我们做项目的时候，有时候就因为load的异步郁闷。as3也没有其他语言里边的sleep。要想不烦恼，不郁闷，怎么办呢。那我们就将用一定的途径来实现。既然我们load的东西，都在load里边。那么我们只要将load添加到显示列表不就完事了。特别对于加载图片最有效果。如果加载的是swf动画，要让swf播放怎么办呢。那就在你获得loader后，就用一个时间侦听来观察loader的content对象或contentLoaderInfo.content对象。如果其不为null，那么就说明你之前load的对象已经load完毕了。这个时候你就可以用它了，让它播放吧。
as_code:

View Code 

package com.vini123
{

    import flash.display.Sprite;
    import flash.display.Loader;
    import flash.net.URLRequest;
    import flash.events.Event;
    import flash.events.TimerEvent;
    import flash.utils.Timer;
    import flash.display.MovieClip;
    import flash.system.System;
    import flash.events.MouseEvent;

    import com.vini123.utils.ViniBtn;

    public class Main extends Sprite
    {
        private var myLoader:Loader;
        private var myTimer:Timer;
        private var testLoader:Loader;
        private var tempNum:int = 0;
        private var btnArr:Array = ["添加SWF","删除SWF"];
        private var allBtn:Vector.<ViniBtn>=new Vector.<ViniBtn>();
        
        public function Main()
        {
            myTimer = new Timer(1000,0);
            myTimer.addEventListener(TimerEvent.TIMER,timerHandler);

            for (var i:int=0; i<btnArr.length; i++)
            {
                allBtn.push(new ViniBtn(btnArr[i]));
                allBtn[i].buttonMode = true;
                allBtn[i].addEventListener(MouseEvent.ROLL_OVER,overHandler);
                allBtn[i].addEventListener(MouseEvent.ROLL_OUT,outHandler);
                allBtn[i].addEventListener(MouseEvent.CLICK,clickHandler);
                trace(allBtn[i].width);
                allBtn[i].x =10
                allBtn[i].y = 5
                allBtn[i].id = i;
                addChild(allBtn[i]);
            }
            allBtn[1].visible = false;
        }

        private function overHandler(e:MouseEvent)
        {
            e.currentTarget.overHandler();
        }

        private function outHandler(e:MouseEvent)
        {
            e.currentTarget.outHandler();
        }

        private function clickHandler(e:MouseEvent)
        {
            switch (e.currentTarget.id)
            {
                case 0 :
                    allBtn[0].visible = false;
                    allBtn[1].visible = true;
                    getLoader();
                    break;
                case 1 :
                    allBtn[0].visible = true;
                    allBtn[1].visible = false;
                    removeLoader();
                    break;
            }
        }

        private function getSwf(url:String):Loader
        {
            if (myLoader==null)
            {
                myLoader=new Loader();
            }
            var i:int=0;
            myLoader.contentLoaderInfo.addEventListener(Event.COMPLETE,completeHandler);
            myLoader.load(new URLRequest(url));
            return myLoader;
        }

        private function completeHandler(e:Event)
        {
            trace("加载结束！！");
        }
        private function timerHandler(e:TimerEvent)
        {
            
            var num1:Number=System.freeMemory/(1024*1024);
            var num2:Number=System.totalMemoryNumber/(1024*1024);
            var num3:Number=System.totalMemory/(1024*1024);
            var num4:Number=System.privateMemory/(1024*1024);
            trace(num1,num2,num3,num4);
            if (testLoader!=null)
            {
                echo();
                if (testLoader.contentLoaderInfo.content != null)
                {
                    tempNum++;
                    if (tempNum>(testLoader.contentLoaderInfo.content as MovieClip).totalFrames)
                    {
                        tempNum = 1;
                    }
                    (testLoader.contentLoaderInfo.content as MovieClip).gotoAndStop(tempNum);
                }
            }
        }

        private function getLoader()
        {
            tempNum = 0;
            testLoader = getSwf("木兰花.swf");
            addChild(testLoader);
            myLoader.unload();
            myLoader = null;
            myTimer.start();
            echo();
        }

        private function removeLoader()
        {
            removeChild(testLoader);
            testLoader = null;
            myTimer.stop();
        }

        private function echo()
        {
            if (testLoader!=null)
            {
                trace(testLoader);
                trace(testLoader.content);
                trace(testLoader.contentLoaderInfo);
                trace(testLoader.contentLoaderInfo.content);
                trace("_________________");
            }
        }

    }
}

 

View Code 

package com.vini123.utils
{
    import flash.display.Sprite;
    import flash.text.TextField;
    import flash.text.TextFormat;
    import flash.text.TextFieldAutoSize;
    
    public class ViniBtn extends Sprite
    {

        private var sp:Sprite = new Sprite  ;
        private var myTxtFormat:TextFormat = new TextFormat  ;
        private var txt:TextField = new TextField  ;
        private var xGap:int = 10;
        private var yGap:int = 6;
        public var id:int = 0;
        
        public function ViniBtn(str:String="")
        {
            createBtn(str);
        }

        private function createBtn(str:String)
        {
            myTxtFormat.font = "黑体";
            myTxtFormat.bold = false;
            myTxtFormat.size = 13;
            myTxtFormat.color = 0x000000;
            txt.text = str;
            txt.x = xGap * 0.5 - 2;
            txt.y = yGap * 0.5 - 1;
            txt.mouseEnabled = false;
            txt.autoSize=TextFieldAutoSize.LEFT;
            txt.setTextFormat(myTxtFormat);

            sp.graphics.lineStyle(2,0x00ffff,0.8);
            sp.graphics.beginFill(0xffffff,1);
            sp.graphics.drawRoundRect(0,0,txt.textWidth + xGap,txt.textHeight + yGap,8,8);
            sp.graphics.endFill();
            addChild(sp);
            sp.addChild(txt);
        }

        public function overHandler()
        {
            myTxtFormat.color = 0x00ffff;
            txt.setTextFormat(myTxtFormat);
        }

        public function outHandler()
        {
            myTxtFormat.color = 0x000000;
            txt.setTextFormat(myTxtFormat);
        }
    }
}