[ActionScript 3.0] 如何控制加载swf动画的播放与暂停

此方法适用于用as 1.0或者as2.0以及as3.0编译的swf，因为as1.0和as2.0编译的swf是AVM1Movie类型，因此需要通过类ForcibleLoader.as将其转换为version 9以上的swf，注意，如果加载的swf是3.0代码编译的，且此swf用文档类编译，则文档类必须继承MovieClip,接下来看代码：

首先写一个加载swf的类SwfPlayer.as：

package com.views
{
    import com.controls.utils.ForcibleLoader;
    
    import flash.display.AVM1Movie;
    import flash.display.Loader;
    import flash.display.MovieClip;
    import flash.display.Shape;
    import flash.events.Event;
    import flash.net.URLRequest;

    /**
     * ...
     * @author Frost.Yen
     */
    public class SwfPlayer extends MovieClip 
    {
        private var _loader:Loader;;
        private var _urlR:URLRequest;
        private var _url:String;
        private var _container:MovieClip;
        private var _mask:Shape;
        private var _forcibleLoader:ForcibleLoader;
        private var _stageW:Number;//swf实际的舞台宽度
        private var _stageH:Number;//swf实际的舞台高度
        public function SwfPlayer() 
        {
            _mask = new Shape();
            _mask.graphics.beginFill(0);
            _mask.graphics.drawRect(0, 0, 10, 10);
            _mask.graphics.endFill();
            this.mask = _mask;
        }
        /**
         * 加载swf
         * @param    url swf路径
         */
        public function Load(url:String):void{
            this._url=url;
            if(!_loader){
                _loader= new Loader()
            }
            _urlR=new URLRequest(_url);
            _loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onComplete);
            _loader.load(_urlR);
        }
        
        private function onComplete(event:Event):void {
            
            if (_loader.content is AVM1Movie) {//如果是as2.0或者1.0代码生成的swf
                trace("_loader.content is AVM1Movie");
                _loader.unloadAndStop();
                _forcibleLoader = new ForcibleLoader(_loader);
                _forcibleLoader.load(_urlR);
                return;
            }
            _loader.contentLoaderInfo.removeEventListener(Event.COMPLETE,onComplete);
            trace(_loader.contentLoaderInfo,_loader,"_loader");
            try
            {
                _container = MovieClip(_loader.content);
                _stageW = _loader.contentLoaderInfo.width;
                _stageH = _loader.contentLoaderInfo.height;
                this.addChild(_container);
            } 
            catch(error:Error) 
            {
                trace(_loader.width,"_loader.width");
                
                _stageW = _loader.width;
                _stageH = _loader.height;
                this.addChild(_loader);
            }
            
            _mask.width = _stageW;
            _mask.height = _stageH;
            
            this.addChild(_mask);
            this.dispatchEvent(new Event(Event.COMPLETE));
        }
        /**
         * 播放下一帧
         */
        public function nextPlay():void{
            if(_container.currentFrame==_container.totalFrames){
                stop();
            }else{
                _container.nextFrame();
            }
        }
        /**
         * 播放上一帧
         */      
        public function prevPlay():void{
            if(_container.currentFrame==1){
                stop();
            }else{
                _container.prevFrame();
            }
        }
        /**
         * 开始播放
         */
        public function startPlay():void
        {
            _container.play();
        }
        /**
         * 暂停播放
         */
        public function pausePlay():void
        {
            _container.stop();
        }
        
        /**
         * 卸载加载的swf
         */
        public function unloadAndStop():void
        {
            
            if(_loader){
                _loader.unloadAndStop();
                _loader = null;
                
            }
            if(_container){
                _container.parent.removeChild(_container);
                _container = null;
            }
            
        }
        
        public function get stageW():Number 
        {
            return _stageW;
        }
        
        public function set stageW(value:Number):void 
        {
            _stageW = value;
        }
        
        public function get stageH():Number 
        {
            return _stageH;
        }
        
        public function set stageH(value:Number):void 
        {
            _stageH = value;
        }
        
    }

}

然后在flash文档类Main.as中调用，flash文档舞台上有两个控制按钮stopBtn，playBtn：

package  
{
    import com.views.SwfPlayer;
    import flash.display.Sprite;
    import flash.events.MouseEvent;
    /**
     * ...
     * @author Frost.Yen
     */
    public class Main extends Sprite 
    {
        private var _swfPlayer:SwfPlayer;
        public function Main() 
        {
            _swfPlayer = new SwfPlayer();
            this.addChild(_swfPlayer);
            _swfPlayer.load("D:/Flash学习/flash动画作品/1/1.swf");
            stopBtn.addEventListener(MouseEvent.CLICK,onStop);
            playBtn.addEventListener(MouseEvent.CLICK,onPlay);
        }
        private function onStop(e:MouseEvent):void 
        {
            _swfPlayer.pausePlay();//暂停播放
        }
        private function onPlay(e:MouseEvent):void 
        {
            _swfPlayer.startPlay();//开始播放
        }
    }
}

附：此类ForcibleLoader.as可到http://download.csdn.net/detail/yan_frost/4771007下载