iOS开发——动画编程Swift篇&（四）CABasicAnimation动画

CABasicAnimation动画

 

 1     //CABasicAnimation-不透明度

 2     @IBAction func cabOpacity()

 3     {

 4         let animation = CABasicAnimation(keyPath: "opacity")

 5         

 6         animation!.fromValue = 1.0

 7         animation!.toValue = 0.0

 8         animation.duration = 3.0

 9         self.testImageView.layer.addAnimation(animation, forKey: "Image-opacity")

10         self.testImageView.alpha=0.0;

11     }

12     

13     //开启 clip subview 属性

14     @IBAction func cabExpend()

15     {

16         //从小到下（如果把Mode 属性改成 Center后，此效果为遮照）

17         let animation = CABasicAnimation(keyPath: "bounds.size")

18         animation!.fromValue = NSValue(CGSize: CGSizeMake(2.0, 2.0))

19         animation!.toValue = NSValue(CGSize: self.testImageView.frame.size)

20         animation.duration = 3.0

21         self.testImageView.layer.addAnimation(animation, forKey: "Image-expen")

22     }

23