Ways to retrieve FCM Token with Firebase?

Question

I am using Firebase trying to get the FCM Token so I can test Push notifications on an actual device. I get the APNS token fine, set it with

Messaging.messaging().apnsToken = deviceToken,

but when I try to use Messaging.messaging().fcmToken to get the FCM token, it returns nil, as well as

InstanceID.instanceID().instanceID { (result, error)  in } //returning nil.

However, when I use Messaging.messaging().retrieveFCMToken or InstanceID.instanceID().getID I get results, yet I see no one advocating for the use of these functions to get the FCM token. Are these functions correct ways to get the FCM token?

Also, didReceiveRegistrationToken is not firing off for some reason either, even though all my delegates are setup correctly and I am getting the apns token correctly — B Dub, Sep 17 '18 at 04:05
Yes Messaging.messaging().delegate = self is set after FirebaseApp.configure(), and UNUserNotificationCenter.current().delegate = self is set properly as well. — B Dub, Sep 17 '18 at 16:05

score 0 · Answer 1 · answered Sep 17 '18 at 05:13

Try this one it's work for me (swift 4 Code)

Request for permission

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    FirebaseApp.configure()
    self.setupFirebase(applicatin: application)
}

Setup Firebase registerUserNotificationSettings

func setupFirebase(applicatin:UIApplication)
{
    if #available(iOS 10.0, *) {
        let authOptions : UNAuthorizationOptions = [.alert, .badge , .sound]

        UNUserNotificationCenter.current().requestAuthorization(
        options: authOptions,
        completionHandler: {_,_ in })
        // For iOS 10 display notification (sent via APNS)
        UNUserNotificationCenter.current().delegate = self
        // For iOS 10 data message (sent via FCM)
        // FIRMessaging.messaging().remoteMessageDelegate = self
    } else {

        let notificationtype :UIUserNotificationType = [UIUserNotificationType.alert,UIUserNotificationType.badge,UIUserNotificationType.sound]
        let notificationsettings = UIUserNotificationSettings(types: notificationtype, categories: nil)

        applicatin.registerUserNotificationSettings(notificationsettings)
    }
    applicatin.registerForRemoteNotifications()
}

Getting device token

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {

    guard InstanceID.instanceID().token() != nil
        else {
            return
    }

    if let refreshedToken = InstanceID.instanceID().token()
    {
        print("InstanceID token: \(refreshedToken)")
    }
}

In case of error

func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
    print("Filed to register : \(error.localizedDescription)")
}

*InstanceID.instanceID().token()* has depricated, plz read this : https://stackoverflow.com/questions/50945015/firebase-instanceid-instanceid-token-method-is-deprecated/50945350#50945350 — Anbu.Karthik, Sep 17 '18 at 05:48

Ways to retrieve FCM Token with Firebase?

1 Answers1