It would be nice if an example could be provided for CAKeyframeAnimation using arrays of images - flipbook style. I looked around for examples of making this work - especially on the iPhone. It took a lot of experimentation to figure out how to set it up properly. I’m sure others could benefit from it.
For example, the fact that the key path attribute has to be “contents” (with an ‘s’) not “content” as it says in the documentation. That alone ate through a whole morning :-)