Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Teams

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

I have a xamarin forms application and ios Notification service extension is not getting called when I receive notification from server.

I have done the following things so far:

    public class NotificationService : UNNotificationServiceExtension
        Action<UNNotificationContent> ContentHandler { get; set; }
        UNMutableNotificationContent BestAttemptContent { get; set; }
        protected NotificationService(IntPtr handle) : base(handle)
        public override void DidReceiveNotificationRequest(UNNotificationRequest request, Action<UNNotificationContent> contentHandler)
            ContentHandler = contentHandler;
            BestAttemptContent = (UNMutableNotificationContent)request.Content.MutableCopy();
            var newAlertContent = new UNMutableNotificationContent
                Body = "Body from Service",
                Title = "Title from Service",
                Sound = BestAttemptContent.Sound,
                Badge = 2
            ContentHandler(newAlertContent);
        public override void TimeWillExpire()
I also have the the notification service extension bundle id done.(My app bundle id is com.companyname.appname.test and the extension bundle id is com.companyname.appname.test.xxxxServiceExtension
In the AppDelegate class in Finishlaunching method I also have the permission code added.
  UNUserNotificationCenter.Current.RequestAuthorization(UNAuthorizationOptions.Alert, (approved, err) => {
Is there anything else that I need to do?
                May be the notifications disabled for your application (You can check it in settings of iOS).
– Andrew Romanov
                Oct 28, 2019 at 4:07
                @AndrewRomanov: I get the notification coming through to the app, but it does not show the Badge or the new contents that I am changing in the DidReceiveNotificationRequest method as part of test
– Libin Joseph
                Oct 28, 2019 at 4:10
                What's the deployment target of your extension? Make sure it is lower than the device system version which you are testing.
– nevermore
                Oct 28, 2019 at 8:10
                I now have the deployment target for the ios app set to 10.3 and notification extension to 10.2 But it still does not work. Anything else that I can check?
– Libin Joseph
                Oct 28, 2019 at 22:34
                Can you add a breakpoint there to check if the code triggered? Here is also an official sample you can refer.
– nevermore
                Oct 29, 2019 at 3:17
The system executes your notification content app extension only when a remote notification’s payload contains the following information:
The payload must include the mutable-content key with a value of 1.
The payload must include an alert dictionary with title, subtitle, or body information.
Listing 2 shows the JSON data for a notification payload containing encrypted data. The mutable-content flag is set so that the user’s device knows to run the corresponding service app extension, the code for which is shown in .
Listing 2 
Specifying the remote notification payload
   “aps” : {
      “category” : “SECRET”,
      “mutable-content” : 1,
      “alert” : {
         “title” : “Secret Message!”,
         “body”  : “(Encrypted)”
   “ENCRYPTED_DATA” : “Salted__·öîQÊ$UDì_¶Ù∞è   Ω^¬%gq∞NÿÒQùw”
Are you sure that you specify alert key?
                Turns out that i am getting the bade count working on ios 13, but not on 11 and 12. All these while I was testing  on 12. ANy idea?
– Libin Joseph
                Nov 5, 2019 at 3:22
                @LibinJoseph also apple wrote in documentation:  "Note -   You cannot modify silent notifications or those that only play a sound or badge the app’s icon."
– Mark
                Nov 5, 2019 at 19:28
                @LibinJoseph The user may change the allowed interactions at any time in system settings. Use the getNotificationSettings(completionHandler:) method to determine what interactions are currently allowed for your app. (in your main app appDelegate)  Also you could check right in iPhone settings for your app.(stackoverflow.com/a/24990541/9244718)
– Mark
                Nov 5, 2019 at 19:47
i saw something similar that drove me crazy a while back. i can't tell if what you're describing is what I was experiencing but i do remember the fix. i don't speak Xamarin.Forms, so best i can do is post the swift code, but i had to re register for notifications every time the app launched
func application(_ application: UIApplication,
                   didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
   // all your other config
   UIApplication.shared.registerForRemoteNotifications()
        
Thanks for contributing an answer to Stack Overflow!
Please be sure to answer the question. Provide details and share your research!
But avoid …
Asking for help, clarification, or responding to other answers.
Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.