Cocoa Touch added API for presenting a view controller in a popup bubble in iPhone OS 3.2, the responsible class is named UIPopoverController. One would guess that this new class is a subclass of UIViewController, just like UINavigationController is, but that is not the case. One would also guess that in functionality many ideas for [...]

Many UI frameworks, including AppKit for Mac OS X and UIKit for iPhone OS, require that all methods to UI components are sent on the main UI thread. Cocoa and Cocoa Touch make this quite easy by providing for example -[NSObject performSelectorOnMainThread:withObject:waitUntilDone:] in Foundation. Making updating the text for a text field a snap: [someTextField [...]

A luxury that you seldom have in the world of software development is the luxury of starting over. I am not talking about throwing away everything and start from scratch. But just taking what you have, and all the experiences learned. Apply some major refactoring to make what works really shine, and without care of [...]