Flutter -如何根据if和else语句的值在单击时切换RaisedButton的颜色

import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Color buttonColor = Colors.blue; // 初始颜色为蓝色

  void _toggleButtonColor() {
    setState(() {
      if (buttonColor == Colors.blue) {
        buttonColor = Colors.red; // 如果当前颜色为蓝色，则切换为红色
      } else {
        buttonColor = Colors.blue; // 如果当前颜色为红色，则切换为蓝色
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter App'),
      ),
      body: Center(
        child: RaisedButton(
          onPressed: _toggleButtonColor,
          color: buttonColor, // 根据变量设置按钮颜色
          child: Text(
            'Toggle Color',
            style: TextStyle(color: Colors.white),
          ),
        ),
      ),
    );
  }
}

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}