微信小程序实现团购或秒杀批量倒计时

let goodsList = [
 {actEndTime: '2018-05-01 10:00:43'},
 {actEndTime: '2018-04-01 11:00:00'},
 {actEndTime: '2018-06-01 12:45:56'},
 {actEndTime: '2018-07-01 15:00:23'},
 {actEndTime: '2018-05-23 17:00:22'},
 {actEndTime: '2018-05-14 19:00:44'},
 {actEndTime: '2018-05-21 21:00:34'},
 {actEndTime: '2018-06-17 09:00:37'},
 {actEndTime: '2018-03-21 05:00:59'},
 {actEndTime: '2018-04-19 07:00:48'},
 {actEndTime: '2018-04-28 03:00:11'}
]
Page({
 data: {
 countDownList: [],
 actEndTimeList: []
 },
 onLoad(){
 let endTimeList = [];
 // 将活动的结束时间参数提成一个单独的数组，方便操作
 goodsList.forEach(o => {endTimeList.push(o.actEndTime)})
 this.setData({ actEndTimeList: endTimeList});
 // 执行倒计时函数
 this.countDown();
 },
 timeFormat(param){//小于10的格式化函数
 return param < 10 ? '0' + param : param; 
 },
 countDown(){//倒计时函数
 // 获取当前时间，同时得到活动结束时间数组
 let newTime = new Date().getTime();
 let endTimeList = this.data.actEndTimeList;
 let countDownArr = [];

 // 对结束时间进行处理渲染到页面
 endTimeList.forEach(o => {
  let endTime = new Date(o).getTime();
  let obj = null;
  // 如果活动未结束，对时间进行处理
  if (endTime - newTime > 0){
  let time = (endTime - newTime) / 1000;
  // 获取天、时、分、秒
  let day = parseInt(time / (60 * 60 * 24));
  let hou = parseInt(time % (60 * 60 * 24) / 3600);
  let min = parseInt(time % (60 * 60 * 24) % 3600 / 60);
  let sec = parseInt(time % (60 * 60 * 24) % 3600 % 60);
  obj = {
   day: this.timeFormat(day),
   hou: this.timeFormat(hou),
   min: this.timeFormat(min),
   sec: this.timeFormat(sec)
  }
  }else{//活动已结束，全部设置为'00'
  obj = {
   day: '00',
   hou: '00',
   min: '00',
   sec: '00'
  }
  }
  countDownArr.push(obj);
 })
 // 渲染，然后每隔一秒执行一次倒计时函数
 this.setData({ countDownList: countDownArr})
 setTimeout(this.countDown,1000);
 }
})

<view class='tui-countdown-content' wx:for="{{countDownList}}" wx:key="countDownList">
 剩余
 <text class='tui-conutdown-box'>{{item.day}}</text>天
 <text class='tui-conutdown-box'>{{item.hou}}</text>时
 <text class='tui-conutdown-box'>{{item.min}}</text>分
 <text class='tui-conutdown-box tui-countdown-bg'>{{item.sec}}</text>秒
</view>

page{background-color: #eee;}
.tui-countdown-content{
 height: 50px;
 line-height: 50px;
 text-align: center;
 background-color: #fff;
 margin-top: 15px;
 padding: 0 15px;
 font-size: 18px;
}
.tui-conutdown-box{
 display: inline-block;
 height: 26px;
 width: 26px;
 line-height: 26px;
 text-align: center;
 background-color: #000;
 color: #fff;
 margin: 0 5px;
}
.tui-countdown-bg{
 background-color: #DF0101;
}