Swift->标签控制器

// 标签栏控制器
var tabCtl : UITabBarController = UITabBarController.init()

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    
    let stuVC:FirstViewController = FirstViewController()
    stuVC.navigationItem.title = "**"
    stuVC.view.backgroundColor  = UIColor.white
    let stuNav:UINavigationController = UINavigationController.init(rootViewController: stuVC)
    
    
    let tongVC = SecondViewController()
    tongVC.navigationItem.title = "**"
    tongVC.view.backgroundColor  = UIColor.white
    
    let tongNav = UINavigationController(rootViewController: tongVC)
    
    let findVC = ThirdViewController()
    findVC.navigationItem.title = "**"
    findVC.view.backgroundColor  = UIColor.white
    
    let findNav = UINavigationController(rootViewController: findVC)
    
    let myVC = MyViewController()
    myVC.navigationItem.title = "**"
    myVC.view.backgroundColor  = UIColor.white
    
    let myNav = UINavigationController(rootViewController: myVC)
    
    // 给导航添加标签栏标签
    
    stuNav.tabBarItem = UITabBarItem.init(title: "**", image: UIImage.init(named: "123"), tag: 100)
    
    lifeNav.tabBarItem = UITabBarItem.init(title: "**", image: UIImage.init(named: "123"), tag: 101)
    fineNav.tabBarItem = UITabBarItem.init(title: "**", image: UIImage.init(named: "123"), tag: 102)
    meNav.tabBarItem = UITabBarItem.init(title: "**", image: UIImage.init(named: "123"), tag: 103)
    
    
    self.tabCtl.viewControllers  = [stuNav,tongNav,findNav,myNav]
    
    self.window?.rootViewController = self.tabCtl


    return true
}