# 创建一个网格列表

> 如何实现一个网格列表。



<?code-excerpt path-base="cookbook/lists/grid_lists"?>

In some cases, you might want to display your items as a grid rather than
a normal list of items that come one after the next.
For this task, use the [`GridView`][] widget.

有时候，你可能希望用网格来展示内容，而不是一条接着一条的普通列表来展示。
在本文当中，我们将采用 [`GridView`][] widget。

The simplest way to get started using grids is by using the
[`GridView.count()`][] constructor,
because it allows you to specify how many rows or columns you'd like.

用网格展示数据最简单的方式，
就是通过使用 [`GridView.count()`][] 构造方法，
因为它允许我们指定有多少行多少列。

To visualize how `GridView` works,
generate a list of 100 widgets that display their index in the list.

为了帮助我们想象 `GridView` 是如何工作的，
在这个例子中，我们将创建一个包含有 100 个 widget 的 List，
每个 Widget 将展示它在 List 中的索引。

<?code-excerpt "lib/main.dart (GridView)" replace="/^body\: //g"?>
```dart
GridView.count(
  // Create a grid with 2 columns.
  // If you change the scrollDirection to horizontal,
  // this produces 2 rows.
  crossAxisCount: 2,
  // Generate 100 widgets that display their index in the list.
  children: List.generate(100, (index) {
    return Center(
      child: Text(
        'Item $index',
        style: TextTheme.of(context).headlineSmall,
      ),
    );
  }),
),
```

## Interactive example

## 交互式样例

<?code-excerpt "lib/main.dart"?>
```dartpad title="Flutter GridView hands-on example in DartPad" run="true"
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    const title = 'Grid List';

    return MaterialApp(
      title: title,
      home: Scaffold(
        appBar: AppBar(title: const Text(title)),
        body: GridView.count(
          // Create a grid with 2 columns.
          // If you change the scrollDirection to horizontal,
          // this produces 2 rows.
          crossAxisCount: 2,
          // Generate 100 widgets that display their index in the list.
          children: List.generate(100, (index) {
            return Center(
              child: Text(
                'Item $index',
                style: TextTheme.of(context).headlineSmall,
              ),
            );
          }),
        ),
      ),
    );
  }
}
```

<noscript>
  <img src="/assets/images/docs/cookbook/grid-list.webp" alt="Grid List Demo" class="site-mobile-screenshot" />
</noscript>

[`GridView`]: https://api.flutter-io.cn/flutter/widgets/GridView-class.html
[`GridView.count()`]: https://api.flutter-io.cn/flutter/widgets/GridView/GridView.count.html