Flippy Flippy

gistfile1.m

-(void) flipViews
{
  // Animate the flipping of the current view to the opposite view.
  UIView *fromView, *toView;
  UIViewAnimationOptions flipDirection;
  NSString *newButtonTitle;
  if (mapView.superview)
  {
    fromView = mapView;
    toView = moreView;
    newButtonTitle = NSLocalizedString(@"Map", @"Map");
    flipDirection = UIViewAnimationOptionTransitionFlipFromRight;
  }
  else
  {
    fromView = moreView;
    toView = mapView;    
    newButtonTitle = NSLocalizedString(@"More", @"More");
    flipDirection = UIViewAnimationOptionTransitionFlipFromLeft;
  }
  [UIView transitionFromView:fromView toView:toView duration:1.0 options:UIViewAnimationOptionCurveLinear | flipDirection completion:^(BOOL finished) {
      self.navigationItem.leftBarButtonItem.title = newButtonTitle;
  }];
}