修改计时时间

src/pages/exam/courseExam/chapter/index.vue

@@ -198,8 +198,8 @@ export default {
           this.$route.query.id && this.$route.query.id.length > 5
             ? this.analysisInit()
             : this.changeData()
-          this.setClock(data.sheet.questions.duration)
-          this.time.duration = data.sheet.questions.duration
+          this.setClock(data.sheet.questions.duration || 0)
+          this.time.duration = data.sheet.questions.duration || 0
         })
         .finally(() => {
         })