iOS开发——动画编程Swift篇&（五）CAKeyframeAnimation

 1     //CAKeyframeAnimation-关键针动画
 2     @IBAction func cakFly()
 3     {
 4         let animation = CAKeyframeAnimation(keyPath: "position")
 5         
 6         //设置5个位置点
 7         let p1 = CGPointMake(0.0, 0.0)
 8         let p2 = CGPointMake(320, 0.0)
 9         let p3 = CGPointMake(0, 460.0)
10         let p4 = CGPointMake(320.0, 460.0)
11         let p5 = CGPointMake(160.0, 200.0)
12         
13         //赋值
14         animation.values = [NSValue(CGPoint: p1),NSValue(CGPoint: p2),NSValue(CGPoint: p3),NSValue(CGPoint: p4),NSValue(CGPoint: p5)]
15         
16         
17         //每个动作的 时间百分比
18         animation.keyTimes = [NSNumber(float: 0.0),NSNumber(float: 0.4),NSNumber(float: 0.6),NSNumber(float: 0.8),NSNumber(float: 1.0)]
19       
20         animation.delegate = self
21         animation.duration = 5.0
22         
23         self.testImageView.layer.addAnimation(animation, forKey: "Image-Fly")
24     }
25     
26     //动画代理
27     override func animationDidStart(anim: CAAnimation!)
28     {
29         //动画开始
30     }
31     
32    override func animationDidStop(anim: CAAnimation!, finished flag: Bool)
33     {
34         //动画结束
35     }