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Applications are expected to have a root view controller at the end of application launch

Asked 2011-09-22T20:21:51.390
391

I get the following error in my console:

Applications are expected to have a root view controller at the end of application launch

Below is my application:didFinishLaunchWithOptions method:

- (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;
}

In Interface Builder, the UITabBarController's delegate is hooked up to the App Delegate.

Anyone know how to fix this issue?

ios objective-c
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2 Answers

443

Replace in AppDelegate

 [window addSubview:[someController view]];

to

  [self.window setRootViewController:someController];
answered 2012-09-13T02:51:03.127
0

I was migrating an old EAGLView sample project to the new GLKView sample project in Xcode 4 and none of the solutions worked for me. Finally I realized that I was trying to set the main GLKViewController's self.view to point to a nested GLKView in Interface Builder.

When I pointed the self.view back to the root GLKView in Interface Builder, my app was then able to launch without an error message (so make sure your view controller's view is set to the root view).

P.S. if you want to get a nested GLKView working, create a new member variable like self.glkSubview in ViewController.h and drag its connection to the nested GLKView in Interface Builder. Then make sure to drag self.glkSubview's delegate to File's Owner. You must manually call [self.glkSubview display] in "- (void)glkView:(GLKView *)view drawInRect:(CGRect)rect" if you have setNeedsDisplay turned off for the GLKView.

answered 2013-05-01T19:31:46.773

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