11.swift5-删除main.storyboard,并设置代码启动

要删除info.plist的两个地方

代码也需要修改,appDelgate:

       func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

        let window = UIWindow(frame: UIScreen.main.bounds)

        let viewController = ViewController()

        window.rootViewController = viewController

        window.makeKeyAndVisible()

        self.window = window

        return true

    }

sceneDelegate:

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

        if let windowScene = scene as? UIWindowScene {

            let window = UIWindow(windowScene: windowScene)

            let viewController = ViewController()

            window.rootViewController = viewController

            self.window = window

            window.makeKeyAndVisible()

        }

    }

以上启动代码为单个view的，以后有空再加导航栏的写法进来。