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

复选框

一个用于选择控件的 Jetpack Compose 复选框组件。

Android

GitHub

npm

更新日志

Expo UI Checkbox 与官方 Jetpack Compose Checkbox API 保持一致。

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

基础复选框

CheckboxExample.tsx

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

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

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

自定义颜色

CustomColorsExample.tsx

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

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

  return (
    <Host matchContents>
      <Checkbox
        value={checked}
        onCheckedChange={setChecked}
        colors={{
          checkedColor: '#6200EE',
          checkmarkColor: '#FFFFFF',
        }}
      />
    </Host>
  );
}

全选（TriStateCheckbox）

当父复选框需要反映其子项的状态时，请使用 TriStateCheckbox。它支持三种状态：'on'、'off' 和 'indeterminate'。

将 toggleable 修饰符应用到每个 Row，使整行（复选框 + 标签）都可点击，并具备正确的可访问性语义。在行上使用 toggleable 时，请从复选框本身省略 onCheckedChange/onClick，以避免重复处理。

SelectAllExample.tsx

import { useState } from 'react';
import { Host, Checkbox, TriStateCheckbox, Row, Column, Text } from '@expo/ui/jetpack-compose';
import { toggleable } from '@expo/ui/jetpack-compose/modifiers';

export default function SelectAllExample() {
  const [child1, setChild1] = useState(false);
  const [child2, setChild2] = useState(false);
  const [child3, setChild3] = useState(false);

  const parentState =
    child1 && child2 && child3 ? 'on' : !child1 && !child2 && !child3 ? 'off' : 'indeterminate';

  return (
    <Host matchContents>
      <Column>
        <Row
          verticalAlignment="center"
          modifiers={[
            toggleable(
              parentState === 'on',
              () => {
                const newState = parentState !== 'on';
                setChild1(newState);
                setChild2(newState);
                setChild3(newState);
              },
              { role: 'checkbox' }
            ),
          ]}>
          <TriStateCheckbox state={parentState} />
          <Text>全选</Text>
        </Row>
        <Row
          verticalAlignment="center"
          modifiers={[toggleable(child1, () => setChild1(!child1), { role: 'checkbox' })]}>
          <Checkbox value={child1} />
          <Text>选项 1</Text>
        </Row>
        <Row
          verticalAlignment="center"
          modifiers={[toggleable(child2, () => setChild2(!child2), { role: 'checkbox' })]}>
          <Checkbox value={child2} />
          <Text>选项 2</Text>
        </Row>
        <Row
          verticalAlignment="center"
          modifiers={[toggleable(child3, () => setChild3(!child3), { role: 'checkbox' })]}>
          <Checkbox value={child3} />
          <Text>选项 3</Text>
        </Row>
      </Column>
    </Host>
  );
}

API

import { Checkbox, TriStateCheckbox } from '@expo/ui/jetpack-compose';

Components

`Checkbox`

Android

Type: React.Element<CheckboxProps>

A checkbox component.

CheckboxProps

`colors`

Android

Optional • Type: CheckboxColors

Colors for checkbox core elements.

`enabled`

Android

Optional • Type: boolean • Default: true

Whether the checkbox is enabled.

`modifiers`

Android

Optional • Type: ModifierConfig[]

Modifiers for the component.

`onCheckedChange`

Android

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

Callback function that is called when the checked state changes.

`value`

Android

Type: boolean

Indicates whether the checkbox is checked.

`TriStateCheckbox`

Android

Type: React.Element<TriStateCheckboxProps>

A tri-state checkbox component that supports 'on', 'off', and 'indeterminate' states. Useful for "select all" patterns where the parent checkbox reflects the state of its children.

TriStateCheckboxProps

`colors`

Android

Optional • Type: CheckboxColors

Colors for checkbox core elements.

`enabled`

Android

Optional • Type: boolean • Default: true

Whether the checkbox is enabled.

`modifiers`

Android

Optional • Type: ModifierConfig[]

Modifiers for the component.

`onClick`

Android

Optional • Type: () => void

Callback function that is called when the checkbox is clicked.

`state`

Android

Type: ToggleableState

The toggleable state of the checkbox: 'on', 'off', or 'indeterminate'.

Types

`CheckboxColors`

Android

Colors for checkbox core elements.

Property	Type	Description
checkedColor(optional)	`ColorValue`	-
checkmarkColor(optional)	`ColorValue`	-
disabledCheckedColor(optional)	`ColorValue`	-
disabledIndeterminateColor(optional)	`ColorValue`	-
disabledUncheckedColor(optional)	`ColorValue`	-
uncheckedColor(optional)	`ColorValue`	-

`ToggleableState`

Android

Literal Type: string

The toggleable state of a tri-state checkbox.

Acceptable values are: 'on' | 'off' | 'indeterminate'