Flutter 2.0 -如何在按下时更改TextButton闪屏颜色？

import 'package:flutter/material.dart';

class MyButton extends StatefulWidget {
  @override
  _MyButtonState createState() => _MyButtonState();
}

class _MyButtonState extends State<MyButton> {
  bool _isPressed = false; // 用于跟踪按钮是否被按下

  @override
  Widget build(BuildContext context) {
    return TextButton(
      style: ButtonStyle(
        backgroundColor: _isPressed ? MaterialStateProperty.all(Colors.blue) : null,
        // 设置按下时的背景颜色为蓝色，未按下时为默认值（null）
      ),
      onPressed: () {
        setState(() {
          _isPressed = !_isPressed; // 切换按钮状态
        });
      },
      child: Text('Press Me'),
    );
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Flutter 2.0 - Change TextButton Color')),
        body: Center(
          child: MyButton(), // 使用自定义的按钮
        ),
      ),
    );
  }
}

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