I had the same experience on the book vs lecture question. I first read Kochan's Objective-C book, and then started the Big Nerd Ranch iOS programming book. But

I had the same experience on the book vs lecture question. I first read Kochan's Objective-C book, and then started the Big Nerd Ranch iOS programming book. But I never really grokked core concepts, like MVC, that I easily grasped watching Hegerty's lectures.