In storyboard reorder views. Now Smiley view appears and tapping 'Swing Mood' changes views as expected.
Revise comments and pragma marks.
In SmileyAppDelegate application:didFinishLaunchingWithOptions: just return YES. Because we are using Storyboard, it's not necessary to set window.

Reference
http://www.raywenderlich.com/5138/beginning-storyboards-in-ios-5-part-1
In SmileyViewController move properties and methods from .h file to .m file class extension
In SmileyViewController delete dealloc. In ARC, don't need to nil properties.

Reference
http://stackoverflow.com/questions/7906804/do-i-set-properties-to-nil-in-dealloc-when-using-arc
Delete blank lines.
Re-indent code. Many changes are whitespace only.