如何让一个UIViewController页面不知不觉的消失于UINavigationController

继承于UINavigationController，我们创建一个子类YYYNaviController。

然后其他页面都使用这个YYYNaviController initRoot。

初级

重新实现下面父类pop方法。有可能有些页面偷偷的执行了pop

- (UIViewController *)popViewControllerAnimated:(BOOL)animated{
    UIViewController *vv = [super popViewControllerAnimated:animated];
    return  vv;
}

- (NSArray<UIViewController *> *)popToRootViewControllerAnimated:(BOOL)animated{
    NSArray *vs = [super popToRootViewControllerAnimated:animated];
    //nil ?
    return vs;
}
- (NSArray<UIViewController *> *)popToViewController:(UIViewController *)viewController animated:(BOOL)animated{
    return  [super popToViewController:viewController animated:animated];
}

中级

对属性下手，重写set get

@property(nonatomic,copy) NSArray<__kindof UIViewController *> *viewControllers; // The current view controller stack.

-(void)setViewControllers:(NSArray<__kindof UIViewController *> *)viewControllers{

    [super setViewControllers:viewControllers];
}

- (NSArray<UIViewController *> *)viewControllers{
    return [super viewControllers];
}

高级

重写这个方法

- (void)setViewControllers:(NSArray<UIViewController *> *)viewControllers animated:(BOOL)animated NS_AVAILABLE_IOS(3_0); // If animated is YES, then simulate a push or pop depending on whether the new top view controller was previously in the stack.

检测方法：重写方法 & 去掉实现代码

- (void)setViewControllers:(NSArray<UIViewController *> *)viewControllers animated:(BOOL)animated{
    //去掉就不行了
}