iOS Human Interface Guidelines https://developer.apple.com/library/ios/#documentation/UserExperience/Conceptual/MobileHIG/Introduction/Introduction.html https:

iOS Human Interface Guidelines https://developer.apple.com/library/ios/#documentation/UserExperience/Conceptual/MobileHIG/Introduction/Introduction.html https://developer.apple.com/library/ios/#documentation/UserE... Apple recommends reading it all the way through first as opposed to using it as a quick reference on a specific topic.