Question

我正在使用标签栏控制器显示自定义标签栏。

为视图控制器创建单独的navigationController。

First *firstViewController = [[First alloc]init];
UINavigationController *firstNavController = [[UINavigationController alloc]initWithRootViewController:firstViewController];

Second *secondViewController = [[Second alloc]init];
UINavigationController *secondNavController = [[UINavigationController alloc]initWithRootViewController:secondViewController];

Third *thirdViewController = [[Third alloc]init];
UINavigationController *thirdNavController = [[UINavigationController alloc]initWithRootViewController:thirdViewController];

tabBar.viewControllers = [[NSArray alloc] initWithObjects:firstNavController, secondNavController, thirdNavController, nil];
tabBar.delegate=self;
tabBar.selectedIndex=0;

但是当我尝试在选项卡上单击时弹出到root时，只能访问第3个导航控制器。

所以它只适用于第三个标签，第一个和第二个标签不起作用。

Answer 1

如果您在tabBarController之上加载视图控制器，则可以解除加载的视图控制器。

[self.presentingViewController dismissViewControllerAnimated:self completion:nil];

Answer 2

UINavigationController * navController = (UINavigationController *) [[[tabbarcontroller viewControllers] objectAtIndex: tabbarcontroller.selectedIndex] rootViewController];

Answer 3

如果您希望弹出所有这些视图控制器，您可能会发现此委托很有用。

- (BOOL)tabBarController:(UITabBarController *)tabBarController
shouldSelectViewController:(UIViewController *)viewController {

//iterate though tabbar-viewcontrollers to pop all of them

//return NO, if you want this to be handled like an action
return NO;

//return YES, if you want this to be handled like a normal selection
return YES;
}

希望有所帮助

Answer 4

It will pop to rootViewController when tap on the tab.

-(BOOL)tabBarController:(UITabBarController *)tabBarController shouldSelectViewController:(UIViewController *)viewController{
    [(UINavigationController*)viewController popToRootViewControllerAnimated:YES];
    return YES;
}

如何在自定义标签栏按钮上弹出根视图控制器点击iOS

4 个答案: