最近在写一个类似拼夕夕拼团的活动，就几个人付相同的钱，即可成团。这就需要一个倒计时，来计算活动结束时间
代码如下：
var that = this;
var h,m,s,t;
var leftTime =that.classInfo.countdown; //这个时间是倒计时的毫秒数，我这里是由后台返的，也可自行计算（既活动结束时间转化成毫秒减去当前时间转化成毫秒），若为负数或者为0，则当前倒计时结束
console.log(leftTime);
that.cxtimer = setInterval(function () {
leftTime--;
if (leftTime>0){
h = Math.floor(leftTime/60/60/24);
m = Math.floor(leftTime/60/60) - h*24;
s = Math.floor(leftTime/60 - h*24*60 - m*60);
t = Math.floor(leftTime - s*60 - m*60*60 - h*24*60*60)
// console.log(h,m,s)
that.cxh = h<10?'0'+h:h;//这里是天，时，分，秒，等
that.cxm = m<10?'0'+m:m;
that.cxs = s<10?'0'+s:s;
that.cxt = t<10?'0'+t:t;
// console.log(that.cxh);
}
if(Number(leftTime)<=1){
that.cxh = '00'
that.cxm = '00'
that.cxs = '00'
that.cxt = '00'
clearInterval(that.cxtimer);
}
}.bind(that),1000)
如果在一个列表中展示倒计时，该如何实现呢，代码如下：
timer() { //页面多个定时器 //主要逻辑都在这页面更新
let that = this;
that.list = that.classInfo.order;//这是需要展示倒计时的列表
var listtime= that.listtime;
for(var i=0;i<that.list.length;i++){
that.listtime[i] = ''
var item = that.list[i];
that.timeradd(item,i,1);
}
},
timeradd(item,i){
var that = this;
var h,m,s,t,rens;
var leftTime = item.countdown;//列表中每一项的倒计时
that.timergroup = setInterval(function () {
leftTime--;
if (leftTime>0){
h = Math.floor(leftTime/60/60/24);
m = Math.floor(leftTime/60/60) - h*24;
s = Math.floor(leftTime/60 - h*24*60 - m*60);
t = Math.floor(leftTime - s*60 - m*60*60 - h*24*60*60);
rens = h+'天'+m+'时'+s+'分'+t+'秒';
}else{
rens = '0天0时0分0秒';
clearInterval(that.timergroup);
}
that.listtime[i] = rens;
that.$forceUpdate()//强制刷新数据
}.bind(that),1000)
},
以上即是倒计时的写法
标签：leftTime,60,floor,列表,倒计时,计算,24,Math From： https://www.cnblogs.com/bingchenzhilu/p/17235302.html