以编程方式创建的Swift 3子类化uiviewcontroller

Question

我在菜单中有一个幻灯片，用于以编程方式创建UIViewController：

func showControllerForMenu(_ menus: Menu) {
    let menuChoiceViewController = UIViewController()
    menuChoiceViewController.view.backgroundColor = UIColor.white
    menuChoiceViewController.navigationItem.title = menus.name
    navigationController?.navigationBar.tintColor = UIColor.black
    navigationController?.navigationBar.titleTextAttributes =     [NSForegroundColorAttributeName: UIColor.black]
    navigationController?.pushViewController(menuChoiceViewController, animated: true)
}

这很好用，我想弄清楚的是如何子类化UIViewController以添加控件和功能。任何帮助将不胜感激。