Flutter -如何在flutter中自动刷新标记

bool refreshFlag = false;

setState(() {
  refreshFlag = true;
});

if (refreshFlag) {
  // 标记为true时，执行需要刷新的操作
  // 例如，更新UI、重新加载数据等
  refreshFlag = false; // 执行完刷新操作后，将标记重置为false
}

import 'package:flutter/material.dart';

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  bool refreshFlag = false;

  Future<void> _handleRefresh() async {
    setState(() {
      refreshFlag = true;
    });

    // 模拟刷新操作
    await Future.delayed(Duration(seconds: 2));

    setState(() {
      refreshFlag = false;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('自动刷新标记示例'),
      ),
      body: RefreshIndicator(
        onRefresh: _handleRefresh,
        child: ListView(
          children: <Widget>[
            // 列表项
            ListTile(
              title: Text('列表项1'),
            ),
            ListTile(
              title: Text('列表项2'),
            ),
            // ...
          ],
        ),
      ),
    );
  }
}