CAAnimationGroup allows multiple animations to be grouped and run concurrently. The grouped animations run in the time space specified by the
- iOS 2.0+
- macOS 10.5+
- tvOS 9.0+
The duration of the grouped animations are not scaled to the duration of their CAAnimationGroup. Instead, the animations are clipped to the duration of the animation group. For example, a 10 second animation grouped within an animation group with a duration of 5 seconds will only display the first 5 seconds of the animation.