图片长按保存

src/otherPages/createReferCode/index.vue

@@ -1,6 +1,6 @@
 <template>
   <view class="center">
-    <image class="w600" mode="widthFix" :src="referCodeBase64"></image>
+    <image class="w600" show-menu-by-longpress mode="widthFix" :src="referCodeBase64"></image>
     <button type="primary" @click="getReferCode()" class="mt30">重新获取</button>
   </view>
 </template>