CoreAnimation - Opacity Fade In and Out Animation Not Working

Question

I\'m attempting to create a fairly simple CoreAnimation for use in an AVComposition. My goal is to create a CALayer which, through various sublayer

Answer 1

The core of the problem was not understanding the keyTimes property of a CAKeyframeAnimation. This question clarified it all and set me down the right path:

What kind of value is keyTime in an CAKeyFrameAnimation?