使用RefreshIndicator刷新Flutter中的类

import 'package:flutter/material.dart';

class MyPage extends StatefulWidget {
  @override
  _MyPageState createState() => _MyPageState();
}

class _MyPageState extends State<MyPage> {
  ScrollController _scrollController;

  @override
  void initState() {
    super.initState();
    _scrollController = ScrollController();
  }

  Future<void> _refreshData() async {
    // 执行刷新数据的逻辑
    // ...

    // 模拟异步加载数据
    await Future.delayed(Duration(seconds: 2));

    // 刷新完成后，调用setState方法更新UI
    setState(() {
      // 更新数据
      // ...
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('下拉刷新示例'),
      ),
      body: RefreshIndicator(
        onRefresh: _refreshData,
        child: ListView.builder(
          controller: _scrollController,
          itemCount: 10,
          itemBuilder: (context, index) {
            return ListTile(
              title: Text('Item $index'),
            );
          },
        ),
      ),
    );
  }
}