Flex调用swf内方法

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

1. 1. 
      
2. <?xml version="1.0" encoding="utf-8"?>
3. <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
4. layout="absolute" >
5. <mx:Script>
6. <!--[CDATA[
7. public function sayHello():void{
8. trace("HelloWorld from mxml");
9. }
10. ]]-->
11. </mx:Script>
12. </mx:Application>
    1. 
       

<?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

1. 1. 
      
2. package {  
3.     public   class  HellowWorld2{  
4.         public   function  sayHello(): void {  
5.             trace("HelloWorld from AS" );  
6.         }  
7.     }  
8. }
   1. 
      

app.mxml

1. 1. 
      
2. <? xml   version = "1.0"   encoding = "utf-8" ?>   
3. < mx:Application   xmlns:mx = "http://www.adobe.com/2006/mxml"    layout = "absolute"   >   
4.     < mx:Script >   
5.         <!--[CDATA[  
6.             public function CompleteHandler1(evt:Event):void{  
7.                 Object(evt.target.content.application).sayHello();   //区别         
8.             }  
9.             public function CompleteHandler1(evt:Event):void{  
10.                 Object(evt.target.content).sayHello();   　　　　　　//区别
11.             }  
12.         ]]-->   
13.     </ mx:Script >   
14.     < SWFLoader   id = "hw1"   source = "HelloWorld1.swf"   complete = "CompleteHandler1(event)" />   
15.     < SWFLoader   id = "hw2"   source = "HelloWorld2.swf"   complete = "CompleteHandler2(event)" />   
16. </ mx:Application >   
    1. 
       

<?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。