uniapp ArrayBuffer转16进度字符串 以及 十六进制转ASCII码

1.ArrayBuffer转16进度字符串

    // ArrayBuffer转16进度字符串示例
            // ab2hex(buffer) {
            //     const hexArr = Array.prototype.map.call(
            //         new Uint8Array(buffer),
            //         function(bit) {
            //             return ('00' + bit.toString(16)).slice(-2)
            //         }
            //     )
            //     return hexArr.join('')
            // },
            ab2hex(arrayBuffer) {
                return Array.prototype.map.call(new Uint8Array(arrayBuffer), x => ('00' + x.toString(16)).slice(-2)).join('');
            },
            

2.十六进制转ASCII码

 hexCharCodeToStr(hexCharCodeStr) {
                var trimedStr = hexCharCodeStr.trim();
                var rawStr = trimedStr.substr(0, 2).toLowerCase() === "0x" ? trimedStr.substr(2) : trimedStr;
                var len = rawStr.length;
                if (len % 2 !== 0) {
                   console.log("存在非法字符!");
                    return "";
                }
                var curCharCode;
                var resultStr = [];
                for (var i = 0; i < len; i = i + 2) {
                    curCharCode = parseInt(rawStr.substr(i, 2), 16);
                    resultStr.push(String.fromCharCode(curCharCode));
                }
                return resultStr.join("");
            },