I’m working from a copy of the iOS Programming: The Big Nerd Ranch Guide 2nd Edition ©2011. It seems like Apple must have made some changes to Xcode since then.
I’m running Xcode 4.6.1 on Mac OS X 10.8.3
The first difference was that there is no template for Window-based Application. So I used the template for Single-View Application. (I also tried Empty Application, it it didn’t create a .xib file)
This creates additional files in addition to BNRAppDelegate files,
The way you hook up connections in Interface Builder appears to be different than the 2nd ed. book. For one thing, BNRAppDelegate does not appear in the Outline/Dock. Also, I couldn’t make connections to IBOutlets if they were in BNRAppDelegate.
So I just did all the editing in View Controller and didn’t edit BNRAppDelegate.h or BNRAppDelegate.m at all
I got Quiz working , but had to deviate from the book somewhat.