Flutter local notification doesn t work for iOS

Question

Hello flutter newbie here! I'm using flutter local notifications and adding the default code to my app. It works in Android but doesn't work in iOS. any idea why?

I tried with both the iOS simulator for iPhone 8 and iPhone 11. It works on my android emulator which is a Pixel 3 API 29.

I have also enabled the Notifications in iOS (Settings>this app>Notifications) for this app and gave the permissions.

For Android I have added permission requests in AndroidManifest.xml.

import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';


class AppNotification extends StatefulWidget {
  static const String id = 'app_notification';

  @override
  _AppNotificationState createState() => _AppNotificationState();
}

class _AppNotificationState extends State<AppNotification> {
  FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;

  @override
  void initState() {
    super.initState();
    flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
    var android = AndroidInitializationSettings('app_icon');
    var iOS = IOSInitializationSettings();
    var initSettings = InitializationSettings(android, iOS);

    flutterLocalNotificationsPlugin.initialize(initSettings,
        onSelectNotification: onSelectNotification);
  }

  Future onSelectNotification(String payload) async {
    debugPrint("payload : $payload");
    showDialog(
      context: context,
      builder: (_) {
        return AlertDialog(
          title: Text("PayLoad"),
          content: Text("Payload : $payload"),
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            FlatButton(
              child: Text('Notification'),
              onPressed: _showNotificationWithDefaultSound,
            ),
            FlatButton(
              onPressed: () {
                Navigator.pop(context);
              },
              child: Text('back'),
            )
          ],
        ),
      ),
    );
  }

  // TODO iOS doesn't work

  Future _showNotificationWithDefaultSound() async {
    var androidPlatformChannelSpecifics = new AndroidNotificationDetails(
        'your channel id', 'your channel name', 'your channel description',
        importance: Importance.Max, priority: Priority.High);
    var iOSPlatformChannelSpecifics = new IOSNotificationDetails();
    var platformChannelSpecifics = new NotificationDetails(
        androidPlatformChannelSpecifics, iOSPlatformChannelSpecifics);
    await flutterLocalNotificationsPlugin.show(
      0,
      'New Post',
      'How to Show Notification in Flutter',
      platformChannelSpecifics,
      payload: 'Default_Sound',
    );
  }

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Answer 1

I added This line in the "AppDelegate.swift" inside didFinishLaunchingWithOptions method and it solved my issue:

if #available(iOS 10.0, *) {
    UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
}