AS3中不同类间的广播与接收简单例子

1、文档类:DispatchEventDemo.as

package {
import flash.display.Sprite;
public class DispatchEventDemo extends Sprite
{
  public function DispatchEventDemo()
  {
   new A
   new B

  }
}
}

2、中间介质类,连系不同的类:DT.as

package {
import flash.events.EventDispatcher;
public class DT {
  private static  var _dispatcher:EventDispatcher;
  public static function get dispatcher():EventDispatcher{
   _dispatcher=_dispatcher==null?new EventDispatcher:_dispatcher
   return _dispatcher
   }
}
}

3、扩展事件类,方便进行事件中的参数传递:EventX.as

package {
import flash.events.Event
public class EventX extends Event {
  public static  const RECEIVE_ARG:String="receive_arg";
  private var _arg:Object
  public function EventX(type:String,arg:Object,bubbles:Boolean=false,cancelable:Boolean=false) {
   super(type,bubbles,cancelable);
   _arg=arg;
  }
  public function get arg():Object {
   return _arg;//返回参数对象
  }
}
}

4、包含事件接收的类:A.as

package {
import flash.events.*
public class A {
  public function A() {
   var dispatcher:EventDispatcher=DT.dispatcher;
   dispatcher.addEventListener(EventX.RECEIVE_ARG,onTrace);
  }
  private function onTrace(evt:EventX):void{
   trace(evt);
   trace(evt.arg.a)
   trace(evt.arg.b)
  }
}
}

5、包含事件发送的类:B.as

package {
public class B {
  import flash.events.*
  public function B() {
   var dispatcher:EventDispatcher=DT.dispatcher;
   dispatcher.dispatchEvent(new EventX(EventX.RECEIVE_ARG,{a:"arg:a",b:"arg:b"}));
  }
}
}

//PS:上面所列出的就是一个简单的不同类间的事件广播与接收的例子(包含参数传递)

附件：DispatchEventDemo.rar