微信小程序实现商城倒计时

<view class="countDownTimeView pull-left countDownAllView text-left">
 
 <text>倒计时：</text> 
 <text class="voteText countDownTimeText">{{countDownHour}}</text> : 
 <text class="voteText countDownTimeText">{{countDownMinute}}</text> : 
 <text class="voteText countDownTimeText">{{countDownSecond}}</text>
 
</view>

const formatTime = date => {
 
 const year = date.getFullYear()
 const month = date.getMonth() + 1
 const day = date.getDate()
 const hour = date.getHours()
 const minute = date.getMinutes()
 const second = date.getSeconds()
 
 return [year, month, day].map(formatNumber).join('/') + ' ' + [hour, minute, second].map(formatNumber).join(':')
 
}
 
const formatNumber = n => {
 n = n.toString()
 return n[1] ? n : '0' + n
}
 
module.exports = {
 formatTime: formatTime
}

var util = require('../../utils/util.js'); //调用微信小程序中时间格式化的js
 
Page: ({
 
 data: {
 
 countDownHour: 0, //倒计时 -时
 countDownMinute: 0, //倒计时 -分
 countDownSecond: 0, //倒计时-秒
 
 },
 
 
 
 // 页面渲染后 执行
 
 onLoad: function () {
 
 //设置倒计时时间，1s变换一次
 var interval = setInterval(function () {
 var d = new Date(); //获取系统日期和时间
 var nowHour = d.getHours(); //小时
 var nowMinutes = d.getMinutes(); //分
 var nowSeconds = d.getSeconds(); //秒
 
 // 显示在倒计时中的小时位
 var hour = 24 - nowHour;
 
 // 显示在倒计时中的分钟位
 var minutes = 60 - nowMinutes;
 
 // 显示在倒计时中的秒数
 var seconds = 60 - nowSeconds;
 
 
 //当小时、分钟、秒都为0时，活动结束，倒计时显示为00:00:00
 if (hour == 0 && minutes == 0 && seconds == 0) {
 
 clearInterval(interval);
 wx.showToast({
 title: '活动已结束',
 });
 console.log(totalSecond);
 
 this.setData({
 countDownHour: '00',
 countDownMinute: '00',
 countDownSecond: '00',
 });
 }
 
 
 //当小时位、分钟位、秒位小于10时，用字符串拼接的方式显示，例如：06:08:02
 
 if (hour < 10) {
 hour = "0" + hour;
 }
 if (minutes < 10) {
 minutes = "0" + minutes;
 }
 if (seconds < 10) {
 seconds = "0" + seconds;
 }
 this.setData({
 countDownHour: hour,
 countDownMinute: minutes,
 countDownSecond: seconds,
 });
 }.bind(this), 1000);
 },
})