Necessary Hardware and Software
To build and run the applications in this book, you will need a Mac running macOS El Capitan (10.11.4) or newer. You will also need to install Xcode, Apple’s integrated development environment (IDE), which is available on the App Store. Xcode includes the Swift compiler as well as other development tools you will use throughout the book.
Swift is still under rapid development. This book is written for Swift 3.0 and Xcode 8.0. Many of the examples will not work as written with older versions of Xcode. If you are using a newer version of Xcode, there may have been changes in the language that will cause some examples to fail.
As this book is moving into the printing process, Xcode 8.1 Beta is available. ...
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