根据后端返回的图片流格式，选用合适方法转换
下面以base64为例
if(res.status == 200) {res.data.data.forEach((item,index) => {let Array = 'data:image/png;base64,' + itemlet blob = this.base64toBlob(Array)let url = URL.createObjectURL(blob)this.imageList.push({name:this.keyList[index],src:url})});
}
下面是图片流的两种转换方式：
arrayBufferToBase64(buffer) {var binary = ''var bytes = new Uint8Array(buffer)var len = bytes.byteLengthfor (var i = 0; i < len; i++) {binary += String.fromCharCode(bytes[i])}return window.btoa(binary)
},
base64toBlob(dataurl) {var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);while (n--) {u8arr[n] = bstr.charCodeAt(n);}return new Blob([u8arr], { type: mime });
},
)
)
