Reference version

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按钮

一个用于显示原生按钮的 SwiftUI Button 组件。

iOS
tvOS
Included in Expo Go
Recommended version:
~57.0.18

Expo UI Button 与官方 SwiftUI Button API 保持一致,并支持通过 buttonStyle、controlSize 以及其他修饰器进行样式设置。

两个 iOS 26 Liquid Glass 按钮 — 上方一个 glassProminent 开始使用,下面一个 glass 了解更多两个 iOS 26 Liquid Glass 按钮 — 上方一个 glassProminent 开始使用,下面一个 glass 了解更多

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

基础按钮

BasicButtonExample.tsx
import { Host, Button } from '@expo/ui/swift-ui'; export default function BasicButtonExample() { return ( <Host style={{ flex: 1 }}> <Button label="Press me" onPress={() => alert('Pressed!')} /> </Host> ); }

带系统图像的按钮

ButtonWithImageExample.tsx
import { Host, Button } from '@expo/ui/swift-ui'; export default function ButtonWithImageExample() { return ( <Host style={{ flex: 1 }}> <Button label="下载" systemImage="arrow.down.circle" onPress={() => alert('正在下载...')} /> </Host> ); }

仅图标按钮

使用 labelStyle 修饰符仅显示图标,同时保留标签以供辅助功能使用。

IconOnlyButtonExample.tsx
import { Host, Button } from '@expo/ui/swift-ui'; import { labelStyle } from '@expo/ui/swift-ui/modifiers'; export default function IconOnlyButtonExample() { return ( <Host style={{ flex: 1 }}> <Button label="设置" systemImage="gear" modifiers={[labelStyle('iconOnly')]} onPress={() => alert('设置')} /> </Host> ); }

按钮样式

使用 buttonStyle 修饰符来更改按钮外观。可用样式包括:bordered、borderedProminent、borderless、plain、glass 和 glassProminent。

ButtonStylesExample.tsx
import { Host, Button, VStack } from '@expo/ui/swift-ui'; import { buttonStyle } from '@expo/ui/swift-ui/modifiers'; export default function ButtonStylesExample() { return ( <Host style={{ flex: 1 }}> <VStack spacing={8}> <Button label="Bordered" modifiers={[buttonStyle('bordered')]} /> <Button label="Bordered Prominent" modifiers={[buttonStyle('borderedProminent')]} /> <Button label="Borderless" modifiers={[buttonStyle('borderless')]} /> <Button label="Plain" modifiers={[buttonStyle('plain')]} /> </VStack> </Host> ); }

按钮边框形状

使用 buttonBorderShape 修饰符来更改样式化按钮的形状。可用形状包括:automatic、capsule、roundedRectangle 和 circle(iOS 17+)。

ButtonBorderShapeExample.tsx
import { Host, Button } from '@expo/ui/swift-ui'; import { buttonStyle, controlSize, buttonBorderShape, labelStyle, } from '@expo/ui/swift-ui/modifiers'; export default function ButtonBorderShapeExample() { return ( <Host style={{ flex: 1 }}> <Button label="收藏" systemImage="heart.fill" modifiers={[ buttonStyle('glass'), controlSize('extraLarge'), labelStyle('iconOnly'), buttonBorderShape('circle'), ]} onPress={() => alert('已收藏')} /> </Host> ); }

控件尺寸

使用 controlSize 修饰符来调整按钮大小。可用尺寸包括:mini、small、regular、large 和 extraLarge。

ControlSizeExample.tsx
import { Host, Button, VStack } from '@expo/ui/swift-ui'; import { buttonStyle, controlSize, } from '@expo/ui/swift-ui/modifiers'; export default function ControlSizeExample() { return ( <Host style={{ flex: 1 }}> <VStack spacing={8}> <Button label="Mini" modifiers={[controlSize('mini'), buttonStyle('bordered')]} /> <Button label="Small" modifiers={[ controlSize('small'), buttonStyle('bordered'), ]} /> <Button label="Regular" modifiers={[ controlSize('regular'), buttonStyle('bordered'), ]} /> <Button label="Large" modifiers={[ controlSize('large'), buttonStyle('bordered'), ]} /> </VStack> </Host> ); }

按钮角色

使用 role 属性来指示按钮的语义角色。可用角色包括:default、cancel 和 destructive。

ButtonRolesExample.tsx
import { Host, Button, VStack } from '@expo/ui/swift-ui'; export default function ButtonRolesExample() { return ( <Host style={{ flex: 1 }}> <VStack spacing={8}> <Button label="默认" role="default" /> <Button label="取消" role="cancel" /> <Button label="删除" role="destructive" /> </VStack> </Host> ); }

着色按钮

使用 tint 修饰符来更改按钮颜色。

TintedButtonExample.tsx
import { Host, Button } from '@expo/ui/swift-ui'; import { tint } from '@expo/ui/swift-ui/modifiers'; export default function TintedButtonExample() { return ( <Host style={{ flex: 1 }}> <Button label="Custom Color" modifiers={[tint('#FF6347')]} /> </Host> ); }

禁用按钮

使用 disabled 修饰符来禁用按钮。

DisabledButtonExample.tsx
import { Host, Button } from '@expo/ui/swift-ui'; import { disabled } from '@expo/ui/swift-ui/modifiers'; export default function DisabledButtonExample() { return ( <Host style={{ flex: 1 }}> <Button label="Disabled" modifiers={[disabled()]} /> </Host> ); }

自定义标签内容

你可以将自定义组件作为 children 传入,以实现更复杂的按钮标签内容。

CustomContentExample.tsx
import { Host, Button, VStack, Image, Text, } from '@expo/ui/swift-ui'; export default function CustomContentExample() { return ( <Host style={{ flex: 1 }}> <Button onPress={() => console.log('Pressed!')}> <VStack spacing={4}> <Image systemName="folder" /> <Text>文件夹</Text> </VStack> </Button> </Host> ); }

API

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

Component

Button

iOS
tvOS

Type: React.Element<ButtonProps>

Displays a native button component.

Example

import { Button } from '@expo/ui/swift-ui'; import { buttonStyle, controlSize, tint, disabled } from '@expo/ui/swift-ui/modifiers'; <Button role="destructive" onPress={handlePress} label="Delete" modifiers={[ buttonStyle('bordered'), controlSize('large'), tint('#FF0000'), disabled(true) ]} />

ButtonProps

children

iOS
tvOS
Optional • Literal type: union

Custom content for the button label. Use this for custom label views. Only nested elements are supported, not plain strings.

Acceptable values are: ReactElement<unknown, string | JSXElementConstructor<any>> | ReactElement[]

label

iOS
tvOS
Optional • Type: string

The text label for the button. Use this for simple text buttons.

onPress

iOS
tvOS
Optional • Type: () => void

A callback that is called when the button is pressed.

role

iOS
tvOS
Optional • Type: ButtonRole

Indicates the role of the button.

systemImage

iOS
tvOS
Optional • Type: SFSymbols7_0

A string describing the system image to display in the button. Only used when label is provided.

target

iOS
tvOS
Optional • Type: string

Target identifier for the button, used for identifying which button was pressed in widgets and live activities.

Types

ButtonRole

iOS
tvOS

Literal type: string

The role of the button.

  • default - The default button role.
  • cancel - A button that cancels the current operation.
  • destructive - A button that deletes data or performs a destructive action.

Acceptable values are: 'default' | 'cancel' | 'destructive'