small medium large xlarge

The latest version of the book is P1.0, 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 (02-May-17)
PDF page: 43
guard let with where clause (inside updateDistanceLabel method) should be written as such (with OS 3.2): func updateDistanceLabel() { gua...more...