在 Photos.app 崩溃中检索相册 (ALAssetsGroup) 的名称

Question

我正在尝试获取所有专辑名称。这就是我所做的。

方法[group valueForKey:ALAssetsGroupPropertyName]崩溃

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);
                             }];

我真的不知道为什么会崩溃，如果有人知道，我将非常感谢一些帮助！

这是崩溃日志：

*** 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

你调用了错误的方法。改变这个：

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

到：

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