Just read this yesterday, it's long but a great read if you are looking to move to swift. The content is a little old, as they are using beta xcode and therefore not swift 1.0, but there are still issues they bring up with their approach that are relevant today.
artsy.github.io
Just read this yesterday, it's long but a great read if you are looking to move to swift. The content is a little old, as they are using beta xcode and therefore not swift 1.0, but there are still issues they bring up with their approach that are relevant today.