This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 56).

按钮

一个可按压的按钮，具有多种视觉变体。

Android

iOS

Web

Included in Expo Go

GitHub

npm

更新日志

一个可点击按钮，可在 Android、iOS 和 Web 上一致渲染。支持 filled、outlined 和 text 三种视觉变体。

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

基础按钮

BasicButtonExample.tsx

import { Host, Button } from '@expo/ui';

export default function BasicButtonExample() {
  return (
    <Host matchContents>
      <Button label="点我" onPress={() => alert('已点击！')} />
    </Host>
  );
}

变体

使用 variant 属性选择视觉变体。

ButtonVariantsExample.tsx

import { Host, Column, Button } from '@expo/ui';

export default function ButtonVariantsExample() {
  return (
    <Host matchContents>
      <Column spacing={8}>
        <Button variant="filled" label="填充" onPress={() => {}} />
        <Button variant="outlined" label="轮廓" onPress={() => {}} />
        <Button variant="text" label="文本" onPress={() => {}} />
      </Column>
    </Host>
  );
}

自定义内容

传入 children 以完全自定义按钮内容。提供 children 时，会忽略 label 属性。

CustomButtonExample.tsx

import { Host, Button, Row, Icon, Text } from '@expo/ui';

export default function CustomButtonExample() {
  return (
    <Host matchContents>
      <Button onPress={() => {}}>
        <Row spacing={6} alignment="center">
          <Icon
            name={Icon.select({
              ios: 'star.fill',
              android: require('@expo/material-symbols/star.xml'),
            })}
            size={16}
            color="#FFFFFF"
          />
          <Text textStyle={{ color: '#FFFFFF' }}>收藏</Text>
        </Row>
      </Button>
    </Host>
  );
}

禁用

DisabledButtonExample.tsx

import { Host, Button } from '@expo/ui';

export default function DisabledButtonExample() {
  return (
    <Host matchContents>
      <Button label="已禁用" onPress={() => {}} disabled />
    </Host>
  );
}

API

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

Component

`Button`

Android

iOS

Web

Type: React.Element<ButtonProps>

A pressable button that supports multiple visual variants.

Props for the Button component.

ButtonProps

`children`

Android

iOS

Web

Optional • Type: ReactNode

Custom content rendered inside the button. When provided, label is ignored.

`disabled`

Android

iOS

Web

Optional • Type: boolean

Whether the component is disabled. Disabled components do not respond to user interaction.

`hidden`

Android

iOS

Web

Optional • Type: boolean

Whether the component is hidden.

`label`

Android

iOS

Web

Optional • Type: string

Text label displayed inside the button. Ignored when children is provided.

`modifiers`

Android

iOS

Optional • Type: ModifierConfig[]

Platform-specific modifier escape hatch. Pass an array of modifier configs from @expo/ui/swift-ui/modifiers or @expo/ui/jetpack-compose/modifiers.

`onAppear`

Android

iOS

Web

Optional • Type: () => void

Called when the component appears on screen.

`onDisappear`

Android

iOS

Web

Optional • Type: () => void

Called when the component is removed from screen.

`onPress`

Android

iOS

Web

Optional • Type: () => void

Called when the button is pressed.

`style`

Android

iOS

Web

Optional • Type:

Pick<ViewStyle, 'padding' | 'paddingHorizontal' | 'paddingVertical' | 'paddingTop' | 'paddingBottom' | 'paddingLeft' | 'paddingRight' | 'backgroundColor' | 'borderRadius' | 'borderWidth' | 'borderColor' | 'opacity' | 'width' | 'height'>

Platform-agnostic style properties. These are translated to SwiftUI modifiers on iOS and Jetpack Compose modifiers on Android.

`testID`

Android

iOS

Web

Optional • Type: string

Identifier used to locate the component in end-to-end tests.

`variant`

Android

iOS

Web

Optional • Type: ButtonVariant • Default: 'filled'

Visual variant of the button.

Types

`ButtonVariant`

Android

iOS

Web

Literal Type: string

Visual variant of a Button.

'filled' — solid background color (default).
'outlined' — transparent background with a border.
'text' — no background or border, text only.

Acceptable values are: 'filled' | 'outlined' | 'text'