修改 小程序 BUG

learnOnline/pages/learnSystem/courseContent/examDetail/examDetail.js

@@ -128,7 +128,9 @@ Page({
    */
   onLoad: function (options) {
     wx.showLoading({ title: '页面加载中...', mask: true })
-    this.setData({ 'exam': this.updateData(wx.getStorageSync('_homework')) })
+    if (wx.getStorageSync('_homework')) {
+      this.setData({ 'exam': this.updateData(wx.getStorageSync('_homework')) })
+    }
     CourseApi.getExamDetail(this.data.exam.id, this.data.exam.semester_id, (res) => {
       let _data = res.data
       let json = _data.homework