[🐛] setBackgroundMessageHandler() is not working in IOS

[Chenjiujiu]

Issue

When I send a message with contentAvailable set to true,
The setBackgroundMessageHandler on the background device triggers normally,
But the onMessage on the foreground device does not trigger.

When I send a message with contentAvailable set to false,
The setBackgroundMessageHandler on the background device does not trigger,
But the onMessage on the foreground device triggers normally.

However, I want to send a message:
The background device triggers setBackgroundMessageHandler,
And the foreground device triggers onMessage.

So that I can collect the count of message arrivals.

---

Project Files.

package.json

Click To Expand

  "@react-native-firebase/app": "^19.2.2",
  "@react-native-firebase/messaging": "^19.2.2",
  "react": "18.2.0",
  "react-native": "0.72.6",

index.js.

Click To Expand

messaging().setBackgroundMessageHandler(async remoteMessage => {
  console.log('Received message', 'Background');
  return Promise.resolve();
});
messaging().onMessage(remoteMessage => {
  console.log('Received message', 'Foreground');
})

nodejs.

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const message = {
  token: token,
  data: {
    url: 'Product?handle=ccspud23122202222100',
  },
  notification: {
    title: "message test",
    body: now,
    imageUrl: "**********",
  },
  apns: {
    payload: {
      aps: {
        contentAvailable: false,
        sound: "default",
      },
    }
  },
  android: {
    priority: 'high',
  }
};
// send
admin.messaging().send(message)
  .then(( response ) => {
    console.debug(response);
  })
  .catch(( error ) => {
    console.debug(error);
  });

---

Environment

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react-native info output:

 OUTPUT GOES HERE

• Platform that you're experiencing the issue on:
  • iOS
  • Android
  • iOS but have not tested behavior on Android
  • Android but have not tested behavior on iOS
  • Both
• react-native-firebase version you're using that has this issue:
  • 19.2.2
• Firebase module(s) you're using that has the issue:
  • messaging
• Are you using TypeScript?
  • 4.8.4

---

• 👉 Check out React Native Firebase and Invertase on Twitter for updates on the library.

[mikehardy]

This is intended behavior based on the partial information in your issue
One type of FCM will be delivered in the background and trigger the background handler
One type of FCM will be posted more as a notification and trigger the foreground handler after user interaction

Suggestion: Make a more universal handler that can be registered for all the callbacks, count delivery in that single place.

Either way: without knowing the exact contents of the FCM you send to the device and the handler code (as a minimal reproducible example) I would not expect authoritative answers, as there is no authoritative information to work with