I wrote an iOS app around the iOS9 release and did it purely in Swift. It's a great language and easy to grasp. I liked the if let pattern for example. The har

I wrote an iOS app around the iOS9 release and did it purely in Swift. It's a great language and easy to grasp. I liked the if let pattern for example. The hard part is using the frameworks and not getting annoyed of XCode slow downs, the language itself is very friendly. Documentation is good too. Worked through the Stanford course which gives you a great introduction and a book about iOS design with Swift implementation.