title: Failed to instantiate the default view controller for UIMainStoryboardFile
body: <p>I am writing a small sample app with Xamarin and MvvmCross 6.4.2. I completed the Xamarin.Android version and am now starting the Xamarin.iOS version. I created a view controller for the first screen:</p>
  <pre><code>public class SignInViewController : MvxViewController&lt;SignInViewModel&gt;
  {
      public SignInViewController() : base(nameof(SignInViewController), null)
      {
          
      }
  
      public override void ViewDidLoad()
      {
          // never gets called...
  
          base.ViewDidLoad();
      }
  }
  </code></pre>
  <p>When I run the app, I just get a blank screen and <code>ViewDidLoad</code> never gets called. In the application output it says:</p>
  <blockquote>
  <p>Failed to instantiate the default view controller for
  UIMainStoryboardFile 'Main' - perhaps the designated entry point is
  not set?</p>
  </blockquote>
  <p>My <code>Main.storyboard</code> is blank and I tried to modify it in Xcode Interface Builder to set my <code>SignInViewController</code> as the entry point, but I couldn't figure out how.</p>