创建一个界面，就像这样的：
顶部是一个UISegmentControl，用来制定transform的类型。分别是：CGAffineTransformMakeTranslation、CGAffineTransformTranslate、CGAffineTransformIdentity.
然后是一个UILabel，这个Label实时的显示当前的动画类型是什么。
桔色的是动画的View。
最下面是一个按钮，按这个按钮桔色的View开始执行动画。
其他的，蓝色的线就是这几个View的Constraints。指定这几个view的定位是如何的，比如，相对于顶部的距离，相对于左边的距离，右边的距离等。
配置好页面上的View之后，给这些View在Controller中指定对应的对象。并在nib文件中指定各个View的事件。
View在controller中对应的对象：
@IBOutlet weak var animationView: UIView! @IBOutlet weak var animationLabel: UILabel!
UISegmentControl的事件：
@IBAction func segmentAction(sender: AnyObject) { var segmentControl = sender as UISegmentedControl animationType = segmentControl.selectedSegmentIndex }
运行动画的按钮的事件：
@IBAction func runAction(sender: AnyObject) { var distance: CGFloat = 30 switch animationType { case 0: self.animationLabel.text = "CGAffineTransformMakeTranslation" UIView.animateWithDuration(1.0, animations: { self.animationView.transform = CGAffineTransformMakeTranslation(distance, 0) }) case 1: self.animationLabel.text = "CGAffineTransformTranslate" UIView.animateWithDuration(1.0, animations: { self.animationView.transform = CGAffineTransformTranslate(self.animationView.transform, distance, 0) }) case 2: self.animationLabel.text = "CGAffineTransformIdentity" UIView.animateWithDuration(1.0, animations: { self.animationView.transform = CGAffineTransformTranslate(CGAffineTransformIdentity, distance, 0) }) default: println("") } }
在ViewDidLoad设置选择的动画的类型，这里我们不直接取UISegmentControl的selectedIndex的值。所以，在ViewDidLoad方法内设定默认值是1（即选定到是第一个）。
全部代码：
// // ViewController.swift // TransformDemo // // Created by Bruce Lee on 30/11/14. // Copyright (c) 2014 Dynamic Cell. All rights reserved. // // QQ:1828099940, 群:58099570 欢迎加入讨论 // import UIKit class ViewController: UIViewController { @IBOutlet weak var animationView: UIView! @IBOutlet weak var animationLabel: UILabel! var animationType: Int! override func viewDidLoad() { super.viewDidLoad() animationType = 0 } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() // Dispose of any resources that can be recreated. } @IBAction func segmentAction(sender: AnyObject) { var segmentControl = sender as UISegmentedControl animationType = segmentControl.selectedSegmentIndex } @IBAction func runAction(sender: AnyObject) { var distance: CGFloat = 30 switch animationType { case 0: self.animationLabel.text = "CGAffineTransformMakeTranslation" UIView.animateWithDuration(1.0, animations: { self.animationView.transform = CGAffineTransformMakeTranslation(distance, 0) }) case 1: self.animationLabel.text = "CGAffineTransformTranslate" UIView.animateWithDuration(1.0, animations: { self.animationView.transform = CGAffineTransformTranslate(self.animationView.transform, distance, 0) }) case 2: self.animationLabel.text = "CGAffineTransformIdentity" UIView.animateWithDuration(1.0, animations: { self.animationView.transform = CGAffineTransformTranslate(CGAffineTransformIdentity, distance, 0) }) default: println("") } } }
