dataURLtoBlob(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});},//下载图片模板downLoadImg(){this.imgTemList.forEach(item=>{let database = "data:image/jpg;base64," + item.urllet blob_ = this.dataURLtoBlob(database);let url = {name: item.name || "图片.png", // 图片名称不需要加.png后缀名src: blob_};if (window.navigator.msSaveOrOpenBlob) {   // if browser is IEnavigator.msSaveBlob(url.src, url.name);//filename文件名包括扩展名，下载路径为浏览器默认路径} else {var link = document.createElement("a");link.setAttribute("href", window.URL.createObjectURL(url.src));link.setAttribute("download", url.name + '.png');document.body.appendChild(link);link.click();}})},