The class responsible for driving the engine's main loop.
负责驱动引擎主循环的类。
静态
The interval time of each frame in milliseconds.
每帧的间隔时间，单位为毫秒。
The frame number of the last run.
最近一次运行的帧号。
En
The class responsible for driving the engine's main loop.
Zh
负责驱动引擎主循环的类。