I recently graduated and got a position doing iOS development for a start-up. I'm nearing completion of my first app and two iOS concepts I've found to be of vi

I recently graduated and got a position doing iOS development for a start-up. I'm nearing completion of my first app and two iOS concepts I've found to be of vital important are Core Data and GCD. Being able to persist the data you're working with and manage it in a multithreaded context are keys I've found to creating a good UX. For learning, I've browsed the Stanford slides, but I mainly read www.stackoverflow.com. Determining the issue at hand and then seeing how other developers have solved that issue, I've found, is the easiest way for me to learn.