application:continueUserActivity:restorationHandler:在使用切换时没有被调用

时间:2019-08-26 20:23:21

标签: swift swiftui handoff nsuseractivity

我正在测试设备上使用最新版本的Xcode,macOS,iOS(不使用模拟器)和SwiftUI

使用SwiftUI和UserActivity DelegateHandler的用户界面:

struct UserActivityDelegateObserver: UIViewRepresentable {
    @Binding var textData: String

    func makeUIView(context: Context) -> UIView { return UIView() }

    func updateUIView(_ uiView: UIView, context: Context) {
        context.coordinator.userActivity?.needsSave = true
    }

    func makeCoordinator() -> Coordinator {
        Coordinator(textData: _textData)
    }

    class Coordinator: UIResponder, NSUserActivityDelegate {
        @Binding var textData: String

        init(textData: Binding<String>) {
            self._textData = textData
            super.init()

            self.userActivity = NSUserActivity(activityType: "com.domain.appname.activity")
            self.userActivity!.title = "My Activity"
            self.userActivity!.userInfo = ["Key": textData.wrappedValue]
            self.userActivity!.isEligibleForHandoff = true
            self.userActivity!.becomeCurrent()
        }

        override func updateUserActivityState(_ activity: NSUserActivity) {
            activity.addUserInfoEntries(from: ["Key": textData])
            super.updateUserActivityState(activity)
        }
    }
}

struct ContentView: View {
    @State var textData: String = "Placeholder"

    var body: some View {
        NavigationView {
            ZStack {
                UserActivityDelegateObserver(textData: $textData)
                Form {
                    Section {
                        TextField("Placeholder", text: $textData)
                    }
                }
            }
            .navigationBarTitle("Title", displayMode: .inline)
        }
    }
}

在我的appdelegate内:

func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {
    print("this is not getting called")
    return true
}

当我在一台设备上启动该应用程序并使用另一台设备进入该菜单时(双击主屏幕按钮),然后单击屏幕底部的测试应用程序的切换符号,该应用程序将启动,但函数application:continueUserActivity:restorationHandler:永远不会被调用,因此我无法继续执行它,而是仅通过单击它来显示启动应用程序时的标准行为。任何想法为何?

1 个答案:

答案 0 :(得分:1)

this post可能是一个错误,报告了相同的问题,但仍然没有答案,所以我认为这可能是Xcode beta版的错误。