如何在Flutter中创建一个水平数字拾取器Widget？

import 'package:flutter/cupertino.dart';

class HorizontalNumberPicker extends StatefulWidget {
  @override
  _HorizontalNumberPickerState createState() => _HorizontalNumberPickerState();
}

class _HorizontalNumberPickerState extends State<HorizontalNumberPicker> {
  int selectedValue = 0;

  void onValueChanged(int value) {
    setState(() {
      selectedValue = value;
    });
  }

  @override
  Widget build(BuildContext context) {
    return CupertinoPicker(
      itemExtent: 50, // 每个选项的高度
      onSelectedItemChanged: onValueChanged,
      children: List<Widget>.generate(10, (index) {
        return Center(
          child: Text(
            index.toString(),
            style: TextStyle(fontSize: 20),
          ),
        );
      }),
    );
  }
}

HorizontalNumberPicker(),