iOS 7 - Failing to instantiate default view controller

So this also happened to me too. I checked 50 times and my "Is Initial View Controller" was checked, believe me. It happened out of the blue. So how did I fix it?

Create a new Storyboard in your project, name it something like Main_iPhoneV2 (or iPadV2 depending on your original storyboard style)

Open the broken storyboard, click anywhere in the white area and press command-a, then command-c (select all and copy)

Open your new storyboard and press command-v to paste the same exact setup

Go to your project settings, change your "Main Interface" to the new Main_iPhoneV2 (If it's your iPad and you're writing a universal app, you'll have to edit the -Info.plist and look for the value "Main storyboard file base name (iPad)

Recompile, and stop pulling your hair out

首先单击右侧Utilities栏中的View Controller .接下来选择Attributes Inspector并确保在View Controller部分下选中'Is Initial View Controller'复选框!

在Attributes Inspector中检查是否为初始视图控制器.

当我改变了故事板文件名为"我得到这个错误Main.storyboard " TO:" XXX.storyboard "

我的解决方案是:

产品展示 - >清洁

更改:支持文件 - > info.plist - > 主故事板文件基本名称 - > 主要 TO:XXX

祝好运

如果您有一些代码,也会报告此警告:

    window = UIWindow(frame: UIScreen.mainScreen().bounds)
    window?.rootViewController = myAwesomeRootViewController
    window?.makeKeyAndVisible()

在这种情况下,请转到目标设置的第一页并设置Main Interface为空,因为您不需要应用的故事板条目.

使用Interface Builder:

检查是否设置了" 是否为初始视图控制器 ".您可以使用以下步骤进行设置:

选择您的视图控制器(将显示为初始屏幕).

从Utilities窗口中选择Attribute inspector.

从View Controller部分选择' Is Initial View Controller ' (如果没有).

如果您已完成此步骤并仍然收到错误 uncheck and do it again.

以编程方式使用:

Objective-C:

        self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

        UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"HomeViewController"]; // <storyboard id>

        self.window.rootViewController = viewController;
        [self.window makeKeyAndVisible];

        return YES;

斯威夫特:

        self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
        let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)

        var objMainViewController: MainViewController = mainStoryboard.instantiateViewControllerWithIdentifier("MainController") as! MainViewController

        self.window?.rootViewController = objMainViewController

        self.window?.makeKeyAndVisible()

        return true

Setup the window manually,

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    if (!application.keyWindow.rootViewController) 
     {
        UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

        UIViewController *myViewController= [storyboard instantiateViewControllerWithIdentifier:@"myViewController identifier"];

         application.keyWindow.rootViewController = myViewController;
     }
}

我已经体验过这一点,我的标签栏控制器没有出现在模拟器中,还有黑屏.为了让我的应用程序出现在模拟器中,我执行了以下操作.

转到Main.storyboard.

检查" Is Initial View Controller属性"检查器选项卡下的.