About This Edition

This is the fourth time Pragmatic Programmers has offered an introductory book for iOS developers. The previous entries were iPhone SDK Development in 2009 (covering iPhone OS 3), iOS SDK Development in 2012 (for iOS 6), and iOS 8 SDK Development in 2014 (for iOS 8).

Notice that instead of a two-to-three-year gap like the previous titles, the book you’re holding is coming out just one year and one iOS version after the previous one. The motivation for this is that the platform has developed so quickly that the previous books were near-total rewrites of their predecessors, which took years to finish, yet quickly became dated with the release of a new version of the OS and its software development tools.

Also weighing on our ...

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