FCM notification is not working in iOS app - ios

Question

I am integrating FCM notification and cloud messaging in my app. I have followed exactly same steps mentioned in Firebase doc. Even I have tried with sample code given by FCM. It is just throwing some warnings as:
<FIRInstanceID/WARNING> Failed to fetch APNS token Error Domain=com.firebase.iid Code=1001 "The operation couldn’t be completed. and <FIRMessaging/WARNING> FIRMessaging registration is not ready with auth credentials.
My code written in Appdelegate.m is:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Register for remote notifications
if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1) {
// iOS 7.1 or earlier
UIRemoteNotificationType allNotificationTypes =
(UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge);
[application registerForRemoteNotificationTypes:allNotificationTypes];
} else {
// iOS 8 or later
// [END_EXCLUDE]
UIUserNotificationType allNotificationTypes =
(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
UIUserNotificationSettings *settings =
[UIUserNotificationSettings settingsForTypes:allNotificationTypes categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
// [START configure_firebase]
[FIRApp configure];
// [END configure_firebase]
// Add observer for InstanceID token refresh callback.
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(tokenRefreshNotification:)
name:kFIRInstanceIDTokenRefreshNotification object:nil];
return YES;
}
// [START receive_message]
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
// If you are receiving a notification message while your app is in the background,
// this callback will not be fired till the user taps on the notification launching the application.
// TODO: Handle data of notification
// Print message ID.
NSLog(#"Message ID: %#", userInfo[#"gcm.message_id"]);
// Pring full message.
NSLog(#"%#", userInfo);
}
// [END receive_message]
// [START refresh_token]
- (void)tokenRefreshNotification:(NSNotification *)notification {
// Note that this callback will be fired everytime a new token is generated, including the first
// time. So if you need to retrieve the token as soon as it is available this is where that
// should be done.
NSString *refreshedToken = [[FIRInstanceID instanceID] token];
NSLog(#"InstanceID token: %#", refreshedToken);
// Connect to FCM since connection may have failed when attempted before having a token.
[self connectToFcm];
// TODO: If necessary send token to appliation server.
}
// [END refresh_token]
// [START connect_to_fcm]
- (void)connectToFcm {
[[FIRMessaging messaging] connectWithCompletion:^(NSError * _Nullable error) {
if (error != nil) {
NSLog(#"Unable to connect to FCM. %#", error);
} else {
NSLog(#"Connected to FCM.");
}
}];
}
// [END connect_to_fcm]
- (void)applicationDidBecomeActive:(UIApplication *)application {
[self connectToFcm];
}
// [START disconnect_from_fcm]
- (void)applicationDidEnterBackground:(UIApplication *)application {
[[FIRMessaging messaging] disconnect];
NSLog(#"Disconnected from FCM");
}
// [END disconnect_from_fcm]

Answer 1

It appears that you need to have the "priority" set to "high" if you want the notification to get displayed while the app is in the background:
Firebase IOS push notification doesn't work when app is closed

Answer 2

I was doing the same thing with my iOS app. FCM and GCM DO NOT WORK with iOS. No matter what anyone says there is no chance that it will work. I spend 2 weeks and went everywhere on the net asking and looking a post. iOS will only accept APNS push notification . Save your self the headache and start with apps.
EDIT:
Here is the newest repository for FCM. Give this a shot and see what comes of it.
https://github.com/firebase/quickstart-ios
It seems a little different than the one I tried when I was working on my iOS version.
#Chris, is this the code branch that you used to implement your version?

Answer 3

I am also having same kind of issue. I get "Connected to FCM" message and token and seems everything integrated perfectly, yet unable to receive any notification.
However, I received notification at once but then after without any code change and certificate changes or removal, I am unable to receive any further notifications.
Check my code here, it's a cocos2d app.
func didLoadFromCCB()
{
...
setupPushNotification()
}
func setupPushNotification () {
let application = UIApplication.sharedApplication()
// Register for remote notifications
if #available(iOS 8.0, *) {
let settings: UIUserNotificationSettings =
UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)
application.registerUserNotificationSettings(settings)
application.registerForRemoteNotifications()
} else {
// Fallback
let types: UIRemoteNotificationType = [.Alert, .Badge, .Sound]
application.registerForRemoteNotificationTypes(types)
}
FIRApp.configure()
// Add observer for InstanceID token refresh callback.
NSNotificationCenter.defaultCenter().addObserver(self, selector: "tokenRefreshNotification:",
name: kFIRInstanceIDTokenRefreshNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "didBecomeActive:", name: UIApplicationDidBecomeActiveNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "didEnterBackground:", name: UIApplicationDidEnterBackgroundNotification, object: nil)
}
// [START refresh_token]
func tokenRefreshNotification(notification: NSNotification) {
let refreshedToken = FIRInstanceID.instanceID().token()!
print("InstanceID token: \(refreshedToken)")
// Connect to FCM since connection may have failed when attempted before having a token.
connectToFcm()
}
// [END refresh_token]
// [START connect_to_fcm]
func connectToFcm() {
FIRMessaging.messaging().connectWithCompletion { (error) in
if (error != nil) {
print("Unable to connect with FCM. \(error)")
} else {
print("Connected to FCM.")
}
}
}
// [END connect_to_fcm]
func didBecomeActive(application:UIApplication) {
NSLog("Did Become Active")
connectToFcm()
}
func didEnterBackground(application: UIApplication) {
NSLog("Did enter background")
FIRMessaging.messaging().disconnect()
NSLog("Disconnected from FCM.")
}
}
I don't know how I got that only one correct notification then it turned tables. :(
Let me know how to resolve this.,

Answer 4

try sending this
curl --header "Authorization: key={YOUR_API_KEY}" --header Content-Type:"application/json" https://fcm.googleapis.com/fcm/send -d "{\"to\":\"{YOUR_DEVICE_TOKEN}\",\"content_available\":true,\"priority\":\"high\",\"notification\":{\"title\":\"TEST\",\"sound\":\"default\",\"body\":\"IT WORKS!\",\"badge\":1}}"
It works for me. (Obviously, register for push notifications first then print out the device token)