data下根据日期修改对应的周几

        var weekDay = ["星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"];
        var rol = res.data
        for(var i in rol){
          var date = rol[i].iyear + '/' + rol[i].imonth + '/' + rol[i].iday;
          var myDate = new Date(Date.parse(date));
          rol[i].week = weekDay[myDate.getDay()]
        }