如何在cupertinoTimerPicker上增加天数或不限小时数？

Question

如何为CupertinoTimerPicker添加天数或不限时数？ 还是以任何方式无需使用CupertinoTimerPicker

来增加小时和分钟

  Widget time() {
    return CupertinoTimerPicker(
      mode: CupertinoTimerPickerMode.hm,
      minuteInterval: 1,
      secondInterval: 1,
      initialTimerDuration: initialtimer,
      onTimerDurationChanged: (Duration changedtimer) {
        setState(() {
          initialtimer = changedtimer;
        });
      },
    );
  }