Problem creating protocol in Xcode?

Question

Apple Xcode

I am studying Objective C in the group https://vk.com/iosdevcourse. At the 7th lesson on protocols, I ran into a problem: I create a protocol file but I cannot declare a text property, since the program does not "see" NSString. How to fix the problem?

Answer 1

Issue resolved
stackoverflow.com/questions/20740939/why-auto-comp...