如何使用flutter的showModalBottomSheet接收数据并更改其值？

String data = '';

showModalBottomSheet(
  context: context,
  builder: (BuildContext context) {
    return StatefulBuilder(
      builder: (BuildContext context, StateSetter setState) {
        return Container(
          // 弹出框的内容
        );
      },
    );
  },
);

TextField(
  onChanged: (value) {
    setState(() {
      data = value;
    });
  },
);

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: HomePage(),
    );
  }
}

class HomePage extends StatelessWidget {
  String data = '';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter Modal Bottom Sheet'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text('Open Bottom Sheet'),
          onPressed: () {
            showModalBottomSheet(
              context: context,
              builder: (BuildContext context) {
                return StatefulBuilder(
                  builder: (BuildContext context, StateSetter setState) {
                    return Container(
                      padding: EdgeInsets.all(16.0),
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: <Widget>[
                          TextField(
                            onChanged: (value) {
                              setState(() {
                                data = value;
                              });
                            },
                            decoration: InputDecoration(
                              labelText: 'Enter data',
                            ),
                          ),
                          RaisedButton(
                            child: Text('Close'),
                            onPressed: () {
                              Navigator.of(context).pop();
                            },
                          ),
                        ],
                      ),
                    );
                  },
                );
              },
            );
          },
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.check),
        onPressed: () {
          // 使用接收到的数据
          print('Received data: $data');
        },
      ),
    );
  }
}