iOS 6 Programming Cookbook

13.4. Storing Photos in the Photo Library

Problem

You want to be able to store a photo in the user’s photo library.

Solution

Use the UIImageWriteToSavedPhotosAlbum procedure:

- (void) imageWasSavedSuccessfully:(UIImage *)paramImage
          didFinishSavingWithError:(NSError *)paramError
                       contextInfo:(void *)paramContextInfo{
  
  if (paramError == nil){
    NSLog(@"Image was saved successfully.");
  } else {
    NSLog(@"An error happened while saving the image.");
    NSLog(@"Error = %@", paramError);
  }
  
}

- (void)  imagePickerController:(UIImagePickerController *)picker 
  didFinishPickingMediaWithInfo:(NSDictionary *)info{
  
  NSLog(@"Picker returned successfully.");
  
  NSLog(@"%@", info);
  
  NSString     *mediaType = [info objectForKey:
                             UIImagePickerControllerMediaType];
  
  if ([mediaType isEqualToString:(__bridge NSString *)kUTTypeImage]){

    UIImage *theImage = nil;
    
    if ([picker allowsEditing]){
      theImage = [info objectForKey:UIImagePickerControllerEditedImage];
    } else {
      theImage = [info objectForKey:UIImagePickerControllerOriginalImage];
    }
    
    SEL selectorToCall = 
    @selector(imageWasSavedSuccessfully:didFinishSavingWithError:contextInfo:);
    
    UIImageWriteToSavedPhotosAlbum(theImage,
                                   self, 
                                   selectorToCall, 
                                   NULL);
    
  }
  
  [picker dismissModalViewControllerAnimated:YES];
  
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
  
  NSLog(@"Picker was cancelled");
  [picker dismissModalViewControllerAnimated:YES];
  
}- (void)viewDidLoad{
  [super viewDidLoad];
  
  if ([self isCameraAvailable] &&
      [self doesCameraSupportTakingPhotos]){
    
    UIImagePickerController ...