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Geoffrey Goetz gave a presentation on iPhone application development at the Columbus iPhone Developer User Group on July 27, 2010. His topic was mainly a recap of some of the application approval and performance issues that were covered at the 2010 WWDC.

The most interesting part of his presentation for me was his presentation on using the Zombies feature of Instruments. We had some random crashes going on in our Basketball Statware application, and this might have helped to chase down the problem. As it was, I believe we fixed the problem by moving like named variables just sitting by themselves in the implementation files inside the class as class variables.

Geoffrey Goetz gave a presentation on iPhone software development at the Columbus iPhone Developer User Group on October 27, 2009. He mostly talked about a lot of different topics, most importantly the creation of an iPhone application that utilized different types of view controllers.

During his demo, he created a new project from scratch based on the window template of the iPhone SDK, even though he was creating an application with a tab bar. I am probably going to revisit one of the applications that I am working on, which is also an application that uses a tab bar. However, I have had some issues with it, and I think that after seeing Geoffrey’s demo, it might be better to create it the way he did it than to use the tab bar application template included in the SDK.

Geoffrey posted his demo code and presentation files to the CIDUG web site.  Here is a link:

http://groups.google.com/group/cidug/files

Thanks to Geoffrey, he did a nice job (even though he ran way way over the time) and his information was super relevant.

Mac Liaw gave a presentation on iPhone game development at the Columbus iPhone Developer User Group on August 25, 2009. He mostly talked about how the iPhone is a very different platform to develop games for than the typical video game consoles.

I can sort of understand some of what he was talking about. In my experience developing games for the Atari 2600, a one or two person team can, with a good idea, produce a killer product. (Of course, the iPhone has at minimum 128 megabytes of RAM, while the Atari 2600 had 128 bytes of RAM, which is a topic for another blog post.) I have been kicking around a couple of ideas for games, now all I have to do is learn OpenGL ES. And find an artist who will work for peanuts.

Justin Searls gave a very good presentation on the Three20 toolkit for the iPhone SDK. The presentation was given at the Columbus iPhone Developer User Group on July 28, 2009.

The Three20 toolkit has a lot of interesting additions and extensions to the iPhone SDK, the most used of which is a photo and thumbnail browser that is based on the ones written for the Facebook iPhone application.

Here is a link to the Columbus iPhone Developers User Group:

CIDUG

And here is a link to Justin’s posting to the group, which includes instructions on where to find the Three20 code and information on installation and usage:

7/28 CIDUG Meeting on Three20