Implement chat functionality like words with friends on ios [closed]

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I want to add chat functionality to an iOS app similar to what Words With Friends has. Are there any libraries that I can piggy back on or do I need to write it from scratch?

开发者_如何学C

I got a couple of ideas, but all seem expensive: - Build simple chat client server from scratch - Host XMPP server and build XMPP functionality into client - Piggyback on Google Talk or Facebook Chat -- Facebook Chat XMPP protocol doesn't support group chat which I need -- Not enough people use google

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Unfortunately, you will have to write it from scratch. I've written an group chat in the app store and I suggest XMPP.