與「隱藏= YES」謂詞碰撞

Question

如documentation所列取PHAsset，PHAsset支持​​取鍵。但是，當我試圖獲取隱性資產我的應用程序下面的日誌崩潰：

***終止應用程序由於未捕獲的異常「NSInvalidArgumentException」，理由是：「不支持的謂詞中提取選項：隱藏== 1」

下面是示例代碼：

PHFetchOptions *options = [[PHFetchOptions alloc] init]; 
options.wantsIncrementalChangeDetails = YES; 
options.includeAllBurstAssets = YES; 
options.includeHiddenAssets = YES; 
options.predicate = [NSPredicate predicateWithFormat:@"hidden = YES"]; 

PHFetchResult *fetchResult = [PHAsset fetchAssetsWithOptions:options]; 

return fetchResult; 

Answer 1

我沒有在我的第一個答案仔細閱讀的問題，也許這將有助於

如果你只想要隱藏的專輯爲什麼不使用？ 亞型：PHAssetCollectionSubtypeSmartAlbumAllHidden

PHFetchOptions *options = [[PHFetchOptions alloc] init]; 
options.wantsIncrementalChangeDetails = YES; 
options.includeAllBurstAssets = YES; 
options.includeHiddenAssets = YES; 
options.predicate = [NSPredicate predicateWithFormat:@"mediaType == %d",PHAssetMediaTypeImage]; 

PHFetchResult *albums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeSmartAlbumAllHidden options:nil];