[Bug]: IOS crash when hot restart

[alodevloper]

Required Reading

• Confirmed

Plugin Version

1.3.7

Flutter Doctor

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.27.4, on macOS 14.7.3 23H417 darwin-x64, locale en-GB)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.1)
[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2023.1)
[✓] VS Code (version 1.97.2)
[✓] Connected device (3 available)
[✓] Network resources

• No issues found!

Mobile operating-system(s)

• iOS
• Android

Device Manufacturer(s) and Model(s)

iphone 13 mini

Device operating-systems(s)

IOS 18.2

What happened?

Thank you for this great plugin!

I'm experiencing an issue where my app crashes on both a real device and a simulator after installing the package and performing a hot restart twice. I haven’t added any configuration for iOS yet, nor have I called initialize or started background fetch.

NOTE : in Android it works good without any problems

Plugin Code and/or Config

not yet

Relevant log output

Lost connection to device.

Exited.

[christocracy]

Without a stacktrace, I have nothing to comment on.

[alodevloper]

It's like conflict with flutter_uxcam package if i remove it it works no crash

[christocracy]

Show me a stacktrace.

[alodevloper]

resolved after re-install packages , but another problem raised

Error Logs:

flutter_background_fetch failed to start, status: 1
flutter: [BackgroundFetch] ERROR: PlatformException(1, null, 1, null)
com.transistorsoft/flutter_background_fetch failed to start, status: 1
[TSBackgroundFetch scheduleProcessingTask] <TSBGTask identifier=com.transistorsoft.fetch, delay=900, periodic=0 requiresNetworkConnectivity=0 requiresExternalPower=0, enabled=1>
[ERROR:flutter/runtime/dart_vm_initializer.cc(40)] Unhandled Exception: 1

Code Implementation:

import 'dart:developer';
import 'package:background_fetch/background_fetch.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:lax_mobile/core/core.dart';

class BackgroundFetchService {
  const BackgroundFetchService(this._ref);
  final Ref _ref;

  Future<void> initialize() async {
    try {
      log('Initializing BackgroundFetchService');
      var status = await BackgroundFetch.configure(
        BackgroundFetchConfig(
          minimumFetchInterval: 15,
          stopOnTerminate: true,
          enableHeadless: true,
          requiresBatteryNotLow: false,
          requiresCharging: false,
          requiresStorageNotLow: false,
          requiresDeviceIdle: false,
        ),
        _onBackgroundFetch,
        _onBackgroundFetchTimeout,
      );
      log('Background fetch configured with status: $status');
    } catch (e) {
      log('Error initializing background fetch: $e');
    }
  }

  Future<void> start() async {
    log('Starting background fetch');
    var status = await BackgroundFetch.start();
    log('Background fetch started with status: $status');
  }

  Future<void> stop() async {
    log('Stopping background fetch');
    var status = await BackgroundFetch.stop();
    log('Background fetch stopped with status: $status');
  }

  void _onBackgroundFetch(String taskId) async {
    log('Background fetch event received for task: $taskId');
    try {
      await _executeBackgroundTask(taskId);
      BackgroundFetch.finish(taskId);
    } catch (e) {
      log('Error executing background task: $e');
      BackgroundFetch.finish(taskId);
    }
  }

  void _onBackgroundFetchTimeout(String taskId) {
    log('Background fetch timed out for task: $taskId');
    BackgroundFetch.finish(taskId);
  }

  Future<void> _executeBackgroundTask(String taskId) async {
    log('Executing background task: $taskId');
    _ref.read(audioServiceProvider).stop();
    await Future.delayed(const Duration(seconds: 1));
    log('Background task completed: $taskId');
  }
}

Info.plist Configuration:

<key>BGTaskSchedulerPermittedIdentifiers</key>
<array>
    <string>com.transistorsoft.fetch</string>
    <string>com.transistorsoft.musictimer</string>
</array>
<key>UIBackgroundModes</key>
<array>
    <string>fetch</string>
    <string>remote-notification</string>
    <string>audio</string>
    <string>processing</string>
</array>