To address your Swift question, please don't try to learn Swift. It is not worth it, at least not at first. The main thing that matters (is difficult to learn)

To address your Swift question, please don't try to learn Swift. It is not worth it, at least not at first. The main thing that matters (is difficult to learn) is the Cocoa Touch library, which was made with Objective-C for Objective-C. So, if you try to start with Swift it will be much more difficult. Once you're comfortable with Cocoa Touch you can decide whether you want to look at Swift or not. You'll be fine learning Objective-C.