I haven't yet written anything here about Swift. It's not because I haven't played with it (I have), and it's not because I don't have thoughts on it (I do). I just feel like, until I've actually shipped an app using it, I'm not qualified to write about it with any level of authority. And at the moment, I've not shipped an app using Swift.
That's about to change. I'm working on a long-overdue update to PuzzleTiles. I decided from the start not to rewrite any existing code in Swift. What I have been doing, however, is writing all new code in Swift.
This has taught me a lot about Swift; especially, how Swift and Objective-C interoperate. I'll be posting more about this later. And, from this point forward, any code in my posts will be almost certainly be Swift, not Objective-C.