Yes, I am aware of How to incorporate WebSockets into a Cocoa application, but that question is almost a year old and it is clear that the selected answer (zimt) is no longer an acceptable solution.
Is there any WebSocket client that is usable from within my iOS application? It can be C or Objective-C, but it has to have full support for WebSocket (Zimt doesn't handle Sec-WebSocket-Key1 and Sec-WebSocket-Key2).
Check out SocketRocket. It supports the latest standard, RFC 6455, which Unitt does not. No CocoaAsyncSocket dependencies either.