- iOS 2.0+
- macOS 10.5+
- tvOS 9.0+
- Core Animation
An object that manages image-based content and allows you to perform animations on that content
Methods your app can implement to respond to layer related events.
A representation of a single layout constraint between two layers.
Methods that allow an object to manage the layout of a layer and its sublayers.
An object that provides a constraint-based layout manager.