如何在checkboxlisttile中选中flutter中的多个复选框

onChanged: (bool value) {
  setState(() {
    selectedList[index] = value;
  });
},

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  List<bool> selectedList = List<bool>.filled(3, false); // 3个复选框

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('CheckboxListTile Example'),
        ),
        body: ListView.builder(
          itemCount: 3, // 3个复选框
          itemBuilder: (BuildContext context, int index) {
            return CheckboxListTile(
              title: Text('Checkbox $index'),
              value: selectedList[index],
              onChanged: (bool value) {
                setState(() {
                  selectedList[index] = value;
                });
              },
            );
          },
        ),
      ),
    );
  }
}