视频和swf的相对路径加载，卸载

package com{
    import flash.display.MovieClip;
    import flash.net.NetConnection;
    import flash.net.NetStream;
    import flash.events.AsyncErrorEvent;
    import flash.events.MouseEvent;
    import flash.media.Video;
    import flash.display.SimpleButton;
    import flash.events.Event;
    import flash.display.Loader;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.utils.Timer;
    import flash.events.TimerEvent;
    import flash.system.fscommand;
    import flash.media.SoundMixer;
    import flash.media.SoundTransform;
    import flash.display.Stage;
    import flash.geom.Rectangle;

    public class MainLoader extends MovieClip {

        public static var nc:NetConnection;
        public static var ns:NetStream;
        public static var vid:Video;
        public static var emptyMc:MovieClip;
        public static var vidTotalTime:Number;
        public static var vidNowTime:Number;
        public static var obj:Object =new Object ();

        public static var videoPath:String;
        public static var vidProgressNum:Number;

        public static var soundTF:SoundTransform;

        public static var loader:Loader;
        public static var urlR:URLRequest;
        public static var backBtn:SimpleButton;
        public static var timer:Timer=new Timer(25);
        public static var thisMc:MovieClip;
        public static var stageMc:Stage;

        //视频====================================================================================================
        public function MainLoader(_thisMc:MovieClip ,_stageMc:Stage) {
            thisMc=_thisMc;
            stageMc=_stageMc;
        }
        public function vidFun() {
            nc= new NetConnection();
            nc.connect(null);
            ns=new NetStream(nc);
            ns.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
            ns.close();
            vid=new Video(1920,1080);
            function asyncErrorHandler(event:AsyncErrorEvent ):void {
                // 忽略错误
            }
            //vid.x=167.25;
            //vid.y=92.45;
            obj.onMetaData=onMetaData;
            ns.client=obj;
            function onMetaData(data:Object):void {
                vidTotalTime=data.duration;
            }
            vid.attachNetStream(ns);
            ns.pause();
            vid.smoothing=true;
        }

        //加载====================================================================================================

        public static function addMP4(str:String,_emptyMc:MovieClip,num:Number ) {
            emptyMc=_emptyMc;

            var string=stageMc.loaderInfo.url;
            var str1:int=string.lastIndexOf("/");
            var str2:String=string.slice(0,str1+1);
            ns.play(str2+"vid/"+str+".mp4");
            emptyMc.addChildAt(vid,num);
            if (timer.hasEventListener(TimerEvent.TIMER)==false) {
                timer.addEventListener(TimerEvent.TIMER,timerFun);
                timer.start();
            }
        }

        public static function timerFun(e:TimerEvent) {
            vidNowTime=ns.time;
            dragMc.x=int(lineMc.width*vidNowTime/vidTotalTime)+lineMc.x;
            var i:int=vidNowTime*lineMc.totalFrames/vidTotalTime;
            lineMc.gotoAndStop(i);
            if (vidTotalTime-vidNowTime<0.05||emptyMc.numChildren==0) {
                timer.removeEventListener(TimerEvent.TIMER,timerFun);
                ns.pause();
            }
        }

        //卸载====================================================================================================
        public static function removeMP4() {
            if (ns.time!=0) {
                ns.close();
                emptyMc.removeChild(vid);
                timer.removeEventListener(TimerEvent.TIMER,timerFun);
            }
        }

        //加载swf======================================================================================================

        public static function addSwf(swfStr:String,_emptyMc:MovieClip,num:Number ) {
            emptyMc=_emptyMc;
            removeMP4();
            if (emptyMc.numChildren!=0) {
                loader.unloadAndStop();
                while (emptyMc.numChildren>0) {
                    emptyMc.removeChildAt(0);
                }
            }
            if (emptyMc.numChildren==0) {

                var string=stageMc.loaderInfo.url;
                var str1:int=string.lastIndexOf("/");
                var str2:String=string.slice(0,str1+1);

                loader= new Loader();
                urlR = new URLRequest(str2+swfStr+".swf");
                loader.load(urlR);
                emptyMc.addChildAt(loader,num);

                //var loaderContent=loader.content;
                //trace(loaderContent.totalFrames)
                //loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onLoader);
            }

        }

/*        public static function onLoader(e:Event) {
            loader.contentLoaderInfo.removeEventListener(Event.COMPLETE,onLoader);
            emptyMc.addChildAt(loader,0);
        }*/
        public static function removeSwf() {
            if (emptyMc.numChildren!=0) {
                loader.unloadAndStop();
                while (emptyMc.numChildren>0) {
                    emptyMc.removeChildAt(0);
                }
            }
        }

        //清空emptyMc
        public static function clearEmpty() {
            if (ns.time!=0) {
                ns.close();
                emptyMc.removeChild(vid);
            }
            if (emptyMc.numChildren!=0) {
                loader.unloadAndStop();
                while (emptyMc.numChildren>0) {
                    emptyMc.removeChildAt(0);
                }
            }
        }

        public static var lineMcWidth:Number;
        public static var lineMcX:Number;
        public static var mcN:uint;
        public static var bounds:Rectangle;

        public static var dragMc:MovieClip;
        public static var lineMc:MovieClip;
        public static function FlvFun(_dragMc:MovieClip ,_lineMc:MovieClip ,_stageMc:Stage ) {

            dragMc=_dragMc;
            lineMc=_lineMc;
            stageMc=_stageMc;
            lineMc.stop();
            dragMc.x=lineMc.x;
            dragMc.y=lineMc.y;
            lineMcX=lineMc.x;
            bounds=new Rectangle(lineMc.x,lineMc.y,lineMc.width,0);

            dragMc.buttonMode=true;
            dragMc.addEventListener(MouseEvent.MOUSE_DOWN,dragFun);
            dragMc.addEventListener(MouseEvent.MOUSE_UP,dragFun);
            stageMc.addEventListener(MouseEvent.MOUSE_UP,dragFun);

        }
        public static function dragFun(e:MouseEvent):void {
            if (e.type=="mouseDown") {
                e.target.startDrag(false,bounds);
                dragMc.addEventListener(MouseEvent.MOUSE_MOVE,dragFun);
                timer.stop();
            } else if (e.type=="mouseUp") {
                dragMc.stopDrag();
                timer.start();
                dragMc.removeEventListener(MouseEvent.MOUSE_MOVE,dragFun);
            } else if (e.type=="mouseMove") {

                vidProgressNum=vidTotalTime*(dragMc.x-lineMc.x)/lineMc.width ;
                ns.seek(vidProgressNum);

                var i:int=lineMc.totalFrames*(dragMc.x-lineMc.x)/lineMc.width;
                lineMc.gotoAndStop(i);
            }
        }

        //================togglePause
        public static var togglePause:MovieClip;
        public static function togglePauseFun(_togglePause:MovieClip) {
            togglePause=_togglePause;
            togglePause.stop();
            togglePause.addEventListener(MouseEvent.CLICK,ontogglePause);
        }
        public static function ontogglePause(e:MouseEvent) {
            if (togglePause.currentFrame==1) {
                togglePause.gotoAndStop(2);
            } else {
                togglePause.gotoAndStop(1);
            }
            ns.togglePause();
        }

        //声音=========================
        public static var voiceMc:MovieClip;
        public static var rec:Rectangle;
        public static function voiceFun(_voiceMc:MovieClip) {
            voiceMc=_voiceMc;
            voiceMc.stop();
            voiceMc.addEventListener(MouseEvent.MOUSE_UP ,onVoice);
        }
        public static function onVoice(e:MouseEvent ) {
            if (voiceMc.currentFrame==1) {
                voiceMc.nextFrame();
                soundTF=ns.soundTransform;//控制的目标
                soundTF.volume=0;//设置目标的声音为0
                ns.soundTransform=soundTF;
            } else {
                voiceMc.prevFrame();
                soundTF=ns.soundTransform;//控制的目标
                soundTF.volume=1;//设置目标的声音为0
                ns.soundTransform=soundTF;
            }

        }

    }
}