动态地将子项添加到组件，然后动态操作它们？

Question

我不知道为什么这不起作用。我有一个tabnavigator，我动态添加一个导航容器，其中textarea动态添加到导航容器。两者的id都与chatguys [c] [0]具有相同的字符串名称。 它给出了错误，说'TypeError：错误＃1034：类型强制失败：无法将spark.skins.spark :: SkinnableContainerSkin @ 9737851转换为spark.components.TextArea。“在运行时。确实如此？

任何帮助将不胜感激，谢谢:(

                            var idx:uint;
            const len:uint = navigate.numChildren;

            var alreadyexists:Boolean = false;
            for (idx = 0; idx < len; idx++) {
                //var check:spark.components.TextArea = navigate.getElementAt(idx) as spark.components.TextArea;
                //var check:Tab = navigate.getTabAt(idx) as Tab;
                var check:NavigatorContent = navigate.getChildAt(idx) as NavigatorContent;

                // var check = navigate.getElementAt(idx);
                //elmt.selected = tgBtn.selected;

                if (check.label == evt.username)
                {// trace(navigate.getChildAt(idx).label);

                    var c:uint;
                    const p:uint = chatguys.length;
                    for (c = 0; c < p; c++){
                    if(chatguys[c][0] == evt.username){


                        spark.components.TextArea(DisplayObjectContainer(navigate.getChildAt(idx)).getChildAt(chatguys[c][0])).textFlow=TextConverter.importToFlow(chatguys[c][1], TextConverter.TEXT_FIELD_HTML_FORMAT);
                         }}

b这里生病告诉你下半场工作正常，但也许我需要做不同的事情以获得我需要做的事情？

 var chats:Array = [];
        var chatguys:Array = [];

        public function userlist_click() :void{
            var windowname:Object =users_lst.selectedItem;
                            var idx:uint;
                 const len:uint = navigate.numChildren;
                 trace(navigate.numChildren);
                 var alreadyexists:Boolean = false;
                 for (idx = 0; idx < len; idx++) {


                    var check:NavigatorContent = navigate.getChildAt(idx) as NavigatorContent;



                     if (check.label == windowname.name)
                             {
                             alreadyexists = true;
                             }
                 } 
                 if (alreadyexists == false)
                 {

                 chats[windowname.name] = new spark.components.TextArea();
                 chats[windowname.name].x = 10;
                 chats[windowname.name].y= 32; 
                 chats[windowname.name].width= 517.19696 ;
                 chats[windowname.name].height= 343.18182;
                 chats[windowname.name].scroller
                 chats[windowname.name].x="9";
                 chats[windowname.name].y="2";
                 chats[windowname.name].width="517.19696";
                 chats[windowname.name].height="343.18182";

                 chats[windowname.name].setStyle("skinClass", spark.skins.spark.TextAreaSkin);
                 //textArea.skinClass= "spark.skins.spark.TextAreaSkin";
                 chats[windowname.name].text="ffg";
                 chats[windowname.name].setStyle("verticalScrollPolicy", ScrollPolicy.ON);

                 var match = new Array();
                 match.push(windowname.name);
                 match.push('bob');
                 chatguys.push(match);
               for (var i in chatguys){
                   if (chatguys[i][0] == windowname.name){
                 chats[windowname.name].textFlow=TextConverter.importToFlow(chatguys[i][1], TextConverter.TEXT_FIELD_HTML_FORMAT);
               }}

                 chats[windowname.name].id = windowname.name;
                 trace(chats[windowname.name]);

                 var messagebox:NavigatorContent = new NavigatorContent;
                 messagebox.percentWidth= 100;
                 messagebox.percentHeight= 100;
                 messagebox.label = chats[windowname.name];
                 messagebox.id = chats[windowname.name];
                 trace(messagebox.label);
                 messagebox.addElement(chats[windowname.name]);
                 navigate.addChild(messagebox); }}