Flex事件机制学习-SWF间共享事件实现通信

来源：互联网发布：成都思迅软件编辑：程序博客网时间：2024/06/04 21:50

两个SWF间共享事件，那末这两个SWF就可以通过共享事件通信，例子是改动网上的，例如：

public class Main extends Sprite
{

public var shared:EventDispatcher;

public function Main()
{

var loader:Loader = new Loader();
shared = loader.contentLoaderInfo.sharedEvents;

   shared.addEventListener("fromChild", fromChild);

   var url:String = "http://localhost:9080/lcds/Flex3007/Child.swf";
   loader.load(new URLRequest(url));
   addChild(loader);
  }

  private function fromChild(event:TextEvent):void {
            trace(event.text); // Good day
             var replyMessage:TextEvent = new TextEvent("fromParent");
            replyMessage.text = "Same to you";
            shared.dispatchEvent(replyMessage);
   }
}

这个是使用contentLoaderInfo的属性sharedEvents，该EventDispatcher可用于跨安全边界交换事件，从而达到通信的目地；

http://localhost:9080/lcds/Flex3007/Child.swf

public class Child extends Sprite
{
  public function Child()
  {
   var shared:EventDispatcher = loaderInfo.sharedEvents;
   shared.addEventListener("fromParent", fromParent);

   var firstMessage:TextEvent = new TextEvent("fromChild");
   firstMessage.text = "Good Day";

   //child实例时，抛出事件信息“Good Day”
   shared.dispatchEvent(firstMessage);
  }

   public function fromParent(event:TextEvent):void {
                trace(event.text); // Same to you
                var label01:TextField=new TextField();
               label01.text=event.text;
               addChild(label01);
     }
}

运行：