Learning CA app for iPhone and iPad

Hello everyone
When processing a project, if you find too many parameters in the Core Animation API, you cant quickly know the effect of each parameter. And its hard to find the one you need, you can try this app.
I made this app and it explored most of the features of Apples Core Animation API.
The entire application includes:
●CALayer
●CAScrollLayer
●CATextLayer
●AVAudioPlayer
●CAGradientLayer
●CAReplicatorLayer
●CATiledLayer
●CAShapeLayer
●CAEAGLLayer
●CATransformLayer
●CAEmitterLayer
I set up Apple native controls for each category, I can directly manipulate the properties of the class and observe the effects.
This is a very friendly app for Apple novice developers, I hope to help you.
Thank you for your use.