Creates a new music event iterator.
- iOS 5.0+
- macOS 10.0+
- tvOS 9.0+
The music track to iterate over.
On output, the newly created music event iterator.
A result code.
A newly-created music event iterator points at the first event on the music track specified in the
If you edit a music track after associating it with a music event iterator, you must discard iterator and create a new one. Perform the following steps after editing the track: