如何将图片保存至自定义分组(7)

                                                      } failureBlock: completionBlock]; 
 
                                //should be the last iteration anyway, but just in case 
                                return; 
                            } 
                             
                        } failureBlock: completionBlock]; 
} 

-(void)addAssetURL:(NSURL*)assetURL toAlbum:(NSString*)albumName withCompletionBlock:(SaveImageCompletion)completionBlock
{
    __block BOOL albumWasFound = NO;
   
    //search all photo albums in the library
    [self enumerateGroupsWithTypes:ALAssetsGroupAlbum
                        usingBlock:^(ALAssetsGroup *group, BOOL *stop) {

                            //compare the names of the albums
                            if ([albumName compare: [group valueForProperty:ALAssetsGroupPropertyName]]==NSOrderedSame) {
                               
                                //target album is found
                                albumWasFound = YES;