How to get only images in the camera roll using Photos Framework

After adding the Camera Roll and Photo Stream albums, Apple added the following PHAssetCollectionSubtype types in iOS 8.1: PHAssetCollectionSubtypeAlbumMyPhotoStream (together with PHAssetCollectionTypeAlbum) – fetches the Photo Stream album. PHAssetCollectionSubtypeSmartAlbumUserLibrary (together with PHAssetCollectionTypeSmartAlbum) – fetches the Camera Roll album. Haven’t tested if this is backward-compatible with iOS 8.0.x though.