Flutter -如何从子小部件更改底部导航中的文本？

import 'package:flutter/material.dart';

class BottomNavigationWidget extends StatefulWidget {
  @override
  _BottomNavigationWidgetState createState() => _BottomNavigationWidgetState();
}

class _BottomNavigationWidgetState extends State<BottomNavigationWidget> {
  int currentIndex = 0;

  void onTabTapped(int index) {
    setState(() {
      currentIndex = index;
    });
  }

  @override
  Widget build(BuildContext context) {
    List<Widget> widgetOptions = [
      Text('首页'),
      Text('消息'),
      Text('个人中心'),
    ];

    return Scaffold(
      appBar: AppBar(
        title: Text('底部导航'),
      ),
      body: Center(
        child: widgetOptions[currentIndex],
      ),
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: currentIndex,
        onTap: onTabTapped,
        items: [
          BottomNavigationBarItem(
            icon: Icon(Icons.home),
            label: '首页',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.message),
            label: '消息',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.person),
            label: '个人中心',
          ),
        ],
      ),
    );
  }
}

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