swf之间的交互（上）全局变量VS全局派发事件

1全局变量：

通过定义一个全局的类里面定义静态变量用来存储swf1中要传给swf2的参数值，swf2通过读取静态变量中的值来获取swf1中传过来的值。。。。。。。这个很好理解就不多说了。

2全局派发（以一个demo来说明）

----自定义一个事件（注意继承自Event）给他一个私有变量用来存储传递的参数（当然根据情况可以多个）

package event
{
    import flash.events.Event;
    
    public class MessageEvent extends Event
    {
        private var msg:String;
        public function MessageEvent(msg:String,type:String, bubbles:Boolean=false, cancelable:Boolean=false)
        {
            super(type, bubbles, cancelable);
            this.msg=msg;
        }
        public function getmessage():String
        {
            return msg;
        }
    }
}

....创建一个全局派发类继承自EventDispatcher(使用单例模式提高效率，便于管理)

package event
{
    import flash.events.EventDispatcher;
    import flash.events.IEventDispatcher;
    
    public class MessageDispatch extends EventDispatcher
    {
        private static var instance:MessageDispatch;
        public function MessageDispatch(target:IEventDispatcher=null)
        {
            super(target);
        }
        public static function getInstance():MessageDispatch
        {
            if(instance==null)
            {
                instance=new MessageDispatch();
            }
            return instance;
        }
        
        public var msg:String
    }
}

...实现

swf1:left.swf

<?xml version="1.0" encoding="utf-8"?>
<s:Panel xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/mx"
          height="300" width="300">
    <s:layout>
        <s:BasicLayout/>
    </s:layout>

    <fx:Script>
        <![CDATA[
            import event.MessageDispatch;
            import event.MessageEvent;
            protected function button1_clickHandler(event:MouseEvent):void
            {
                MessageDispatch.getInstance().dispatchEvent(new MessageEvent(t.text,"sent"));
                MessageDispatch.getInstance().msg=t.text;
            }
        ]]>
    </fx:Script>

    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
    </fx:Declarations>
    <s:TextArea x="10" y="10" width="277" height="218" id="t"/>
    <s:Button x="218" y="236" label="按钮" click="button1_clickHandler(event)"/>
</s:Panel>

 swf2:right.swf

<?xml version="1.0" encoding="utf-8"?>
<s:Panel xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/mx"
          creationComplete="panel1_creationCompleteHandler(event)"
           height="300" width="300">
    <s:layout>
        <s:BasicLayout/>
    </s:layout>
    <fx:Script>
        <![CDATA[
            import event.MessageDispatch;
            import event.MessageEvent;
            
            import mx.events.FlexEvent;

            protected function panel1_creationCompleteHandler(event:FlexEvent):void
            {
                MessageDispatch.getInstance().addEventListener("send",setMsg);
            }
            
            private function setMsg(e:MessageEvent):void
            {
                txt.text=e.getmessage();
            }

        ]]>
    </fx:Script>
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
    </fx:Declarations>
    <s:TextArea x="10" y="10" width="278" height="247" id="txt"/>
</s:Panel>

主工程

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" xmlns:local="*">
    <fx:Declarations>
        <!-- 将非可视元素（例如服务、值对象）放在此处 -->
    </fx:Declarations>
    <local:left x="0" y="1" height="300">
    </local:left>
    <local:right x="308" y="-1">
    </local:right>
</s:Application>

待续。。。。。。。。。。。。。。。。。