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POAccessing specific child elements when parsing RSS with NSXMLParser
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  1. POAccessing specific child elements when parsing RSS with NSXMLParser
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    copied!<p>Dear Scholars I am trying to parse a RSS feed with the following item element structure</p> <pre><code>&lt;item&gt; &lt;title&gt;Title&lt;/title&gt; &lt;link&gt;http://somelink.com&lt;/link&gt; &lt;description&gt;The description&lt;/description&gt; &lt;author&gt;rss@youtube.com&lt;/author&gt; &lt;guid isPermaLink="false"&gt;http://youtube.com/?v=XBE4AX0Iuvw&lt;/guid&gt; &lt;pubDate&gt;Thu, 11 Nov 2010 10:56:44 +0000&lt;/pubDate&gt; &lt;media:title&gt;Media Title&lt;/media:title&gt; &lt;media:thumbnail width="120" url="http://i1.ytimg.com/vi/XBE4AX0Iuvw/default.jpg" height="90"/&gt; &lt;media:category label="Tags"/&gt; &lt;media:player url="http://youtube.com/?v=XBE4AX0Iuvw"/&gt; &lt;media:credit&gt;Credit name&lt;/media:credit&gt; &lt;enclosure url="http://youtube.com/v/XBE4AX0Iuvw.swf" duration="104" type="application/x-shockwave-flash"/&gt; &lt;/item&gt; </code></pre> <p>Please note the tag <strong>media:thumbnail.url</strong> of which my question is related to.</p> <p>Parser code:</p> <pre><code>// string contants found in the RSS feed static NSString *kIDStr = @"link"; static NSString *kNameStr = @"thumbnail"; static NSString *kImageStr = @"media:thumbnail"; static NSString *kArtistStr = @"description"; static NSString *kEntryStr = @"item"; - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { // entry: { id (link), im:name (app name), im:image (variable height) } // NSLog(@"%@",elementName); // I can see all top level elements,even media:thumbnail if ([elementName isEqualToString:kEntryStr]) { self.workingEntry = [[[AppRecord alloc] init] autorelease]; } storingCharacterData = [elementsToParse containsObject:elementName]; } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if (self.workingEntry) { if (storingCharacterData) { NSString *trimmedString = [workingPropertyString stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet]]; [workingPropertyString setString:@""]; // clear the string for next time if ([elementName isEqualToString:kIDStr]) { self.workingEntry.appURLString = trimmedString; } else if ([elementName isEqualToString:kNameStr]) { self.workingEntry.appName = trimmedString; } else if ([elementName isEqualToString:kImageStr]) { NSLog(@"The Content: %@",workingPropertyString); // Comes back empty, I guess due to the fact it has children inside. // QUESTION: How do I get the value stored in media:thumbnail .url //NSLog(@"&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt;&gt; %@ / %@",[elementsToParse objectAtIndex:2],workingPropertyString); self.workingEntry.imageURLString = trimmedString; } else if ([elementName isEqualToString:kArtistStr]) { self.workingEntry.artist = trimmedString; } } else if ([elementName isEqualToString:kEntryStr]) { [self.workingArray addObject:self.workingEntry]; self.workingEntry = nil; } } } </code></pre> <p>It seems to be a matter of syntax which I am not familiar with, which grabs the value stored in media:thumbnail.url. Can someone be as kind as to assist me in how do do so?</p>
 

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