Set initial view controller in code using SceneDelegate

gistfile1.txt

// First, delete the two storyboard entries in the Info.plist (one newer one for SceneDelegate and a newer one for AppDelegate)
  
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    guard let windowScene = scene as? UIWindowScene else {
      return
    }
    
    let blueViewController = UIViewController()
    blueViewController.view.backgroundColor = .blue
    
    let window = UIWindow(windowScene: windowScene)
    window.rootViewController = blueViewController
    self.window = window
    window.makeKeyAndVisible()
  }