Immediately plays the available media data at the specified rate.
- iOS 10.0+
- macOS 10.12+
- tvOS 10.0+
The specified playback rate.
This method plays the available media data at the specified
rate regardless of whether there is sufficient media buffered to ensure smooth playback. If media data exists in the playback buffer, calling this method changes the player’s playback rate to the specified
rate and its
time to a value of
playing. If the player has insufficient media data buffered to begin playback, the player will behave as if it has encountered a stall during playback, except that no
AVPlayer will be posted.