需求为： 审批页面，单条审批时弹出审批弹框，其中申请权限时间，默认开始时间为当前日期，结束日期为：当前日期+申请天数

实现结果如下：

展示部分代码：

 // 获取当前时间为默认时间
    getDate() {
      let now = new Date();
      let year = now.getFullYear(); //得到年份
      let month = now.getMonth(); //得到月份
      let date = now.getDate(); //得到日期
      month = month + 1;
      month = month.toString().padStart(2, "0");
      date = date.toString().padStart(2, "0");
      this.addDate(`${year}-${month}-${date}`,this.approvalData.applyTime-0)
      this.formData.startDate = `${year}-${month}-${date}`
      const arr = []
      arr.push(this.formData.startDate,this.formData.endDate)
      this.$set(this.formData, 'times', arr)
    },

    // 获取结束时间 date为相加前的时间， days 为 需要相加的天数
    addDate(date, days) {
      var date = new Date(date);
      date.setDate(date.getDate() + days);
      let year = date.getFullYear();
      let month = date.getMonth() + 1;
      let day = date.getDate();
      let mm = "'" + month + "'";
      let dd = "'" + day + "'";
      if(mm.length === 3) {
        month = "0" + month;
      }
      if(dd.length === 3) {
        day = "0" + day;
      }
      this.formData.endDate = year + "-" + month + "-" + day
    },

 此时需要注意 this.$set的坑，当key值不变时，this.$set不生效，需要清楚key值

 // 清除数据
    initDate () {
      this.$set(this.formData, 'times', '')
      this.formData = {
        times: [],
        startDate: '',
        endDate: '',
        approvaStatus: ''
      }
    },