//开启 push视图 右滑手势()
  fileprivate func openSwipe(){
  if(self.navigationController != nil){
    self.navigationController!.interactivePopGestureRecognizer!.delegate = self;
  }

  }

  func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {

    if self.navigationController?.viewControllers.count == 1{
      return false;
    }
    return true;
  }

extension BaseNavigationController:UIGestureRecognizerDelegate{

  override func viewDidLoad() {
    super.viewDidLoad()
    self.interactivePopGestureRecognizer?.delegate = self
  }
  func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
    if self.navigationController?.viewControllers.count == 1{
      return false;
    }
    return true;
  }

}

-(void)viewWillAppear:(BOOL)animated{
    [self.navigationController setNavigationBarHidden:YES animated:true];
}

-(void)viewWillDisappear:(BOOL)animated{
 [self.navigationController setNavigationBarHidden:NO animated:false];
}

 override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(false);
    self.navigationController?.setNavigationBarHidden(true, animated: true)


  }
  override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated);
    self.navigationController?.navigationBar.isHidden = false;
  }