IOS CABasicAniamtion keypath:frame无效

Question

IOS CABasicAniamtion keypath:frame无效

写出如上方法并未出现任何动画效果。

Answer 1

CABasicAniamtion是关键帧动画，操作的是layer层，而frame是view层的属性值。要使用CABasicAniamtion做视图的frame变化，你可以通过bounds和position来操作，如：

 CABasicAnimation *animation=[CABasicAnimation animationWithKeyPath:@"position"];
animation.duration=0.6;
animation.repeatCount=1;
animation.delegate=self;
animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
animation.fromValue=[NSValue valueWithCGPoint:self.layer.position];
animation.toValue=[NSValue valueWithCGPoint:rect.origin];
[self.layer addAnimation:animation forKey:@"frameChange"];

你做关键帧动画，要首先看下view和layer的区别，其动画实现所操作的层次是不一样的