课程列表无数据时，下拉内容有问题，会闪的问题

src/views/portal/course/Index.vue

@@ -111,7 +111,7 @@
           <div class="pagination-div">
             <span class="pag-text" @click="loadMore()" v-if="moreState == 1 && courseList.length>=course.pageSize">加载更多</span>
             <span class="pag-text-msg" v-else-if="moreState == 2">数据加载中</span>
-            <span class="notcoures" v-else-if="moreState == 3">
+            <span class="notcoures" v-else-if="moreState == 3 && courseList.length==0">
               <img :src="`${webBaseUrl}/images/nocouresimg.png`" alt="">
               <h5>暂无课程，请优先学习其它课程吧～</h5>
             </span>
@@ -465,6 +465,7 @@ export default {
       this.searchData();
     },
     handleScroll() {
+      if(this.courseList.length>6){
 
         let innerHeight = document.querySelector("#couser-list-content").clientHeight;
         let outerHeight = document.documentElement.clientHeight;
@@ -486,6 +487,8 @@ export default {
           }
         //}
 
+      }
+
     },
     toNeedCourse() {
       // 需要先切换标签