Swift is an object-oriented programming language for iOS and OS X development created by Apple. Designed to coexist with Objective-C and to be more resilient against erroneous code, Swift was introduced in 2014 at Apple's developer conference WWDC. It is built with the LLVM compiler. A 500-page manual, The Swift Programming Language, was released at WWDC as well, available on the iBooks Store for free.
On June 2, 2014, the WWDC app became the first publicly released app written in Swift.