A representation of a Photos asset grouping, such as a moment, user-created album, or smart album.
- iOS 8.0+
- macOS 10.13+Beta
- tvOS 10.0+
In the Photos framework, collection objects (including asset collections) do not directly reference their member objects, and there are no other objects that directly reference collection objects. To retrieve the members of an asset collection, fetch them with a
PHAsset class method such as
fetch. To find asset collections, use one of the methods listed in Fetching Asset Collections.
Like assets and collection lists, asset collections are immutable. To create, rename, or delete asset collections, or to add, remove, or rearrange members in an asset collection, create a
PHAsset object within a photo library change block. For details on using change requests and change blocks to update the photo library, see