title: black screen when I run my iOS application
body: <p>I'm trying to do a new iOS app in Xcode. I made a main storyboard and I added a label on my ViewController. When I run my application, first second it show the label and then become the screen black without any errors.</p>
  
  <p>I'm working on Xcode 11 (Swift 5) and this message appears on output:</p>
  
  <blockquote>
    <p>[SceneConfiguration] Info.plist configuration "Default Configuration" for UIWindowSceneSessionRoleApplication contained UISceneDelegateClassName key, but could not load class with name "gina.SceneDelegate"</p>
  </blockquote>
  
  <p>I don't know where my mistake is.</p>
  
  <p><img src="https://i.stack.imgur.com/sCAvC.jpg" alt="black screen when running"></p>