April-14
A Sprite object is similar to a movie clip, but does not have a timeline. Sprite is an appropriate base class for objects that do not require timelines. For example, Sprite would be a logical base class for user interface (UI) components that typically do not use the timeline.
flash.display.Sprite;创建的图形继承了sprite的graphics属性(graphics : Graphics)
public 属性只能在包内部使用;