用于生成随机字节的通用库。
已弃用： 该模块在 SDK 49 中将不再可用。 请改用 expo-crypto。
expo-random 提供了用于创建强随机字节的原生接口。 使用 Random，你可以创建与 Node.js 核心 crypto.randomBytes API 等效的值。 expo-random 还可以与 expo-standard-web-crypto 配合使用，后者实现了用于生成随机字节的 W3C Crypto API。
| Android Device | Android Emulator | iOS Device | iOS Simulator | Web |
|---|---|---|---|---|
- npx expo install expo-randomIf you're installing this in a bare React Native app, you should also follow these additional installation instructions.
import * as Random from 'expo-random';
Random.getRandomBytes(byteCount)| Name | Type | Description |
|---|---|---|
| byteCount | number | A number within the range from |
Generates completely random bytes using native implementations. The byteCount property
is a number indicating the number of bytes to generate in the form of a Uint8Array.
Falls back to Math.random during development to prevent issues with React Native Debugger.
Returns
Uint8ArrayAn array of random bytes with the same length as the byteCount.
Random.getRandomBytesAsync(byteCount)| Name | Type | Description |
|---|---|---|
| byteCount | number | A number within the range from |
Generates completely random bytes using native implementations. The byteCount property
is a number indicating the number of bytes to generate in the form of a Uint8Array.
Returns
Promise<Uint8Array>A promise that fulfills with an array of random bytes with the same length as the byteCount.