Interface Builder doesn't call Init?

I made a custom class that is a subclass of UIView and added it by adding a UIView in my xib file then changing its class to my custom class.

My custom class isn't being told initWithFrameCGRect)frame at any time, as the set up code I have in there isn't being called. Is there some other method I should use that will automatically be called when the xib is opened or should I just make my own set up method that my view controller calls?