MPMediaItemPropertyComposerPersistentID
The persistent identifier for a composer.
Declaration
let MPMediaItemPropertyComposerPersistentID: StringDiscussion
This value is an NSNumber object that contains a uint64_t (unsigned long long). The value of the MPMediaItemPropertyComposerPersistentID identifier persists across application launches and across syncs that do not change the sync status of the media item. The value is not guaranteed to persist across a sync/unsync/sync cycle.
Can be used to build a media property predicate as described in MPMediaPropertyPredicate.
See Also
Filterable property keys
MPMediaItemPropertyAlbumArtistMPMediaItemPropertyAlbumArtistPersistentIDMPMediaItemPropertyAlbumPersistentIDMPMediaItemPropertyAlbumTitleMPMediaItemPropertyArtistMPMediaItemPropertyArtistPersistentIDMPMediaItemPropertyComposerMPMediaItemPropertyGenreMPMediaItemPropertyGenrePersistentIDMPMediaItemPropertyHasProtectedAssetMPMediaItemPropertyIsCompilationMPMediaItemPropertyIsCloudItemMPMediaItemPropertyMediaTypeMPMediaItemPropertyPersistentIDMPMediaItemPropertyPlayCount