分区

一个用于在列表和表单中对内容进行分组的 SwiftUI Section 组件。

iOS

tvOS

Included in Expo Go

GitHub

npm

更新日志

Recommended version:

~56.0.26

Expo UI 的 Section 与官方 SwiftUI Section API 保持一致，用于在 List、Form 或 Picker 组件中对相关内容进行分组。

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

带标题的基础 Section

对简单的、带文本标题的 Section 使用 title 属性。

BasicSectionExample.tsx

import { Host, List, Section, Text } from '@expo/ui/swift-ui';

export default function BasicSectionExample() {
  return (
    <Host style={{ flex: 1 }}>
      <List>
        <Section title="设置">
          <Text>常规</Text>
          <Text>隐私</Text>
          <Text>通知</Text>
        </Section>
      </List>
    </Host>
  );
}

带自定义页眉和页脚的 Section

对自定义视图使用 header 和 footer 属性。只有在未提供 title 时才会使用这些属性。

CustomHeaderFooterExample.tsx

import { Host, List, Section, Toggle, Text, HStack, Image } from '@expo/ui/swift-ui';
import { useState } from 'react';

export default function CustomHeaderFooterExample() {
  const [locationEnabled, setLocationEnabled] = useState(false);

  return (
    <Host style={{ flex: 1 }}>
      <List>
        <Section
          header={
            <HStack>
              <Image systemName="location.fill" color="blue" size={16} />
              <Text>位置服务</Text>
            </HStack>
          }
          footer={
            <Text>
              启用位置服务可让应用提供个性化推荐。
            </Text>
          }>
          <Toggle
            label="启用位置"
            isOn={locationEnabled}
            onIsOnChange={setLocationEnabled}
          />
        </Section>
      </List>
    </Host>
  );
}

可折叠 Section

使用 isExpanded 属性来控制 Section 是展开还是折叠。提供该属性后，Section 就会变成可折叠的。使用 onIsExpandedChange 处理状态变化。

注意：可折叠 Section 需要 iOS 17+ 和 tvOS 17+，且列表必须使用 sidebar 样式。可折叠 Section 不支持 footer。

CollapsibleSectionExample.tsx

import { useState } from 'react';
import { Host, List, Section, Text } from '@expo/ui/swift-ui';
import { listStyle } from '@expo/ui/swift-ui/modifiers';

export default function CollapsibleSectionExample() {
  const [favoritesExpanded, setFavoritesExpanded] = useState(false);
  const [recentsExpanded, setRecentsExpanded] = useState(false);

  return (
    <Host style={{ flex: 1 }}>
      <List modifiers={[listStyle('sidebar')]}>
        <Section
          title="收藏"
          isExpanded={favoritesExpanded}
          onIsExpandedChange={setFavoritesExpanded}>
          <Text>主页</Text>
          <Text>工作</Text>
          <Text>健身房</Text>
        </Section>
        <Section
          title="最近"
          isExpanded={recentsExpanded}
          onIsExpandedChange={setRecentsExpanded}>
          <Text>咖啡店</Text>
          <Text>图书馆</Text>
          <Text>公园</Text>
        </Section>
      </List>
    </Host>
  );
}

Form 中的多个 Section

Section 可用于 Form 组件中，将表单控件组织为逻辑分组。

FormSectionsExample.tsx

import { useState } from 'react';
import { Host, Form, Section, Toggle, Picker, Text, Button } from '@expo/ui/swift-ui';
import { pickerStyle, tag } from '@expo/ui/swift-ui/modifiers';

export default function FormSectionsExample() {
  const [darkMode, setDarkMode] = useState(false);
  const [notifications, setNotifications] = useState(true);
  const [language, setLanguage] = useState(0);
  const languages = ['英语', '西班牙语', '法语', '德语'];

  return (
    <Host style={{ flex: 1 }}>
      <Form>
        <Section title="外观">
          <Toggle label="深色模式" isOn={darkMode} onIsOnChange={setDarkMode} />
          <Picker
            label="语言"
            selection={language}
            onSelectionChange={setLanguage}
            modifiers={[pickerStyle('menu')]}>
            {languages.map((lang, index) => (
              <Text key={index} modifiers={[tag(index)]}>
                {lang}
              </Text>
            ))}
          </Picker>
        </Section>
        <Section title="通知">
          <Toggle label="推送通知" isOn={notifications} onIsOnChange={setNotifications} />
        </Section>
        <Section title="账户">
          <Button label="退出登录" role="destructive" onPress={() => alert('已退出登录')} />
        </Section>
      </Form>
    </Host>
  );
}

API

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

Component

`Section`

iOS

tvOS

Type: React.Element<SectionProps>

Section component uses the native Section component.

SectionProps

`children`

iOS

tvOS

Type: React.ReactNode

The content of the section.

`footer`

iOS

tvOS

Optional • Type: React.ReactNode

Sets a custom footer for the section.

`header`

iOS

tvOS

Optional • Type: React.ReactNode

Sets a custom header for the section.

`isExpanded`

iOS 17.0+

tvOS 17.0+

Optional • Type: boolean

Controls whether the section is expanded or collapsed. When provided, the section becomes collapsible.

Note: Available only when the list style is set to sidebar.

`onIsExpandedChange`

iOS 17.0+

tvOS 17.0+

Optional • Type: (isExpanded: boolean) => void

Callback triggered when the section's expanded state changes.

`title`

iOS

tvOS

Optional • Type: string

The title of the section.

Inherited props

CommonViewModifierProps