Merge branch 'dev_cd' of http://g.uzosp.com/cxz/jd-vx-app into dev_cd

pages/home.vue

@@ -8,7 +8,7 @@
             </view>
         </u-swiper>
         <u-gap bgColor="transparent" height="15"></u-gap>
-        <div class="content__code">
+        <div class="content__code" v-if="freeCode.mainImgUrl">
             <div class="code__img">
                 <image :src="freeCode.mainImgUrl" class="code__img"></image>
             </div>