iOS Programming: The Big Nerd Ranch Guide, Second Edition

For the More Curious: More on Memory Management

Throughout the book, we include “For the More Curious” sections that go into deeper explanations of topics presented in the chapter. These sections are not absolutely essential to get you where you’re going, but we hope you’ll find them interesting and useful. Because these sections are more in-depth than the chapter, they are often (but not always) more advanced. If you read through one of these sections and feel stupid, don’t worry; everyone felt stupid the first couple of times these concepts were presented to them.

In this chapter, we talked about the heap and how every object lives inside this part of memory. There are actually two more parts of memory that serve different purposes: the data ...