A unique identifier associated with a player.
- iOS 4.1–13.0Deprecated
- macOS 10.8–10.15Deprecated
- tvOS 9.0–13.0Deprecated
- watchOS 2.0–6.0Deprecated
The player identifier should never be displayed to the player. Use it only as a way to identify a particular player.
Do not make assumptions about the contents of the player identifier string. Its format and length are subject to change.