s面向对象的写法

js面向对象的写法

一、在html中引入该js文件，使用时：

<script>
    var buybw8product = new buybw8product();
</script>

二、一般写一个较大的模块的js代码时，采用这种方法写js

新建一个js,内容结构如下：

/**
 * create by wkk
 * 描述：***
 */
!function(){
    function b(){
        var that = this;
        //当前是否到期集合
        this.moduleisexpired = {
            ticketisexpired : $("#ticketisexpired"),
            ccisexpired     : $("#ccisexpired"),
            imisexpired     : $("#imisexpired")
        };
        //工单购买坐席数的change事件
        $("#ticketseatnum").on('change', (function(){
            var ticketseatnum = $(this).val() ? $(this).val() : 0;
            if(parseint(ticketseatnum) <= 0){
                alert('请填写正确的工单购买坐席数');
                that.disablebuybutton();
                // 清空工单的金额，新计算余额
                that.emptymoney('ticket');
                return false;
            }
            //购买工单周期
            var ticketseatyear = parseint($(that.seatyearselect.ticketseatyear).val());
            //不存在周期，表示不过期并且原有坐席数不为0
            if($("#ticketseatyear").length <= 0){
                //计算新的周期
                var ticketcurexpiretime = $(that.allcurexpiretime.ticketcurexpiretime).text();
                //从今天到到期日期的天数差值
                var todaydate = that.gettodaydate();
                var expiretimedays = that.datediff(todaydate, ticketcurexpiretime);
                var ticketseatyear = (parseint(expiretimedays)/365).tofixed(8);
            }
            if(ticketseatyear > 0){
                //计算工单的金额
                var ticketprice = $(that.productprice.ticketprice).text();
                //四舍五入->向下取整
                var tickettotalamount = math.floor(that.calcamount(ticketseatnum, ticketprice, ticketseatyear));

                //显示模块金额和总金额以及折扣信息
                that.showmoduletotalamountandtotalmoneyanddiscount('ticket', tickettotalamount, ticketseatnum, ticketseatyear);
            }
        }));
        /**
         * 比较两个日期的大小,返回值比较大的日期
         * @param date1
         * @param date2
         * @returns date
         */
        this.tab = function (date1,date2){
            var odate1 = new date(date1);
            var odate2 = new date(date2);
            if(odate1.gettime() >= odate2.gettime()){
                return date1;
            } else {
                return date2;
            }
        }

        /**
         * 返回今天的日期  格式：2018-08-08
         */
        this.gettodaydate = function(){
            var mydate = new date;
            var year = mydate.getfullyear();//获取当前年
            var month = mydate.getmonth()+1;//获取当前月
            var date = mydate.getdate();//获取当前日
            return year+'-'+month+'-'+date;
        }

        /**
         * 计算天数差的函数，通用
         * @param sdate1
         * @param sdate2
         * @returns {number}
         */
        this.datediff = function(sdate1,  sdate2){ //sdate1和sdate2是2006-12-18格式
            var  adate,  odate1,  odate2,  idays
            adate  =  sdate1.split("-")
            odate1  =  new  date(adate[1]  +  '-'  +  adate[2]  +  '-'  +  adate[0])    //转换为12-18-2006格式
            adate  =  sdate2.split("-")
            odate2  =  new  date(adate[1]  +  '-'  +  adate[2]  +  '-'  +  adate[0])
            idays  =  parseint(math.abs(odate1  -  odate2)  /  1000  /  60  /  60  /24)    //把相差的毫秒数转换为天数
            return  idays
        }
    }
    window.buybw8product = b;
}();