ptg11539604
xv
Preface
how items follow one another onscreen. You uncover the natural relationships in your
design and detail them through constraint-based rules. This chapter introduces the
expressiveness of Auto Layout design, spotlighting its underlying philosophy and offering
examples that showcase its features.
■
Chapter 7 , “Layout Solutions” —The chapters leading up to this one focus on know-
how and philosophy. This chapter introduces solutions. You’ll read about a variety of
real-world challenges and how Auto Layout provides practical answers for day-to-day
development work. The topics are grab bag, showcasing requests developers commonly
ask about.
■
Appendix A , “Answers to Exercises” — This appendix provides the answers to all the
chapter-ending exercises.
About the Sample Code
This book follows the trend I started in my iOS Developer’s Cookbook series. This book’s iOS
sample code always starts off from a single main.m file, where you’ll find the heart of the
application powering the example. This is not how people normally develop iOS or Cocoa
applications or how they should be developing them, but it provides a great way of presenting
a single big idea. It’s hard to tell a story when readers must search through many files and try
to find out what is relevant and what is not. Offering a single launching point concentrates the
story, allowing access to an idea in a single chunk.
The presentation in this book does not produce code in a standard day-to-day best-practices
approach. Instead, it offers concise solutions that you can incorporate into your work as
needed. For the most part, the examples for this book use a single application identifier: com.
sadun.helloworld. This avoids clogging up your iOS devices with dozens of examples at once.
Each example replaces the preceding one, ensuring that your home screen remains relatively
uncluttered. If you want to install several examples simultaneously, you can simply edit the
identifier, adding a unique suffix, such as com.sadun.helloworld.table-edits.
You can also edit the custom display name to make the apps visually distinct. Your iOS Team
Provisioning Profile matches every application identifier, including com.sadun.helloworld. This
allows you to install compiled code to devices without having to change the identifier; just
make sure to update your signing identity in each project’s build settings.
There is a smattering of OS X code in this book as well. This is not an OS X–centered book
(as you can guess from the title), but I’ve covered OS X topics where it makes sense to do so.
I spend the majority of my time in iOS, so please forgive any OS X faux pas I make along the
way and do drop me notes to help me correct whatever I’ve gotten wrong.
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