iview中时间选择器可设置选择范围方法（一个月 一周等）

 <DatePicker
              type="datetimerange"
              :clearable="false"
              :options="options"
              :value='changeTime'
              placement="bottom-end"
              format="yyyy-MM-dd HH:mm:ss"
              placeholder="选择日期"
              style="width: 200px"
              @on-change='tiemChange'></DatePicker>

data () {
  return {
                 changeTime: [getDate('yyyy-MM-dd 00:00:00'), getDate('yyyy-MM-dd 23:59:59')],
                  options: {
                    disabledDate (date) {
                      return date && date.valueOf() > Date.now()
                    }
                  },
  }
}

 // 选择日期变化
    tiemChange (event) {
      event[1] = event[1].replace(/00:00:00/, '23:59:59')
      const day = Math.floor((getTime(event[1]) - getTime(event[0])) / 86400000)
      if (day > 30) {
        // this.changeTime = [getDate('yyyy-MM-dd 00:00:00'), getDate('yyyy-MM-dd 23:59:59')]
        return this.$Message.error('日期范围最大选择30天')
      } else {
        this.changeTime = event
        this.getTableList(1)
      }
    },