您可以遵循自己的建议(在单独的标题中声明私有方法)，但如果您愿意，可以使用扩展名，而不是类别.

You can follow your own suggestion (declaring the private methods in a separate header), but you can use an extension if you'd prefer, rather than a category.

Apple 通过 UIGestureRecognizer 做到了这一点.看看 UIGestureRecognizerSubclass.h.

Apple does exactly this with UIGestureRecognizer. Take a look in UIGestureRecognizerSubclass.h.