Firebase messaging doesn't work after app reinstalls - ios

Question

I am running into a very weird problem. After uninstalling and reinstalling my iOS 11 app (coded in swift), I have to launch the app multiple times (10 to 20) before my firebase messaging works again. I change nothing in the code (sometimes I just wait and hour or so) and for some reason it seems that Firebase Messaging Notifications only work after relaunching my app multiple times. It's very important for my app to be able to receive notifications right when it's first opened as my app is basically reliant on them. I just need to find a way to get notifications to work when I first launch the app after I install it. I've attached images of my code. (I have method_swizzling enabled)
If someone could please help me I would really appreciate it. I've seen youtube videos doing the same things I'm doing and they're able to get messages to work right away. I've tried a lot of what I've seen online and other questions that seem to be like this but none of their methods seem to work. Thank you so much to anyone who tries to help!
[edit]
This is the code for the application launch function:
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
application.statusBarStyle = ColorScheme.isDark ? .lightContent : .default
FirebaseApp.configure()
// Messaging.messaging().delegate = self
// Messaging.messaging().shouldEstablishDirectChannel = true
// UNUserNotificationCenter.current().requestAuthorization(options: [.badge, .alert, .sound]) { (granted, error) in }
// application.registerForRemoteNotifications()
setupMessaging(application: application)
}
This is the code for actually connecting and setting up my Firebase Messaging:
extension AppDelegate {
func setupMessaging(application: UIApplication) {
Messaging.messaging().delegate = self
Messaging.messaging().shouldEstablishDirectChannel = true
print("channel established", Messaging.messaging().isDirectChannelEstablished)
if #available(iOS 10.0, *) {
UNUserNotificationCenter.current().delegate = self
let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
UNUserNotificationCenter.current().requestAuthorization(options: authOptions, completionHandler: {_, _ in })
} else {
let settings: UIUserNotificationSettings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()
}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
Messaging.messaging().setAPNSToken(deviceToken, type: .sandbox)
//TODO: Change for release
}
func messaging(_ messaging: Messaging, didRefreshRegistrationToken fcmToken: String) {
}
}
And this is the debug functions that are called when I receive the notification:
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void) {
print("I got a notification")
print(userInfo)
}
func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
print("remote message received")
}
P.S. my AppDelegate extends MessagingDelegate and UNUserNotificationCenterDelegate

Answer 1

Please Check the below code
import Firebase
import FirebaseMessaging
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, MessagingDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
FirebaseApp.configure()
Messaging.messaging().delegate = self
//REMOTE NOTIFICATION
if #available(iOS 10.0, *) {
// For iOS 10 display notification (sent via APNS)
UNUserNotificationCenter.current().delegate = self
let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
UNUserNotificationCenter.current().requestAuthorization(
options: authOptions,
completionHandler: {_, _ in })
} else {
let settings: UIUserNotificationSettings =
UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()
Messaging.messaging().delegate = self
let token = Messaging.messaging().fcmToken
print("FCM token: \(token ?? "")")
if #available(iOS 10.0, *) {
UNUserNotificationCenter.current().delegate = self
} else {
// Fallback on earlier versions
}
return true
}
func application(_ application: UIApplication,
didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
Messaging.messaging().apnsToken = deviceToken as Data
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any]) {
// Print full message.
print(userInfo)
}
// This method will be called when app received push notifications in foreground
#available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void)
{
completionHandler([UNNotificationPresentationOptions.alert,UNNotificationPresentationOptions.sound,UNNotificationPresentationOptions.badge])
}
// MARK:- Messaging Delegates
func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
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)")
}
}
}
func messaging(_ messaging: Messaging, didReceive remoteMessage: MessagingRemoteMessage) {
print("received remote notification")
}
}

Answer 2

I found the answer! The problem was that I was using the online console firebase provides to send my test messages. I guess it time to register devices. I switched over to firebase functions to send my notification and then subscribed to a test topic with my phone and that fixed everything. I get notifications on first app launch now and I'm happy