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

Question

I am using the facebook iOS SDK setup tutorial: https://developers.facebook.com/docs/mobile/ios/build/

After Step 4: Adding Log Out to your App,

I get a bla

Answer 1

Check that you have the following line in your application delegate's application:didFinishLaunchingWithOptions: method:

self.window.rootViewController = self.viewController;