Facebook POP Swift Animation test. Box enlarges and centers on screen on button click.

FacebookPOPAnimationTest.swift

//
//  ViewController.swift
//  FacebookPOPAnimationTest
//
//  Created by Alex Shive on 10/29/14.
//  Copyright (c) 2014 Alex. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

	@IBOutlet weak var box: UIView!
	
	var isFullScreen = true
	
	let size:CGFloat = 3.0
	
	let h:CGFloat = 100.0
	let w:CGFloat = 100.0
	
	var startX:CGFloat = 0
	var startY:CGFloat = 0
	
	override func viewDidLoad() {
		super.viewDidLoad()
		
		startX = box.frame.origin.x + box.frame.size.width/2
		startY = box.frame.origin.y + box.frame.size.height/2
		
		let recognizer = UITapGestureRecognizer(target: self, action:Selector("handleTap:"))
		recognizer.delegate = self
		box.addGestureRecognizer(recognizer)
	}
	
	func handleTap(recognizer: UITapGestureRecognizer) {
		isFullScreen = !isFullScreen
		fullScreenZoomAnimation()
	}
	
	func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer otherGestureRecognizer: UIGestureRecognizer) -> Bool {
		return true
	}
	
	func fullScreenZoomAnimation() {
		
		let baseRect = CGRectMake(startX, startY, w, h)
		
		box.pop_removeAllAnimations()
		
		let positionAnimation = POPSpringAnimation(propertyNamed: kPOPLayerPosition)
		positionAnimation.springBounciness = 10;
		
		let scaleAnimation = POPSpringAnimation(propertyNamed: kPOPLayerScaleXY)
		
		let center = NSValue(CGPoint: self.view.center)
		
		if (!isFullScreen)
		{
			scaleAnimation.toValue = NSValue(CGSize: CGSizeMake(size, size))
			positionAnimation.toValue = center
		}
		else
		{
			scaleAnimation.toValue = NSValue(CGSize: CGSizeMake(1, 1))
			positionAnimation.toValue = NSValue(CGRect: baseRect)
		}
		
		box.layer.pop_addAnimation(positionAnimation, forKey: "positionAnimation")
		box.layer.pop_addAnimation(scaleAnimation, forKey: "scaleAnimation")
		
	}

}