This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 55).

滑块

一个用于从范围中选择值的 Jetpack Compose 滑块组件。

Android

GitHub

npm

更新日志

Expo UI Slider 与官方的 Jetpack Compose Slider API 保持一致，并允许从有界范围中选择数值。

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

基础滑块

BasicSliderExample.tsx

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

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

  return (
    <Host matchContents>
      <Slider value={value} onValueChange={setValue} />
    </Host>
  );
}

带自定义范围的滑块

使用 min 和 max 属性来定义滑块的数值范围。

CustomRangeSliderExample.tsx

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

export default function CustomRangeSliderExample() {
  const [value, setValue] = useState(50);

  return (
    <Host matchContents>
      <Slider value={value} min={0} max={100} onValueChange={setValue} />
    </Host>
  );
}

带步进的滑块

使用 steps 属性来定义离散增量。将 steps 设为 0 可表示连续值。

SteppedSliderExample.tsx

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

export default function SteppedSliderExample() {
  const [value, setValue] = useState(0);

  return (
    <Host matchContents>
      <Slider value={value} min={0} max={100} steps={10} onValueChange={setValue} />
    </Host>
  );
}

自定义颜色

使用 colors 属性覆盖滑块拇指、轨道和刻度标记的默认 Material3 颜色。

CustomColorsSliderExample.tsx

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

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

  return (
    <Host matchContents>
      <Slider
        value={value}
        colors={{
          thumbColor: '#6200EE',
          activeTrackColor: '#6200EE',
          inactiveTrackColor: '#E0E0E0',
        }}
        onValueChange={setValue}
      />
    </Host>
  );
}

自定义拇指和轨道

同时使用 Slider.Thumb 和 Slider.Track 插槽即可实现完全自定义的滑块外观。

FullyCustomSliderExample.tsx

import { useState } from 'react';
import { Host, Slider, Shape, Row, Box } from '@expo/ui/jetpack-compose';
import {
  fillMaxWidth,
  height,
  weight,
  size,
  clip,
  background,
  Shapes,
} from '@expo/ui/jetpack-compose/modifiers';

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

  return (
    <Host matchContents>
      <Slider value={value} onValueChange={setValue}>
        <Slider.Thumb>
          <Box modifiers={[size(24, 24), clip(Shapes.Circle), background('#6200EE')]} />
        </Slider.Thumb>
        <Slider.Track>
          <Row modifiers={[fillMaxWidth(), height(8)]}>
            <Shape.RoundedCorner
              color="#6200EE"
              cornerRadii={{ topStart: 4, bottomStart: 4 }}
              modifiers={[weight(Math.max(value, 0.01)), height(8)]}
            />
            <Shape.RoundedCorner
              color="#BDBDBD"
              cornerRadii={{ topEnd: 4, bottomEnd: 4 }}
              modifiers={[weight(Math.max(1 - value, 0.01)), height(8)]}
            />
          </Row>
        </Slider.Track>
      </Slider>
    </Host>
  );
}

API

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

Component

`Slider`

Android

Type: React.Element<SliderProps>

A slider component that wraps Material3's Slider.

SliderProps

`children`

Android

Optional • Type: React.ReactNode

Slot children for custom thumb and track.

`colors`

Android

Optional • Type: SliderColors

Colors for slider elements. Maps to Material3's SliderDefaults.colors().

`enabled`

Android

Optional • Type: boolean • Default: true

Whether the slider is enabled for user interaction.

`max`

Android

Optional • Type: number • Default: 1

The maximum value of the slider. Updating this value does not trigger callbacks if the current value is above max.

`min`

Android

Optional • Type: number • Default: 0

The minimum value of the slider. Updating this value does not trigger callbacks if the current value is below min.

`modifiers`

Android

Optional • Type: ModifierConfig[]

Modifiers for the component.

`onValueChange`

Android

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

Callback triggered on dragging along the slider.

`onValueChangeFinished`

Android

Optional • Type: () => void

Callback triggered when the user finishes changing the value (for example, lifts a finger). Maps to Material3's onValueChangeFinished.

`steps`

Android

Optional • Type: number • Default: 0

The number of steps between the minimum and maximum values, 0 signifies infinite steps.

`value`

Android

Optional • Type: number • Default: 0

The current value of the slider.

Types

`SliderColors`

Android

Colors for slider elements. Maps directly to Material3's SliderDefaults.colors().

Property	Type	Description
activeTickColor(optional)	`ColorValue`	-
activeTrackColor(optional)	`ColorValue`	-
inactiveTickColor(optional)	`ColorValue`	-
inactiveTrackColor(optional)	`ColorValue`	-
thumbColor(optional)	`ColorValue`	-