fix: 当选择自定义的时候， 无法把输入框置空

src/views/courselibrary/CoursewareManage.vue

@@ -1373,6 +1373,7 @@ import ProjPowerList from "../../components/drawers/ProjPowerList";
 import ProjCheckShip from "../../components/drawers/ProjCheckPower";
 import AssessmentList from "../../components/drawers/AssessmentList.vue";
 import dialog from "@/utils/dialog";
+import {nextTick} from "vue"
 // import { queryAssessmentDetailList } from "@/api/indexResearch";
 import {
   list,
@@ -2610,6 +2611,23 @@ export default defineComponent({
 
       codeType: null, //二维码类型
     });
+    let RENDER_SINGLE =  true
+
+    watch(()=>state.cstm_hs, (value)=> {
+      !value &&  (RENDER_SINGLE = true)
+      console.log(value, "cstm_hs");
+    })
+    watch(()=>[state.xjkkinputV3], (value)=>{
+      // 避免初次渲染造成数据异常， 因为上面不是 props 传递进来的
+      // 所以不得已作此处理
+      if (RENDER_SINGLE) {
+        RENDER_SINGLE = false
+        return
+      }
+      console.log(value, "---------------")
+      nextTick(handleSelectSignDateTime)
+    }, {deep: true})
+
     const nums = ref(0);
     watch(durationText, (val) => {
       nums.value++;
@@ -3641,6 +3659,16 @@ export default defineComponent({
     };
     //保存开课
     const handleSureStu = async () => {
+      // 检测开课前后的数值是否正确
+      if ( !(isNumber(state.afterStartValue) && isNumber(state.beforeValue))) {
+        if(!(state.afterStartValue  === null && state.beforeValue === null)) {
+          message.warning("开始前或开始后数值有误，请重新填写")
+          return
+        }
+      }
+      function isNumber(value){
+        return typeof value === 'number' && !isNaN(value);
+      }
       if (editBeginClass.value) {
         message.info("讲师费已进入审批阶段，无法编辑");
         return;
@@ -5123,8 +5151,8 @@ export default defineComponent({
         // 如果不限制，那么就是从当前时间开始，到课程结束时间结束
         const diffStartTime = (dayjs(classStartTime).diff(dayjs(), "minute"))
         state.beforeValue = diffStartTime <= 0 ? 0 : diffStartTime
-        state.afterValue = (dayjs(endSignTime).diff(classEndTime, "minute"))
-        console.log("before value, after value", state.beforeValue, state.afterValue)
+        state.afterStartValue = (dayjs(endSignTime).diff(classEndTime, "minute"))
+        console.log("before value, after value", state.beforeValue, state.afterStartValue)
       } else if (type === signTimeSection.OpenDay) {
         // 如果限制在开课时间，选项签到规则是课程创建的“面授时间”的起始时间至开课当日23时59分。
         state.afterStartValue = (dayjs(endSignTime).diff(classEndTime, "minute"))