/*格式化日期：yyyy-MM-dd*/
      formatDate(date) {
        var myyear = date.getFullYear();
        var mymonth = date.getMonth() + 1;
        var myweekday = date.getDate();
        if (mymonth < 10) {
          mymonth = "0" + mymonth;
        }
        if (myweekday < 10) {
          myweekday = "0" + myweekday;
        }
        return (myyear + "-" + mymonth + "-" + myweekday);
      },