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我有一个（催化剂）应用程序，它可以有几个窗口。我创建了一个按钮，如果用户按下此按钮，应用程序将创建一个新窗口。要知道，需要显示什么View，我有不同的NSUserActivityactivityTypes。在新窗口中应该有一个按钮，可以关闭这个新窗口。问题是，在循环打开的会话时，所有 userActivities 都是nil（我需要正确UISceneSession的UIApplication.shared.requestSceneSessionDestruction.

这是我的代码：

struct ContentView: View {
    var body: some View {
        VStack {
            // Open window type 1
            Button(action: {
                UIApplication.shared.requestSceneSessionActivation(nil,
                                                                   userActivity: NSUserActivity(activityType: "window1"),
                                                                   options: nil,
                                                                   errorHandler: nil)
            }) {
                Text("Open new window - Type 1")
            }

            // Open window type 2
            Button(action: {
                UIApplication.shared.requestSceneSessionActivation(nil,
                                                                   userActivity: NSUserActivity(activityType: "window2"),
                                                                   options: nil,
                                                                   errorHandler: nil)
            }) {
                Text("Open new window - Type 2")
            }
        }
    }
}

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?

    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)

            if connectionOptions.userActivities.first?.activityType == "window1" {
                window.rootViewController = UIHostingController(rootView: Window1())
            } else if connectionOptions.userActivities.first?.activityType == "window2" {
                window.rootViewController = UIHostingController(rootView: Window2())
            } else {
                window.rootViewController = UIHostingController(rootView: ContentView())
            }
            self.window = window
            window.makeKeyAndVisible()
        }
    }
...

struct Window1: View {
    var body: some View {
        VStack {
            Text("Window1")
            Button("show") {
                for session in UIApplication.shared.openSessions {
                    // this prints two times nil !
                    print(session.scene?.userActivity?.activityType)
                }
            }
        }
    }
}
struct Window2: View {
    var body: some View {
        Text("Window2")
    }
}
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1 回答 1

0

我遇到了同样的问题。我最终为每个场景分配了唯一的委托类并进行了检查。

于 2020-05-13T06:07:41.283 回答