收到一个信号推送通知后，如何以棱镜形式浏览页面？

Question

我有一个应用程序，它允许通过xamarin sdk使用一个信号进行推送通知和即时通讯。

我的应用使用的是Arizona.forms 7.2和xamarin.forms 4.3.x

当我打开通知并开发了一些代码时，我想导航，但是导航存在问题。它没有按预期工作。尤其是应用无法在后台运行。

我可以获得推送通知，但是当我打开通知时没有导航，我想转到主页而不是产品详细信息页面。

不导航到我想要的页面。

这是我的app.cs代码

  protected override async void OnInitialized()
        {
            InitializeComponent();

            XF.Material.Forms.Material.Init(this);

            if (Helpers.AppConstants.DebugMode)
            {
                // Handle Xamarin Form Logging events such as Binding Errors
                Log.Listeners.Add(new Services.TraceLogListener());
            }

            InitAkavache();

            InitGoogleAnalytics();

            OneSignal.Current.StartInit(Helpers.AppConstants.OneSignalKey)
               .Settings(new Dictionary<string, bool>()
               {
                    {IOSSettings.kOSSettingsKeyAutoPrompt, false },
                    {IOSSettings.kOSSettingsKeyInAppLaunchURL, true },
               })
               .InFocusDisplaying(OSInFocusDisplayOption.Notification)
               .UnsubscribeWhenNotificationsAreDisabled(true)
               .HandleNotificationReceived((result) => HandleNotificationReceived(result))
               .HandleNotificationOpened((result) => HandleNotificationOpened(result))
               .EndInit();

            if (!IsNotification)
            {
                await NavigationService.NavigateAsync(Screens.SplashScreenPage);
            }
            else
            {
                IsNotification = false;
            }
        }

   private void HandleNotificationOpened(OSNotificationOpenedResult result)
        {
            IsNotification = true;
            OSNotificationPayload payload = result.notification.payload;
            Dictionary<string, object> additionalData = payload.additionalData;

            if (additionalData.ContainsKey("type") && additionalData.ContainsKey("product"))
            {
                var productId = Convert.ToString(additionalData["product"]);
                var id = Convert.ToInt64(productId);

                NavigationService.NavigateAsync($"myapp:///{Screens.NavigationPage}/{Screens.MainTabbedPage}?{Prism.Navigation.KnownNavigationParameters.SelectedTab}={Screens.MainPage}", ("productId", id)).GetAwaiter().GetResult();
                return;
            }
            else if (additionalData.ContainsKey("type") && additionalData.ContainsKey("category"))
            {
                var categoryId = Convert.ToString(additionalData["category"]);
                var id = Convert.ToInt32(categoryId);
                NavigationService.NavigateAsync($"myapp:///{Screens.NavigationPage}/{Screens.MainTabbedPage}?{Prism.Navigation.KnownNavigationParameters.SelectedTab}={Screens.MainPage}", ("categoryId", id)).GetAwaiter().GetResult();
                return;
            }
            else if (additionalData.ContainsKey("type") && Convert.ToString(additionalData["type"]) == "open")
            {
                NavigationService.NavigateAsync($"myapp:///{Screens.NavigationPage}/{Screens.MainTabbedPage}?{KnownNavigationParameters.SelectedTab}={Screens.MainPage}").GetAwaiter().GetResult();

                return;
            }
            else if (additionalData.ContainsKey("type") && additionalData.ContainsKey("coupon"))
            {
                IsNotification = false;

                var coupon = Convert.ToString(additionalData["coupon"]);

                if (!string.IsNullOrWhiteSpace(coupon))
                {
                    Xamarin.Essentials.Clipboard.SetTextAsync(coupon).GetAwaiter().GetResult();
                }

                return;
            }
        }

        private void HandleNotificationReceived(OSNotification notification)
        {
            OSNotificationPayload payload = notification.payload;
            string message = payload.body;
            Dictionary<string, object> additionalData = payload.additionalData;

            if (additionalData != null && additionalData.ContainsKey("type"))
            {
                var item = new Data.Entity.Notification
                {
                    Title = notification.payload.title,
                    SubTitle = notification.payload.subtitle,
                    Body = notification.payload.body,
                    AdditionalData = additionalData.Select(s => new Data.Entity.AdditionalData
                    {
                        Type = s.Key,
                        Value = Convert.ToString(s.Value)
                    }).ToList()
                };

                if (additionalData.ContainsKey("product"))
                {
                    item.Type = Enums.NotificationType.Product;
                }
                else if (additionalData.ContainsKey("category"))
                {
                    item.Type = Enums.NotificationType.Category;
                }
                else if (Convert.ToString(additionalData["type"]) == "open")
                {
                    item.Type = Enums.NotificationType.Open;
                }
                else if (additionalData.ContainsKey("coupon"))
                {
                    item.Type = Enums.NotificationType.Coupon;
                }
                else
                {
                    item.Type = Enums.NotificationType.Unknown;
                }

                using (var notificationService = new NotificationLiteDbService())
                {
                    notificationService.CreateItem(item);
                }


            }
        }

编辑1：

如果应用程序在前台或后台运行，我可以获取通知和导航。 但是，如果应用程序关闭，我会收到通知，但无法导航。