function arrayBufferToBase64(arrayBuffer) { const uint8Array = new Uint8Array(arrayBuffer); const textEncoder = new TextEncoder(); const string = textEncoder.decode(uint8Array); const blob = new Blob([string]); return new Promise((resolve, reject) => { const reader = new FileReader()...
const arrayBufferToBase64 = (buffer) => { if (typeof TextDecoder !== 'undefined' && typeof btoa !== 'undefined') { return btoa(new TextDecoder().decode(new Uint8Array(buffer))); } else { return btoa(new Uint8Array(buffer).reduce((data, byte) => data + String.fromCharCode(byte)...
将ArrayBuffer 对象转成 Base64 字符串 参数 ArrayBuffer arrayBuffer 要转换成 Base64 字符串的 ArrayBuffer 对象 返回值 string Base64 字符串 示例代码 constarrayBuffer =newUint8Array([11,22,33])constbase64 = wx.arrayBufferToBase64(arrayBuffer)
有时候后台把图片资源通过arrayBuffer传给前端,这时候为了能正常显示,我们还需要在转化的base64字符串前面拼接上data:image/jpeg;base64, 所以我们整理一下,可以得出这样一个函数: const arrayBufferToBase64Img = (buffer) =>{ const str= String.fromCharCode(...newUint8Array(buffer));return`data:image/jpeg;...
基础,wx.arrayBufferToBase64,string wx.arrayBufferToBase64(ArrayBuffer arrayBuffer),功能描述,参数,ArrayBuffer arrayBuffer,返回值,string,示例代码
function _arrayBufferToBase64( buffer ) { var binary = ''; var bytes = new Uint8Array( buffer ); var len = bytes.byteLength; for (var i = 0; i < len; i++) { binary += String.fromCharCode( bytes[ i ] ); } return window.btoa( binary ); } 但是,非本地实现速度更快,例如...
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
问ArrayBuffer到base64编码的字符串ENfunction_arrayBufferToBase64(buffer){varbinary='';varbytes=newUint...
我们还需要在转化的base64字符串前⾯拼接 上data:image/jpeg;base64,所以我们整理⼀下，可以得出这样⼀个函数：const arrayBufferToBase64Img = (buffer) => { const str = String.fromCharCode(...new Uint8Array(buffer));return `data:image/jpeg;base64,${window.btoa(str)}`;} ...
const arrayBufferToBase64 = (buffer, contentType) => { // 用以下方法防止内存越界 let str = ''; const bytes = new Uint8Array( buffer ); const len = bytes.byteLength; for (let i = 0; i < len; i++) { str += String.fromCharCode(bytes[ i ]); ...