RSSKit

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RSSKit is an easy-to use iOS framework to make RSS feed processing simple. It consists of only 3 small classes, so it's extremely lightweight yet powerful. It supports both the RSS 2.0 and the Atom 1.0 feed formats.

How to use the framework

1. #import < RSSKit/RSSKit.h >

2. Define a class which conforms to the RSSParserDelegate, i. e.:

   @interface MyParserDelegate: NSObject < RSSParserDelegate > 

3. Instantiate an RSSParser object using an NSString with an URL containing a valid RSS/Atom feed; e. g.

   RSSParser *parser = [[RSSParser alloc] initWithUrl:@"http://example.com/feed"];

4. Set an instance of your freshly declared delegate class as the parser's delegate, that is:

   MyParserDelegate *theDelegateObject = [[MyParserDelegate alloc] init];
   parser.delegate = theDelegateObject;

5. Call

   [parser parse];

6. Implement the rssParser:didParseFeed: method in your delegate class. As the 2nd parameter it'll be passed an RSSFeed instance. The properties of this class are named meaningfully; the articles property will contain an NSArray of RSSEntry objects, representing the items/summaries of the feed, respectively (this class also has obviously-named properties).
7. You can also implement rssParserDidStartParsing: and rssParser:didFailWithError:.