track(withTrackID:)
Retrieves a track in the movie that contains the specified identifier.
Declaration
func track(withTrackID trackID: CMPersistentTrackID) -> AVFragmentedMovieTrack?Parameters
- trackID:
The persistent track identifier.
Return Value
A movie track, or nil if there is no track with the identifier.
Discussion
Apple discourages using this method in iOS 15, tvOS 15, macOS 12, and watchOS 8 or later. Load a track asynchronously using loadTrack(withTrackID:completionHandler:) instead.