IOS - AppDelegate

AppDelegate.swift是管理App的整个生命周期

//当应用程序载入后执行此方法
func application(_ application: UIApplication,
                didFinishLaunchingWithOptions launchOptions:
                    [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    self.window = UIWindow.init(frame: UIScreen.main.bounds)
    self.window?.backgroundColor = UIColor.white
    let navtion = UINavigationController.init(rootViewController: ContentViewController()) //指定app启动之后运行的页面文件
    self.window?.rootViewController = navtion
    self.window?.makeKeyAndVisible()
    return true
}

func applicationWillResignActive(_ application: UIApplication) {
    //应用程序进入非活跃状态时执行
}

func applicationDidEnterBackground(_ application: UIApplication) {
    //应用程序进入后台时执行
}

func applicationWillEnterForeground(_ application: UIApplication) {
    //应用程序从后台重新推入前台时执行
}

func applicationDidBecomeActive(_ application: UIApplication) {
    //应用程序进入活跃状态时执行
}

func applicationWillTerminate(_ application: UIApplication) {
    //应用程序退出时执行
}