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

覆盖层

一个用于在另一个视图之上叠加内容的 SwiftUI Overlay 组件。

iOS

tvOS

GitHub

npm

更新日志

Expo UI Overlay 与官方 SwiftUI overlay 修饰符相匹配，并提供了一种将辅助内容叠加在视图之上的方式，同时使用指定的对齐方式进行定位。

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

OverlayExample.tsx

import { Host, Overlay, Text, Image } from '@expo/ui/swift-ui';
import {
  foregroundStyle,
  frame,
  font,
  background,
  clipShape,
  offset,
} from '@expo/ui/swift-ui/modifiers';

export default function OverlayExample() {
  return (
    <Host style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      <Overlay alignment="topTrailing">
        <Image
          systemName="bell.fill"
          modifiers={[font({ size: 28 }), foregroundStyle('#007AFF')]}
        />
        <Overlay.Content>
          <Text
            modifiers={[
              font({ size: 11, weight: 'bold' }),
              foregroundStyle('#FFFFFF'),
              frame({ width: 18, height: 18 }),
              background('#FF3B30'),
              clipShape('circle'),
              offset({ x: 8, y: -8 }),
            ]}>
            3
          </Text>
        </Overlay.Content>
      </Overlay>
    </Host>
  );
}

API

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

Component

`Overlay`

iOS

tvOS

Type: React.Element<OverlayProps>

OverlayProps

`alignment`

iOS

tvOS

Optional • Type: Alignment • Default: 'center'

The alignment of the overlay content relative to the base content.

`children`

iOS

tvOS

Type: React.ReactNode

Inherited Props

CommonViewModifierProps