如何在Flutter中居中gridView项目？

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('Centered GridView'),
        ),
        body: Center(
          child: GridView.count(
            crossAxisCount: 2, // 每行显示的项目数量
            crossAxisSpacing: 10, // 项目之间的水平间距
            mainAxisSpacing: 10, // 项目之间的垂直间距
            children: List.generate(6, (index) {
              return Container(
                color: Colors.blue,
                child: Center(
                  child: Text(
                    'Item $index',
                    style: TextStyle(
                      color: Colors.white,
                      fontSize: 20,
                    ),
                  ),
                ),
              );
            }),
          ),
        ),
      ),
    );
  }
}