fix登录时检测断网设置

src/features/OnlineExam/OnlineExamList.vue

@@ -81,13 +81,13 @@ export default {
         "/api/ecs_exam_work/exam/ipLimit/" + course.examId
       )).data;
       // await new Promise(resolve => setTimeout(() => resolve(), 3000));
-      if (ipLimit.limited) {
+      if (ipLimit === undefined) {
         this.spinShow = false;
-        this.$Message.error("IP受限，请到中心指定地点进行考试！");
         return;
       }
-      if (ipLimit === undefined) {
+      if (ipLimit.limited) {
         this.spinShow = false;
+        this.$Message.error("IP受限，请到中心指定地点进行考试！");
         return;
       }