Filtering RSS feed

How can i filter a loaded rss feed to display only the category of news that i choose?

I'm putting each item with its components in a NSMutableDictionnary so I can test on the category, but the problem is, in which method should i put my if开发者_如何学Python conditional and how can i display only the cells with the right news and let the other cells disappear

Instead of using the NSMutableDictionary as the datasource for your table view, you could create an NSArray that is composed of references to the objects in the dictionary that only contain your specified category.