Xcode 新建工程去除 Main.Storyboard

一共三步：

1. 找到 info.plist -> 删除 Main storyboard file base name 键和值
2. 删除 Main.Storyboard
3. 在 AppDelegate.swift 加上

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

      self.window = UIWindow(frame: UIScreen.main.bounds)
      self.window?.backgroundColor = UIColor.white
      self.window?.rootViewController = XXXViewController()
      self.window?.makeKeyAndVisible()

      return true
  }