DateTimePicker里面有个自带属性 可以实现这个需求，如图：

// 设置当前当天时间范围 00: 00: 00 - 23:59:59
const currentDate = [setDefaultDate(0), setDefaultDate(1)]

const setDefaultDate = (
  type:number
): string => {
  let t = '';
  let date = new Date();
  let dateMap = {
    year: date.getFullYear(),
    month: date.getMonth() + 1,
    day: date.getDate(),
  };

  let month = dateMap.month >= 10 ? dateMap.month : "0" + dateMap.month
  let day = dateMap.day >= 10 ? dateMap.day : "0" + dateMap.day
  //当天默认初始时间 00:00:00
  if (type === 0) {
    t = date.getFullYear() + "-" + month + "-" + day + ' '+ '00' + ':'+ '00' +':'+ '00';
  }

  //当天默认初始时间 23:59:59
  if (type === 1) {
    t = date.getFullYear() + "-" + month + "-" + day + ' '+ '23' + ':'+ '59' +':'+ '59';
  }
  return t;
};