Expo SystemUI
允许与系统 UI 元素交互的库。
expo-system-ui 使你能够与 React 树之外的 UI 元素进行交互。特别是根视图背景颜色，并在 Android 上全局锁定用户界面样式。
¥expo-system-ui enables you to interact with UI elements that fall outside of the React tree. Specifically the root view background color, and locking the user interface style globally on Android.
安装
¥Installation
- npx expo install expo-system-uiIf you are installing this in an existing React Native app (bare workflow), start by installing expo in your project. Then, follow the additional instructions as mentioned by library's README under "Installation in bare React Native projects" section.
API
import * as SystemUI from 'expo-system-ui';
Methods
SystemUI.getBackgroundColorAsync()
Gets the root view background color.
Promise<ColorValue | null>
Current root view background color in hex format. Returns null if the background color is not set.
Example
const color = await SystemUI.getBackgroundColorAsync();
SystemUI.setBackgroundColorAsync(color)
| Name | Type | Description |
|---|---|---|
| color | null | ColorValue | Any valid CSS 3 (SVG) color. |
Changes the root view background color. Call this function in the root file outside of you component.
Promise<void>
Example
SystemUI.setBackgroundColorAsync("black");