as3项目要调用外部swf里的类有3种方法：
1.将外部的swf发布为swc，使用时将swc引用添加到相应的项目中，这应该是最简单的一种引用。不过当项目中的类或组件比较多时就会使项目发布生成的swf文件大小过大;
2.通过资源绑定外部的，然后直接通过类名获取。如：[Embed(source="assets/icon/skin.swf",symbol="Btn_Max")],这种方法也会引起swf文件过大;
3.通过域来来获取外部swf里的绑定类，这种方法可以在需要用时才去加载相应的swf文件然后再获取所需要的类。
下面是根据第三种方法来获取所需要的类：
package com.mobiano.flipbook.pageeditor
{
import com.flasht.tui.display.TArrow;
import com.mobiano.flipbook.config.FlipBookConfig;
import com.tflash.Components.util.SWFLoader;
import flash.display.DisplayObject;
import flash.errors.IOError;
import flash.events.Event;
import flash.events.IOErrorEvent;
import flash.events.ProgressEvent;
import flash.utils.Dictionary;
public class PlugInManager
{
public static var allExternalClass:Object={};
//public var loadingQueue:Object={};
//public var swfLoader:SWFLoader;
public var loadingQueue:Dictionary=new Dictionary();
private static var canInstace:Boolean=false;
private static var instace:PlugInManager;
private var filePrefix:String="./files/pageConfig/";
private var fileSuffix:String=".swf";
public function PlugInManager()
{
if(!canInstace){
throw new Error("Can't new PlugInManager");
}
}
public static function getInstace():PlugInManager{
if(instace==null){
canInstace=true;
instace=new PlugInManager();
canInstace=false;
}
return instace;
}
public function getComponent(target:TAnnoPlugIn,cpName:String,extClassName:String):void{
if(cpName==null||cpName.length<1||extClassName==null||extClassName.length<1)return ;
if(allExternalClass.hasOwnProperty()){
//return allExternalClass[cpName];
var swfLoader:SWFLoader=allExternalClass[cpName];
var cl:Class=swfLoader.GetClass(extClassName);
if(cl!=null){
var extObj:IPlugInInterface=createSWFClass(cl);
if(extObj!=null){
target.extObj=extObj;
}
}
}else{
load(target,cpName,extClassName);
}
//return null;
}
public function getSwfUrl(cpName):String{
if(cpName!=null){
return filePrefix+cpName+fileSuffix;
}
return null;
}
protected function getURLFrom(url:String):String{
return com.mobiano.flipbook.config.FlipBookConfig.getURLForm(url);
}
private function load(target:TAnnoPlugIn,cpName:String,extClName:String):void{
var swfUrl:String=getSwfUrl(cpName);
if(swfUrl==null||swfUrl.length<1)return;
swfUrl=getURLFrom(swfUrl);
var swfLoader:SWFLoader=new SWFLoader(swfUrl);
swfLoader.addEventListener(Event.COMPLETE,onComplete);
swfLoader.addEventListener(ProgressEvent.PROGRESS,onProgress);
swfLoader.addEventListener(IOErrorEvent.IO_ERROR,onIOError);
var obj:Object={target:target,compontName:cpName,extClassName:extClName};
//loadingQueue[cpName]=obj;
loadingQueue[swfLoader]=obj;
swfLoader.Load();
}
private function onComplete(evt:Event):void{
trace(evt.currentTarget);
if(evt.currentTarget is SWFLoader){
var loader:SWFLoader=evt.currentTarget as SWFLoader;
if(loader in loadingQueue){
var obj:Object=loadingQueue[loader];
if(obj["target"]&&obj["compontName"]&&obj["extClassName"]){
var cpName:String=obj["compontName"];
var extClassName:String=obj["extClassName"];
allExternalClass[cpName]=loader;
var cl:Class=loader.GetClass(extClassName);
var target:TAnnoPlugIn=obj["target"];
if(cl!=null){
//allExternalClass[cpName]=cl;
var extObj:IPlugInInterface=createSWFClass(cl);
if(extObj!=null){
target.extObj=extObj;
}
}
}
//loader.GetClass(
//var target:TAnnoPlugIn=loadingQueue[loader];
}
}
}
private function createSWFClass(cl:Class):IPlugInInterface{
var extObj:IPlugInInterface;
try{
if(cl!=null){
extObj=new cl();
}
}catch(e:Error){
return null;
}
return extObj;
}
private function onProgress(evt:ProgressEvent):void{
}
private function onIOError(evt:IOError):void{
throw new Error("Load swf error:"+evt);
}
}
}
package com.tflash.Components.util
{
import flash.display.DisplayObject;
import flash.display.Loader;
import flash.display.LoaderInfo;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.events.IEventDispatcher;
import flash.events.IOErrorEvent;
import flash.events.ProgressEvent;
import flash.net.URLRequest;
import flash.system.ApplicationDomain;
import flash.system.LoaderContext;
[Event(name="complete", type="flash.events.Event")]
[Event(name="progress",type="flash.events.ProgressEvent")]
[Event(name="io_error",type="flash.events.IOErrorEvent")]
public class SWFLoader extends EventDispatcher
{
private var loader:Loader;
private var content:DisplayObject;
private var loadComplete:Boolean=false;
private var url:String;
public function SWFLoader(url:String)
{
this.url=url;
}
public function Load(url:String=null):void{
if(url!=null){
this.url=url;
}
loadComplete=false;
if(loader==null){
loader=new Loader();
}else{
loader.unloadAndStop(true);
if(loader.contentLoaderInfo.hasEventListener(Event.COMPLETE)){
loader.contentLoaderInfo.removeEventListener(Event.COMPLETE,onLoadComplete);
}
if(loader.contentLoaderInfo.hasEventListener(ProgressEvent.PROGRESS)){
loader.contentLoaderInfo.removeEventListener(IOErrorEvent.IO_ERROR,onLoadIOError);
}
if(loader.contentLoaderInfo.hasEventListener(IOErrorEvent.IO_ERROR)){
loader.contentLoaderInfo.removeEventListener(IOErrorEvent.IO_ERROR,onLoadIOError)
}
}
var context:LoaderContext=new LoaderContext();
context.applicationDomain=new ApplicationDomain(ApplicationDomain.currentDomain);
var request:URLRequest=new URLRequest(this.url);
loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onLoadComplete);
loader.contentLoaderInfo.addEventListener(ProgressEvent.PROGRESS,onLoadProgress);
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR,onLoadIOError);
loader.load(request,context);
}
private function onLoadProgress(evt:ProgressEvent):void{
this.dispatchEvent(evt);
}
private function onLoadComplete(evt:Event):void{
evt.currentTarget.removeEventListener(Event.COMPLETE,onLoadComplete);
evt.currentTarget.removeEventListener(IOErrorEvent.IO_ERROR,onLoadIOError);
evt.currentTarget.removeEventListener(IOErrorEvent.IO_ERROR,onLoadIOError);
content=(evt.currentTarget as LoaderInfo).content;
loadComplete=true;
this.dispatchEvent(new Event(Event.COMPLETE));
}
private function onLoadIOError(evt:IOErrorEvent):void{
evt.currentTarget.removeEventListener(Event.COMPLETE,onLoadComplete);
evt.currentTarget.removeEventListener(IOErrorEvent.IO_ERROR,onLoadIOError);
evt.currentTarget.removeEventListener(IOErrorEvent.IO_ERROR,onLoadIOError);
this.dispatchEvent(evt);
}
/**
* 获取当前ApplicationDomain内的类定义
*
* name类名称，必须包含完整的命名空间,如 Grave.Function.SWFLoader
* info加载swf的LoadInfo，不指定则从当前域获取
* return获取的类定义，如果不存在返回null
*/
public function GetClass(name:String):Class{
if(loadComplete&&loader!=null){
if(loader.contentLoaderInfo.applicationDomain.hasDefinition(name)){
return loader.contentLoaderInfo.applicationDomain.getDefinition(name) as Class;
}else{
return null;
}
}
return null;
}
public function GetContent():DisplayObject{
return content;
}
public function GetLoader():Loader{
return loader;
}
}
}