How to construct UIKit subclass

In Xcode ,if I wanna construct UIKit subclass component ,it can choose the parent class ,but in AppCode ,so If I wanna construct a UIkit class, it  always inherit to the NSObject ,so it's so fuzzy, if I wanna do the same task ,how to do using AppCode.

I find the links about the tutorials about the appcode ,cannot find it ,so I think you should give me a tips to do it ,thank for your sharing .