页面修改

src/pages/course/course.vue

@@ -7,7 +7,7 @@
             label="课程名称" />
         </div>
         <div class="col-3">
-          <select-tree v-if="TreeCategoryList&&TreeCategoryList.length>0" :treeData='TreeCategoryList'
+          <select-tree   :treeData='TreeCategoryList'
             :defaultArray="returnString" nodeKey="CateId" :multiple="true" labelKey="CateName" childrenKey="ChildList"
             tipText="课程分类" @getChild="getChild"></select-tree>
         </div>