push notification appearing in Xcode output but not showing on actual phone

Question

I am currently working on setting up Firebase push notifications with the console and with Firebase functions. I went through the documentation that was available on github to get everything setup, but for some reason nothing appears on my actual phone that I am testing it on, not the simulator. When I send a push notification from my Firebase console to my phone the message appears in my console, but there's no sound or banner that comes down wether i'm in my phone or not. This is the code I have in my app delegate.

import UIKit
import Firebase
import FirebaseMessaging
import UserNotifications
import FBSDKCoreKit
import Stripe

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?
let gcmMessageIDKey = "gcm.message_id"

    func application(_ application: UIApplication, didFinishLaunchingWithOptions
        launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    FIRApp.configure()

        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 })

            // For iOS 10 data message (sent via FCM)
            FIRMessaging.messaging().remoteMessageDelegate = self

        } else {
            let settings: UIUserNotificationSettings =
                UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
            application.registerUserNotificationSettings(settings)
            }

        application.registerForRemoteNotifications()



        NotificationCenter.default.addObserver(self,
                                               selector: #selector(self.tokenRefreshNotification),
                                               name: .firInstanceIDTokenRefresh,
                                               object: nil)

    FIRDatabase.database().persistenceEnabled = true
    let ref = FIRDatabase.database().reference()
        ref.keepSynced(true)

    FBSDKApplicationDelegate.sharedInstance().application(application,didFinishLaunchingWithOptions: launchOptions)
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

            return true
        }
    return true
           }


func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {

    let handled = FBSDKApplicationDelegate.sharedInstance().application(app, open: url, sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String!, annotation: options[UIApplicationOpenURLOptionsKey.annotation])

    return handled

}
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
 print("APNS token retrieved \(deviceToken)")
}
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
    print("This is the error that appeared when trying to prompt user for remotenotifications\(error)")
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {

    if let messageID = userInfo[gcmMessageIDKey] {
        print("Message ID: \(messageID)")
    }

    // Print full message.
    print(userInfo)
}

func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any],
                 fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {

    // TODO: Handle data of notification
    // Print message ID.
    if let messageID = userInfo[gcmMessageIDKey] {
        print("Message ID: \(messageID)")
    }

    // Print full message.
    print(userInfo)

    completionHandler(UIBackgroundFetchResult.newData)
}
// [END receive_message]
// [START refresh_token]
func tokenRefreshNotification(_ notification: Notification) {
    if 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() {
    // Won't connect since there is no token
    guard FIRInstanceID.instanceID().token() != nil else {
        return
    }

    // Disconnect previous FCM connection if it exists.
    FIRMessaging.messaging().disconnect()

    FIRMessaging.messaging().connect { (error) in
        if error != nil {
            print("Unable to connect with FCM. \(error?.localizedDescription ?? "")")
        } else {
            print("Connected to FCM.")
        }
    }
}

func applicationWillResignActive(_ application: UIApplication) {

}

func applicationDidEnterBackground(_ application: UIApplication) {

   print("entered background")
}

func applicationWillEnterForeground(_ application: UIApplication) {

}

func applicationDidBecomeActive(_ application: UIApplication) {

    connectToFcm()
}

func applicationWillTerminate(_ application: UIApplication) {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}
    @available(iOS 10, *)
extension AppDelegate : UNUserNotificationCenterDelegate {

    // Receive displayed notifications for iOS 10 devices.
    func userNotificationCenter(_ center: UNUserNotificationCenter,
                                willPresent notification: UNNotification,
                                withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        let userInfo = notification.request.content.userInfo
        // Print message ID.
        if let messageID = userInfo[gcmMessageIDKey] {
            print("Message ID: \(messageID)")
        }

        // Print full message.
        print(userInfo)

        // Change this to your preferred presentation option
        completionHandler([])
    }

    func userNotificationCenter(_ center: UNUserNotificationCenter,
                                didReceive response: UNNotificationResponse,
                                withCompletionHandler completionHandler: @escaping () -> Void) {
        let userInfo = response.notification.request.content.userInfo
        // Print message ID.
        if let messageID = userInfo[gcmMessageIDKey] {
            print("Message ID: \(messageID)")
        }

        // Print full message.
        print(userInfo)

        completionHandler()
    }
}
// [END ios_10_message_handling]
// [START ios_10_data_message_handling]
extension AppDelegate : FIRMessagingDelegate {
    // Receive data message on iOS 10 devices while app is in the foreground.
    func applicationReceivedRemoteMessage(_ remoteMessage: FIRMessagingRemoteMessage) {
        print(remoteMessage.appData)
    }
}

Answer 1

You need to pass 'UNNotificationPresentationOptions' in completion handler like this in 'willPresent notification' delegate method

completionHandler([.alert, .badge, .sound])

Thanks

Answer 2

Probably the app is running foregrounded, try to put the app in the background and try again. Check the settings of iPhone to see if banners are disabled for your app. Or if you are sending a silent push. Good luck.