可折叠

一个带标签的可点击标题，可切换其内容的可见性。

Android

iOS

Web

Included in Expo Go

Recommended version:

~57.0.3

Collapsible 是一个原件，可以通过点击带标签的标题来显示或隐藏其内容。通过 isOpen 和 onOpenChange 控制——每个 Collapsible 管理独立状态。

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

基本可折叠

🌐 Basic collapsible

CollapsibleExample.tsx

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

export default function CollapsibleExample() {
  const [open, setOpen] = useState(false);

  return (
    <Host style={{ flex: 1 }}>
      <Column spacing={8} style={{ padding: 16 }}>
        <Collapsible isOpen={open} onOpenChange={setOpen} label="About">
          <Text>
            A primitive that toggles visibility of its content via a labelled tappable header.
          </Text>
        </Collapsible>
      </Column>
    </Host>
  );
}

手风琴（一次只打开一个部分）

🌐 Accordion (one section open at a time)

将每个 Collapsible 的 isOpen 连接到共享的父级值。组件不强制排他性 — 组合由使用者决定。

🌐 Wire each Collapsible's isOpen to a shared parent value. The component doesn't enforce exclusivity — composition is up to the consumer.

CollapsibleAccordionExample.tsx

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

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

export default function CollapsibleAccordionExample() {
  const [openSection, setOpenSection] = useState<Section>('a');

  return (
    <Host style={{ flex: 1 }}>
      <Column spacing={8} style={{ padding: 16 }}>
        <Collapsible
          isOpen={openSection === 'a'}
          onOpenChange={open => setOpenSection(open ? 'a' : null)}
          label="Section A">
          <Text>Opening B or C closes this one.</Text>
        </Collapsible>
        <Collapsible
          isOpen={openSection === 'b'}
          onOpenChange={open => setOpenSection(open ? 'b' : null)}
          label="Section B">
          <Text>Opening A or C closes this one.</Text>
        </Collapsible>
        <Collapsible
          isOpen={openSection === 'c'}
          onOpenChange={open => setOpenSection(open ? 'c' : null)}
          label="Section C">
          <Text>Opening A or B closes this one.</Text>
        </Collapsible>
      </Column>
    </Host>
  );
}

应用接口

🌐 API

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

Component

`Collapsible`

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`

Optional • Type: ReactNode

Content rendered when isOpen is true.

`isOpen`

Type: boolean

Whether the content is currently expanded.

`label`

Optional • Type: string

Text rendered in the tappable header.

`labelStyle`

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`

Type: (isOpen: boolean) => void

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