Learning Objective-C or Swift is outside of the domain of this guide but here are some great resources for doing so:

Ray Wenderlich books and tutorials - free tutorials | The iOS Apprentice Series (great for beginners) | iOS Games by Tutorials

Online video courses by Paul Solt - Swift and iOS 8 apps in 31 days | Make iPhone Apps in Objective-C (Beginners Course)

Stanford iOS Lectures - this is a great free resource.