iOS 12 / 13 程序化视图创建

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，我已经删除了我的Main.storyboard ，从我的Info.plist删除了引用并设置我的UIWindow和rootViewController如下：

    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
    }

但是，当尝试在 iOS 13 中运行我的应用程序时，我遇到了崩溃 -

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Could not find a storyboard named 'Main' in bundle NSBundle </Users/Dev/Library/Developer/CoreSimulator/Devices/8A4474B1-FCA3-4720-8F34-A6975A03EE19/data/Containers/Bundle/Application/258FA246-A283-4FE6-A075-58BD32424427/Home.app> (loaded)'
***

iOS 12 仍按预期运行。 我应该如何以编程方式设置我的视图以支持 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