Question

我的应用程序不使用情节提要。所有视图都是以编程方式创建的。

从历史上看，我删除了title，从Main.storyboard中删除了引用，并按如下所示设置了Info.plist和UIWindow：

rootViewController

但是，当尝试在iOS 13中运行我的应用程序时，出现崩溃-

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

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

        self.window = window

        return true
    }

iOS 12仍按预期运行。如何以编程方式设置视图以支持iOS 12和13？

Answer 1

您还需要添加更新SceneDelegate.swift。

更新func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions)并添加

        guard let windowScene = (scene as? UIWindowScene) else { return }
        let window = UIWindow(windowScene: windowScene)

        let viewController = ViewController()
        window.rootViewController = viewController
        window.makeKeyAndVisible()

        self.window = window

iOS 12/13程序化视图创建

1 个答案: