如何将图片保存至自定义分组(3)

                        withCompletionBlock:completionBlock];
                         
                      }];
}
[plain]
-(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; 
                                 
                                //get a hold of the photo's asset instance 
                                [self assetForURL: assetURL  
                                      resultBlock:^(ALAsset *asset) {