Base64 upload pictures, get pictures MD5

Base64 upload pictures, get pictures MD5 

 

base64 convert the picture

//base64转化ArrayBuffer再SparkMD5
function _base64ToArrayBufferToMD5(base64) {
　　const buffer = uni.base64ToArrayBuffer(base64)
　　var spark = new SparkMD5.ArrayBuffer();
　　spark.append(buffer);
　　var hexHash = spark.end(false);
　　return hexHash;
}