Flutter PopupMenu更改图标颜色

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter PopupMenu',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        // 定义一个主题，并设置Popup菜单的图标颜色
        popupMenuTheme: PopupMenuThemeData(
          color: Colors.white,
          textStyle: TextStyle(color: Colors.black),
          icon: Icon(
            Icons.more_vert,
            color: Colors.red, // 设置图标颜色为红色
          ),
        ),
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter PopupMenu'),
      ),
      body: Center(
        child: PopupMenuButton<int>(
          itemBuilder: (context) => [
            PopupMenuItem(
              value: 1,
              child: Text('Option 1'),
            ),
            PopupMenuItem(
              value: 2,
              child: Text('Option 2'),
            ),
            PopupMenuItem(
              value: 3,
              child: Text('Option 3'),
            ),
          ],
          onSelected: (value) {
            // 处理选项选择的逻辑
          },
        ),
      ),
    );
  }
}