Now that Apple has announce some of the updates coming in iOS 8 SDK, you may want to start upping your game! Here's a list of tutorials to help you learn to develop iOS8 apps using the swift programming language.
According to Apple's Documentation:
Swift is a new programming language for iOS and OS X apps that builds on the best of C and Objective-C, without the constraints of C compatibility. Swift adopts safe programming patterns and adds modern features to make programming easier, more flexible, and more fun. Swift’s clean slate, backed by the mature and much-loved Cocoa and Cocoa Touch frameworks, is an opportunity to reimagine how software development works.