import{arkts}from'鸿蒙模块';functionarrayBufferToBase64Url(arrayBuffer:ArrayBuffer):string{// 将ARRAY_BUFFER数据转换为base64格式字符串constbase64=btoa(String.fromCharCode.apply(null,newUint8Array(arrayBuffer)));// 将base64格式字符串转换为base64url格式字符串constbase64url=base64.replace(/\+/g,'-...
public base642Buffer(str: string){ let helper = new util.Base64Helper(); let temp: Uint8Array = helper.decodeSync(str); let res: ArrayBuffer = temp.buffer as ArrayBuffer; return res; } /** * 图片Uri转ArrayBuff * @param uri * @returns */ public ImageUri2Buffer(uri: string){ let...
log(base64String); // 输出: "SGVsbG8=" 在Node.js环境中 在Node.js中,你可以直接使用Buffer类,它提供了将Uint8Array转换为Base64编码的方法。 javascript function uint8ArrayToBase64(uint8Array) { return Buffer.from(uint8Array).toString('base64'); } // 使用示例 const uint8Array = new Uint...
const buffer = new ArrayBuffer(16); const view = new Uint32Array(buffer); console.log(Uint32Array.BYTES_PER_ELEMENT); // 4 ③ TypedArray.prototype.buffer TypedArray 实例的 buffer 属性会返回内存中对应的 ArrayBuffer对象,只读属性。 const a = new Uint32Array(8); const b = new Int32Array(a...
7FIEMmzYimRTuisS8aYRWTykA060xDtKipVelhLYiGRU+6WhJdHai1QK+6X6ZeFXYt9rBEOhzosCaqnfHPtO2TfpV0JXOxgXB/v5t7q0PZ1CN66I2+D3460q/lodkgpdjibeNm/fVtLk4YEK1O5uSkAAAAAElFTkSuQmCC'; let result:Uint8Array = that.decodeSync(base64, util.Type.MIME); let buf:ArrayBuffer = result.buffer as ...
buffer); // 使用btoa将Uint8Array转换为Base64编码的字符串 let base64 = new util.Base64...
const buffer = new ArrayBuffer(8); // 创建一个长度为8的ArrayBuffer对象 const int8Array = new Int8Array(buffer); // 使用ArrayBuffer创建一个Int8Array对象 // 通过索引操作Int8Array int8Array[0] = 10; int8Array[1] = 20; console.log(int8Array); // 输出:Int8Array [ 10, 20 ] ...
//Get array buffer from any object ab=toArrayBuffer(newBuffer(100)) ab=toArrayBuffer(newFloat32Array(12)) ab=toArrayBuffer(dataURIstr) ab=toArrayBuffer(base64str) ab=toArrayBuffer(ndarray) ab=toArrayBuffer([[0,1,0],[1,0,1]])
buffer.open(QIODevice::WriteOnly); pixmap.save(&buffer,"png",0); QByteArray->QString QString str2 = QString(byteArray.toBase64()); QString->QByteArray QByteArray byteArray = QByteArray::fromBase64(str2.toLocal8Bit(); QByteArray->图片 ...
问在javascript中将Float32Array转换为base64EN当前代码的问题是nacl.util.encodeBase64()接受字符串、...