Firebase InstanceID.instanceID().token() method is deprecated

Question

I am working with swift and firebase. Previously I was using following method to get firebase token which then I was using to store into database to send notifications.

InstanceID.instanceID().token()

Now this method is showing as deprecated since i have updated my firebase.

'token()' is deprecated: Use instanceIDWithHandler: instead.

I don't know how to use instanceIDWithHandler i have tried following but don't know how to get token.

func instanceID(handler: @escaping InstanceIDResultHandler){

    }

Please help. Thank you in advance.

Answer 1

Fetching the current registration token

Registration tokens are delivered via the method messaging:didReceiveRegistrationToken:. This method is called generally once per app start with an FCM token. When this method is called, it is the ideal time to:

• If the registration token is new, send it to your application server.

• Subscribe the registration token to topics. This is required only for new subscriptions or for situations where the user has re-installed the app.

You can retrieve the token directly using instanceIDWithHandler:. This callback provides an InstanceIDResult, which contains the token. A non null error is provided if the InstanceID retrieval failed in any way.

You should import FirebaseInstanceID

  import FirebaseInstanceID

objective C

on your getTokenMethod

[[FIRInstanceID instanceID] instanceIDWithHandler:^(FIRInstanceIDResult * _Nullable result,
                                                NSError * _Nullable error) {
    if (error != nil) {
        NSLog(@"Error fetching remote instance ID: %@", error);
    } else {
        NSLog(@"Remote instance ID token: %@", result.token);
    }
}];

Swift

InstanceID.instanceID().instanceID { result, error in
    if let error = error {
        print("Error fetching remote instange ID: \(error)")
    } else if let result = result {
        print("Remote instance ID token: \(result.token)")
    }
}

Update

InstanceID is now deprecated. Try

Messaging.messaging().token { token, error in
   // Check for error. Otherwise do what you will with token here
}