As3.0 xml + Loader

其实很简单是两部分组成的，只是两个MC，rejigger_mc和loadPic_mc，前者是负责加载XML以及如何显示图片的整个SWF的主干，而后者只是为了加载图片显示进度的一个小零件。
以前2.0时，我把代码分别写在rejigger_mc和loadPic_mc的时间轴上，然后在rejigger_mc里黏贴N多个loadPic_mc，可现在不行啦，他们不让我那么做，我只好把代码写在两个rejigger_mc.as和loadPic_mc.as外部文件里。
注：这些文件的布局如下，文件夹ActionScript里含rejigger_mc.as和loadPic_mc.as

首先是loadPic_mc.as文件,
代码:
package ActionScript{//包是什么，我的理解它就是文件夹，不就是为了完全限定名称吗
    import flash.net.URLRequest;
    import flash.display.Loader;
    import flash.events.*;
    import flash.display.MovieClip;
    import flash.text.TextField;
    import fl.transitions.Tween;
    import fl.transitions.easing.Back;
    import fl.transitions.TweenEvent;
//变了啊，真的变了，现在用什么东西都得冲人家张口借，尽管是免费的，我曾经偷//偷地在所关联的MC里放了一个文本框，结果还是被发现了，你说我和FLASH打//了多少年的交道，多多少少有点感情吧？？，最后我不得不import flash.text.TextField;

    public class loadPic_mc extends MovieClip {
        //类名原来就是脚本文件名
        public var fun:Function;
        //定义了一个属性他的再次出现在最后一行
        private var per_txt:TextField;
        //显示加载进度
        private var loadPic:Loader;
        private var dispatcher:IEventDispatcher;
        //上面的这些变量曾经我是声明在主时间轴的最顶端的
        public function loadPic_mc(str:String):void {//构造函数，现在完全多了个这个东东，据我观察，当你声明一个类时，不管你愿不愿意它都会执行这个函数
            var request:URLRequest=new URLRequest(str);
            loadPic=new Loader();

            dispatcher=loadPic.contentLoaderInfo;
            dispatcher.addEventListener(Event.COMPLETE,loadComH);
            dispatcher.addEventListener(Event.OPEN,loadOpenH);
            dispatcher.addEventListener(ProgressEvent.PROGRESS,loadProgH);
            //订阅事件呢
            loadPic.load(request);
            //一个载入多写了几行，要是从3.0转型到2.0那该多快
            

            per_txt=new TextField();
            per_txt.x=10;
            per_txt.y=55;
            per_txt.width=150;
            per_txt.textColor=0xB3CCCC;
            this.motionLoad_mc.visible=false;
//在loadPic_mc的舞台上所含的一个MC，有时间轴的
            this.addChild(loadPic);
            //曾经用this指东指西的，现在呢，不能再乱指了，只能指本类,
            this.addChild(per_txt);
        }
        private function loadOpenH(event:Event):void {
            this.motionLoad_mc.visible=true;
            per_txt.text="正在载入。。。。";
            loadPic.alpha=0;
            //开始下载时调度
        }
        private function loadProgH(event:ProgressEvent):void {
            per_txt.text="已载入。。。。"+uint(event.bytesLoaded/event.bytesTotal*100)+"%";
            //下载过程中调度

        }
        private function loadComH(event:Event):void {
            var aTween:Tween = new Tween( loadPic, "alpha", Back.easeOut,0, 1, 2, true);
             aTween.addEventListener(TweenEvent.MOTION_FINISH,disPic);
            //其实完全没必要订阅这个事件，只是想联系一下Tween类
            this.removeChild(this.motionLoad_mc);
            this.removeChild(per_txt);
            //显示对象很帅吧以后就再也不要_mc[newmc+”I”]去找对象了

            dispatcher.removeEventListener(Event.COMPLETE,loadComH);
            dispatcher.removeEventListener(Event.OPEN,loadOpenH);
            dispatcher.removeEventListener(ProgressEvent.PROGRESS,loadProgH);
            //清除监听，便于处理垃圾
        }
        private function disPic(event:TweenEvent){
            fun();
            //调用函数fun
        }
    }
}
//写完此类了  其实3.0语言一看很有层次感的，8错8错

下面在库里找到loadPic_mc  右键 –链接 类里填入：ActionScript.loadPic_mc
注: loadPic_mc里只含一个元件motionLoad_mc
接下来编写类rejigger_mc.as
代码:
package ActionScript{
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.events.*;

    import flash.display.SimpleButton;
    import flash.display.Sprite;
    import fl.transitions.Tween;
    import fl.transitions.easing.Back;
    import ActionScript.loadPic_mc;

    public class rejigger_mc extends Sprite {
        private var sprite:Sprite;
        private var portraitXml:XML;
        private var loadXml:URLLoader;
        private var dispatcher:IEventDispatcher;
        private var i:uint;
        private var len:uint;
        private var m:uint;
        //这些属性都是私有的从此类外部是无法访问的


        public function rejigger_mc():void {
            var request:URLRequest=new URLRequest("portrait.xml");
            loadXml=new URLLoader(request);
            //载入外部XML文件
            loadXml.addEventListener(Event.COMPLETE,comH);

        }

        private function comH(event:Event) {
            portraitXml=new XML(event.target.data);
            sprite=new Sprite();
            //这个其实就是装loadPic_mc的容器
            sprite.x=10;
            sprite.y=10;
            this.addChild(sprite);
            var maskSprite:Sprite=new Sprite();
            //只是为了遮盖 所以不必添加到显示列表中
            maskSprite.graphics.beginFill(0xffffff);
            maskSprite.graphics.drawRect(10,10,150,80);
            maskSprite.graphics.endFill();
            sprite.mask=maskSprite;

            this.right_btn.addEventListener(MouseEvent.CLICK,moveRight);
            this.left_btn.addEventListener(MouseEvent.CLICK,moveLeft);
            //又该订阅事件了
            i=0;
            len=0;
            for (var item:String in portraitXml.part) {
                len++;
                //不知道怎么取得XML子节点的长度，要是转换为XML文档类的话觉得很麻烦
            }
            loadPor();

            loadXml.removeEventListener(Event.COMPLETE,comH);
            //卸载监听
        }
        private function loadPor():void {
            if (i<len) {
                var loadPic:loadPic_mc=new loadPic_mc(portraitXml.part{i}.@path);//基于发布系统的问题,此处的大括号需要换为中括号.
                loadPic.fun=loadPor;
                sprite.addChild(loadPic);
                //在sprite里添加显示对象loadPic
                loadPic.x=i*150;

                i++;
            } else {
                return;
            }
        }
        private function moveRight(event:MouseEvent) {
            if (m>0) {
                m--;
                var aTween:Tween = new Tween( sprite, "x", Back.easeOut, sprite.x, 10-m*150, 1, true);
                //移动是直接移动sprite，因为sprite里含N多个loadPic
            } else {
                return;
            }
        }
        private function moveLeft(event:MouseEvent) {
            if (m<len-1) {
                m++;
                var aTween:Tween = new Tween( sprite, "x", Back.easeOut, sprite.x, 10-m*150, 1, true);
            } else {
                return;
            }
        }
    }
}
在库里找到rejigger_mc  右键 –链接 类里填入：ActionScript. rejigger_mc
基类可以写成flash.display.Sprite  因为这个类扩展的是Sprite类
注：rejigger_mc里只含两个元件   都是按钮

最后一步，是在主时间上写上代码如下：
代码:
this.stage.frameRate=31;
this.stage.scaleMode=StageScaleMode.NO_SCALE;
this.stage.align=StageAlign.TOP_LEFT;


import ActionScript.rejigger_mc;
var myrejigger:rejigger_mc=new rejigger_mc();
addChild(myrejigger);
好了,导出去测试一下。