This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 55).

LazyHStack

一个用于惰性水平布局的 SwiftUI LazyHStack 组件。

iOS

tvOS

GitHub

npm

更新日志

Expo UI LazyHStack 与官方 SwiftUI LazyHStack API 保持一致，并水平排列其子项，仅在需要时创建项目（当它们在滚动过程中变为可见时）。

安装

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

基本的懒加载水平堆栈

LazyHStack 应该放在带有 axes="horizontal" 的 ScrollView 内，以启用懒加载渲染。

BasicLazyHStackExample.tsx

import { Host, ScrollView, LazyHStack, Text } from '@expo/ui/swift-ui';

export default function BasicLazyHStackExample() {
  return (
    <Host style={{ flex: 1 }}>
      <ScrollView axes="horizontal">
        <LazyHStack spacing={12}>
          {Array.from({ length: 100 }, (_, i) => (
            <Text key={i}>{`项目 ${i}`}</Text>
          ))}
        </LazyHStack>
      </ScrollView>
    </Host>
  );
}

带对齐方式

alignment 属性控制子项的垂直对齐方式。可用选项有：top、center、bottom、firstTextBaseline 和 lastTextBaseline。

LazyHStackAlignmentExample.tsx

import { Host, ScrollView, LazyHStack, Rectangle } from '@expo/ui/swift-ui';
import { frame } from '@expo/ui/swift-ui/modifiers';

export default function LazyHStackAlignmentExample() {
  return (
    <Host style={{ flex: 1 }}>
      <ScrollView axes="horizontal">
        <LazyHStack spacing={12} alignment="top">
          <Rectangle modifiers={[frame({ width: 50, height: 50 })]} />
          <Rectangle modifiers={[frame({ width: 50, height: 100 })]} />
          <Rectangle modifiers={[frame({ width: 50, height: 75 })]} />
        </LazyHStack>
      </ScrollView>
    </Host>
  );
}

API

import { LazyHStack } from '@expo/ui/swift-ui';

Component

`LazyHStack`

iOS

tvOS

Type: React.Element<LazyHStackProps>

LazyHStackProps

`alignment`

iOS

tvOS

Optional • Literal type: string

The vertical alignment of children within the stack.

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

`children`

iOS

tvOS

Type: React.ReactNode

`spacing`

iOS

tvOS

Optional • Type: number

The spacing between children.

Inherited Props

CommonViewModifierProps