AppDelegate.Swift

import UIKit

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

    varwindow:UIWindow?

    funcapplication(_application:UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey:Any]?) ->Bool{

        // Override point for customization after application launch.

        //实例化控制器

        letmovieVC =MovieViewController()

        //给控制器添加导航标题

        movieVC.navigationItem.title="影讯资讯"

        //实例化导航

        letmovieNav =UINavigationController.init(rootViewController: movieVC)

        //登录注册模块

        letloginVC =LoginViewController()

        loginVC.navigationItem.title="登录"

        letloginNav =UINavigationController.init(rootViewController: loginVC)

        //新闻模块

        letnewsVC =NewsViewController()

        newsVC.navigationItem.title = "新闻"

        letnewsNav =UINavigationController(rootViewController: newsVC)

        //标签栏控制器

        lettabCtl =UITabBarController()

        tabCtl.viewControllers= [movieNav,loginNav,newsNav]

        //设置标签栏标签

        movieNav.tabBarItem=UITabBarItem(tabBarSystemItem:UITabBarSystemItem.contacts, tag:100)

        loginNav.tabBarItem=UITabBarItem(title:"登录", image:nil, tag:101)

        newsNav.tabBarItem=UITabBarItem(tabBarSystemItem: .favorites, tag:102)

        //设置窗口的根视图控制器

        self.window?.rootViewController= tabCtl

        return true

    }