每天在dart中重新启动订单编号计数

int orderCount = 0;

import 'package:intl/intl.dart';

void resetOrderCount() {
  DateTime now = DateTime.now();
  DateTime previousDay = now.subtract(Duration(days: 1));

  String nowDate = DateFormat('yyyy-MM-dd').format(now);
  String previousDayDate = DateFormat('yyyy-MM-dd').format(previousDay);

  if (nowDate != previousDayDate) {
    orderCount = 0;
  }
}

String generateOrderNumber() {
  resetOrderCount(); // 确保每天开始时重置订单编号计数器

  String datePrefix = DateFormat('yyyyMMdd').format(DateTime.now());
  String orderNumber = '$datePrefix-${orderCount.toString().padLeft(4, '0')}';

  orderCount++; // 增加订单编号计数器

  return orderNumber;
}