How to remove a layer when its animation completes?

Question

I am making an iOS App. I have several CALayer objects that eventually will be deleted by a (shrinking) animation. When the animation is completed, and animationDidStop:finished is invoked, I would like to remove the CALayer object from the super view and delete it.

1. But how can I get the CALayer object in animationDidStop:finished? I would have guessed that the CAanimation-object had a pointer to the layer, but I can't find it in the doc.
2. Is there a better way to handle the issue? (Actually, I have several animation objects added to the same layer, and, ideally, I would like to remove the layer only when the last animation completes)

Answer 1

When you create the animation and set the delegate, just pass the CALayer you want to remove with your animation.

As for removing all the animations, you have two options:

1. You can check your CALayer's animationKeys for any existing animations.
2. You can use a CAAnimationGroup and group all your animations together.