CATransaction completion being called immediately

caanimation, ios

Solution

I'm not sure if this really is the correct fix, but by setting the completion-block before adding the animation for the layer, the completion-block is consistently called at the correct time.

[CATransaction begin];
[CATransaction setCompletionBlock:completionBlock];
[self.view.layer addAnimation:self.dropAndBounceAnimation forKey:@"appearance"];
[CATransaction commit];

Problem

I'm trying to execute a completion-block after my CAAnimation has finished. However, it seems that animation block is called before my animation completes. The animation still happens correctly though. ``` [CATransaction begin]; [self.view.layer addAnimation:self.dropAndBounceAnimation forKey:@"appearance"]; [CATransaction setCompletionBlock:completionBlock]; [CATransaction commit]; ``` The dropAndBounceAnimation is a CAKeyFrameAnimation on position.y, with a fixed duration.

Original source