as3 project 自身加载

as3 project里面并没有提供时间轴，如何像做flash程序那样把各种资源编译到我们想要的帧里面呢。as3已经提供了一个matatag标记来处理这件事。

假设我们建立了一个as project项目FactoryClassTest。

以下为这个项目的文档类FactoryClassTest

package{import flash.display.Sprite;import mx.core.BitmapAsset;[Frame(factoryClass="loader.Preloader")][SWF(width="780",height="600",backgroundColor="#ffffff",rate="20")]public class FactoryClassTest extends Sprite{public function FactoryClassTest(){createChildren();}private function createChildren():void{var pic:BitmapAsset = new abc() as BitmapAsset ;this.addChild(pic);}[Embed(source="test.jpg")] /** * 随便嵌入一个音乐增加体积. */private var abc:Class;}}  

可以注意到里面使用了一个元标签

[Frame(factoryClass="loader.Preloader")]

 

这个标签意味着要使用loader包下面的Preloader类作为第一帧加载的类，而把真正的主程序放置在了这帧之后来加载。下面我们来看Preloader类

 

package loader{import flash.display.DisplayObject;import flash.display.LoaderInfo;import flash.display.MovieClip;import flash.display.Shape;import flash.events.Event;import flash.events.ProgressEvent;import flash.system.ApplicationDomain;import flash.text.TextField;import flash.utils.getDefinitionByName;public class Preloader extends MovieClip{public function Preloader(){super();createChildren();init();}private function init():void{addEventListener(Event.ADDED_TO_STAGE,added,false,0,true);added(null);}private var tf:TextField;private var progressBar:Shape;private function createChildren():void{tf = new TextField();tf.width = 200;tf.height = 100;tf.text = "";addChild(tf);progressBar = new Shape();addChild(progressBar);with(progressBar.graphics){beginFill(Math.random() * 0xFFFFFF);drawRect(0,0,100,5);}//trace(this.stage == parent);}private function added(evt:Event = null):void{var loaderInfo:LoaderInfo;if(stage){removeEventListener(Event.ADDED_TO_STAGE,added);loaderInfo = root.loaderInfo;loaderInfo.addEventListener(ProgressEvent.PROGRESS , progress,false,0,true);loaderInfo.addEventListener(Event.COMPLETE,complete,false,0,true);addEventListener(Event.ENTER_FRAME ,enterFrame,false,0,true);progressBar.x = (stage.stageWidth - 100 ) / 2 ;progressBar.y = (stage.stageHeight - progressBar.height ) / 2 ;tf.x = progressBar.x ;tf.y = progressBar.y + progressBar.height + 5 ;//trace(this);}}private function progress(evt:ProgressEvent):void{//trace(evt);//tf.appendText( "/nProgressEvent = " + evt.toString());}private function complete(evt:Event):void{//trace(evt);}private var count:int = 0 ;private function enterFrame(evt:Event):void{progressBar.width = root.loaderInfo.bytesLoaded / root.loaderInfo.bytesTotal * 200 ;tf.text = "当前已加载:"+root.loaderInfo.bytesLoaded.toString() + "/n总字节数:"+ root.loaderInfo.bytesTotal.toString() + "/n已经过帧数: " + ++count//trace(root.loaderInfo.bytesLoaded,root.loaderInfo.bytesTotal,count ++);//tf.appendText ( "/n当前已加载"+root.loaderInfo.bytesLoaded.toString() + "/n总字节数"+ root.loaderInfo.bytesTotal.toString() + "/nEnterFrame = " + count);var clazz:Class ;if(ApplicationDomain.currentDomain.hasDefinition("FactoryClassTest")){clazz = getDefinitionByName("FactoryClassTest") as Class;main = new clazz();stage.addChildAt(main,0);//stage.removeChild(this);removeEventListener(Event.ENTER_FRAME,enterFrame);}var main:DisplayObject;}}}

 

请注意这里一定要继承MovieClip。

 

编译好程序把bin-debug文件夹下的

AC_OETags.js

FactoryClassTest.html

FactoryClassTest.swf

 

拷贝到web目录下，访问FactoryClassTest.html就好了。

奇怪的是不能直接访问FactoryClassTest.swf，这点暂时还未搞明白。