//傳入數(shù)據(jù)庫結(jié)束時(shí)間參數(shù)并計(jì)算倒計(jì)時(shí)
  countdown(endTime){//取出競(jìng)拍結(jié)束時(shí)間，精確到秒，如果數(shù)據(jù)庫設(shè)置的是精確到毫秒，這里需要再除以1000
        let auctionEndtime = res.data.end_time
        console.log(res)
        //獲取當(dāng)前系統(tǒng)時(shí)間,默認(rèn)精確到毫秒，這里要用秒，所以除以1000
        var nowTime = new Date().getTime() / 1000
        //剩余時(shí)間總的秒數(shù)
        var totalSecond = Math.floor(auctionEndtime - nowTime)
        console.log('剩余秒數(shù)',totalSecond)
        //計(jì)算倒計(jì)時(shí)
        this.doCountdown(totalSecond)
  }

//計(jì)算商品倒計(jì)時(shí)
  doCountdown(totalSecond){
    let _this = this
    //每隔一秒執(zhí)行一次代碼，將計(jì)數(shù)器賦值給頁面變量myTime
    myTime =  setInterval(function () {
        //如果競(jìng)拍已經(jīng)結(jié)束
        if(totalSecond < 0){
          _this.setData({
            clock: ''
          })
          clearInterval(myTime)
          return 
        }else{
          //執(zhí)行計(jì)算
          var time = _this.formatTime(totalSecond)
          _this.setData({
            clock: time
          })
        }
        totalSecond --;
    },1000)
  },

//倒計(jì)時(shí)時(shí)間格式化
  formatTime(totalSecond){
    //剩余天數(shù)
    var day = Math.floor(totalSecond / 3600 / 24)
    //n天后剩余小時(shí)數(shù)
    var hour = Math.floor(totalSecond /3600 % 24)
    //n天n小時(shí)后剩余分鐘數(shù)
    var min = Math.floor(totalSecond / 60 % 60)
    //n天n小時(shí)n分鐘后剩余秒數(shù)
    var sec = Math.floor(totalSecond % 60)
    return day + "天" + hour + "小時(shí)" + min + "分" + sec + "秒"
  }