Firebase Push Notifications not opening on iOS devices

[dev-catalyst]

I have developed a flutter app and I am using Firebase cloud messaging for push notifications. I have done all the configuration for iOS device and I am receiving the push notifications as well but when I click on the notification it is not opening the respective screen on the app. Everything is working fine on Android. On notification click it opens the app screen but I am having trouble with iOS devices only.

Here is my flutter doctor output:

[✓] Flutter (Channel stable, v1.12.13+hotfix.8, on Mac OS X 10.15.3 19D76, locale en-IN)
    • Flutter version 1.12.13+hotfix.8 at /Users/riyabarua/development/flutter
    • Framework revision 0b8abb4724 (6 weeks ago), 2020-02-11 11:44:36 -0800
    • Engine revision e1e6ced81d
    • Dart version 2.7.0

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /Users/riyabarua/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
    ✗ Android license status unknown.
      Try re-installing or updating your Android SDK Manager.
      See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed
      instructions.

[✓] Xcode - develop for iOS and macOS (Xcode 11.3.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.3.1, Build version 11C504
    • CocoaPods version 1.7.5

[!] Android Studio (version 3.6)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] Connected device (1 available)
    • iPhone 11 Pro Max • 21C3B3CA-BA43-45F3-9A49-28B9C29AABC0 • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-3 (simulator)

! Doctor found issues in 2 categories.

Here is my AppDelegate.swift code:

import UIKit
import Flutter
import GoogleMaps
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
  _ application: UIApplication,
  didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
  GMSServices.provideAPIKey("AIzaSyA7WnMXO960l9OOt0znIfbRuEUThY2fnk0")
    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
    }
  GeneratedPluginRegistrant.register(with: self)
  return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
}

I have also added the following code to Info.plist:

<key>FirebaseScreenReportingEnabled</key>
<true/>
<key>FirebaseAppDelegateProxyEnabled</key>
<true/>

[TahaTesser]

Hi @dev-catalyst

can you please provide your flutter doctor -v and flutter run --verbose?

Can you print onLaunch on iOS?

     print('run onLaunch');
     print('onLaunch: $message');

Related to #1619

Thank you

[dev-catalyst]

Hi @TahaTesser,

Output for flutter doctor -v:

[✓] Flutter (Channel stable, v1.12.13+hotfix.8, on Mac OS X 10.15.3 19D76, locale en-IN)
    • Flutter version 1.12.13+hotfix.8 at /Users/riyabarua/development/flutter
    • Framework revision 0b8abb4724 (6 weeks ago), 2020-02-11 11:44:36 -0800
    • Engine revision e1e6ced81d
    • Dart version 2.7.0

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /Users/riyabarua/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.3
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)
    ✗ Android license status unknown.
      Try re-installing or updating your Android SDK Manager.
      See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed instructions.

[✓] Xcode - develop for iOS and macOS (Xcode 11.3.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.3.1, Build version 11C504
    • CocoaPods version 1.7.5

[!] Android Studio (version 3.6)
    • Android Studio at /Applications/Android Studio.app/Contents
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_212-release-1586-b4-5784211)

[✓] Connected device (1 available)
    • iPhone 11 Pro Max • 21C3B3CA-BA43-45F3-9A49-28B9C29AABC0 • ios • com.apple.CoreSimulator.SimRuntime.iOS-13-3 (simulator)

! Doctor found issues in 2 categories.

Flutter run verbose output is in this google doc link - https://drive.google.com/file/d/1B23NjEfUqFgybXR4EZcOg_7y5WjVosYa/view?usp=sharing

onLaunch and onResume both events are not firing.

Please check it out and help with a solution.

[MaikuB]

@dev-catalyst what version of the plugin are you using? I believe the plugin may have a mistake around needing to modify AppDelegate. With version 6.0.13 onwards, this should only be needed when FirebaseAppDelegateProxyEnabled is set to false

[dev-catalyst]

@MaikuB I'm using 6.0.13 version of the plugin. So, I don't need to modify AppDelegate at all if I don't set FirebaseAppDelegateProxyEnabled to false. But I also tried it this way and was still facing the same issue.

[MaikuB]

In that case I'm not sure what's is wrong there as it worked for me. I tested this but by modifying code I have at https://github.com/MaikuB/flutter_firebase_local_notifications_examples. After i removed all references to flutter_local_notifications and updated the pubspec file to point to the latest version of firebase_messaging and reverted the modification to the AppDelegate file, this was working fine. Perhaps you can do a comparison and see if there's something missing in your iOS app. Have you also turned on the remote notification capability (see https://developer.apple.com/documentation/usernotifications/setting_up_a_remote_notification_server/pushing_background_updates_to_your_app)?

[dev-catalyst]

I was able to resolve this issue by making some changes in the Info.plist and AppDelegate.swift

I added this at the end of Info.plist

<key>FirebaseAppDelegateProxyEnabled</key>
<true/>

and this is my AppDelegate.swift after making some changes

import UIKit
import Flutter
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
  _ application: UIApplication,
  didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
  GeneratedPluginRegistrant.register(with: self)
  if #available(iOS 10.0, *) {
    UNUserNotificationCenter.current().delegate = self as? UNUserNotificationCenterDelegate
  }
  return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
    @available(iOS 10.0, *)
    override func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        completionHandler([.alert,.sound,.badge])
    }
}

I also changed the way I was fetching the data in my notification handler to navigate to a particular screen

onResume: (Map<String, dynamic> message) async {
     if (Platform.isIOS) {
        _navigationService.navigateTo(
        routes.EventDetail,
           arguments: '${message["eventId"]}',
        );
      } else {
        _navigationService.navigateTo(
         routes.EventDetail,
           arguments: '${message["data"]["eventId"]}',
         );
      }
 },