Toggle status bar and navigation bar together

gistfile1.m

- (IBAction)handleTap:(id)sender
{
   BOOL isHiding = !_statusBarHidden;
   _statusBarHidden = isHiding;
   
   [UIView animateWithDuration:UINavigationControllerHideShowBarDuration delay:0 options:0
                    animations:^{
                       [self setNeedsStatusBarAppearanceUpdate];
                    }
                    completion:NULL];
   
   if (!isHiding)
   {
      NSLog(@"Hidden");
      [self.navigationController setNavigationBarHidden:NO animated:YES];
   }
   else
   {
      NSLog(@"not hidden");
      [self.navigationController setNavigationBarHidden:YES animated:YES];
   }
}

#pragma mark - Bar Appearance

- (BOOL)prefersStatusBarHidden {
   return _statusBarHidden;
}

- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation
{
   return UIStatusBarAnimationSlide;
}

Have you found a way to fade both the navigation bar and the status bar, rather than slide them away?