在Photos.app崩潰中檢索照片相冊（ALAssetsGroup）的名稱

Question

我試圖獲取所有相冊的名稱。這是我所做的。

的方法[group valueForKey:ALAssetsGroupPropertyName]崩潰

ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc] init]; 
[assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos | ALAssetsGroupAlbum 
          usingBlock:^(ALAssetsGroup *group, BOOL *stop) { 

           if (nil != group) 
           { 
            NSLog(@"name %@",[group valueForKey:ALAssetsGroupPropertyName]);  
           } 
           *stop = NO; 
          } failureBlock:^(NSError *error) { 
           NSLog(@"error: %@", error); 
          }]; 

我真的不知道爲什麼會崩潰，如果有人知道，我會很感激一些幫助！

這裏是崩潰日誌：

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<ALAssetsGroup 0x17801ff90> valueForUndefinedKey:]: this class is not key value coding-compliant for the key ALAssetsGroupPropertyName.` 

Answer 1

要調用錯誤的方法。更改此：

NSLog(@"name %@",[group valueForKey:ALAssetsGroupPropertyName]); 

到：

NSLog(@"name %@",[group valueForProperty:ALAssetsGroupPropertyName]);