在 TypeScript 中声明 UInt8Array 变量

Question

如何在TypeScript中声明UInt8Array类型的函数参数？

import * as fs from "fs";
fs.readFile(fileName, (err: string, data: UInt8Array) => {
                if (err) {
                    return console.error(err);
                }
                console.log("file text: " + data.toString());
            });

我有一个错误：

error TS2304: Cannot find name 'UInt8Array'

谢谢

Answer 1

以下实例适用于 TypeScript 1.6（撰写本文时的最新稳定版本）：

let t01 = new Uint8Array([1, 2, 3, 4]);
let t02 = new Int8Array([1, 2, 3, 4]);  
let t03 = new Uint8Array([1, 2, 3, 4]);
let t04 = new Uint8ClampedArray([1, 2, 3, 4]);
let t05 = new Int16Array([1, 2, 3, 4]);
let t06 = new Uint16Array([1, 2, 3, 4]);
let t07 = new Int32Array([1, 2, 3, 4]);
let t08 = new Uint32Array([1, 2, 3, 4]);
let t09 = new Float32Array([1.5, 2.5, 3.5, 4.5]);
let t10 = new Float64Array([1.5, 2.5, 3.5, 4.5]);

let arrayBuffer = new ArrayBuffer(16);

Answer 2

您的错误消息表明存在拼写错误，即

error TS2304: Cannot find name 'UInt8Array'

抱怨UInt8Array。但您要查找的名称可能是 Uint8Array，小写 i.

在 TypeScript 中声明 UInt8Array 变量

Declare UInt8Array variable in TypeScript

javascript

fs

typescript