This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 57).

滑块

用于从连续或分段范围中选择值的控件。

Android

iOS

Web

Included in Expo Go

GitHub

npm

更新日志

用于在范围内选择数值的受控滑块。将 value 与 onValueChange 配对，以从 React 管理状态。

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

连续滑块

默认范围是 [0, 1]。

ContinuousSliderExample.tsx

import { useState } from 'react';
import { Host, Slider } from '@expo/ui';

export default function ContinuousSliderExample() {
  const [value, setValue] = useState(0.5);

  return (
    <Host style={{ flex: 1 }}>
      <Slider value={value} onValueChange={setValue} />
    </Host>
  );
}

带自定义范围的分段滑块

使用 min、max 和 step 来约束滑块生成的值。

SteppedSliderExample.tsx

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

export default function SteppedSliderExample() {
  const [volume, setVolume] = useState(50);

  return (
    <Host style={{ flex: 1 }}>
      <Column spacing={8}>
        <Text>音量：{volume}</Text>
        <Slider value={volume} onValueChange={setVolume} min={0} max={100} step={10} />
      </Column>
    </Host>
  );
}

API

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

Component

`Slider`

Android

iOS

Web

Type: React.Element<SliderProps>

A control for selecting a value from a continuous or stepped range.

Props for the Slider component.

SliderProps

`disabled`

Android

iOS

Web

Optional • Type: boolean

Whether the slider is disabled. Disabled sliders do not respond to user interaction.

`max`

Android

iOS

Web

Optional • Type: number • Default: 1

Maximum value of the slider range.

`min`

Android

iOS

Web

Optional • Type: number • Default: 0

Minimum value of the slider range.

`modifiers`

Android

iOS

Web

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.

`onValueChange`

Android

iOS

Web

Type: (value: number) => void

Called when the user changes the slider value.

`step`

Android

iOS

Web

Optional • Type: number

Increment size. For example, step={10} with min={0} and max={100} produces values 0, 10, 20, …, 100.

`testID`

Android

iOS

Web

Optional • Type: string

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

`value`

Android

iOS

Web

Type: number

Current value of the slider.