To draw an option combination you draw a frame.
要画选择项组合，你画一个框架。
You draw a frame, and in the frame's namebox the text "loop" is placed.
你画一个框架，在框架的 namebox 中放置文本“loop”。
The number of draw calls per frame. Keep it as low as possible.
每一帧调用绘制的数量。保持尽可能低的水平。
Use a frame window, into which you draw directly, rather than using a view.
使用用户直接向其中描述的框架窗口，而不是视图。
Use a frame window, into which you draw directly, rather than using a view.
使用用户直接向其中描述的框架窗口，而不是视图。
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