flutter_background_service

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Hello!

I'm having issues when using the library for iOS in Release mode, it works in the simulators, but when I test it with Testflight it doesn't work, only works in foreground, but as soon as I move the app to background it stops...

I was able to make it work adding @pragma('vm:entry-point'), this works in the simulators (in debug mode), but I cannot test it if I terminate the app on it.

my code looks like:

// I added also here, just in case
@pragma('vm:entry-point')
initializeApp() async {
  final service = FlutterBackgroundService();

  await service.configure(
    androidConfiguration: AndroidConfiguration(
      onStart: onStart,
      autoStart: true,
      isForegroundMode: true,
    ),
    iosConfiguration: IosConfiguration(
      autoStart: true,
      onForeground: onStart,
      onBackground: onIosBackground,
    ),
  );
  service.startService();
}

@pragma('vm:entry-point')
Future<bool> onIosBackground(ServiceInstance serviceInstance) async {
  return true;
}

@pragma('vm:entry-point')
onStart(ServiceInstance service) async {
  DartPluginRegistrant.ensureInitialized();
  // if (service is AndroidServiceInstance) {
  //   service.on('setAsForeground').listen((event) {
  //     service.setAsForegroundService();
  //   });

  //   service.on('setAsBackground').listen((event) {
  //     service.setAsBackgroundService();
  //   });
  // }

  service.on('stopService').listen((event) {
    service.stopSelf();
  });

// I setted it to 5" to have a quick feedback
  Timer.periodic(const Duration(seconds: 5), (timer) async {
    // if (service is AndroidServiceInstance) {
    //   service.setForegroundNotificationInfo(
    //     title: "My App Service",
    //     content: "Updated at ${DateTime.now()}",
    //   );
    // }

    print('FLUTTER BACKGROUND SERVICE: ${DateTime.now()}');
    await httpReq();

    service.invoke(
      'update',
      {
        "current_date": DateTime.now().toIso8601String(),
      },
    );
  });
}

In the Info.plist I have (among others):

	<key>UIBackgroundModes</key>
	<array>
		<string>fetch</string>
		<string>location</string>
		<string>processing</string>
		<string>remote-notification</string>
	</array>
	<key>BGTaskSchedulerPermittedIdentifiers</key>
	<array>
		<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
	</array>

I don't have the custom task identifier, so I consider is not needed to add it to the ios/Runner/AppDelegate.swift, or is it required?

SwiftFlutterBackgroundServicePlugin.taskIdentifier = "your.custom.task.identifier"

The capabilities in xcode looks like:

My goal is to create a task in the background to update the app every 1-5h, running an HTTP request, would that be possible with this library or should I do it with the native swift?

iOS doesn’t have long running background service like android. The alternative way is using background fetch, it’s more like alarm manager in android. Please read the apple documentation about background fetch for more detail.

iOS doesn’t have long running background service like android. The alternative way is using background fetch, it’s more like alarm manager in android. Please read the apple documentation about background fetch for more detail.

do you mean this library: flutter_background_fetch?