objective-c - animationDidStop in ios

Question

I'm generating CALayer when user taps the screen. Then I'm translating that layer to certain position using Animation. Then I'm removing it using this code in animationDidStop:

 [mylayer removeFromSuperLayer]; 

Here everything is working fine, but when I tap again before the previous animation stops, my current layer is not removed from the superlayer. How do I removed it under these circumstances?

Answer 1

如果您每次都创建一个新层，那么委托方法将只能删除当前层（即旧层将丢失）

您可以尝试CATransaction begin/commit在动画周围使用对并添加完成块，这样您就可以为每个动画传递图层引用

[CATransaction begin];

[CATransaction setCompletionBlock:^{
    [myLayer removeFromSuperlayer];
}];

//your existing animation code

[CATransaction commit];