• Create a new single view app project in Xcode.
• Select Swift as the language and deselect the option to use Storyboard as the interface.

• Delete the Main.storyboard file.
• Remove the Main value config entries in Build Settings.
• Remove the key UIMainStoryboardFile or Storyboard Nameand value Main in the Info.plist.

• Create a new file called HelloWorldViewController.swift

Replace the content of the function scene(_:willConnectTo:options:) with:

guard let windowScene = (scene as? UIWindowScene) else { return }
window = UIWindow(frame: windowScene.coordinateSpace.bounds)
window?.windowScene = windowScene
window?.rootViewController = HelloWorldViewController()
window?.makeKeyAndVisible()