I like JSQMessagesViewController. I really do. But as we can see now, JSQMessagesViewController is no longer officially supported or maintained. It's sad. I would have been really happy if I could use a well-maintained chat user interface as I did before.
Anyway I was wondering how difficult it would be to implement a chat UI from scratch. I had started to design my solution a few weeks ago, and now it seems to be a lifesaver to have a ready to use implementation.
RCMessageKit is definitely not as complex as JSQMessagesViewController was, but it might be an advantage instead of a disadvantage. You can have the 1.0 version now. I hope more and more features will be implemented in the near future.