showTimeIncrease(){//正计时     var self = this;     let count=0;     self.handle1 =  setInterval(() => {
          var hour = 0, minute = 0, second = 0;         hour=parseInt(count/60/60);         minute=parseInt(count/60%60);         second=parseInt(count%60);         this.html=self.toDouble(hour)+":"+self.toDouble(minute)+":"+self.toDouble(second);         count++;     },1000);

toDouble(num){
      if(num < 10){
          return '0'+ num;     }else{
          return '' + num;     } }

remainingTime(years){//倒计时     var self = this;     var dateFinal = new Date(years);  //设置倒计时到达时间     var dateNow = new Date();  //获取系统当前时间     var dateSub = dateFinal - dateNow;  //计算差值，单位毫秒     self.timeHtml  =  '00天00小时00分钟';     if(dateSub<=0){
          clearInterval(self.intervalDelete);         return;     }     var day = hour = minute = second = dayBase = hourBase = minuteBase = secondBase = 0;  //初始化各个数值     dayBase = 24 * 60 * 60 * 1000;  //计算天数的基数，单位毫秒。1天等于24*60*60*1000毫秒     hourBase = 60 * 60 * 1000;  //计算小时的基数，单位毫秒。1小时等于60*60*1000毫秒     minuteBase = 60 * 1000;  //计算分钟的基数，单位毫秒。1分钟等于60*1000毫秒     secondBase = 1000;  //计算秒钟的基数，单位毫秒。1秒钟等于1000毫秒     day = Math.floor(dateSub / dayBase);  //计算天数，并取下限值。如 5.9天 = 5天     hour = Math.floor(dateSub % dayBase / hourBase);  //计算小时，并取下限值。如 20.59小时 = 20小时     minute = Math.floor(dateSub % dayBase % hourBase / minuteBase);  //计算分钟，并取下限值。如 20.59分钟 = 20分钟     //当天数小于等于0时，就不用显示     if(day <= 0){
          self. timeHtml = self.toDouble(hour) + '小时' +self.toDouble(minute) + '分钟';     }else{
          self.timeHtml = day + '天' + self.toDouble(hour) + '小时' + self.toDouble(minute) + '分钟';     } }