Guest author Doug Barth is the Lead Architect at Interactive Mediums the mobile-marketing technology company behind the SMS marketing tool TextMe. Git is a distributed version control system (DVCS) that has been gaining adoption in both the Ruby and iPhone development communities. DVCS’s allow a developer to work with version control without connecting to a […]

Guest author Peter Bakhyryev (email) is co-founder of ByteClub, a software development company that provides online multiplayer technologies and services to iPhone application developers. He is located in Brooklyn, New York. In this tutorial, we are going to explore a simple chat application for the iPhone. It allows you to host your own chat room […]

Paul Cantrell’s recent post showed that you can use Objective-C protocols to constrain the behavior of id objects. When declaring an instance variable or parameter as id<Protocol>, the compiler’s type checker will warn when sending message not found in Protocol. For this reason, protocols are pretty handy. But in practice, a problem arises. Let’s say […]

Guest author Jeff LaMarche (Profile) is the co-author of the superb Beginning iPhone Development book. Jeff, and his co-author, Dave Mark (Profile), were previously featured on the Mobile Orchard podcast. In Beginning iPhone Development, we have a chapter on gestures. While I think we covered the topic fairly well, I would have liked to have […]

Editor’s note: I recently bumped into a bit of Objective-C syntax that was unfamiliar to me. The code was in this form: id<SomeProtocol> variableName = [someObject someMessage] I’d never seen a protocol paired with an id type. I asked Paul Cantrell about it and he prepared this: