ScreenManager

如果你打算做任何与Gauntlet相关的东西（例如：UI），你就必须熟悉Screen Manager。

The Screen Manager can be used to push screens (which may load Movies), check which screen is focused or top-most, or pop a screen when you are done with it.

Screen Manager可以用来将screen入栈（push） (这可能加载 Movies)，检查哪个screen当前正在被指向（focused）、或在顶端（topmost），或者将已经完成的screen出栈（pop）。