interval(completeTime) {
      console.log("1");
      let _this = this;
      _this.timerCount = setInterval(() => {
        setTimeout(() => {
          let faultDate = new Date().getTime();
          console.log(faultDate);
          let stime = Date.parse(new Date(faultDate));
          let etime = Date.parse(new Date(completeTime));
          //两个时间戳相差的毫秒数
          let timer = etime - stime;
          if (timer > 0) {
            _this.tipShow = true;
            let days = Math.floor(timer / (1000 * 60 * 60 * 24));
            let hours = Math.floor(
              (timer % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60)
            );
            let minutes = Math.floor((timer % (1000 * 60 * 60)) / (1000 * 60));
            let seconds = Math.floor((timer % (1000 * 60)) / 1000);
            if (days <= 0) {
              _this.tips = hours + "时" + minutes + "分" + seconds + "秒";
            } else {
              _this.tips =
                days + "天" + hours + "时" + minutes + "分" + seconds + "秒";
            }
            console.log(_this.tips);
            --timer;
          } else {
            _this.tipShow = false;
            clearInterval(_this.timerCount);
          }
        }, 0);
      }, 1000);
    },