I love that id software release their old engines as open source, if you haven’t checked out the Wolfenstein and Doom source for iOS yet then you should check it out. This is so much better than it being in a museum!
Visual debugging helper for the iOS Simulator (and apparently the device too).
Not specific to iOS but completely relevant anyway as so many of our iOS apps rely on back end servers which can fail. This interview with David Heinemeier Hansson from 37 signals on dealing with times of crisis should be a lesson to us all in customer service.
Make something, no matter how small better every single day and before you know it you will be miles from where you started.
It’s stuff like this that can keep me awake at night, I really felt for Andreas Illiger when I saw this in my app store updates this week.
Not Objective-C or iOS but I thought this was a fantastic write up of what a truly talented developer is capable of. “He wrote a raycaster from his brain in one go. He didn’t copy-paste old code he’d written, he didn’t use any SuperDuper Physics Library (tm)… he just coded to do what he needed - and he knew exactly how to do it.”