UIImagePickerController's didFinishPickingMediaWithInfo is too slow, can I add progressHUD/indicator?

For the UIImagePickerController, I opened the

picker.allowsEditing = YES;

so that user can move and scale the photo, after capturing or selecting from album. Once the "choose" or "use" is clicked, the whole app is frozen for more than 5 seconds, and then goes back with the photos, through

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

I tried to add an indicator in this delegate function, but it doesn't appear... I guess, the long delay happens before this callback, and is probably because of the "editing" from ful

Is there any possible way to handle this? I just wish to give the users a good experience. :)

Thanks a lot!!