objective-c - Tabbar is not showing OR screen does not reconize touches

Question

i'm using this code for a tabbar, but the tabbar is not showing

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


    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    UITabBarController *tabController = [[UITabBarController alloc] init];

    UIViewController *viewController1 = [[UIViewController alloc] init];

    UIViewController *viewController2 = [[UIViewController alloc] init];

    UIViewController *viewController3 = [[UIViewController alloc] init];

    UIViewController *viewController4 = [[UIViewController alloc] init];

    tabController.viewControllers = [NSArray arrayWithObjects:viewController1,
                                     viewController2,
                                     viewController3,
                                     viewController4, nil];

    self.window.rootViewController = tabController;



    UIViewController *rootController = 
    [[xTableViewController alloc] 
     initWithNibName:@"xTableViewController" bundle:nil];

    navigationController = [[UINavigationController alloc]
                            initWithRootViewController:rootController];


    self.window = [[UIWindow alloc] 
                   initWithFrame:[[UIScreen mainScreen] bounds]];
    [self.window addSubview:navigationController.view];


    [self.window makeKeyAndVisible];
    return YES;
}

When i remove this line:

self.window = [[UIWindow alloc] 
                       initWithFrame:[[UIScreen mainScreen] bounds]];

The tabbar show's up but i cant 'touch' my screen (i cant touch my screen but the tabbar is 'touchable' because nothing is working, does anyone know how to display the tabbar on a normal way?

Answer 1

好像您正在初始化窗口两次。首先使用 UITabbarContorller，然后使用 UINavigationController。尝试

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    UITabBarController *tabController = [[UITabBarController alloc] init];
    UIViewController *viewController1 = [[UIViewController alloc] init];
    UIViewController *viewController2 = [[UIViewController alloc] init];
    UIViewController *viewController3 = [[UIViewController alloc] init];
    UIViewController *viewController4 = [[UIViewController alloc] init];
    tabController.viewControllers = [NSArray arrayWithObjects:viewController1,
                                 viewController2,
                                 viewController3,
                                 viewController4, nil];

    self.window.rootViewController = tabController;
    [self.window makeKeyAndVisible];
    return YES;
}