Show local notification when the app is opened in iOS

Question

I'm using flutter_local_notifications package and it's showing notifications when the app is opened (foreground) in Android but not in the iOS. The docs says:

For iOS 10+, use the presentation options to control the behaviour for when a notification is triggered while the app is in the foreground. The default settings of the plugin will configure these such that a notification will be displayed when the app is in the foreground.

If I understood it right, I don't need to do anything on my own except (correct me if I'm wrong and this is what the question is all about). This is the code I'm using. (Works in both iOS and Android except the foreground part)

Future<void> showNotification() async {
  final notificationPlugin = FlutterLocalNotificationsPlugin();
  const androidSettings = AndroidInitializationSettings('@mipmap/ic_launcher');
  const iOSSettings = IOSInitializationSettings();
  final initializationSettings = InitializationSettings(
    android: androidSettings,
    iOS: iOSSettings,
  );
  await notificationPlugin.initialize(
    initializationSettings,
    onSelectNotification: (payload) async {},
  );

  const androidNotificationDetails = AndroidNotificationDetails(
    'foo_id',
    'Foo Name',
    'Foo description ',
    importance: Importance.max, 
    priority: Priority.defaultPriority,
    showWhen: false,
  );

  await notificationPlugin.show(
    1211, 
    'Notification title',
    'Notification body',
    NotificationDetails(android: androidNotificationDetails),
    payload: 'item x',
  );
}

Answer 1

in AppDelegate.swift try add the following :

• Swift:

    if #available(iOS 10.0, *) {
              UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
            }
            func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
                     completionHandler([.alert, .badge, .sound])
                }

• Objective-C:

if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"10.0.0")) {
 (void)userNotificationCenter:(UNUserNotificationCenter *)center 
       willPresentNotification:(UNNotification *)notification 
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler;
}

Answer 2

Add this code to your project :

await FirebaseMessaging.instance.setForegroundNotificationPresentationOptions(
    alert: true,
    badge: true,
    sound: true,
  );