应用程序在启动结束时应该有一个根视图控制器

我在控制台得到以下错误:

下面是我的应用程序:didFinishLaunchWithOptions方法:

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

    // Set Background Color/Pattern
    self.window.backgroundColor = [UIColor blackColor];
    self.tabBarController.tabBar.backgroundColor = [UIColor clearColor];
    //self.window.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"testbg.png"]];

    // Set StatusBar Color
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent];

    // Add the tab bar controller's current view as a subview of the window
    self.window.rootViewController = self.tabBarController;
    [self.window makeKeyAndVisible];
    return YES;
}

在Interface Builder中，UITabBarController的委托被连接到App委托。

有人知道怎么解决这个问题吗?

当前回答

我也有这个问题。我让我的项目在xcode4.2.1中运行。我已经看了上面所有的评论，但没有人对我来说很酷。过了一会儿，我发现我注释了一段代码。

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

然后我取消了评论。我一切都好。希望这对你们有帮助。

2011-12-13 13:43:20

其他回答

这发生在我身上。通过编辑.plist文件解决。指定Main nib文件基名。(应该是MainWindow.xib)。希望这能有所帮助。

2011-11-07 08:01:35

移动setRootViewController:从didFinishLaunchingWithOptions:到awakeFromNib:解决了这个问题在我的空项目。

2014-11-18 05:34:36

OrdoDei给出了一个正确而有价值的答案。我添加这个答案只是为了给出一个didFinishLaunchingWithOptions方法的例子，该方法使用了他的答案以及其他关于导航控制器的评论。

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

    // Override point for customization after application launch.

    // Instantiate the main menu view controller (UITableView with menu items).
    // Pass that view controller to the nav controller as the root of the nav stack.
    // This nav stack drives our *entire* app.
    UIViewController *viewController = [[XMMainMenuTableViewController alloc] init];
    self.navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];

    // Instantiate the app's window. Then get the nav controller's view into that window, and onto the screen.
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // [self.window addSubview:self.navigationController.view];
    // The disabled line above was replaced by line below. Fixed Apple's complaint in log: Application windows are expected to have a root view controller at the end of application launch
    [self.window setRootViewController:self.navigationController];
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

2013-08-15 11:33:07

以上这些方法对我都没用……发现我的appDelegate上的init方法有问题。如果您正在实现init方法，请确保正确执行

我有这个:

- (id)init {
    if (!self) {
        self = [super init];
        sharedInstance = self;
    }
    return sharedInstance;
}

然后改成了这样:

- (id)init {
    if (!self) {
        self = [super init];
    }
    sharedInstance = self;
    return sharedInstance;
}

哪里“sharedInstance”是一个指针到我的appDelegate单例

2013-09-11 18:20:00

在AppDelegate中替换

 [window addSubview:[someController view]];

  [self.window setRootViewController:someController];

2012-09-13 02:51:03

应用程序在启动结束时应该有一个根视图控制器

推荐文章

最新文章

标签