UIKit (not to be confused with the front-end framework UIKit) is the object-oriented framework that is responsible for most of the iOS user interface.

- Stackoverflow.com Wiki
2 articles, 0 books.

Like every iteration of iOS, iOS 9 brings forth a lot of new features. UIKit changes with every release of iOS, but one particular addition in iOS 9 will change how developers fundamentally think about creating user interfaces on iOS, UIStackView.