MissingPluginException for 'FcmDartService#start' on iOS

[tkeithblack]

Defining 'onBackgroundMessage' in firebaseMessaging.configure(...) causes a MissingPluginException under iOS because there is no MethodChannel definition for "FcmDartService#start" in the iOS implementation.

firebaseMessaging.configure(
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message");
      },
      onBackgroundMessage: backgroundMessageHandler,  // <- causes exception on iOS.
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");
      },
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");
      },
    );

Version: firebase_messaging 6.0.15

[philipgiuliani]

iOS is currently not supported. You have to write it like this:

import 'dart:io';
....
onBackgroundMessage: Platform.isAndroid ? backgroundMessageHandler : null,

There is a fix PR open: #2180

[iapicca]

Hi @tkeithblack
I see there's an open issue addressing the case you described.
Please follow up on that issue,
I'm closing the current one as duplicate.
If you disagree please write in the comments
and I will reopen it.
Thank you

[tkeithblack]

Hi @tkeithblack
I see there's an open issue addressing the case you described.
Please follow up on that issue,
I'm closing the current one as duplicate.
If you disagree please write in the comments
and I will reopen it.
Thank you

Thank you @iapicca. Probably should update the plugin docs showing this is not supported for iOS.

Keith