iOS SceneDelegate Programmatic UI Setup

programmatic-ui.swift

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
  guard let scene = (scene as? UIWindowScene) else { return }

  let vc = ViewController()
  let nc = UINavigationController(rootViewController: vc)

  window = UIWindow(frame: scene.coordinateSpace.bounds)
  window?.windowScene = scene
  window?.rootViewController = nc
  window?.makeKeyAndVisible()
}