egret基础-事件发送机制


class SampleDate extends egret.DisplayObjectContainer
{
public constructor()
{
super();
//创建一个男朋友
var boy:Boy = new Boy();
boy.name = "男朋友";
//创建一个女朋友
var girl:Girl = new Girl();
girl.name = "女朋友";
//注册侦听器
boy.addEventListener(DateEvent.DATE,girl.getDate,girl);
//男朋友发送要求
boy.order();
//约会邀请完成后，移除侦听器
boy.removeEventListener(DateEvent.DATE,girl.getDate,girl);
}
}



class Boy extends egret.Sprite
{
public constructor()
{
super();
}
public order()
{
//生成约会事件对象
var daterEvent:DateEvent = new DateEvent(DateEvent.DATE);
//添加对应的约会信息
daterEvent._year = 2014;
daterEvent._month = 8;
daterEvent._date = 2;
daterEvent._where = "肯德基";
daterEvent._todo = "共进晚餐";
//发送要求事件 ->将事件分派到事件流中
this.dispatchEvent(daterEvent);
}
}



class Girl extends egret.Sprite
{
//接收消息
public constructor()
{
super();
}
public getDate(evt:DateEvent)
{
console.log("得到了" + evt.target.name + "的邀请！" );
console.log("会在" + evt._year + "年" + evt._month + "月" + evt._date + "日，在"+ evt._where+ evt._todo);
}
}



class DateEvent extends egret.Event
{
//需要发送的信息格式
public static DATE:string = "约会";
public _year:number = 0;
public _month:number = 0;
public _date:number = 0;
public _where:string = "";
public _todo:string = "";
public constructor(type:string, bubbles:boolean=false, cancelable:boolean=false)
{
super(type,bubbles,cancelable);
}
}

调用方法

var _myData:SampleDate = new SampleDate();
this.addChild( _myData );