保存二维码图片时使用作品标题作为默认文件名。（还需要后端配合修改）

src/views/material/popup/share.vue

@@ -30,9 +30,9 @@
           </li>
         </ul>
       </div>
-
+      
       <div class="ui-message-footer footer-material">
-        <button @click="downloadImg(item.qrCode)" class="ui-button">
+        <button @click="downloadImg(item)" class="ui-button">
           下载二维码
         </button>
         <button @click="copy(item.share)" class="ui-button submit">
@@ -58,11 +58,11 @@ export default {
   },
   mounted() {},
   methods: {
-    downloadImg(url) {
+    downloadImg(workItem) {
       var a = document.createElement("a");
       var event = new MouseEvent("click");
-      a.download = "qrcode";
-      a.href = url;
+      a.download = workItem.name;
+      a.href = workItem.qrCode;
       a.dispatchEvent(event);
     },
     copy(text) {