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The latest version of the book is P2.0, released over 3 years ago. If you've bought a PDF of the book and would like to update it to this version (for free), visit your home page.

By default this page displays the errata for the latest version of the book. If you have a previous version, select it here:

If you've found a new error, please submit it.

  • Typo
  • Tech. error
  • Suggestion
  • Maybe next edition
  • Not a problem
  • Reported in: P1.0 (11-Nov-16)
Paper page: 6
I am using Xcode 8.1 and was working on the very first example. I'm assuming this is due to iOS 10. let url = NSURL(string: "xxxx://wwwDOTpu...more...
  • Reported in: P1.0 (25-Jul-16)
Paper page: 8
When I attempt to execute the code on page 6 with the additions on page 8, I get this error message listed on bottom. I think that this URL is no long...more...
  • Reported in: P2.0 (12-Sep-16)
PDF page: 24
Paper page: 25
The digging into Documentation section is based on the IOS 9.0 Documentation which is too far from the curent documentation and does not seem accessib...more...
  • Reported in: P1.0 (24-Jul-16)
Paper page: 95
In the first paragraph, the last sentence is "As of this writing, Twitter's SSH support isn't forward-secrecy compliant." It should be "As of this wri...more...
  • Reported in: P2.0 (14-Aug-16)
PDF page: 193
When the auto layout constraints for the stack view are described, it says to give it a top constraint of 0 to the superview. This causes the top of t...more...
  • Reported in: P2.0 (31-Aug-16)
Paper page: 318
Within the "Implementing the Next Keyboard Button" section. I believe "KeyboardViewControllerStoryboard.storyboard" should be "PragmaticTweepsKeyboard...more...