急死人了,无论我在unity 3.5、4.0、4.5,还是安装NGUI任何版本,在打开范例文件的时候,都是提示:“Assets/3D Tower Defense Starter Kit/Scripts/GUI/GUIImpl.cs(847,16): error CS0246: The type or namespace name `UIFilledSprite' could not be found. Are you missing a using directive or an assembly reference?“
所以,有人能告诉我`UIFilledSprite'在哪里可以找到??谢谢~!