This book teaches the Swift 3 programming language by exploring the development of three applications for Apple platforms: macOS, iOS, and watchOS. This book’s approach might differ from what you’re used to, because our philosophy is that the best way to learn Swift is to build apps using it! The vast majority of the code in this book will be part of the apps we’re building—a full note-taking app for macOS, iOS, and watchOS—rather than individual pieces of sample code. You can see the final product in Figure 1-1.
Figure 1-1. Our finished app, for macOS, iOS, and watchOS
Our app is fully functional, but we do make some deliberate design and feature decisions along the way to constrain the scope a little (the book is almost 500 pages!). As we mentioned in the Preface, we assume that you’re a reasonably capable programmer, but we don’t assume you’ve ever developed for iOS or macOS, or used Swift or Objective-C before. We also assume that you’re fairly comfortable navigating macOS and iOS as a user.
Tip
We recommend that you work through this book front to back, building the macOS app, then the iOS app, then the watchOS app, even if you’re only interested in one of the platforms. By approaching the book this way, you’ll get the best understanding of what building a real app with Swift requires.
Programming with Swift, and using the Cocoa and Cocoa Touch ...
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