So, I was looking at some WWDC session videos again and the speaker told that if you aren’t using GCD already it’s time to. So I was googling some tutorial specially for iOS and didn’t find any good one. By the way is there any difference with mac GCD and iOS version? So could someone point me to good guide.
Thanks in advance!
There is no difference, the Mac OS X and iOS version both use exactly the same library.
(made comment into answer)