Specifies the animations to coordinate with the active focus animation.
- iOS 9.1+
- tvOS 9.0+
The animation to be run.
A block object to be executed after the main animation completes. Any animations specified are run in the same animation context as the main animation.
Use this method to coordinate your custom animations with the system animations for adding or removing focus.
Unless the duration time is inherited, the specified animations may not run in the same context as the main animation. It is perfectly legitimate to specify only a completion block.