小程序实现列表多个批量倒计时

var dates=[ {  dat:324235235 }, {  dat:7200000 }, {  dat:675875754 }] module.exports = { datetime: dates}

<view wx:for="{{wearList.datetime}}" wx:for-item="item" wx:key="id"> <view class='dates'>{{item.difftime}}</view></view>

var dates=require('../utils/dates.js');//数据文件 Page({ data:{}, onShow(a){  // console.log(dates.datetime)//数据  let that=this;  let len=dates.datetime.length;//时间数据长度    function nowTime() {//时间函数   // console.log(a)   for (var i = 0; i < len; i++) {    var intDiff = dates.datetime[i].dat;//获取数据中的时间戳    // console.log(intDiff)    var day=0, hour=0, minute=0, second=0;        if(intDiff > 0){//转换时间     day = Math.floor(intDiff / (60 * 60 * 24));     hour = Math.floor(intDiff / (60 * 60)) - (day * 24);     minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);     second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);     if(hour <=9) hour = '0' + hour;     if (minute <= 9) minute = '0' + minute;     if (second <= 9) second = '0' + second;     dates.datetime[i].dat--;     var str=hour+':'+minute+':'+ second       // console.log(str)      }else{     var str = "已结束！";     clearInterval(timer);     }    // console.log(str);    dates.datetime[i].difftime = str;//在数据中添加difftime参数名，把时间放进去   }   that.setData({    wearList: dates   })   // console.log(that)  }   nowTime();  var timer = setInterval(nowTime, 1000);  }})