Firebase Phone auth fails to pick up on remote notifications registration - ios

Question

Currently struggling with the following error showing up in logs:
<Error> [Firebase/Auth][I-AUT000015] The UIApplicationDelegate must handle remote notifcation for phone number authentication to work.
as well as this NSError object when calling verifyPhoneNumber:completion: :
#"NSLocalizedDescription" : #"If app delegate swizzling is disabled, remote notifications received by UIApplicationDelegate need to be forwarded to FIRAuth's canHandleNotificaton: method."
#"error_name" : #"ERROR_NOTIFICATION_NOT_FORWARDED"
Anyone know what this is about and how it can be solved?
I am using XCode 8.3.3, Firebase 4.0.0, I've switched OFF swizzling, and I already confirmed that I successfully register both for APNS (I see the token) and for FCM (I see this as well).
I used the sample code both in documentation and in the iOS cloud message github sample repo.
Before trying to integrate Firebase in the same project, I had Digits phone auth working flawlessly, and push notifications coming in both from AWS SNS and OneSignal.
Relevant code for Firebase-related parts:
AppDelegate
+ (void)initialize
{
FIROptions *firOptions = [[FIROptions alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:#"some-plist-name" ofType:#"plist"]];
[FIRApp configureWithOptions:firOptions];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[FIRMessaging messaging].delegate = self;
[FIRMessaging messaging].shouldEstablishDirectChannel = YES;
[UNUserNotificationCenter currentNotificationCenter].delegate = self;
// do some other setup stuff here ...
return YES;
}
#pragma mark - FIRMessagingDelegate
- (void)messaging:(nonnull FIRMessaging *)messaging didRefreshRegistrationToken:(nonnull NSString *)fcmToken {
// I get an fcmToken here as expected and notify the the relevant controller(s)
}
- (void)messaging:(nonnull FIRMessaging *)messaging didReceiveMessage:(nonnull FIRMessagingRemoteMessage *)remoteMessage {
}
#pragma mark - UNUserNotificationCenterDelegate
- (void)userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler {
NSDictionary *userInfo = notification.request.content.userInfo;
[[FIRAuth auth] canHandleNotification:userInfo];
completionHandler(UNNotificationPresentationOptionNone);
}
- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)())completionHandler {
completionHandler();
}
#pragma mark - Notifications
- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken {
FIRMessagingAPNSTokenType tokenType = FIRMessagingAPNSTokenTypeProd;
#if DEBUG && !TESTFLIGHT
tokenType = FIRMessagingAPNSTokenTypeSandbox;
#endif
[[FIRMessaging messaging] setAPNSToken:deviceToken type:tokenType];
}
- (void)application:(UIApplication*)application didFailToRegisterForRemoteNotificationsWithError:(NSError*)error {
}
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
[[FIRAuth auth] canHandleNotification:userInfo];
completionHandler(UIBackgroundFetchResultNewData);
}
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
[[FIRAuth auth] canHandleNotification:userInfo];
}
- (void)application:(UIApplication *) application handleActionWithIdentifier:(NSString *)identifier forRemoteNotification:(NSDictionary *)notification completionHandler:(void (^)())completionHandler {
completionHandler();
}
#end
Controller 1
...
UNAuthorizationOptions authOptions = UNAuthorizationOptionAlert | UNAuthorizationOptionSound | UNAuthorizationOptionBadge;
[[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:authOptions completionHandler:^(BOOL granted, NSError * _Nullable error) {
}];
[[UIApplication sharedApplication] registerForRemoteNotifications];
...
Controller 2 - after receiving APNS and FCM OK
...
[[FIRPhoneAuthProvider provider] verifyPhoneNumber:#"[phone]"
completion:^(NSString * _Nullable verificationID, NSError * _Nullable error) {
// Here is where I get that error.
}];
...

Answer 1

you have missed to add this method in your AppDelegate
func application(_ application: UIApplication,
didReceiveRemoteNotification notification: [AnyHashable : Any],
fetchCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void) {
if Auth.auth().canHandleNotification(notification) {
completionHandler(.noData)
return
}
// This notification is not auth related, developer should handle it.
handleNotification(notification)
}