//首先把 菜单 和 分页视图控制器 添加到视图上
    let menu = KMPageMenu(frame: CGRect(x: 0, y: 40, width: width, height: 44), titles: titles)
    m.style.titleFont = UIFont.systemFont(ofSize: 14)
    view.addSubview(menu)

    let page = KMPagingViewController(viewControllers: viewControllers)

    page.view.frame = CGRect(x: 0, y: menu.frame.maxY, width: width, height: view.frame.height - menu.frame.maxY)
    self.addChildViewController(page)
    page.didMove(toParentViewController: self)
    self.view.addSubview(page.view)

    // 菜单下标改变的回调
    menu.valueChange = { [weak self] index in
        self?.page.pagingToViewController(at: index)
    }
    
    // KMPageMenu 控件继承于 UIControl 所以也可以用监听 valueChanged 的方式
    menu.addTarget(self, action: #selector(menuValueChange(sender:)), for: .valueChanged)
    
    // 分页控制器切换完成的回调
    page.didFinishPagingCallBack = { [weak self] (currentViewController, currentIndex)in
        self?.menu.setSelectIndex(index: currentIndex, animated: true)
    }
    
    // KMPagingViewController 同时也提供了代理的回调
    // KMPagingViewControllerDelegate
    
    page.delegate = self
    
    func pagingController(_ pagingController: KMPagingViewController, didFinish currentViewController: UIViewController, currentIndex: Int) {
    
        print("selectIndex == \(currentIndex)")
        
    }