Xcode: Application Windows are Expected to have a Root View Controller at the end of Application Launch

Question

I am new to Xcode and have tried to run a simple app (i can give code if needed) with the emualtor, and an although it says 'Build Successful', a Target Output says "Application Windows are Expected to have a Root View Controller at the end of Application Launch"

Is there a fix you could tell me please? Again this is the first time I've used Xcode so sorry if it's a simple mistake :)

Thanks a lot x

Answer 1

In you Application Delegate class in the - (void)applicationDidFinishLaunching:(UIApplication *)application method you need to set a root view controller to your window like this :

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

    UIViewController *viewController = [[UIViewController alloc] init];
    [self.window setRootViewController:viewController];

    [self.window makeKeyAndVisible];
    return YES;
}

The message should disappear after that.