iphone - 点击 tabBar 时转到 rootView

Question

我使用了基于 View 的应用程序，因为我以编程方式生成了 TabBar。问题是:

我有一个iPhone应用程序，其中我有2个带有tabbarcontroller的tabiTems。inside tabbarcontroller每个viewController是一个导航 Controller 。选择第二个标签时，我有一个 View Controller 。当我选择另一个 View 的按钮时，我正在按下另一个 View self.navigation controller 的 Controller 。在那个 viewcontroller 中，我正在插入并像那样进行。但问题是当我再次选择 tabitem 时，那里显示了 pushviewcotrooller。但是当我选择选项卡时，我再次需要那个 rootview

我在 AppDelegate.m 中的代码是:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

 UINavigationController *nc1;
    nc1 = [[UINavigationController alloc] init];

UIViewController *viewController1 = [[[ViewController alloc] initWithNibName:@"ViewController" bundle:nil] autorelease];
    nc1.viewControllers = [NSArray arrayWithObjects:viewController1, nil];





    UINavigationController *nc2;
    nc2 = [[UINavigationController alloc] init];

 UIViewController *viewController2 = [[[secondview alloc] initWithNibName:@"secondview" bundle:nil] autorelease];
    nc2.viewControllers = [NSArray arrayWithObjects:viewController2, nil];


    self.tabBarController = [[[UITabBarController alloc] init] autorelease];
   self.tabBarController.viewControllers = [NSArray arrayWithObjects:nc1,nc2,nil];
  self.window.rootViewController=self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}

Answer 1

也许你正在寻找这个:

- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
{       
    int tabitem = tabBarController.selectedIndex;
    [[tabBarController.viewControllers objectAtIndex:tabitem] popToRootViewControllerAnimated:YES];
}