Push notifications in Swift iOS - ios

Question

I am working with iOS Swift Notifications Module. I'm not getting the Alert/Banner Notification on the device.
I’m able to get notification when the App is open i.e. in Foreground, but not when app in in Background or Terminated.
Following is my code
import UIKit
import UserNotifications
import Firebase
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate, FIRMessagingDelegate {
var window: UIWindow?
// MARK: - Application Life Cycle
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
FIRApp.configure()
askNotificationPermission(application)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name.firInstanceIDTokenRefresh, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(self.getFirebaseInstaceID(_:)), name: NSNotification.Name.firInstanceIDTokenRefresh, object: nil)
connectToFcm()
return true
}
// MARK:- Push Notification Delegate Methods
#nonobjc func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
FIRInstanceID.instanceID().setAPNSToken(deviceToken, type: FIRInstanceIDAPNSTokenType.sandbox)
}
func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
print(error)
}
func applicationReceivedRemoteMessage(_ remoteMessage: FIRMessagingRemoteMessage) {
let appdata = remoteMessage.appData as NSDictionary as! [String: AnyObject]
print(appdata)
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any]) {
print(userInfo)
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any], fetchCompletionHandler completionHandler: #escaping (UIBackgroundFetchResult) -> Void) {
print(userInfo)
completionHandler(UIBackgroundFetchResult.newData)
}
// Receive displayed notifications for iOS 10 devices.
#available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
let userInfo = notification.request.content.userInfo
print("Message ID: \(userInfo["gcm.message_id"]!)")
print("%#", userInfo)
}
// MARK: - Permissions
func askNotificationPermission(_ application: UIApplication) {
if #available(iOS 10.0, *) {
let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
UNUserNotificationCenter.current().requestAuthorization(options: authOptions, completionHandler: { (finished, error) in
})
UNUserNotificationCenter.current().delegate = self
FIRMessaging.messaging().remoteMessageDelegate = self
} else {
let settings: UIUserNotificationSettings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
application.registerUserNotificationSettings(settings)
}
application.registerForRemoteNotifications()
}
// MARK: - Firebase Connection Methods
#objc func getFirebaseInstaceID(_ notification: Notification) {
if isNotNull(FIRInstanceID.instanceID().token() as AnyObject?) {
let strFirebaseInstanceID = FIRInstanceID.instanceID().token()! as String
if !strFirebaseInstanceID.isEmpty {
print("Firebase Instance ID - \(strFirebaseInstanceID)")
setString(strValue: strFirebaseInstanceID, forKey: Default.firebaseInstanceID)
NotificationCenter.default.post(name: Notification.Name(rawValue: Notifications.nSendFirebaseID), object: nil)
} else {
setString(strValue: "", forKey: Default.firebaseInstanceID)
}
} else {
setString(strValue: "", forKey: Default.firebaseInstanceID)
}
connectToFcm()
}
func connectToFcm() {
FIRMessaging.messaging().connect { (error) in
if (error != nil) {
print("Unable to connect with FCM. \(error)")
} else {
print("Connected to FCM.")
}
}
}
}

Answer 1

For iOS 10.*, you need to give push notification present option in completion handler of willPresent notification method list below. Try like this may be helpful.
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: #escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .badge, .sound])
}
Thanks.

Answer 2

As you are sending push using FCM, try sending this payload to FCM for push.
{
"to": "<REGISTRATION_TOKEN_HERE>",
"notification": {
"body": "Yipeee!!! I nailed it",
"sound" : "default"
},
"data" : ""
}

Answer 3

I forgot to add this method
didReceiveRemoteNotification