设置下载证书的压缩质量

src/pages/cert/index.vue

@@ -95,7 +95,7 @@ export default {
           canvas.width = width
           canvas.height = height
           canvas.getContext('2d').drawImage(Img, 0, 0, width, height) // 将图片绘制到canvas中
-          dataURL = canvas.toDataURL('image/jpeg') // 转换图片为dataURL
+          dataURL = canvas.toDataURL('image/jpeg', 1) // 转换图片为dataURL
           resolve(dataURL)
         }
       })