如何在flutter中导航到小部件的父级

import 'package:flutter/material.dart';

class ChildWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      child: Text('Go to Parent Widget'),
      onPressed: () {
        Navigator.pop(context); // 导航回父级
      },
    );
  }
}

class ParentWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Parent Widget'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text('Go to Child Widget'),
          onPressed: () {
            Navigator.push(
              context,
              MaterialPageRoute(builder: (context) => ChildWidget()),
            ); // 导航到子部件
          },
        ),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: ParentWidget(),
  ));
}