Correct way to retrieve token for FCM - iOS 10 Swift 3

Question

i had implement Firebase with FirebaseAuth/FCM etc and did sent notification successfully through Firebase Console.

However i would need to push the notification from m

Answer 1

First of all, you should import all required libs

import Firebase
import UserNotifications

later in AppDelegate.swift call next function

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
    Messaging.messaging().apnsToken = deviceToken

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

Answer 2

confirm to MessagingDelegate protocol.

then you can add below delegate method and get the Firebase Token. (documentation https://firebase.google.com/docs/cloud-messaging/ios/client )

func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
        // send to remote server
        InstanceID.instanceID().instanceID { result, error in
            if let error = error {
                print("Error fetching remote instance ID: \(error)")
            } else if let result = result {
                print("Remote instance ID token: \(result.token)")
            }
        }
    }

Answer 3

This question is old but still if someone want to use in Objective C.

Latest Firebase: 6.27.0

In iOS Objective C we can use like this

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

and to get Instance Id:

 [[FIRInstanceID instanceID] getIDWithHandler:^(NSString *identity, NSError *error) {
         if (error != nil) {
           NSLog(@"Error : %@", error);
         } else {
           NSLog(@"instance ID: %@", identity);
         }
         NSLog(@"IID %@", identity);
       }];

Answer 4

Swift 3 + Firebase 4.0.4 :

static var FirebaseToken : String? {
    return InstanceID.instanceID().token()
}

Answer 5

Swift 4

Courtesy of: https://stackoverflow.com/a/50945350/1014164

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)")
    }
}

Answer 6

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {        
    Messaging.messaging().apnsToken = deviceToken

    let deviceTokenString = deviceToken.reduce("") { $0 + String(format: "%02X", $1) }

    print("APNs device token: \(deviceTokenString)"
}