Save image in UIImagePickerController - objective-c

Question

I have a small question about how to save a picture in the UIImagePickerController.
I have tried it with the following code:
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image didFinishPickingMediaWithInfo:(NSDictionary *)info {
if (takePhotoSave == 1) {
takePhotoSave = 0;
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
[picker dismissViewControllerAnimated:YES completion:NULL];
} }
I get no errors, but the image is not saved
Thank you very much

Answer 1

NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
[self dismissViewControllerAnimated:NO completion:nil];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsPath = [paths objectAtIndex:0];
if (CFStringCompare ((__bridge_retained CFStringRef) mediaType, kUTTypeImage, 0) == kCFCompareEqualTo){
UIImage* image = [info objectForKey:UIImagePickerControllerOriginalImage];
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
//save to document directory
NSData *pngData = UIImagePNGRepresentation([self imageWithImage:image scaledToSize:CGSizeMake(image.size.width/5, image.size.height/5)]);
NSString *filePath = [documentsPath stringByAppendingPathComponent:#"image_test.png"]; //Add the file name
[pngData writeToFile:filePath atomically:YES]; //Write the file
}
This is everything you need to save to the photos. If you're looking to save it as an uiimage look below:
if ([NSData dataWithContentsOfFile:[self documentsPathForFileName:#"image_test.png"]]) {
NSData* pngData = [NSData dataWithContentsOfFile:[self documentsPathForFileName:#"image_test.png"]];
UIImage* image = [UIImage imageWithData:pngData];
UIImageView* imageView = [[UIImageView alloc] initWithImage:image];
[imageView setFrame:CGRectMake(0.0, 0.0, imageView.image.size.width, imageView.image.size.height)];
[imageView setCenter:self.view.center];
[self.view addSubview:imageView];
}

Answer 2

The problem here seems to be that you are not setting a completion target.
UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);
This works perfectly for me and so should fix your problem.
You can also set a completion target to check that it is being saved correctly:
// Save image
UIImageWriteToSavedPhotosAlbum(image, self, #selector(image:didFinishSavingWithError:), nil);
// Check if there was an error
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error {
// Unable to save the image
if (error) {
}
// All is well
else {
}
}
Hope this helps