Topic
#Objective-C
3 notes about Objective-C.
Tracing a Request Through AFNetworking 3.x
Following one GET request through AFNetworking 3.2.1, from request serialization to per-task delegates, and how to design a networking layer around it.
Objective-C Categories and Class Extensions
How Objective-C categories attach methods at runtime and rely on associated objects for storage, while class extensions compile into the class itself.
Understanding the Objective-C Runtime
How Objective-C message sending works: isa, classes and metaclasses, selectors, IMPs, method caches, and the three stages of message forwarding.