uni 用到的时间戳转 YYYY-MM-DD hh:mm:ss

format() {
      let date = new Date(1598346851 * 1000);
      let YYYY = date.getFullYear();
      let MM = date.getMonth() + 1;
      MM = MM < 10 ? "0" + MM : MM;
      let DD = date.getDate();
      DD = DD < 10 ? "0" + DD : DD;
      let hh = date.getHours();
      hh = hh < 10 ? "0" + hh : hh;
      let mm = date.getMinutes();
      mm = mm < 10 ? "0" + mm : mm;
      let ss = date.getSeconds();
      ss = ss < 10 ? "0" + ss : ss;
      return YYYY + "-" + MM + "-" + DD + " " + hh + ":" + mm + ":" + ss;
    },