What literature, articles would you recommend for learning objective C?

Question

Objective-C

I wanted to write applications for Mac OS X and iOS. Google said to learn objective-C. Everything that I do not find is strongly tied to other PLs, I would like to find something simpler, as if other languages ​​do not exist at all. Otherwise, for newcomers to reference: first study that language, then that one, and only then will you understand the current one.
Can you recommend books that have helped you better understand or what "hello world" articles, where more or less written for dummies.
On a solid four I know php, sql. Familiar with programming logic in general. But new is new.
Thanks in advance.

Answer 1

Good afternoon, the notorious lectures of Stanford University helped me a lot at one time https://itunes.apple.com/ru/course/developing-ios-... - of course, in English. The current course, however, is already designed for Swift, but the last one has not lost its relevance yet.