Flex调用swf内方法

原文见：http://blog.csdn.net/genius840215/archive /2010/03/25/5411732.aspx

一般我们生成的swf有3种，一种是Flex mxml主应用编译得到，第2种类是用Flex SDK编译as类得到，还有一个就是fla在Flash CS3内运行生成。

因为第3种的调用方法同第2种，这里就说明前2种swf在Flex项目内的应用。

HelloWorld1.mxm
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="absolute" >
<mx:Script>
<!--[CDATA[
public function sayHello():void{
trace("HelloWorld from mxml");
}
]]-->
</mx:Script>
</mx:Application>
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" > <mx:Script> <!--[CDATA[ public function sayHello():void{ trace("HelloWorld from mxml"); } ]]--> </mx:Script> </mx:Application>

HelloWorld2.as

package {
public class HellowWorld2{
public function sayHello(): void {
trace("HelloWorld from AS" );
}
}
}

app.mxml <? xml version = "1.0" encoding = "utf-8" ?>
< mx:Application xmlns:mx = "http://www.adobe.com/2006/mxml" layout = "absolute" >
< mx:Script >
<!--[CDATA[
public function CompleteHandler1(evt:Event):void{
Object(evt.target.content.application).sayHello(); //区别
}
public function CompleteHandler1(evt:Event):void{
Object(evt.target.content).sayHello(); 　　　　　　//区别
}
]]-->
</ mx:Script >
< SWFLoader id = "hw1" source = "HelloWorld1.swf" complete = "CompleteHandler1(event)" />
< SWFLoader id = "hw2" source = "HelloWorld2.swf" complete = "CompleteHandler2(event)" />
</ mx:Application >

<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" > <mx:Script> <!--[CDATA[ public function CompleteHandler1(evt:Event):void{ Object(evt.target.content.application).sayHello(); } public function CompleteHandler1(evt:Event):void{ Object(evt.target.content).sayHello(); } ]]--> </mx:Script> <SWFLoader id="hw1" source="HelloWorld1.swf" complete="CompleteHandler1(event)"/> <SWFLoader id="hw2" source="HelloWorld2.swf" complete="CompleteHandler2(event)"/> </mx:Application> HelloWorld1.mxml和HelloWorld2.as分别用Flex SDK编译成swf，然后在app.mxml内调试。

可以看出第一种情况生成的swf因为是通过mxml生成的，e.target.content其实是一个SystemManager类对象，必须要 通过它的application才能访问swf内部方法，而用as类直接生成的swf通过e.target.content就能直接访问。