What literature for IOS development is relevant at the moment?

Question

Objective-C

Hello. There is a sea of ​​literature on this topic, I know thanks, but where can I find the current one, and with relevant examples? There are a lot of guides and videos, but most of the screenshots are for lion, if not earlier. It's a little hard to figure out what's what.
At Apple, everything is rapidly evolving and growing. And a book with a suitable example was never found. And I lied, I'll find something suitable myself.
I don't know anything about this area of ​​development at all, I want to move from the web to it. General recommendations and advice are also accepted with great joy.
I have an iMac, an iPhone and an iPad. So there is something to write about.

Answer 1

vk.com/iosdevcourse - video courses.