微信小程序实现倒计时

JS页面代码段：

const app = getApp()
let goodsList = [
  { actEndTime: '2018-07-21 21:00:34' },
  { actEndTime: '2028-07-17 21:00:37' },
  { actEndTime: '2018-09-21 05:00:59' },
  { actEndTime: '2018-08-19 07:00:48' },
  { actEndTime: '2018-08-28 03:00:11' }
]
Page({

  data: {
    countDownList: [],
    actEndTimeList: []
  },

  onLoad: function () {
    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();
  },

  //当时间小于两位数时十位数补零。
  timeFormat: function (param) {//小于10的格式化函数
    return param < 10 ? '0' + param : param;
  },

  //倒计时函数
  countDown: function () {
    // 获取当前时间，同时得到活动结束时间数组
    let newTime = new Date().getTime();//当前时间
    let endTimeList = this.data.actEndTimeList;//结束时间的数组集合
    let countDownArr = [];//初始化倒计时数组

    // 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);
    })
    //每隔一秒执行一次倒计时函数， 渲染
    this.setData({ countDownList: countDownArr })
    setTimeout(this.countDown, 1000);
  }
})

wxml页面代码段

<view class='tui-countdown-content' wx:for="{{countDownList}}" wx:key="countDownList">
 距结束
  <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>

wxss页面代码段

page{
  background: #f5f5f5;
}
.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:#ccc;
  color: #000;
  margin: 0 5px;
}
.tui-countdown-bg{
   background: red;
  color: #fff;
}

.container{
  width: 100%;
  display: flex;
  justify-content: center;
}
.backView{
  width:690rpx;
  background: #fff;
  display: flex;
  flex-direction: column;
  margin-bottom: 30rpx;
}
.createDate
{
  background: #f5f5f5;
  padding:15rpx 15rpx 10rpx 15rpx;
  line-height: 50rpx;
   font-size: 28rpx;
   color: gainsboro;
   text-align: center;
}
.backViewitem1{

  display: flex;
  flex-direction: row;
  height: 55rpx;
align-items: center;
padding:8rpx 40rpx;
border-bottom: 2rpx solid #f5f5f5;
}
.ico
{
  width:35rpx;
  height:35rpx;
}
.name
{
  color: #c13176;
  margin-left: 20rpx;
  font-size: 28rpx;
}

.details
{
  font-size:24rpx;
  letter-spacing: 2rpx;

}
.backViewitem2{
  
  display: flex;
  flex-direction: row;
  line-height: 35rpx;
  min-height:  70rpx;
padding: 15rpx 40rpx 10rpx 40rpx;
border-bottom: 2rpx solid #f5f5f5;
}
.details1
{
  color:#888;
  font-size:23rpx;
  letter-spacing: 2rpx;

}