The tutorial here is foregoing the Xcode templates that start you off with a view controller, which adds alot of complexity. Personally I prefer Paul Hegerty's

The tutorial here is foregoing the Xcode templates that start you off with a view controller, which adds alot of complexity. Personally I prefer Paul Hegerty's approach, where using the basic Xcode template+Storyboards means you don't have to deal with app delegate/window stuff until you need or want to. Previously underlining text was quite difficult, and required using CoreText (C framework) or an open-source wrapper around it, like TTTAttributedLabel. In iOS 6, support for attributed strings was introduced which makes it much easier.