Online Resources

This book isn’t just about static words on a page or screen. It comes with a web page, https://www.pragprog.com/titles/adios3, where you can learn more and access useful resources:

• Download the complete source code for all the code examples in the book as ready-to-build Xcode projects.

• Participate in a discussion forum with other readers, fellow developers, and the authors.

• Help improve the book by reporting errata, such as content suggestions and typos.

If you’re reading the ebook, you can also access the source file for any code listing by clicking on the gray-green rectangle before the listing.

As we build our sample projects in this book, we will often write simple code, only to rewrite it with more ambitious code later as our knowledge increases.

All the different versions would be hard to put in one source file. So in the downloadable book code, we often have multiple copies of each project, each representing a different stage of its development. The different stages use numbered folders, like PragmaticTweets-1-1, PragmaticTweets-2-1, and so on, with the first number representing the chapter number and the second being a revision within that chapter. These folder names also appear in the captions for each code example in the text. You can either code along for the entire book from scratch, or copy over one of these “stages” and pick up from there.