首先自定義一個QBYNavigationController類繼承UINavigationController。接下來就可以在類中做以下幾件事情：

• 1,修改導航控制器的標題文字大小，背景圖片，因為是一次性修改，所以還是在load方法中：

objc

• (void)load{

  UINavigationBar *navBar = [UINavigationBar appearanceWhenContainedIn:self, nil];

  // 只要是通過模型設定,都是通過富文字設定
  // 設定導航條標題 => UINavigationBar
  NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
  attrs[NSFontAttributeName] = [UIFont boldSystemFontOfSize:20];
  [navBar setTitleTextAttributes:attrs];

  // 設定導航條背景圖片
  [navBar setBackgroundImage:[UIImage imageNamed:@"navigationbarBackgroundWhite"] forBarMetrics:UIBarMetricsDefault];

}

- 2，返回按鈕的實現，其中也包括了隱藏tabBar：

```objc```
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{

    if (self.childViewControllers.count > 0) {
        viewController.hidesBottomBarWhenPushed = YES;
        
        viewController.navigationItem.leftBarButtonItem = [UIBarButtonItem backItemWithimage:[UIImage imageNamed:@"navigationButtonReturn"] highImage:[UIImage imageNamed:@"navigationButtonReturnClick"] target:self action:@selector(back) title:@"返回"];
    }
//    正真跳轉
    [super pushViewController:viewController animated:animated];
}

- (void)back{
    [self popViewControllerAnimated:YES];
}

3，如果要返回手勢的話實現協議<UIGestureRecognizerDelegate>，新增下面程式碼即可：

objc

• (void)viewDidLoad{
  [super viewDidLoad];

  self.interactivePopGestureRecognizer.delegate = self;
  }

pragma mark - UIGestureRecognizerDelegate

• (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{

  return self.childViewControllers.count > 1;
  }