首先自定义一个QBYNavigationController类继承UINavigationController。接下来就可以在类中做以下几件事情：
- 1,修改导航控制器的标题文字大小，背景图片，因为是一次性修改，所以还是在load方法中：
objc
-
(void)load{
UINavigationBar *navBar = [UINavigationBar appearanceWhenContainedIn:self, nil];
// 只要是通过模型设置,都是通过富文本设置
// 设置导航条标题 => UINavigationBar
NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
attrs[NSFontAttributeName] = [UIFont boldSystemFontOfSize:20];
[navBar setTitleTextAttributes:attrs];// 设置导航条背景图片
[navBar setBackgroundImage:[UIImage imageNamed:@"navigationbarBackgroundWhite"] forBarMetrics:UIBarMetricsDefault];
}
- 2，返回按钮的实现，其中也包括了隐藏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"];
}
// 正真跳转
[super pushViewController:viewController animated:animated];
}
- (void)back{
[self popViewControllerAnimated:YES];
}
3，如果要返回手势的话实现协议<UIGestureRecognizerDelegate>，添加下面代码即可：
objc
-
(void)viewDidLoad{
[super viewDidLoad];self.interactivePopGestureRecognizer.delegate = self;
}
pragma mark - UIGestureRecognizerDelegate
-
(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
return self.childViewControllers.count > 1;
}
