Where does @"Cell" come from?


In the lines


where does the @“Cell” identifier come from? It doesn’t seem to be defined anywhere. I replaced with @“wibble” in both cases and the program ran without any apparent errors.

TBH while I understand the basics of what’s happening in this application, I don’t understand the details of how it’s working behind the scenes. Perhaps this will have to wait until I read the dedicated iOS book.