title: RestKit: How to expire / clear the Core Data cache?
body: <p>I'm developing an app that deals with a lot of images / photos / videos sent and retrieved from a server, and i'm using RestKit's Core Data integration as a cache in my iOS app so said media loads faster after it's already been retrieved. However, I want the user to be able to clear the cache and refetch from the server as well. How can I tell RestKit to expire the Core Data cache, either based on a time period or by the user?</p>
  
  <p>Any help is appreciated -- Stack Overflow has been an incredible resource for me, and I am deeply appreciative :-)</p>