Rather than building cacheing in, AFNetworking is designed to work with NSURLCache. I strongly recommend Peter Steinberger's [SDURLCache](https://github.com/steipete/SDURLCache) fork, which includes disk cacheing on iOS.

That should be a great idea (I started down that path too), but have you run into the problems I describe with NSURLCache at http://stackoverflow.com/questions/7166422/nsurlconnection-o... ?