On Tuesday, Apple published a new iBook in its iBooks Store entitled iOS Human Interface Guidelines that goes over some details about creating beautiful, user-friendly applications that not only look good, but also function effectively.
It's a good read for new developers migrating to the iOS or Mac OS platform that are looking for tips on how to create great applications.
The iBook includes details for the company's latest operating systems including iOS 7 and Mac OS X Mavericks.
Originally Posted by Apple
Sources: iBooks Store via MacRumors