This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 57).

可折叠

一个带标签的可点击标题，用于切换其内容的可见性。

Android

iOS

Web

Included in Expo Go

GitHub

npm

更新日志

Collapsible 是一个原语，通过点击带标签的标题来显示或隐藏其内容。可通过 isOpen 和 onOpenChange 进行控制——每个 Collapsible 都管理彼此独立的状态。

安装

Terminal

- npx expo install @expo/ui

- yarn expo install @expo/ui

- pnpm expo install @expo/ui

- bun 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

基本折叠组件

CollapsibleExample.tsx

import { useState } from 'react';
import { useColorScheme } from 'react-native';
import { Host, Column, Collapsible, Text } from '@expo/ui';

export default function CollapsibleExample() {
  const [open, setOpen] = useState(false);
  const colorScheme = useColorScheme();
  const ink = { color: colorScheme === 'dark' ? '#FFFFFF' : '#000000' };

  return (
    <Host matchContents={{ vertical: true }} style={{ width: '100%' }}>
      <Column spacing={8} style={{ padding: 16 }}>
        <Collapsible isOpen={open} onOpenChange={setOpen} label="About">
          <Text textStyle={ink}>
            A primitive that toggles visibility of its content via a labelled tappable header.
          </Text>
        </Collapsible>
      </Column>
    </Host>
  );
}

手风琴（一次展开一个部分）

将每个 Collapsible 的 isOpen 绑定到一个共享的父级值。该组件不会强制互斥——如何组合由使用者决定。

CollapsibleAccordionExample.tsx

import { useState } from 'react';
import { useColorScheme } from 'react-native';
import { Host, Column, Collapsible, Text } from '@expo/ui';

type Section = 'a' | 'b' | 'c' | null;

export default function CollapsibleAccordionExample() {
  const [openSection, setOpenSection] = useState<Section>('a');
  const colorScheme = useColorScheme();
  const ink = { color: colorScheme === 'dark' ? '#FFFFFF' : '#000000' };

  return (
    <Host matchContents={{ vertical: true }} style={{ width: '100%' }}>
      <Column spacing={8} style={{ padding: 16 }}>
        <Collapsible
          isOpen={openSection === 'a'}
          onOpenChange={open => setOpenSection(open ? 'a' : null)}
          label="Section A">
          <Text textStyle={ink}>打开 B 或 C 会关闭此部分。</Text>
        </Collapsible>
        <Collapsible
          isOpen={openSection === 'b'}
          onOpenChange={open => setOpenSection(open ? 'b' : null)}
          label="Section B">
          <Text textStyle={ink}>打开 A 或 C 会关闭此部分。</Text>
        </Collapsible>
        <Collapsible
          isOpen={openSection === 'c'}
          onOpenChange={open => setOpenSection(open ? 'c' : null)}
          label="Section C">
          <Text textStyle={ink}>打开 A 或 B 会关闭此部分。</Text>
        </Collapsible>
      </Column>
    </Host>
  );
}

API

import { Collapsible } from '@expo/ui';

Component

`Collapsible`

Android

iOS

Web

Type: React.Element<CollapsibleProps>

A primitive that toggles visibility of its content via a labelled tappable header. Controlled via isOpen + onOpenChange.

Props for the Collapsible component, a primitive that shows or hides its content with a tap on a labelled header.

CollapsibleProps

`children`

Android

iOS

Web

Optional • Type: ReactNode

Content rendered when isOpen is true.

`isOpen`

Android

iOS

Web

Type: boolean

Whether the content is currently expanded.

`label`

Android

iOS

Web

Optional • Type: string

Text rendered in the tappable header.

`labelStyle`

Android

iOS

Web

Optional • Type:

{
  color: string, 
  fontFamily: string, 
  fontSize: number, 
  fontWeight: 'normal' | 'bold' | '100' | '200' | '300' | '400' | '500' | '600' | '700' | '800' | '900', 
  letterSpacing: number, 
  lineHeight: number, 
  textAlign: 'center' | 'left' | 'right'
}

Text-specific styling for the tappable header label.

`onOpenChange`

Android

iOS

Web

Type: (isOpen: boolean) => void

Called when the user taps the header to toggle the open state.