Hands-On Design Patterns with Swift

Leaks, cycles, and dangling references

Let's dive into examples of the two most common issues: leaks and crashes related to memory issues. A memory leak occurs when one or many objects become unreachable from the rest of your program but still, in one way or another, form a cycle.

In the first example, we'll look at how to effectively leak memory, using Xcode's powerful memory graph hierarchy tool to track down issues.

In the second example, we'll explore how to debug and investigate crashes related to accessing properties that may have been deallocated.