[FIREBASE_MESSAGING] Unhandled Exception: MissingPluginException(No implementation found for method ****** on channel plugins.flutter.io/firebase_messaging) on IOS

[Yirmeyah-d]

I'm getting those error when using FCM plugin in IOS, anyone know why and how I can solve this issue ?

════════════════════════════════════════════════════════════════════════════════════════════════════
[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method requestNotificationPermissions on channel plugins.flutter.io/firebase_messaging)
#0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7)
<asynchronous suspension>
#1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12)
#2      FirebaseMessaging.requestNotificationPermissions (package:firebase_messaging/firebase_messaging.dart:87:21)
#3      _HomeState.getIOSPermission (package:in_jesus_name/screens//home.dart:153:24)
#4      _HomeState.configurePushNotificationsFirebaseUser (package:in_jesus_name/screens//home.dart:227:7)
<asynchronous suspension>
#5      _HomeState.handleFirebaseSignIn (package:in_jesus_name/screens//home.dart:143:9)
<asynchronous suspension>
#6      _HomeState.initState.<anonymous closure> (package:in_jesus_name/screens//home.dart:822:7)
#7      _rootRunUnary (dart:async/zone.dart:1192:38)
#8  <…>
[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method getToken on channel plugins.flutter.io/firebase_messaging)
#0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7)
<asynchronous suspension>
#1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12)
#2      FirebaseMessaging.getToken (package:firebase_messaging/firebase_messaging.dart:150:27)
#3      _HomeState.configurePushNotificationsFirebaseUser (package:in_jesus_name/screens//home.dart:245:24)
#4      _rootRunUnary (dart:async/zone.dart:1192:38)
#5      _CustomZone.runUnary (dart:async/zone.dart:1085:19)
#6      _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
#7      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
#8      Future._propagateToListeners (dart:async/future_impl.dart:711:32)
#9      Future._completeWithValue (dart:async/future_impl.dart:526:5)
<…>
[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method configure on channel plugins.flutter.io/firebase_messaging)
#0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:154:7)
<asynchronous suspension>
#1      MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:329:12)
#2      FirebaseMessaging.configure (package:firebase_messaging/firebase_messaging.dart:114:14)
#3      _HomeState.configurePushNotificationsFirebaseUser (package:in_jesus_name/screens//home.dart:250:24)
#4      _rootRunUnary (dart:async/zone.dart:1192:38)
#5      _CustomZone.runUnary (dart:async/zone.dart:1085:19)
#6      _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
#7      Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
#8      Future._propagateToListeners (dart:async/future_impl.dart:711:32)
#9      Future._completeWithValue (dart:async/future_impl.dart:526:5<…>

Here my flutter doctor :

flutter doctor -v
[✓] Flutter (Channel stable, v1.17.4, on Mac OS X 10.15.4 19E287, locale fr-FR)
    • Flutter version 1.17.4 at /Users/jeremydormevil/SDK/flutter
    • Framework revision 1ad9baa8b9 (2 weeks ago), 2020-06-17 14:41:16 -0700
    • Engine revision ee76268252
    • Dart version 2.8.4

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.0)
    • Android SDK at /Users/jeremydormevil/Library/Android/sdk
    • Platform android-30, build-tools 30.0.0
    • Java binary at: /Applications/Android
      Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build
      1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.5)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.5, Build version 11E608c
    • CocoaPods version 1.9.3

[✓] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 47.0.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build
      1.8.0_242-release-1644-b3-6222593)

[✓] Connected device (1 available)
    • iPhone SE (2nd generation) • C3648C6D-68FB-47FA-A311-7D398AFF4540 • ios •
      com.apple.CoreSimulator.SimRuntime.iOS-13-5 (simulator)

• No issues found!

And a code sample where those error came from :
[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method requestNotificationPermissions on channel plugins.flutter.io/firebase_messaging)

getIOSPermission() {
    _firebaseMessaging.requestNotificationPermissions(
        IosNotificationSettings(alert: true, badge: true, sound: true));
    _firebaseMessaging.onIosSettingsRegistered.listen((settings) {
      print("Settings registered:$settings");
    });
  }

[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method getToken on channel plugins.flutter.io/firebase_messaging)

    _firebaseMessaging.getToken().then((token) {
      print("Firebase Messaging Token: $token\n");
      usersRef.document(firebaseUser.uid).updateData({"FCMToken": token});
    });

[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: MissingPluginException(No implementation found for method configure on channel plugins.flutter.io/firebase_messaging)

_firebaseMessaging.configure(
      onLaunch: onPush,
      onResume: onPush,
      onMessage: onPush,
      onBackgroundMessage: Platform.isIOS ? null :onBackgroundPush,
    );
 }

here my AppDelegate.swift

import UIKit
import Flutter
import Firebase

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
    }
    FirebaseApp.configure()
    GeneratedPluginRegistrant.register(with: self)
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }

}

[TahaTesser]

duplicate of #2829