Most of what you need to learn is Cocoa Touch and whatever other frameworks you want to use. If you need to start today, use the production Xcode and Objective

Most of what you need to learn is Cocoa Touch and whatever other frameworks you want to use. If you need to start today, use the production Xcode and Objective-C -- it will be far less frustrating. Give the Swift book a quick read in a month or so, so you are familiar with the differences. Perhaps start thinking of Swift in August.