添加PDF

src/components/classRoomHelper/index.vue

@@ -259,7 +259,7 @@ export default {
 			let _this = this;
       let _successFileUrl = [];
       if (this.fileList.length <= 0) retrun;
-      let addType = ["DOCX", "DOC", "PPT", "PPTX", "MD", "TXT"];
+      let addType = ["DOCX", "DOC", "PPT", "PPTX", "MD", "TXT","PDF"];
       this.fileList.forEach(i => {
         if (
           addType.includes(