame.origin.y + self.frame.height - scrollBoundsSize.height, width: self.frame.width, height: scrollBoundsSize.height)
                    }
                    let scrollRectAtOrigin = CGRect(origin: self.frame.origin, size: scrollBoundsSize)
                    if scrollRectAtOrigin.contains(currentTouchLocation) {
                        return (true, AutoScrollDirection.towardsOrigin)
                    } else if scrollRectAtEnd.contains(currentTouchLocation) {
                        return (true, AutoScrollDirection.awayFromOrigin)
                    }
                }
            }
        }
        return (false, AutoScrollDirection.invalid)
    }
}

//Wiggle Animation
extension DragDropCollectionView {
    func startWiggle() {
        
        for cell in visibleCells {
            addWiggleAnimationTo(cell )
        }
        isWiggling = true
    }
    
    func stopWiggle() {
        for cell in visibleCells {
            cell.layer.removeAllAnimations()
        }
        isWiggling = false
    }
    
    override func dequeueReusableCell(withReuseIdentifier identifier: String, for indexPath: IndexPath) -> UICollectionViewCell {
        let cell: AnyObject = super.dequeueReusableCell(withReuseIdentifier: identifier, for: indexPath as IndexPath)
        if isWiggling {
            addWiggleAnimationTo(cell as! UICollectionViewCell)
        } else {
            cell.layer.removeAllAnimations()
        }
        return cell as! UICollectionViewCell
    }
    
    func addWiggleAnimationTo(_ cell: UICollectionViewCell) {
        CATransaction.begin()
        CATransaction.setDisableActions(false)
        cell.layer.add(rotationAnimation(), forKey: "rotation")
        
        cell.layer.add(bounceAnimation(), forKey: "bounce")
        
        CATransaction.commit()
        
    }
    
    fileprivate func rotationAnimation() -> CAKeyframeAnimation {
        
        let animation = CAKeyframeAnimation(keyPath: "transform.rotation.z")
        let angle = CGFloat(0.04)
        let duration = TimeInterval(0.1)
        let variance = Double(0.025)
        animation.values = [angle, -angle]
        animation.autoreverses = true
        animation.duration = self.randomize(duration, withVariance: variance)
        animation.repeatCount = Float.infinity
        return animation
        
    }
    
    fileprivate func bounceAnimation() -> CAKeyframeAnimation {
        let animation = CAKeyframeAnimation(keyPath: "transform.translation.y")
        let bounce = CGFloat(3.0)
        let duration = TimeInterval(0.12)
        let variance = Double(0.025)
        animation.values = [bounce, -bounce]
        animation.autoreverses = true
        animation.duration = self.randomize(duration, withVariance: variance)
        animation.repeatCount = Float.infinity
        return animation
        
    }
    
    fileprivate func randomize(_ interval: TimeInterval, withVariance variance:Double) -> TimeInterval {
        
        let random = (Double(arc4random_uniform(1000)) - 500.0) / 500.0
        return interval + variance * random;
    }
}

//Assisting Functions
extension DragDropCollectionView {
    func getRasterizedImageCopyOfCell(_ cell: UICollectionViewCell) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(cell.bounds.size, false, 0.0)
        cell.layer.render(in: UIGraphicsGetCurrentContext()!)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image!
    }

}

public func dispatchOnMainQueueAfter(_ delay:Double, closure:@escaping ()->Void) {
    DispatchQueue.main.asyncAfter(deadline: DispatchTime.now()+delay, qos: DispatchQoS.userInteractive, flags: DispatchWorkItemFlags.enforceQoS, execute: closure)
}

public func distanceBetweenPoints(_ firstPoint: CGPoint, secondPoint: CGPoint) -> CGFloat {
    let xDistance = firstPoint.x - secondPoint.x
    let yDistance = firstPoint.y - secondPoint.y
    return sqrt(xDistance * xDistance + yDistance * yDistance)
}








================================================
FILE: README.md
================================================
# DragDropCollectionView
A UICollectionView which allows for easy drag and drop to reorder cells. Mimicks the drag and drop on the iOS Springboard when reordering apps (wiggle animation included!).

I have also included automatic scrolling for when the collection view's content does not all fit in the frame

![Alt text](/demo.gif)

Installation
--------------

To use the DragDropCollectionView class in an app, just drag the DragDropCollectionView.swift file into your project.

Protocols and Delegates
--------------
DragDropCollectionView has the following protocol:  

````
@objc protocol DrapDropCollectionViewDelegate: UICollectionViewDelegate
````

This inherits from UICollectionViewDelegate and is to be used in place of the '.delegate' property found in UICollectionView

DragDropCollectionView has the following delegate:  

````
weak var draggingDelegate: DrapDropCollectionViewDelegate?
````

The DragDropCollectionViewDelegate has the following required methods:

````
func dragDropCollectionViewDidMoveCellFromInitialIndexPath(initialIndexPath: NSIndexPath, toNewIndexPath newIndexPath: NSIndexPath)
````

This method should be used in your to 'swap' items in your datasource

The DragDropCollectionViewDelegate has the following optional methods:

````
optional func dragDropCollectionViewDraggingDidBeginWithCellAtIndexPath(indexPath: NSIndexPath)
optional func dragDropCollectionViewDraggingDidEndForCellAtIndexPath(indexPath: NSIndexPath)
````
    

Methods
--------------
Dragging can be easily enabled and disabled using the follwing method:
````
func enableDragging(enable: Bool)
````

To start the wiggle animation, use:

````
func startWiggle()
````

To stop the wiggle animation, use:

````
func stopWiggle()
````


================================================
FILE: Sample Project/DragDrop/AppDelegate.swift
================================================
//
//  AppDelegate.swift
//  DragDrop
//
//  Created by Lior Neu-ner on 2014/12/30.
//  Copyright (c) 2014 LiorN. All rights reserved.
//

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?


    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.
        return true
    }

    func applicationWillResignActive(_ application: UIApplication) {
        // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
        // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
    }

    func applicationDidEnterBackground(_ application: UIApplication) {
        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    }

    func applicationWillEnterForeground(_ application: UIApplication) {
        // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
    }

    func applicationDidBecomeActive(_ application: UIApplication) {
        // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
    }

    func applicationWillTerminate(_ application: UIApplication) {
        // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
    }


}



================================================
FILE: Sample Project/DragDrop/Base.lproj/LaunchScreen.xib
================================================
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="6214" systemVersion="14A314h" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
    <dependencies>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6207"/>
        <capability name="Constraints with non-1.0 multipliers" minToolsVersion="5.1"/>
    </dependencies>
    <objects>
        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner"/>
        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
        <view contentMode="scaleToFill" id="iN0-l3-epB">
            <rect key="frame" x="0.0" y="0.0" width="480" height="480"/>
            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
            <subviews>
                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="  Copyright (c) 2014 LiorN. All rights reserved." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" minimumFontSize="9" translatesAutoresizingMaskIntoConstraints="NO" id="8ie-xW-0ye">
                    <rect key="frame" x="20" y="439" width="441" height="21"/>
                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
                    <nil key="highlightedColor"/>
                </label>
                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="DragDrop" textAlignment="center" lineBreakMode="middleTruncation" baselineAdjustment="alignBaselines" minimumFontSize="18" translatesAutoresizingMaskIntoConstraints="NO" id="kId-c2-rCX">
                    <rect key="frame" x="20" y="140" width="441" height="43"/>
                    <fontDescription key="fontDescription" type="boldSystem" pointSize="36"/>
                    <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
                    <nil key="highlightedColor"/>
                </label>
            </subviews>
            <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
            <constraints>
                <constraint firstItem="kId-c2-rCX" firstAttribute="centerY" secondItem="iN0-l3-epB" secondAttribute="bottom" multiplier="1/3" constant="1" id="5cJ-9S-tgC"/>
                <constraint firstAttribute="centerX" secondItem="kId-c2-rCX" secondAttribute="centerX" id="Koa-jz-hwk"/>
                <constraint firstAttribute="bottom" secondItem="8ie-xW-0ye" secondAttribute="bottom" constant="20" id="Kzo-t9-V3l"/>
                <constraint firstItem="8ie-xW-0ye" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="MfP-vx-nX0"/>
                <constraint firstAttribute="centerX" secondItem="8ie-xW-0ye" secondAttribute="centerX" id="ZEH-qu-HZ9"/>
                <constraint firstItem="kId-c2-rCX" firstAttribute="leading" secondItem="iN0-l3-epB" secondAttribute="leading" constant="20" symbolic="YES" id="fvb-Df-36g"/>
            </constraints>
            <nil key="simulatedStatusBarMetrics"/>
            <freeformSimulatedSizeMetrics key="simulatedDestinationMetrics"/>
            <point key="canvasLocation" x="548" y="455"/>
        </view>
    </objects>
</document>


================================================
FILE: Sample Project/DragDrop/Base.lproj/Main.storyboard
================================================
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
    <device id="retina6_1" orientation="portrait">
        <adaptation id="fullscreen"/>
    </device>
    <dependencies>
        <deployment identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14490.49"/>
        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
    </dependencies>
    <scenes>
        <!--View Controller-->
        <scene sceneID="tne-QT-ifu">
            <objects>
                <viewController id="BYZ-38-t0r" customClass="ViewController" customModule="DragDrop" customModuleProvider="target" sceneMemberID="viewController">
                    <layoutGuides>
                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
                    </layoutGuides>
                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                        <subviews>
                            <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" misplaced="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" translatesAutoresizingMaskIntoConstraints="NO" id="3XC-yT-77i">
                                <rect key="frame" x="535" y="28" width="51" height="31"/>
                                <connections>
                                    <action selector="toggleWiggleWithSender:" destination="BYZ-38-t0r" eventType="valueChanged" id="Lba-dR-HMI"/>
                                </connections>
                            </switch>
                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" misplaced="YES" text="Wiggle" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Huo-f5-Ayv">
                                <rect key="frame" x="454" y="33" width="58" height="21"/>
                                <constraints>
                                    <constraint firstAttribute="width" constant="58" id="fJH-FD-6s1"/>
                                </constraints>
                                <fontDescription key="fontDescription" type="system" pointSize="17"/>
                                <color key="textColor" cocoaTouchSystemColor="darkTextColor"/>
                                <nil key="highlightedColor"/>
                            </label>
                            <collectionView clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="scaleToFill" dataMode="prototypes" translatesAutoresizingMaskIntoConstraints="NO" id="qon-Be-cyL" customClass="DragDropCollectionView" customModule="DragDrop" customModuleProvider="target">
                                <rect key="frame" x="0.0" y="91" width="414" height="771"/>
                                <collectionViewFlowLayout key="collectionViewLayout" minimumLineSpacing="10" minimumInteritemSpacing="10" id="aOa-Ji-BPD">
                                    <size key="itemSize" width="73" height="62"/>
                                    <size key="headerReferenceSize" width="0.0" height="0.0"/>
                                    <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" reuseIdentifier="collectionViewCell" id="G4Y-1C-eVJ">
                                        <rect key="frame" x="0.0" y="0.0" width="73" height="62"/>
                                        <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
                                        <view key="contentView" opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center">
                                            <rect key="frame" x="0.0" y="0.0" width="73" height="62"/>
                                            <autoresizingMask key="autoresizingMask"/>
                                        </view>
                                    </collectionViewCell>
                                </cells>
                                <connections>
                                    <outlet property="dataSource" destination="BYZ-38-t0r" id="w5A-fg-KHE"/>
                                </connections>
                            </collectionView>
                        </subviews>
                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                        <constraints>
                            <constraint firstItem="3XC-yT-77i" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="8" symbolic="YES" id="3QM-cH-Oih"/>
                            <constraint firstAttribute="trailing" secondItem="qon-Be-cyL" secondAttribute="trailing" id="OTe-te-VhB"/>
                            <constraint firstItem="3XC-yT-77i" firstAttribute="centerY" secondItem="Huo-f5-Ayv" secondAttribute="centerY" id="S7V-QC-45J"/>
                            <constraint firstItem="3XC-yT-77i" firstAttribute="trailing" secondItem="8bC-Xf-vdC" secondAttribute="trailingMargin" id="YfL-sm-t64"/>
                            <constraint firstItem="qon-Be-cyL" firstAttribute="top" secondItem="3XC-yT-77i" secondAttribute="bottom" constant="8" symbolic="YES" id="iU0-4L-JXk"/>
                            <constraint firstItem="3XC-yT-77i" firstAttribute="leading" secondItem="Huo-f5-Ayv" secondAttribute="trailing" constant="23" id="ldw-GC-4nP"/>
                            <constraint firstItem="qon-Be-cyL" firstAttribute="bottom" secondItem="wfy-db-euE" secondAttribute="top" id="loV-4y-bmH"/>
                            <constraint firstItem="qon-Be-cyL" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" id="r7R-GF-f6A"/>
                        </constraints>
                    </view>
                    <connections>
                        <outlet property="dragDropCollectionView" destination="qon-Be-cyL" id="I4j-uv-k2o"/>
                    </connections>
                </viewController>
                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
            </objects>
            <point key="canvasLocation" x="489" y="336"/>
        </scene>
    </scenes>
</document>


================================================
FILE: Sample Project/DragDrop/Images.xcassets/AppIcon.appiconset/Contents.json
================================================
{
  "images" : [
    {
      "idiom" : "iphone",
      "size" : "29x29",
      "scale" : "2x"
    },
    {
      "idiom" : "iphone",
      "size" : "29x29",
      "scale" : "3x"
    },
    {
      "idiom" : "iphone",
      "size" : "40x40",
      "scale" : "2x"
    },
    {
      "idiom" : "iphone",
      "size" : "40x40",
      "scale" : "3x"
    },
    {
      "idiom" : "iphone",
      "size" : "60x60",
      "scale" : "2x"
    },
    {
      "idiom" : "iphone",
      "size" : "60x60",
      "scale" : "3x"
    },
    {
      "idiom" : "ipad",
      "size" : "29x29",
      "scale" : "1x"
    },
    {
      "idiom" : "ipad",
      "size" : "29x29",
      "scale" : "2x"
    },
    {
      "idiom" : "ipad",
      "size" : "40x40",
      "scale" : "1x"
    },
    {
      "idiom" : "ipad",
      "size" : "40x40",
      "scale" : "2x"
    },
    {
      "idiom" : "ipad",
      "size" : "76x76",
      "scale" : "1x"
    },
    {
      "idiom" : "ipad",
      "size" : "76x76",
      "scale" : "2x"
    }
  ],
  "info" : {
    "version" : 1,
    "author" : "xcode"
  }
}

================================================
FILE: Sample Project/DragDrop/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>en</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>CFBundleSignature</key>
	<string>????</string>
	<key>CFBundleVersion</key>
	<string>1</string>
	<key>LSRequiresIPhoneOS</key>
	<true/>
	<key>UILaunchStoryboardName</key>
	<string>LaunchScreen</string>
	<key>UIMainStoryboardFile</key>
	<string>Main</string>
	<key>UIRequiredDeviceCapabilities</key>
	<array>
		<string>armv7</string>
	</array>
	<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: Sample Project/DragDrop/ViewController.swift
================================================
//
//  ViewController.swift
//  DragDrop
//
//  Created by Lior Neu-ner on 2014/12/30.
//  Copyright (c) 2014 LiorN. All rights reserved.
//

import UIKit

class ViewController: UIViewController, UICollectionViewDataSource, DrapDropCollectionViewDelegate {
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectionViewCell", for: indexPath as IndexPath) as UICollectionViewCell
        cell.backgroundColor = colors[indexPath.row]
        return cell
    }
    
    func dragDropCollectionViewDidMoveCellFromInitialIndexPath(_ initialIndexPath: IndexPath, toNewIndexPath newIndexPath: IndexPath) {
        let colorToMove = colors[initialIndexPath.row]
        colors.remove(at: initialIndexPath.row)
        colors.insert(colorToMove, at: newIndexPath.row)
    }
    
    @IBOutlet var dragDropCollectionView: DragDropCollectionView!
    var colors: [UIColor] = {
        var randomColors = [UIColor]()
        for i in 1...500 {
            let randomRed = CGFloat(arc4random() % 255) / 255.0
            let randomGreen = CGFloat(arc4random() % 255) / 255.0
            let randomBlue = CGFloat(arc4random() % 255) / 255.0
            randomColors.append(UIColor(red: randomRed, green: randomGreen, blue: randomBlue, alpha: 1.0))
        }
        return randomColors
        }()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        dragDropCollectionView.draggingDelegate = self
        dragDropCollectionView.enableDragging(true)
    }
    
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return colors.count
    }
    
  
    
    @IBAction func toggleWiggle(sender: UISwitch) {
        if sender.isOn {
            
            dragDropCollectionView.startWiggle()
            
        } else {
            dragDropCollectionView.stopWiggle()
        }
    }
}















================================================
FILE: Sample Project/DragDrop.xcodeproj/project.pbxproj
================================================
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================================================
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================================================
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================================================
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================================================
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================================================
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================================================
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================================================
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================================================
FILE: Sample Project/DragDrop.xcodeproj/xcuserdata/Lior.xcuserdatad/xcschemes/xcschememanagement.plist
================================================
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================================================
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================================================
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================================================
FILE: Sample Project/DragDrop.xcodeproj/xcuserdata/prog.xcuserdatad/xcschemes/xcschememanagement.plist
================================================
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================================================
FILE: Sample Project/DragDropTests/DragDropTests.swift
================================================
//
//  DragDropTests.swift
//  DragDropTests
//
//  Created by Lior Neu-ner on 2014/12/30.
//  Copyright (c) 2014 LiorN. All rights reserved.
//

import UIKit
import XCTest

class DragDropTests: 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.
        XCTAssert(true, "Pass")
    }
    
    func testPerformanceExample() {
        // This is an example of a performance test case.
        self.measureBlock() {
            // Put the code you want to measure the time of here.
        }
    }
    
}


================================================
FILE: Sample Project/DragDropTests/Info.plist
================================================
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	<string>en</string>
	<key>CFBundleExecutable</key>
	<string>$(EXECUTABLE_NAME)</string>
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	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
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	<string>6.0</string>
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	<key>CFBundlePackageType</key>
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	<key>CFBundleShortVersionString</key>
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	<key>CFBundleSignature</key>
	<string>????</string>
	<key>CFBundleVersion</key>
	<string>1</string>
</dict>
</plist>