Bonus Tracks are free screencasts on practical tips and tricks
related to topics we teach in our Pragmatic Studio training
courses. Each screencast is short and focused on one technique so
you can quickly move on and apply it to your application. Some of these
techniques are taught in depth during a course, and others are simply bonus
material you can enjoy before or after a Studio.
Giving your Objective-C classes, methods, and variables meaningful names is the single-most important thing you can do to make your code easier to read and maintain. Thankfully, you don't have to get it right the first time. Xcode's refactoring support makes changing names later a breeze. Learn how in this screencast.
You'll end up spending a fair amount of time in the Cocoa and iPhone SDK documentation. This screencast shows you how to get there quickly from Xcode and find what you're looking for.