应用程序关闭时（以滑动方式）以Xamarin形式的FCM ios推送通知

Question

我目前正在处理xamarin形式的ios应用程序推送通知。如果应用程序已关闭（滑动），则DidReceiveRemoteNotification不会调用。

数据有效负载类似于下面的服务器端，

私有无效SendMessage（string [] MessageTokenArray，字符串TextMessage）

    {
            var dataIOS = new
                {
                    // to = MessageToken,
                    registration_ids = MessageTokenIOS,
                    content_available = true,
                    priority = "high",
                    data =  new
                    {
                      body = body1,
                      title = eventname,
                      click_action = "OPEN_ACTIVITY_1",
                      priority = "high",
                      tag = "\"1\""
                     },
                     notification = new 
                     {
                        title = eventname,
                        text = TextMessage,
                        sound = 1,
                        vibrate = 1,
                    },
                };
                SendNotificationn(dataIOS);
        }
    }

在xamarin ios中

公共重写布尔FinishedLaunching（UIApplication应用，NSDictionary选项） {

        CrossFirebasePushNotification.Current.RegisterForPushNotifications();
        FirebasePushNotificationManager.Initialize(options, true);
        FirebasePushNotificationManager.CurrentNotificationPresentationOption = UNNotificationPresentationOptions.Alert | UNNotificationPresentationOptions.Badge | UNNotificationPresentationOptions.Sound;

        CrossFirebasePushNotification.Current.OnTokenRefresh += async (s, p) =>
        {
            //save token in server db
        };
        CrossFirebasePushNotification.Current.OnNotificationReceived += async (s, p) =>
        {
            //save data in local db
        };

        CrossFirebasePushNotification.Current.OnNotificationOpened += (s, p) =>
        {
            //do something
        };
        return base.FinishedLaunching(app, options);

    }

公共重写void DidReceiveRemoteNotification（UIApplication应用程序，NSDictionary userInfo，操作完成处理程序）

{   FirebasePushNotificationManager.DidReceiveMessage（userInfo）;

completionHandler（UIBackgroundFetchResult.NewData）;

}