---
title: selectionFollower
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avassettrack/associationtype/selectionfollower
---

# selectionFollower

An association between two tracks that specifies when a user selects the main track, the system should follow that selection by automatically selecting the associated track.

## Declaration

```swift
static let selectionFollower: AVAssetTrack.AssociationType
```

## Discussion

Discussion For example, a follower of 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.

## See Also

### Track association types

- [audioFallback](avfoundation/avassettrack/associationtype/audiofallback.md)
- [chapterList](avfoundation/avassettrack/associationtype/chapterlist.md)
- [forcedSubtitlesOnly](avfoundation/avassettrack/associationtype/forcedsubtitlesonly.md)
- [metadataReferent](avfoundation/avassettrack/associationtype/metadatareferent.md)
- [timecode](avfoundation/avassettrack/associationtype/timecode.md)
- [renderMetadataSource](avfoundation/avassettrack/associationtype/rendermetadatasource.md)