我需要显示包含图像数量的相机胶卷相册。我正在使用以下代码获取相机胶卷相册。letsmartCollections=PHAssetCollection.fetchAssetCollectionsWithType(.SmartAlbum,subtype:.SmartAlbumUserLibrary,options:nil)smartCollections.enumerateObjectsUsingBlock{object,index,stopinifletcollection=objectas?PHAssetCollection{print(collection.estimatedAsse