Flutter - bottom sheet如何将文本字段移动到底部

class BottomSheetExample extends StatefulWidget {
  @override
  _BottomSheetExampleState createState() => _BottomSheetExampleState();
}

class _BottomSheetExampleState extends State<BottomSheetExample> {
  @override
  Widget build(BuildContext context) {
    // TODO: Build bottom sheet UI here
  }
}

Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: Text('Bottom Sheet Example'),
    ),
    body: Center(
      child: ElevatedButton(
        child: Text('Open Bottom Sheet'),
        onPressed: () {
          showModalBottomSheet(
            context: context,
            builder: (BuildContext context) {
              return Container(
                child: Column(
                  children: <Widget>[
                    TextField(
                      decoration: InputDecoration(labelText: 'Your Text'),
                    ),
                    // Add more form fields here
                  ],
                ),
              );
            },
          );
        },
      ),
    ),
  );
}

void main() {
  runApp(MaterialApp(
    title: 'Flutter Bottom Sheet Example',
    home: BottomSheetExample(),
  ));
}