Load xib in subclass of UIViewController subclass
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I have a UIViewController subclass - let's call it A.  A gets its view from an xib file.

I have created a subclass of A, called B.  To keep it simple, B's implementation adds nothing new from the implementation it inherits from A.  

My question is - when I allocate and instantiate an instance of B, the view from A's xib file is not loaded.  Why is this happening?

I typically do my entire UI programmatically, but I have a requirement that I must subclass an existing UIViewController that happens to use an xib file to load its view.  Please help me out if you know how to do this - I'm stuck.
