修改

src/pages/sale/courseList.vue

@@ -127,7 +127,10 @@
             <div class="d1" style="width:25%">
               <div class="di-title">课程名称</div>
               <div class="di-c" style="margin-top: 25px;">
-                <div><img :src="item.CoverImg" style="width:60px;height:60px;margin-right:10px;" /></div>
+                <div>
+                  <img :src="item.CoverImg" v-if="item.CoverImg" style="width:60px;height:60px;margin-right:10px;" />
+                  <img style="width:60px;height:60px;margin-right:10px;" v-else src="../../assets/images/default.png"/>
+                </div>
                 <div>{{item.CourseName}}</div>
               </div>
             </div>