开关

用于切换控件的 Jetpack Compose 开关组件。

Android

Included in Expo Go

Recommended version:

~57.0.3

信息有关跨平台使用，请参阅通用 Switch —— 它会根据平台呈现相应的原生组件。

Expo UI Switch 与官方 Jetpack Compose Switch API 相匹配。

🌐 Expo UI Switch matches the official Jetpack Compose Switch API.

Two Material 3 switches showing on and off states

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

切换开关

🌐 Toggle switch

ToggleSwitchExample.tsx

import { useState } from 'react';
import { Host, Switch } from '@expo/ui/jetpack-compose';

export default function ToggleSwitchExample() {
  const [checked, setChecked] = useState(false);

  return (
    <Host matchContents>
      <Switch value={checked} onCheckedChange={setChecked} />
    </Host>
  );
}

自定义颜色

🌐 Custom colors

CustomColorsExample.tsx

import { useState } from 'react';
import { Host, Switch } from '@expo/ui/jetpack-compose';

export default function CustomColorsExample() {
  const [checked, setChecked] = useState(false);

  return (
    <Host matchContents>
      <Switch
        value={checked}
        onCheckedChange={setChecked}
        colors={{
          checkedThumbColor: '#6200EE',
          checkedTrackColor: '#EDE9FE',
          uncheckedThumbColor: '#9CA3AF',
          uncheckedTrackColor: '#F3F4F6',
          uncheckedBorderColor: '#D1D5DB',
        }}
      />
    </Host>
  );
}

自定义缩略图内容

🌐 Custom thumb content

使用 Switch.ThumbContent 在滑块按钮内渲染自定义元素。Switch.DefaultIconSize 提供 M3 默认图标大小，以便你的内容完美适配。

🌐 Use Switch.ThumbContent to render a custom element inside the thumb. Switch.DefaultIconSize gives you the M3 default icon size so your content fits perfectly.

ThumbContentExample.tsx

import { useState } from 'react';
import { Host, Switch, Box } from '@expo/ui/jetpack-compose';
import { size, clip, background, Shapes } from '@expo/ui/jetpack-compose/modifiers';

export default function ThumbContentExample() {
  const [checked, setChecked] = useState(false);

  return (
    <Host matchContents>
      <Switch
        value={checked}
        onCheckedChange={setChecked}
        colors={{
          checkedThumbColor: '#7C3AED',
          checkedTrackColor: '#EDE9FE',
          checkedIconColor: '#7C3AED',
          uncheckedThumbColor: '#9CA3AF',
          uncheckedTrackColor: '#F3F4F6',
          uncheckedBorderColor: '#D1D5DB',
          uncheckedIconColor: '#9CA3AF',
        }}>
        <Switch.ThumbContent>
          <Box
            modifiers={[
              size(Switch.DefaultIconSize, Switch.DefaultIconSize),
              clip(Shapes.Circle),
              background(checked ? '#FFFFFF' : '#E5E7EB'),
            ]}
          />
        </Switch.ThumbContent>
      </Switch>
    </Host>
  );
}

应用接口

🌐 API

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

Components

`Switch`

Type: React.Element<SwitchProps>

A switch component.

SwitchProps

`children`

Only for:

Android

Optional • Type: ReactNode

Children containing ThumbContent slot.

`colors`

Optional • Type: SwitchColors

Colors for switch core elements.

`enabled`

Optional • Type: boolean • Default: true

Whether the switch is enabled.

`modifiers`

Optional • Type: ModifierConfig[]

Modifiers for the component.

`onCheckedChange`

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

Callback function that is called when the checked state changes.

`value`

Type: boolean

Indicates whether the switch is checked.

`SwitchThumbContent`

Only for:

Android

Type: React.Element<ThumbContentProps>

Custom content to be displayed inside the switch thumb.

Types

`SwitchColors`

Colors for switch core elements.

Property	Type	Description
checkedBorderColor(optional)	`ColorValue`	-
checkedIconColor(optional)	`ColorValue`	-
checkedThumbColor(optional)	`ColorValue`	-
checkedTrackColor(optional)	`ColorValue`	-
disabledCheckedBorderColor(optional)	`ColorValue`	-
disabledCheckedIconColor(optional)	`ColorValue`	-
disabledCheckedThumbColor(optional)	`ColorValue`	-
disabledCheckedTrackColor(optional)	`ColorValue`	-
disabledUncheckedBorderColor(optional)	`ColorValue`	-
disabledUncheckedIconColor(optional)	`ColorValue`	-
disabledUncheckedThumbColor(optional)	`ColorValue`	-
disabledUncheckedTrackColor(optional)	`ColorValue`	-
uncheckedBorderColor(optional)	`ColorValue`	-
uncheckedIconColor(optional)	`ColorValue`	-
uncheckedThumbColor(optional)	`ColorValue`	-
uncheckedTrackColor(optional)	`ColorValue`	-