var animation = CATransition()
    animation.duration = 0.3
    animation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
    animation.type = kCATransitionFade
    self.navigationController?.navigationBar.layer.addAnimation(animation, forKey: nil)
    self.navigationController?.navigationBar
      .setBackgroundImage(UIImage(named: "enjory_menubar"), forBarMetrics: UIBarMetrics.Default)