UICollectionView cell touches animation.

CollectionViewCell.swift

//
//  CollectionViewCell.swift
//  CollectionTest
//
//  Created by Marcel Stolin on 08.05.15.
//  Copyright (c) 2015 Marcel Stolin. All rights reserved.
//

import UIKit

// MARK: CollectionViewCellDelegate protocol

@objc protocol CollectionViewCellDelegate {
    optional func collectionViewCellTouchesBegan(cell: CollectionViewCell, event: UIEvent)
    optional func collectionViewCellTouchesCancelled(cell: CollectionViewCell, event: UIEvent)
    optional func collectionViewCellTouchesEnded(cell: CollectionViewCell, event: UIEvent)
}

// MARK: CollectionViewCell class

class CollectionViewCell: UICollectionViewCell {
    
    // MARK: IBOutlets
    
    @IBOutlet weak var wrapper: UIView!
    
    // MARK: Internal properties
    
    internal var delegate: CollectionViewCellDelegate?
    
    // MARK: Super override
    
    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    
    // MARK: Touches
    
    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
        // scale the view a little bit
        UIView.animateWithDuration(0.4, animations: { () -> Void in
            self.wrapper.transform = CGAffineTransformMakeScale(0.9, 0.9)
        })
        
        // run the delegate method
        if let cellDelegate = self.delegate {
            cellDelegate.collectionViewCellTouchesBegan?(self, event: event)
        }
    }
    
    override func touchesCancelled(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        // back to the roots
        UIView.animateWithDuration(0.4, animations: { () -> Void in
            self.wrapper.transform = CGAffineTransformMakeScale(1, 1)
        })
        
        // run the delegate method
        if let cellDelegate = self.delegate {
            cellDelegate.collectionViewCellTouchesCancelled?(self, event: event)
        }
    }
    
    override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {
        // back to the roots
        UIView.animateWithDuration(0.4, animations: { () -> Void in
            self.wrapper.transform = CGAffineTransformMakeScale(1, 1)
        })
        
        // run the delegate method
        if let cellDelegate = self.delegate {
            cellDelegate.collectionViewCellTouchesEnded?(self, event: event)
        }
    }
    
}

CollectionViewController.swift

//
//  CollectionViewController.swift
//  CollectionTest
//
//  Created by Marcel Stolin on 08.05.15.
//  Copyright (c) 2015 Marcel Stolin. All rights reserved.
//

import UIKit

class CollectionViewController: UICollectionViewController, CollectionViewCellDelegate {

    // MARK: UICollectionViewDataSource

    override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
        return 1
    }


    override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return 14
    }
    
    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
        var size = CGSizeZero
        
        // just a test size
        size.width = self.view.frame.width / 2 - 15
        size.height = size.width
        
        return size
    }

    override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("BasicCell", forIndexPath: indexPath) as! CollectionViewCell
        cell.delegate = self
    
        return cell
    }
    
    // MARK: CollectionViewCellDelegate
    
    func collectionViewCellTouchesBegan(cell: CollectionViewCell, event: UIEvent) {
        println("tochesBegan")
    }
    
    func collectionViewCellTouchesCancelled(cell: CollectionViewCell, event: UIEvent) {
        println("tochesCancelled")
    }
    
    func collectionViewCellTouchesEnded(cell: CollectionViewCell, event: UIEvent) {
        println("tochesEnded")
        if let cView = self.collectionView {
            // maybe perform a segue
            println("\(cView.indexPathForCell(cell))")
        }
    }

}