Clear iPhone cache for initWithURL

[Maximinn]

Hi,

My app needs to check a server to see if new content is available. I do this by storing an array inside a .plist on the server and then having the app call

NSMutableArray *onlineArray = [[NSMutableArray alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://server.net/episodes.plist"]];

This works the first time but after that the app seems to cache the response and won't download from the server again unless i turn the device off and on again. Is there a way I can force it to ignore the cache or clear the cache before I call initWithURL?

Thanks very much for any help you can give me.