如何将图片保存至自定义分组(5)

                            if (group==nil && albumWasFound==NO) { 
                                //photo albums are over, target album does not exist, thus create it 
                                 
                                __weak ALAssetsLibrary* weakSelf = self; 
 
                                //create new assets album 
                                [self addAssetsGroupAlbumWithName:albumName  
                                                      resultBlock:^(ALAssetsGroup *group) { 
                                                                   
                                                          //get the photo's instance 
                                                          [weakSelf assetForURL: assetURL  
                                                                        resultBlock:^(ALAsset *asset) {