Timeline类

import fl.event.Timeline; 
Timeline.init(/*一个位于动态层的空的mc*/); 
var mc:MovieClip = Timeline.get(); 
//这个mc想怎么用，就怎么用 
/* Do something…*/ 
mc.removeMovieClip(); 
//用完删除即可。 
Class: 
import fl.util.Stack; 
import fl.error.TimelineNotInitError; 
import fl.error.ParamError; 
class fl.event.Timeline { 
              static var parent:MovieClip; 
              static var depth:Number; 
              static var closeList; 
              static var inited:Boolean = false; 
              /** 
               *初始化 
               *@see fl.util.Stack 
               *@param mc:  
               *@return void 
               */ 
              public static function init(mc:MovieClip):Void { 
                            parent = mc; 
                            parent.clear(); 
                            //parent._visible = false; 
                            depth = 0; 
                            inited = true; 
                            closeList = new Stack(); 
              } 
              /** 
               *得到一个mc 
               *@see fl.error.TimelineNotInit 
               *@throw TimelineNotInit() 
               *@return  
               */ 
              public static function get():MovieClip { 
                            if (!inited) { 
                                          throw new TimelineNotInitError(); 
                            } 
                            var redepth:Number; 
                            try { 
                                          redepth = Number(closeList.pop()); 
                            } catch (e) { 
                                          redepth = depth++; 
                            } 
                            var result:MovieClip = parent.createEmptyMovieClip("p" + redepth, redepth); 
                            result.onUnload = function() { 
                                          Timeline.del(this); 
                            }; 
                            return result; 
              } 
              /** 
               *删除 
               *@see fl.error.Param 
               *@throw Param("mc") 
               *@param mc:  
               *@return void 
               */ 
              public static function remove(mc:MovieClip):Void { 
                            if (mc._parent != parent) { 
                                          throw new ParamError("mc"); 
                            } 
                            closeList.push(mc.getDepth()); 
                            mc.removeMovieClip(); 
              } 
              /** 
               *清空 
               *@return void 
               */ 
              public static function clear():Void { 
                            for (var i in parent) { 
                                          parent[i].removeMovieClip(); 
                            } 
                            depth = 0; 
                            closeList.init(); 
              } 
              static function del(mc:MovieClip):Void { 
                            closeList.push(mc.getDepth()); 
              } 
              private function Timeline() { 
              } 
}