ios FCM messaging didReceiveRemoteMessage not called - ios

Question

I want to use FCM to send notifications and data messages to iOS Devices.
All works fine, but for some reason the delegate method messaging didReceiveRemoteMessage is never called. Therefore I cannot get data messages when the app is in the foreground... I tried it with and without a notification block beside the data. So the message I am sending looks like this:
{'message': {
'token': 'mytokenstandshere',
'notification': {
'body': 'message',
'title': 'title'},
'data': {
'datafield': 'datavalue',
'datafield2': 'datavalue2'}
}}
I tried all possibilities (without notification, without data, with both). Notification is working without problems, but the data block is not appearing in clean data messages.
I just want to have this running on iOS 11+. But I even tried it with the parts for iOS 9 and 10 from the docs from google.
This is my AppDelegate:
#
UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, MessagingDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
Hardware.start()
Preferences.initDefaults()
FirebaseApp.configure()
Messaging.messaging().delegate = self
Messaging.messaging().shouldEstablishDirectChannel = true
UNUserNotificationCenter.current().delegate = self
let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
UNUserNotificationCenter.current().requestAuthorization(
options: authOptions,
completionHandler: {_, _ in })
application.registerForRemoteNotifications()
return true
}
func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
print("new Token: \(fcmToken)")
Messaging.messaging().subscribe(toTopic: TOPIC_ALL_MESSAGES)
NotificationSettingsListener.start()
}
func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
print("Got a remote")
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void) {
completionHandler(UIBackgroundFetchResult.newData)
}
}
#available(iOS 10, *)
extension AppDelegate : UNUserNotificationCenterDelegate {
func userNotificationCenter(_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
let userInfo = notification.request.content.userInfo
// Print full message.
print(userInfo)
// Change this to your preferred presentation option
completionHandler([.alert])
}
func userNotificationCenter(_ center: UNUserNotificationCenter,
didReceive response: UNNotificationResponse,
withCompletionHandler completionHandler: #escaping () -> Void) {
let userInfo = response.notification.request.content.userInfo
// Print full message.
print(userInfo)
completionHandler()
}
}

Answer 1

I'm not seeing:
application(_: didReceiveRemoteNotification: fetchCompletionHandler:)
I believe that's required for handling. Reference

Answer 2

Please make sure you have to assign Firebase messaging delegate in AppDelegate.m
[FIRMessaging messaging].delegate = self;