Allow Background Processing in iOS Flutter app

I’m creating a timer app in iOS utilizing Flutter. Consumer also can select to run the timer with background music.

Once I run the app on debug mode by connecting a bodily gadget, the app (timer) works when the display screen is locked or app is in background.

Nevertheless, on precise launch – it didn’t work the identical approach, i.e. timer didn’t replace when the app was on background/display screen locked. Apparently, when the music is enabled by the consumer, timer updates accurately even in background.

Q1: How can I check app behaviour earlier than publish? I couldn’t check this situation till it was printed on App Retailer. Now I’ve to deploy this repair.

Q2: What am I lacking right here? Will enabling “background processing” clear up the difficulty? This documentation talks about including “activity identifier” in Permitted background duties array. Is it the way it must be carried out? Ought to I take advantage of any flutter bundle to handle the identical?

Right here is my code for updating Timer:

import 'dart:async';

class TimerService {
  Timer? _timer;
  late Length _duration;

  void startTimer(
      Length length, Operate(Length) onTick, Operate onComplete) {
    _duration = length;
    _timer = Timer.periodic(const Length(seconds: 1), (timer) {
      if (_duration.inSeconds == 0) {
        _timer?.cancel();
        onComplete();
      } else {
        _duration -= const Length(seconds: 1);
        onTick(_duration);
      }
    });
  }

  void stopTimer() {
    _timer?.cancel();
  }

  Length get length => _duration;
}