哪个最好保存照片库中的图像？

Question

I have came across two ideas of saving images from app to photo library.

1. UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo);

2. ALAssetsLibrary

I used the first one but it takes more time to save. Which is fast way to save images in library?

Answer 1

UIImageWriteToSavedPhotosAlbum should be faster but anyway, you should and you have to do it on a background thread to not block the main thread and the UI. Somehow like

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
   UIImageWriteToSavedPhotosAlbum(img.image, nil, nil, nil);
});