如何在flutter中使用GridView控件编辑项目？

dependencies:
  flutter:
    sdk: flutter
  flutter_staggered_grid_view: ^0.4.0

import 'package:flutter/material.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';

class MyGridView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('GridView Example'),
      ),
      body: StaggeredGridView.countBuilder(
        crossAxisCount: 4,
        itemCount: 8,
        itemBuilder: (BuildContext context, int index) => Container(
          color: Colors.green,
          child: Center(
            child: Text('Item $index'),
          ),
        ),
        staggeredTileBuilder: (int index) =>
            StaggeredTile.count(2, index.isEven ? 2 : 1),
        mainAxisSpacing: 4.0,
        crossAxisSpacing: 4.0,
      ),
    );
  }
}

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