title: Is there a framework for image caching on iOs?
body: <p>I'm already using AFNetworking for async image download. I was wondering if there's a way for storing on disk or Core Data, should I investigate SDWebImage for that? Or you would suggest to have a custom solution.
  Basically I would like to have a very transparent way to get images from a url, so first look for them in a NSCache, if not found look on disk (or Core Data)l if not found again download async.
  Thanks for any idea</p>