save many photos

[fairzy]

only the first image saved when trying to save several photos using for loop

[fairzy]

hi, i tried your code and it seems that if there is no album named as 'kKYCustomPhotoAlbumName_' defined before saving photos, just a few photos are saved, not all of them.

[Kjuly]

That's right, I tried & it gave me the same issue. I'll try to fix it later. Thanks! :)

[Kjuly]

As you said, when there's no photo album available, only part images are saved in a for loop. I tested the code and found that -addAssetsGroupAlbumWithName:resultBlock:failureBlock: will process asynchrony, this method will be dispatched several times when the album is not created (this might take some time).

In this case, you can just create a photo album before image adding process:

[self.assetsLibrary addAssetsGroupAlbumWithName:kKYCustomPhotoAlbumName_
                                    resultBlock:nil
                                   failureBlock:nil];

Like the code below:

// manage tasks in background thread
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
  // The completion block to be executed after image taking action process done
  void (^completionBlock)(NSURL *, NSError *) = ^(NSURL *assetURL, NSError *error) {
    if (error) NSLog(@"!!!ERROR,  write the image data to the assets library (camera roll): %@",
                     [error description]);
    NSLog(@"*** URL %@ | %@ || type: %@ ***", assetURL, [assetURL absoluteString], [assetURL class]);
    // Add new one to |photos_|
    [self.photos addObject:[assetURL absoluteString]];
    // Reload tableview data
    [self.tableView reloadData];
  };

  void (^failureBlock)(NSError *) = ^(NSError *error) {
    if (error == nil) return;
    NSLog(@"!!!ERROR, failed to add the asset to the custom photo album: %@", [error description]);
  };

  // save image to custom photo album
  if (! self.assetsLibrary) assetsLibrary_ = [[ALAssetsLibrary alloc] init];

  // create a photo album before image adding process
  [self.assetsLibrary addAssetsGroupAlbumWithName:kKYCustomPhotoAlbumName_
                                    resultBlock:nil
                                   failureBlock:nil];

  // add images via a for loop
  for (int i = 1; i <= 5; ++i)
    [self.assetsLibrary saveImage:[UIImage imageNamed:[NSString stringWithFormat:@"Default-568h%d.png", i]]
                          toAlbum:kKYCustomPhotoAlbumName_
                  completionBlock:completionBlock
                     failureBlock:failureBlock];
}); 

[fairzy]

ok, got it,,,