关闭定时器(setTimeout/clearTimeout|setInterval/clearInterval)

　1.1 开启Timeout程序: scope.setTimeout("functionName()" | functionHandle, timeValue) 返回值:timerID

　　1.2 关闭Timeout程序: scope.clearTimeout(timerID);

　　

　　2.1 开启Interval程序: scope.setInterval("functionName()" | functionHandle, timeValue)  返回值:timerID

　　2.2 关闭Interval程序: scope.clearInterval(timerID);

60秒倒计时：

  let _this = this
      this.sendState = true;
     let time = setInterval(function(){
          _this.countdown-=1;
          if(_this.countdown==0){
            clearInterval(time)
            _this.sendState = false;
            _this.countdown = 60
          }
          console.log(_this.countdown)
      },1000)