HorizontalFloatingToolbar

一个用于显示浮动操作栏的 Jetpack Compose HorizontalFloatingToolbar 组件。

Android

Included in Expo Go

Recommended version:

~57.0.3

Expo UI HorizontalFloatingToolbar 封装了官方 Jetpack Compose HorizontalFloatingToolbar，并显示一个悬浮在内容上方的水平工具栏，包含操作按钮。

🌐 Expo UI HorizontalFloatingToolbar wraps the official Jetpack Compose HorizontalFloatingToolbar and displays a horizontal toolbar that floats above content, containing action buttons.

注意：如果你只需要一个浮动按钮，请使用 FloatingActionButton 替代。

Pill-shaped floating toolbar with three icon buttons and a separate primary FAB

安装

🌐 Installation

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

🌐 Usage

可滚动内容上的浮动工具栏

🌐 Floating toolbar over scrollable content

将工具栏放置在带有 floatingToolbarExitAlwaysScrollBehavior 的 Box 中以实现滚动驱动的隐藏/显示行为。使用 align('bottomCenter') 将工具栏定位在屏幕底部。整个布局保持在 Compose 层内 — 无需 React Native 的绝对定位。

🌐 Place the toolbar inside a Box with floatingToolbarExitAlwaysScrollBehavior to get scroll-driven hide/show behavior. Use align('bottomCenter') to position the toolbar at the bottom of the screen. The entire layout stays within the Compose layer — no React Native absolute positioning needed.

FloatingToolbarExample.tsx

import {
  Box,
  HorizontalFloatingToolbar,
  Host,
  Icon,
  IconButton,
  LazyColumn,
  ListItem,
} from '@expo/ui/jetpack-compose';
import { align, fillMaxSize, fillMaxWidth, offset } from '@expo/ui/jetpack-compose/modifiers';

export default function FloatingToolbarExample() {
  return (
    <Host style={{ flex: 1 }}>
      <Box modifiers={[fillMaxSize()]} floatingToolbarExitAlwaysScrollBehavior="bottom">
        <LazyColumn modifiers={[fillMaxSize()]}>{/* ...list items... */}</LazyColumn>

        <HorizontalFloatingToolbar
          variant="vibrant"
          modifiers={[align('bottomCenter'), offset(0, -16)]}>
          <IconButton onClick={() => console.log('Edit pressed')}>
            <Icon source={require('./assets/edit.xml')} />
          </IconButton>
          <HorizontalFloatingToolbar.FloatingActionButton
            onClick={() => console.log('Add pressed')}>
            <Icon source={require('./assets/add.xml')} />
          </HorizontalFloatingToolbar.FloatingActionButton>
        </HorizontalFloatingToolbar>
      </Box>
    </Host>
  );
}

带浮动操作按钮的工具栏

🌐 Toolbar with FloatingActionButton

将 IconButton 用作工具栏项目的直接子元素，将 HorizontalFloatingToolbar.FloatingActionButton 用于主要操作。

🌐 Use IconButton as direct children for toolbar items, and HorizontalFloatingToolbar.FloatingActionButton for the primary action.

ToolbarWithFABExample.tsx

import { Host, HorizontalFloatingToolbar, IconButton, Icon } from '@expo/ui/jetpack-compose';

export default function ToolbarWithFABExample() {
  return (
    <Host matchContents>
      <HorizontalFloatingToolbar>
        <IconButton onClick={() => console.log('Edit pressed')}>
          <Icon source={require('./assets/edit.xml')} contentDescription="Edit" />
        </IconButton>
        <IconButton onClick={() => console.log('Share pressed')}>
          <Icon source={require('./assets/share.xml')} contentDescription="Share" />
        </IconButton>
        <HorizontalFloatingToolbar.FloatingActionButton onPress={() => console.log('Add pressed')}>
          <Icon source={require('./assets/add.xml')} contentDescription="Add" />
        </HorizontalFloatingToolbar.FloatingActionButton>
      </HorizontalFloatingToolbar>
    </Host>
  );
}

应用接口

🌐 API

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

Components

`HorizontalFloatingToolbar`

Type: React.Element<HorizontalFloatingToolbarProps>

Renders a HorizontalFloatingToolbar component. A horizontal toolbar that floats above content, typically used for action buttons.

HorizontalFloatingToolbarProps

`children`

Type: ReactNode

The children of the component.

`colors`

Optional • Type: HorizontalFloatingToolbarColors

Per-slot color overrides. Any field set here replaces the corresponding color from the variant default; unset fields fall back to the variant.

`modifiers`

Optional • Type: ModifierConfig[]

Modifiers for the component.

`variant`

Optional • Literal type: string • Default: 'standard'

The variant of the horizontal floating toolbar.

Acceptable values are: 'standard' | 'vibrant'

`HorizontalFloatingToolbarFloatingActionButton`

Type: React.Element<HorizontalFloatingToolbarFloatingActionButtonProps>

FloatingActionButton component for HorizontalFloatingToolbar. This component marks its children to be rendered in the FAB slot.

HorizontalFloatingToolbarFloatingActionButtonProps

`children`

Type: ReactNode

The children of the component.

`onPress`

Optional • Type: () => void

A callback that is called when the button is pressed.

Types

`HorizontalFloatingToolbarColors`

Property	Type	Description
fabContainerColor(optional)	`ColorValue`	Color of the floating action button container (background).
fabContentColor(optional)	`ColorValue`	Color of the floating action button content (icon).
toolbarContainerColor(optional)	`ColorValue`	Color of the toolbar container (background).
toolbarContentColor(optional)	`ColorValue`	Color of the toolbar content (icons/text).