Save UIImage to Photo Album with writeImageToSavedPhotosAlbum - iphone

Question

I'm trying to save a UIImage to Photo Album. I've tried severl methods the last one is:
-(IBAction)captureLocalImage:(id)sender{
[photoCaptureButton setEnabled:NO];
// Save to assets library
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeImageToSavedPhotosAlbum: imageView.image.CGImage metadata:nil completionBlock:^(NSURL *assetURL, NSError *error2)
{
// report_memory(#"After writing to library");
if (error2) {
NSLog(#"ERROR: the image failed to be written");
}
else {
NSLog(#"PHOTO SAVED - assetURL: %#", assetURL);
}
runOnMainQueueWithoutDeadlocking(^{
// report_memory(#"Operation completed");
[photoCaptureButton setEnabled:YES];
});
}];
}
imageView is a UIImageView which contain the image I want to save.
On log I got "PHOTO SAVED - assetURL: (null)" and the photo doesn't save to library.
What am I doing wrong?

Answer 1

just use this bellow line for save the image in your photo library
UIImageWriteToSavedPhotosAlbum(imageView.image,nil,nil,nil);
:)

Answer 2

For iOS 11+ needs Privacy - Photo Library Additions Usage Description in info.plist
Add NSPhotoLibraryAddUsageDescription in info.plist
Code:
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
Reference

Answer 3

Check out this sample.. which explains how to save photos using assets library..
you can even use..
UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo);
cehck out his link How to save picture to iPhone photo library?

Answer 4

I'm using GPUImage, Apparently there is some kind of problem with the library itself.
The code above is absolutely working. If you want to read more about this issue:
GPUImagePicture with imageFromCurrentlyProcessedOutput doesn't get UIImage

Answer 5

Since iOS 8.1 UIKit framework has the UIImageWriteToSavedPhotosAlbum() function as vishy said.
I use it in this way:
UIImageWriteToSavedPhotosAlbum(myImage, self, "image:didFinishSavingWithError:contextInfo:", nil)
and then
func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
// check error, report image has been saved, ...
}

Answer 6

When you take a photo from camera, then you can save image in picker delegate:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = [info valueForKey:UIImagePickerControllerEditedImage];
[library writeImageToSavedPhotosAlbum:image.CGImage metadata:[info objectForKey:UIImagePickerControllerMediaMetadata] completionBlock:^(NSURL *assetURL, NSError *error) {
...
}];
[picker dismissViewControllerAnimated:YES completion:nil];
}