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There has been an explosion of interest in creating content for the iPhone in the past couple of years, and recently, a corresponding rush of libraries and frameworks to make building iPhone apps easier for those of us who are not experts in Objective-C and Cocoa Touch. Some of these libraries are targeted at web designers, some at programmers.

I've had a few questions about the software I used in my previous screencasts. I created the app using Xcode for the Mac. Xcode is a developer tool, and if you want to develop iPhone apps, you'll need to download both Xcode and the iPhone SDK.

I got some great feedback on my first screencast - thank you! A few of you asked: how can you show a different view for each of the rows in the table view, instead of just showing the same view for each row? I can think of a couple of ways to do this. Here's a new screencast that expands on the previous O'Reilly Books example, with code samples.

One of the most common questions from the iPhone workshops we held recently is: "What is key value coding and why the heck am I getting this error?"

The TableView is a common way to display data on an iPhone. Combining a tab bar with a table view and navigation bar isn't very difficult, but it took me forever to figure out how to do it properly. In my screencast, learn how to avoid common beginner errors and enjoy a practical follow-along exercise to build an app with a tab bar, navigation bar and table view controllers.

I just started learning how to develop for the iPhone. After helping to put together an iPhone workshop with my friend Joe Heck, I got really excited about this new platform. I've dabbled in Cocoa and Objective C before, many years ago, and figured it was time to relearn Mac development so I could write my own apps for the iPhone.