🐞[Is there a chance to update my UI from callbackDispatcher]

[2math]

• I have read the README
• I have done the setup for Android
• I have done the setup for iOS
• I have ran the sample app and it does not work there

Version

Technology	Version
Workmanager version	0.2.2
Xcode version
Swift version
iOS deployment target

Describe the error
Is there a chance to send messages to UI thread from BackgroundTaskHandler?

Currently my app is syncing with the server, but the UI does not update with new data until the widget is restarted. The Moor DB is updated but streams are not and I assume because the DB is updated from another isolate. There is an option to share DB btw isolates, but how can I pass DB isolate to BackgroundTaskHandler :( ?

Thanks in advance!
Output of flutter doctor -v

[nioncode]

I just went through this: you have to register a port somewhere in your widget tree where you want to receive the updates with the IsolateNameServer and then you can listen on that port:

var port = ReceivePort();
IsolateNameServer.registerPortWithName(port.sendPort, "yourUniqueChannelName");
port.listen((dynamic data) async {
  print('got $data on UI');
});

In your background task, you can then post updates to the UI isolate by doing:

final sendPort = IsolateNameServer.lookupPortByName("yourUniqueChannelName");
if (sendPort != null) {
  // The port might be null if the main isolate is not running.
  sendPort.send(['any', 'data', 'you', 'want']);
}

[2math]

I just went through this: you have to register a port somewhere in your widget tree where you want to receive the updates with the IsolateNameServer and then you can listen on that port:

var port = ReceivePort();
IsolateNameServer.registerPortWithName(port.sendPort, "yourUniqueChannelName");
port.listen((dynamic data) async {
  print('got $data on UI');
});

In your background task, you can then post updates to the UI isolate by doing:

final sendPort = IsolateNameServer.lookupPortByName("yourUniqueChannelName");
if (sendPort != null) {
  // The port might be null if the main isolate is not running.
  sendPort.send(['any', 'data', 'you', 'want']);
}

Sounds great, thanks!
Will test it out as soon as I'm back to the project, but it looks exactly as what I want.

[no-response]

This issue has been automatically closed because it was marked as "answered", and there wasn't any recent activity on this issue.

[kimmy-wang]

same issue