Posted when a movie player is about to enter full-screen mode. The
user dictionary contains keys whose values describe the transition animation used to enter full-screen mode. See Fullscreen Notification Keys.
- iOS 3.2–9.0Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- Media Player
A movie player can enter full screen mode programmatically (see the
set method) or by user interaction. The movie player whose state has changed is available as the object associated with the notification.