IOS Nib helper for 3.5 and 4 inches
github.com
github.com
What I do is:
iPhone 3.5 = nibName~iphone3_5
iPhone 4 inch = nibName~iphone4
iPad = nibName~ipad
Then, when I'm editing my nib files in Xcode, it's much quicker to figure out which one to click on based upon the name.