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:

For the longest time, I had this lonely single item on customizing the on-screen keyboard on the iPhone sitting in my potential story ideas file. A week or so ago I saw that Matt Gallagher posted a clever keyboard related trick. And then today, Luzian Scherrer sent me a link to a how-to he had […]

Guest author Clint Harris (Profile) is an independent software consultant with experience ranging from enterprise web app work to custom iPhone app development. He currently lives in Brooklyn, New York. Finding an elegant way to reuse and share code (i.e., libraries) across separate iPhone applications can be a bit tricky, especially considering Apple’s restrictions on […]

This tutorial provides a step-by-step howto for consuming JSON web services from an iPhone app. When you’ve finished the tutorial you’ll have created a simple, back-of-a-fortune-cookie inspired, “Lucky Numbers” app with a solitary label whose content will be updated to show a list of lucky numbers fetched from a JSON-over-HTTP web service. Source/Github The code […]