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# snapshotsOutOfSyncNotification

A notification the system posts when the snapshot objects provided by this timeline become out of sync with the current timeline state.

```
class let snapshotsOutOfSyncNotification: NSNotification.Name
```

## Topics

### User-information keys

[`snapshotsOutOfSyncReasonKey`](/documentation/AVFoundation/AVPlayerItemIntegratedTimeline/snapshotsOutOfSyncReasonKey)

A key to retrieve the reason for an out-of-sync state notification.

[`AVPlayerIntegratedTimelineSnapshotsOutOfSyncReason`](/documentation/AVFoundation/AVPlayerIntegratedTimelineSnapshotsOutOfSyncReason)

Constants that represent the reason for an out-of-sync state.


---

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