Expo SystemUI

允许与系统 UI 元素交互的库。

Android

iOS

Web

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

Terminal

- npx expo install expo-system-ui

If you are installing this in an existing React Native app, start by installing expo in your project. Then, follow the additional instructions as mentioned by the library's README under "Installation in bare React Native projects" section.

API

import * as SystemUI from 'expo-system-ui';

Methods

`SystemUI.getBackgroundColorAsync()`

Android

iOS

Web

Gets the root view background color.

Returns:

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)`

Android

iOS

Web

Parameter	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.

Returns:

Promise<void>

Example

SystemUI.setBackgroundColorAsync("black");