1,CABasicAnimation类只有三个属性:
fromValue:开始值
toValue:结束值
Duration:动画的时间
2,通过animationWithKeyPath键值对的方式设置不同的动画效果
transform.scale
transform.scale.x
transform.scale.y
transform.rotation.z
opacity
margin
zPosition
backgroundColor
cornerRadius
borderWidth
bounds
contents
contentsRect
cornerRadius
frame
hidden
mask
masksToBounds
opacity
position
shadowColor
shadowOffset
shadowOpacity
shadowRadius
3,使用样例
(1)改变透明度动画(逐渐消失)
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let animation = CABasicAnimation (keyPath: "opacity" ) animation.fromValue = 1.0 animation.toValue = 0.0 animation.duration = 3.0 self .imageView.layer.addAnimation(animation, forKey: "Image-opacity" ) self .imageView.alpha = 0 |
(2)从小变大动画(还原为默认尺寸)
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let animation = CABasicAnimation (keyPath: "bounds.size" ) animation.fromValue = NSValue ( CGSize : CGSizeMake (2.0, 2.0)) animation.toValue = NSValue ( CGSize : self .imageView.frame.size) animation.duration = 3.0 self .imageView.layer.addAnimation(animation, forKey: "Image-expend" ) |