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Question

我已经使用Firebase Cloud Messaging在我的xamarin表单项目（聊天应用程序）上实现了推送通知。通知正在所有状态下接收，点击通知时，我需要显示相应的消息列表页面。

当应用程序处于前台和后台模式时，通知窃听将起作用。但是当应用程序不在后台（处于非活动状态）时，则无法进行点击操作。。当应用程序处于后台状态时，使用DidReceiveRemoteNotification我正在处理通知提示。我使用WillPresentNotification和DidReceiveNotificationResponse来显示通知并在前台模式下处理通知水龙头。下面添加的代码：

 //Notification tapping when the app is in background mode.
 public override void DidReceiveRemoteNotification(UIApplication application, NSDictionary userInfo, Action<UIBackgroundFetchResult> completionHandler)
        {
            HandleMessage(userInfo);

            // Print full message.
            LogInformation(nameof(DidReceiveRemoteNotification), userInfo);

            completionHandler(UIBackgroundFetchResult.NewData);

            var myData = JsonConvert.DeserializeObject<List<webContentList>>(userInfo[new NSString("webContentList")] as NSString);
            Console.WriteLine($"myData received: {myData}");
            if (UIApplication.SharedApplication.ApplicationState.Equals(UIApplicationState.Active))
            {
                //App is in foreground, no action
            }
            else
            {
                MessagingCenter.Send<object, List<webContentList>>(this, "messagedata", myData);
            }
        }

        //Showing the notification when the app is in the foreground mode.
       [Export("userNotificationCenter:willPresentNotification:withCompletionHandler:")]
        public void WillPresentNotification(UNUserNotificationCenter center, UNNotification notification,
Action<UNNotificationPresentationOptions> completionHandler)
        {
            completionHandler(UNNotificationPresentationOptions.Sound | UNNotificationPresentationOptions.Alert);
        }

        //Notification tapping when the app is in the foreground mode.
[Export("userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:")]
            public void DidReceiveNotificationResponse(UNUserNotificationCenter center, UNNotificationResponse response, Action
            completionHandler)
            {
                completionHandler();
                NSDictionary userInfo = response.Notification.Request.Content.UserInfo;
                var myData = JsonConvert.DeserializeObject<List<webContentList>>(userInfo[new NSString("webContentList")] as NSString);
                Console.WriteLine($"myData received: {myData}");
                MessagingCenter.Send<object, List<webContentList>>(this, "messagedata", myData);
            }

完成启动

public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            LoadApplication(new App());

            #region Push Notification            
            Firebase.Core.App.Configure();

            // Register your app for remote notifications.
            if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
            {
                // iOS 10 or later
                var authOptions = UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge | UNAuthorizationOptions.Sound;
                UNUserNotificationCenter.Current.RequestAuthorization(authOptions, (granted, error) => {
                    Console.WriteLine(granted);
                });

                // For iOS 10 display notification (sent via APNS)
                UNUserNotificationCenter.Current.Delegate = this;

                // For iOS 10 data message (sent via FCM)
                //Messaging.SharedInstance.RemoteMessageDelegate = this;
            }
            else
            {
                // iOS 9 or before
                var allNotificationTypes = UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound;
                var settings = UIUserNotificationSettings.GetSettingsForTypes(allNotificationTypes, null);
                UIApplication.SharedApplication.RegisterUserNotificationSettings(settings);
            }

            UIApplication.SharedApplication.RegisterForRemoteNotifications();

            Messaging.SharedInstance.Delegate = this;
            Messaging.SharedInstance.ShouldEstablishDirectChannel = true;
            #endregion

            return base.FinishedLaunching(app, options);
        }

我的通知正文： webContentList是我的模型数据。

{
 "to" : "dmtfiSvBBM0:APA91bFnHkamMSYgxPuiSfdvKnU8hD_mOqrWijnENNgXVSkSgo1ILH3-uKVCU7Ez2PXXOhtDoobIyKBf5UshVfTmvjSqHgXMRTsqguKCSTjIfGnXrVP-_cNFq2sisshZO-BcfkwKTl-I",
 "collapse_key" : "type_a",
 "notification" : {
      "body" : "This is body",
     "title": "Tech Team",
     "priority":"high",
     "content_available":true
 },
 "data" : {
    "webContentList": [
        {
            "webContentDefinitionId": 818084,
            "pageTitle": "CCD Grade 3-4",
            "pageKwd": "CCD Grade 3-4",
            "pageDesc": "CCD Grade 3-4",
            "siteId": 45,
            "pageCreatedTime": 1555145959428,
            "pageUpdatedDate": 1555927274279,
            "modifier": {
                "userId": 12944,
                "applicationId": 32,
                "username": "robert.downey",
                "email": "robert@master-mail.net",
                "firstName": "Robert",
                "lastName": "Downey"
            },
            "creator": {
                "userId": 12944,
                "applicationId": 32,
                "username": "robert.downey",
                "email": "robert@master-mail.net",
                "firstName": "Robert",
                "lastName": "Downey"
            }
        }
        ]
 },
  "ttl": 3600
}

问题

当应用程序处于终止状态时，只会加载主页，而不显示消息列表页面。但是在UI中显示主页之前，UI中还显示了消息列表show progress（acr userdialogs）。因此，我认为LoadApplication(new App());中的FinishedLaunching在应用程序处于终止状态时，在通知点击功能之后可以正常工作。那么，当应用程序处于终止状态时，如何停止执行正常的应用程序启动代码并显示消息列表页面？

更新

尝试如下。初始启动很好，但是通过通知水龙头启动时崩溃。

  LoadApplication(new App());

        if (options != null)
        {
            var myData = JsonConvert.DeserializeObject<List<webContentList>>(options[new NSString("webContentList")] as NSString);
            if(myData != null)
            {
                MessagingCenter.Send<object, List<webContentList>>(this, "messagedata", myData);
            }
        }

Answer 1

您可以通过扩展App构造函数将数据传递给Forms Project。

iOS中的AppDelegate

public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    {

        var myData = JsonConvert.DeserializeObject<List<webContentList>>(options[new NSString("webContentList")] as NSString);

        global::Xamarin.Forms.Forms.Init();
        LoadApplication(new App(myData));

        return base.FinishedLaunching(app, options);
    }

应用程序形式

public App(List<webContentList> list)
    {
        InitializeComponent();

        // handle the logic 
    }

更新

LoadApplication(new App());
MessagingCenter.Send<object, List<webContentList>>(this, "messagedata", myData);

Xamarin IOS：当应用不在后台时如何处理通知点击？（已杀死）

1 个答案:

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