This is a topic I always like to dive into when training as people new to the language can really struggle to realise exactly what is going wrong when an app crashes. This article by Matthijs Hollemans is worth a read if you are new to Objective-C.
Saul Mora with a look at TDD for Core Data models using Magical Record.
Drew McCormack digs into the internals of Core Data iCloud syncing. You should also check out his previous post which has some great advice and gotchas about getting started with iCloud and Core Data.
Matt Gemmell with a new component released this week for displaying a grid style menu. He also gives some insight into the design process while developing the control and it is interesting to see that he considered how both left and right handed people would interact with the control.
Wondering how to create “Clear” style folding or “Flipboard” style flip transitions for your apps? Look no further than this code from Mark Pospesel.
This article from Bjango isn’t brand new but with the release of Creative Suite CS6 this week I thought it was worth a link.
Emeric Thoa looks at a few myths of building and selling a game on the App Store and follows up with some case studies of apps which have published their results.
David Mytton with the story of his company’s journey from launching a simple native app for their server monitoring platform, through a brief diversion to PhoneGap for version 2 before moving back to native for version 3.