You can use the hosting controller anywhere you can use a view controller in UIKit.

您可以在任何可以在 UIKit 中使用视图控制器的地方使用托管控制器。

So the host controller over the host USB stick tells the device over the control endpoint, your address is now 20.

因此主机 U 盘上的主机控制器通过控制端点告诉设备，你的地址现在是 20。

You can think of an endpoint like a pipe between the host controller, that is your notebook or your PC, and the device.

您可以将端点想象成主机控制器（即您的笔记本电脑或 PC）与设备之间的管道。