LazyRow

用于显示水平滚动列表的 Jetpack Compose LazyRow 组件。

Android

Included in Expo Go

Recommended version:

~57.0.3

一个懒加载的水平列表组件，它只渲染可见的项目，以实现高效滚动。有关更多信息，请参见官方 Jetpack Compose 文档。

🌐 A lazily-loaded horizontal list component that only renders visible items for efficient scrolling. See the official Jetpack Compose documentation for more information.

LazyRow rendering colored category cards in a horizontally scrolling list

安装

🌐 Installation

Terminal

- npx expo install @expo/ui

If you are installing this in an existing React Native app, make sure to install expo in your project.

用法

🌐 Usage

基础懒惰行

🌐 Basic lazy row

BasicLazyRow.tsx

import { Host, LazyRow, Text } from '@expo/ui/jetpack-compose';

const items = Array.from({ length: 100 }, (_, i) => `Item ${i + 1}`);

export default function BasicLazyRow() {
  return (
    <Host style={{ height: 100 }}>
      <LazyRow>
        {items.map(item => (
          <Text key={item}>{item}</Text>
        ))}
      </LazyRow>
    </Host>
  );
}

有安排

🌐 With arrangement

使用 horizontalArrangement 属性来控制列表中项目的间距。传入字符串值如 'spaceBetween' 或对象如 { spacedBy: 8 } 来设置固定的 dp 间距。

🌐 Use the horizontalArrangement prop to control how items are spaced within the list. Pass a string value like 'spaceBetween' or an object like { spacedBy: 8 } for fixed spacing in dp.

LazyRowArrangement.tsx

import { Host, LazyRow, Text } from '@expo/ui/jetpack-compose';

export default function LazyRowArrangement() {
  return (
    <Host style={{ height: 100 }}>
      <LazyRow horizontalArrangement={{ spacedBy: 16 }} verticalAlignment="center">
        <Text>Spaced item 1</Text>
        <Text>Spaced item 2</Text>
        <Text>Spaced item 3</Text>
      </LazyRow>
    </Host>
  );
}

带内容填充

🌐 With content padding

使用 contentPadding 属性在列表内容周围添加以 dp 为单位的内边距。

🌐 Use the contentPadding prop to add padding around the list content in dp.

LazyRowPadding.tsx

import { Host, LazyRow, Text } from '@expo/ui/jetpack-compose';

export default function LazyRowPadding() {
  return (
    <Host style={{ height: 100 }}>
      <LazyRow contentPadding={{ start: 16, top: 8, end: 16, bottom: 8 }}>
        <Text>Padded item 1</Text>
        <Text>Padded item 2</Text>
        <Text>Padded item 3</Text>
      </LazyRow>
    </Host>
  );
}

应用接口

🌐 API

import { LazyRow } from '@expo/ui/jetpack-compose';

Component

`LazyRow`

Type: React.Element<LazyRowProps>

A lazy row component that efficiently displays a horizontally scrolling list.

LazyRowProps

`children`

Optional • Type: ReactNode

The content to display inside the lazy row.

`contentPadding`

Optional • Type: ContentPadding

Content padding in dp.

`horizontalArrangement`

Optional • Literal type: union

The horizontal arrangement of items. Can be a preset string or an object with spacedBy to specify spacing in dp.

Acceptable values are: 'start' | 'end' | 'center' | 'spaceBetween' | 'spaceAround' | 'spaceEvenly' | { spacedBy: number }

`modifiers`

Optional • Type: ModifierConfig[]

Modifiers for the component.

`verticalAlignment`

Optional • Literal type: string

The vertical alignment of items.

Acceptable values are: 'center' | 'top' | 'bottom'