Flutter -如何在LinearProgressIndicator中添加跟随进度位置的标签

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('LinearProgressIndicator with Label'),
        ),
        body: Center(
          child: Stack(
            alignment: Alignment.centerLeft,
            children: [
              LinearProgressIndicator(
                value: 0.5, // 设置进度值
              ),
              Positioned(
                left: 0,
                child: Container(
                  padding: EdgeInsets.all(8),
                  child: Text(
                    '50%', // 进度标签
                    style: TextStyle(
                      color: Colors.white,
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}