ios 中倒计时计算，时间戳为NaN

// 倒计时
    daojishi(params) {
      let _this = this;
      let datetemp = this.servertimes;
      let lasttime = Date.parse(datetemp.replace(/-/g,"/"));
      // new Date(datetemp).getTime()  为NaN
      let nowtime = parseInt(new Date().getTime());
      let intDiff =parseInt(lasttime - nowtime); //当前时间 - 预设时间
      if(intDiff>0){       
        intDiff = parseInt(intDiff/1000)
        window.setInterval(function () {   
          var day = 0,hour = 0,minute = 0,second = 0; //默认值     
          if (intDiff > 0) {       
            day = Math.floor(intDiff / (60 * 60 * 24));       
            hour = Math.floor(intDiff / (60 * 60)) - (day * 24);       
            minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);       
            second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);       
          }     
          if (minute <= 9) minute = '0' + minute;     
          if (second <= 9) second = '0' + second; 
          _this.servertime = hour +':'+ minute +':'+ second +" 内上门服务"  
          intDiff--;   
        }, 1000); 
      }else{
        _this.servertime = "逾期请联系客服";
      }
    },

安卓正常 Number.isNaN(new Date("2011/11/11 20:10:10").getTime())　　　　//false

ios中使用 Number.isNaN(new Date("2011/11/11 20:10:10").getTime())　　　　//true

　　　　  Number.isNaN(Date.parse("2011-11-11 20:10:10".replace(/-/g,"/"))) //false

综上：在ios中使用时间戳加减使用 Data.parse()转换