title: Refresh JSON table in iOS 5
body: <p>I have a table view, which is populated by a single tableviewcell that gets repeated, but filled with detail from a JSON file on the web. SO I have, on startup, 15 cells, each with its own JSON detail view. I'm wondering how I implement a refresh system, with a button preferably, that gets the app to re-download the JSON file. That way, if I make a change in the database, it can then be updated manually. Thanks.</p>