The second track in the association is considered an appropriate default for the first track.
SDKs
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Framework
- AVFoundation
Declaration
const AVTrack Association Type AVTrackAssociationTypeSelectionFollower;
Discussion
An association from one track to another specifying that when the user selects the first track, the second should be considered an appropriate default selection. For example, a follower for an audio track could be a subtitle track in the same language. When the user chooses a language for audio, the subtitle language “follows” the audio language selection.