This book is a field guide for .NET developers exploring the foreign world of native iOS programming. It explains the iOS development platform by comparing and contrasting it with tools, APIs, and concepts familiar to .NET developers.
The author, Josh Smith, was a Microsoft MVP for four years thanks to his technical and written contributions in the Client Application Development community. He has worked on enterprise iOS applications since 2010. This is the book he wished had existed when he started learning iOS.
Good overview for a .NET programmer
This book was like sitting down with a friend and him explaining iOS by relating it to concepts I am familiar with in .NET. Josh provides a good high level introduction with pointers to deeper explanations of advanced topics. His real world experience shows with the guidance he provides. I found this book very useful.
A Superb Survey
Josh Smith's book is a superb survey of professional iOS development from the perspective of a migrating .Net developer.
Read it first to get a lay of the land, and translate your existing knowledge into iOS. Return to it after more study, to
reinforce best practices for iOS enterprise development. This is your guide to becoming a 'professional'.