显示UITabBar而不显示RootViewController

Question

我有一个LoginViewController，也就是RootViewController。这个ViewController不应该包含TabBar。ViewController的其余部分应该包含UITabBar，但它没有显示。如果我将tabBar设置为rootController，它将在视图控制器中显示tabBar。这也会使第一个选项卡成为它不应该使用的rootviewcontroller。

那么，我的问题是，如何在没有rootViewController的情况下使loginview成为tabBar，并且仍然在其他视图控制器中显示tabBar？

我的代码：

tabBarController = [[UITabBarController alloc] init];

MenuViewController *firstTab = [[MenuViewController alloc] initWithNibName:@"MenuViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:firstTab];


FixtureViewController *secondTab = [[FixtureViewController alloc] initWithNibName:@"FixtureViewController" bundle:nil];
UINavigationController *navController2 = [[UINavigationController alloc] initWithRootViewController:secondTab];

WorldCupViewController *thirdTab = [[WorldCupViewController alloc] initWithNibName:@"WorldCupViewController" bundle:nil];
UINavigationController *navController3 = [[UINavigationController alloc] initWithRootViewController:thirdTab];

LoginViewController *loginView = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil];
UINavigationController *navController4 = [[UINavigationController alloc] initWithRootViewController:loginView];



self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = @[navController, navController2, navController3];

navController.tabBarItem.image = [UIImage imageNamed:@"message-7"];
navController2.tabBarItem.image = [UIImage imageNamed:@"football-32"];
    navController3.tabBarItem.image = [UIImage imageNamed:@"trophy-32"];
[[UITabBar appearance] setTintColor:[UIColor colorWithRed:110/255.0f green:89/255.0f blue:196/255.0f alpha:1.0f]];

[self.window setRootViewController:navController4];
[self.window makeKeyAndVisible];

Answer 1

您需要做的是将应用程序从LoginViewController转换到Tabbar。我建议做的是将LoginViewController替换为TabBar作为rootViewController。

下面是一些示例代码，在您的AppDelegate中执行此操作

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

     LoginViewController *loginView = [[LoginViewController alloc] initWithNibName:@"LoginViewController" bundle:nil];
     UINavigationController *navController4 = [[UINavigationController alloc] initWithRootViewController:loginView];

     [self.window setRootViewController:navController4];
     [self.window makeKeyAndVisible];

     return YES;
}

-(void)transitionToTabBar
{

   // Set the TabBar how you are in your sample code, this is just an example.
   [self.window setRootViewController:[[UITabBarController alloc] initWithNibName:@"SomeNib" bundle:Nil]];

   [UIView transitionWithView:self.window duration:0.5f options:UIViewAnimationOptionTransitionCurlDown animations:^{
      [self.window makeKeyAndVisible];
   } completion:nil];
}

Answer 2

您应该使用主视图控制器(对于MenuViewController)，通过使用segue，您可以显示另一个视图控制器，其中包含TabBar。