1 <s:Group id="maskGroup" width="503" height="332" x="657" y="165">2         <s:Rect width="100%" height="100%">3             <s:fill>4                 <s:SolidColor color="#000000"/>5             </s:fill>6         </s:Rect>7     </s:Group>

 1 <mx:Canvas x="626" y="151" width="565" height="360" backgroundColor="#5976A4" 2                horizontalScrollPolicy="off" verticalScrollPolicy="off"> 3         <s:Scroller id="scrollerId" width="100%" height="100%" 4                     horizontalScrollPolicy="off" interactionMode="touch" 5                     skinClass="skin.libraryIntroduce.ScrollerSkin"> 6             <s:Group x="0" y="0" width="565" height="360"> 7                 <s:Label id="introTxt" x="31" y="14" width="503" color="#FFFFFF" fontFamily="微软雅黑" 8                          fontSize="20" textAlign="left" verticalAlign="top" 9                          mask="{maskGroup}"/>10             </s:Group>11         </s:Scroller>12     </mx:Canvas>

var file:File=new File("文本文件的绝对路径");if(file2.exists)                    {                        var fileStream:FileStream=new FileStream();                        fileStream.open(file,FileMode.READ);    //算高度仅供参考                    introTxt.height=(Math.floor(Number(fileStream.bytesAvailable/45))+5)*30;                        introTxt.text=fileStream.readMultiByte(fileStream.bytesAvailable,"gbk");                        trace(introTxt.height);                        scrollerId.verticalScrollBar.value=0;                    }