Adds a keyframe to the sequence.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 3.0+
An object that defines the value to add. It must have the same class as other value objects stored in the sequence.
The corresponding time.
The new keyframe is appended to the end of the array.