Acknowledgments

This book could not have existed without a great deal of effort from far too many behind-the-scenes people; although there are only two authors on the cover, dozens of people were responsible for bringing this book to completion. We would like to thank Trina MacDonald first and foremost; without her leadership and her driving us to meet deadlines, we would never have been able to finish. The editors at Pearson have been exceptionally helpful; their continual efforts show on every page, from catching our typos to pointing out technical concerns. The dedicated work of Niklas Saers, Olivia Basegio, Justin Williams, Sheri Replin, Elaine Wiley, Cheri Clark, Chuti Prasertsith, and Gloria Shurick made the following pages possible.

We would also like to thank Jordan Langille of Langille Design (http://jordanlangille.com) for providing the designs for the Whack-a-Cac game featured in Chapters 3 and 4. His efforts have made the Game Center sample projects much more compelling.

The considerable amount of time spent working on this book was shouldered not only by us but also by our families and co-workers. We would like to thank everyone who surrounds us in our daily lives for taking a considerable amount of work off of our plates, as well as understanding the demands that a project like this brings.

Finally, we would like to thank the community at large. All too often we consulted developer forums, blog posts, and associates to ask questions or provide feedback. Without the hard efforts of everyone involved in the iOS community, this book would not be nearly as complete.