AS3 调用外部SWF中元件库中的元件

一、目的

bb.swf的元件库中有一个元件，在aa.swf中调用这个元件，显示到舞台上

二、步骤

bb.swf

1.新建bb.fla，在上面画一个圆

2.选择这个圆，将其转换为元件，并选择"Export for ActionScript"，类名取为"Yuan"

3.在舞台上删除这个元件（删除后，只在元件库中有该元件）

4.Ctrl+Enter 运行bb.fla ， 生成bb.swf

aa.swf

1.新建aa.fla

2.在时间轴上加如下代码

var cl:ClassLoader = new ClassLoader("bb.swf"); //加载bb.swf文件

cl.addEventListener(Event.COMPLETE, cm_fun);

function cm_fun(e:Event){

var Yuan:Class = cl.getClass("Yuan") as Class;

var yuan:DisplayObject = new Yuan();

yuan.x = 50;

yuan.y = 100;

yuan.alpha = .5;

addChild(yuan);

}

三、类加载文件

package {

import flash.display.Loader;

import flash.net.URLRequest;

import flash.utils.ByteArray;

import flash.events.Event;

import flash.events.ProgressEvent;

import flash.events.EventDispatcher;

import flash.system.LoaderContext;

public class ClassLoader extends EventDispatcher{

public var url:String;

public var loader:Loader;

//构造函数

public function ClassLoader(obj:Object = null,lc:LoaderContext = null) {

if(obj != null){

if(obj is ByteArray){

loadBytes(obj as ByteArray,lc);

}else if(obj is String){

load(obj as String,lc);

}else{

throw new Error("参数错误，构造函数第一参数只接受ByteArray或String");

}

}

}

//加载

public function load(_url:String,lc:LoaderContext = null):void{

url = _url;

loader = new Loader;

loader.load(new URLRequest(url),lc);

addEvent();

}

//加载字节

public function loadBytes(bytes:ByteArray,lc:LoaderContext = null):void{

loader = new Loader;

loader.loadBytes(bytes,lc);

addEvent();

}

//开始侦听

private function addEvent():void{

loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,progressFun);

loader.contentLoaderInfo.addEventListener(Event.COMPLETE,completeFun);

}

//结束侦听

private function delEvent():void{

loader.contentLoaderInfo.removeEventListener(ProgressEvent.PROGRESS,progressFun);

loader.contentLoaderInfo.removeEventListener(Event.COMPLETE,completeFun);

}

//加载成功，发布成功事件

private function completeFun(e:Event):void {

delEvent();

dispatchEvent(e);

}

//加载过程

private function progressFun(e:ProgressEvent):void{

dispatchEvent(e);

}

//获取定义

public function getClass(className:String):Object {

return loader.contentLoaderInfo.applicationDomain.getDefinition(className);

}

//是否含有该定义

public function hasClass(className:String):Boolean {

return loader.contentLoaderInfo.applicationDomain.hasDefinition(className);

}

//清除

public function clear():void{

loader.unload();

loader = null;

}

}

}

参考文章： http://www.blueidea.com/tech/multimedia/2008/5842_2.asp