The latest docs from Apple on the basics of Objective-C are marvelous.
I’ve sat with many beginners who are stumped on how to organize their code.
There are so many features they miss. The whole set of docs is great, but their
opening page impressed me the most. It walks through the key pieces you use to
build Objective-C applications. Objects, Protocols, Blocks, Delegates, Error
objects; it’s all right here in one page with short paragraphs and links to