Wsrtjtyk

I have an App - Android and iOS with a partial web view.

I'm using a C# API back end and notifications via Firebase Cloud messaging works fine for Android, especially subscribing and unsubscribing to topics using the "registered" FM token.

Every time I try to subscribe to a topic using a FCM token that comes from an iOS device it fails.

I'm using very simple code to add tokens to topics e.g.

using (var httpRequest = new HttpRequestMessage(HttpMethod.Post, "https://iid.googleapis.com/iid/v1/" + [fcmToken] + "/rel/topics/" + [topic name]))
{

httpRequest.Headers.TryAddWithoutValidation("Authorization", [server key]);

httpRequest.Headers.TryAddWithoutValidation("Sender", [sender id]);

httpRequest.Content = new StringContent(jsonBody, Encoding.UTF8, "application/json");



using (var httpClient = new HttpClient())

{

    var result = await httpClient.SendAsync(httpRequest);

    if (result.IsSuccessStatusCode)

    {

        //success

    }

    else

    {

       //failed

    }

}

}

Has anyone had any experience like this or a solution that I'm missing as to why iOS tokens are not getting subscribed to topics?

Seeing as your code works fine for Android, but not for iOS I would follow the differences you need to pay attention to:

• Did you initialize Firebase correctly for iOS? You might need to manually map your APN token to the Firebase token (https://firebase.google.com/docs/cloud-messaging/ios/client)


• Did you upload the APN certificate to Firebase? (https://firebase.google.com/docs/cloud-messaging/ios/certs)


• Do you correctly use the Notification Center if you want to display notifications?