Ask HN: Resources for learning iOS development in 2013

Thanks for all your answers, I'm looking to do more "proper" iOS development as time goes on rather than just winging it for one app and never returning :) As suggested by callmeed, I'm going to try and book a week off from my day job as trying to learn something like this in the few hours I have free in evenings isn't going to happen (at least not productively) and I've got a target of what I hope to get done by the end of the week - thanks for your suggestions everyone, and I'll be in touch shortly callmeed :)