xcode 11. ios13 미만, storyboard 없이 시작

삭제

프로젝트 General > Deployment Info Main interface 제거
SceneDelegate 제거

Info.plist

Info.plist 의 Main nib file base name 항목 제거 되었는지 확인
Application Scene Manifeset 제거

AppDelegate

class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        
        window = UIWindow(frame: UIScreen.main.bounds)
        
        window?.backgroundColor = UIColor.white
        window?.rootViewController = ViewController()
        
        // xib 
        // window?.rootViewController = ViewController(nibName:"Root", bundle:nil)
        
        window?.makeKeyAndVisible()
        return true
    }
}