Get the URL of an image made on the fly and saved in the gallery, how?

I allow the user to select an image from the gallery or take pictures with the camera. I would keep the image path in both cases so that I can use it to display the image at a different time.

When a user selects an image from the gallery, I can use

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {


    if([[info valueForKey:@"UIImagePickerControllerMediaType"] isEqualToString:@"public.image"]) {
           NSURL *imageUrl = [info valueForKey:@"UIImagePickerControllerReferenceURL"];

}

}

Instead, if the user takes the photo on the fly, I save it in a roll of photo:

  UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];

  UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);

After saving, I would like to get the corresponding NSURL when the user selected it.

How can i do

EDIT

, . URL-, UIImagePickerControllerReferenceURL. , . , ,

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 

, UIImagePickerControllerReferenceURL URL-.