var myListener:Object = new Object(); myListener.onKeyDown = function() { switch (Key.getCode()) { case Key.UP : trace("你按了上键"); break; case Key.DOWN : trace("你按了下键"); break; case Key.LEFT : trace("你按了左键"); break; case Key.RIGHT : trace("你按了右键"); break; default : break; } }; Key.addListener(myListener);