StackOverflow2013

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PONSScanner - SLOW performance - (UITableView, NSXMLParser)
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copied!<p>I've had a problem that 's been bugging me for a few days now. </p> <p>I'm parsing an RSS feed with NSXMLParser and feeding the results into a UITableView. Unfortunately, the feed returns some HTML which I parse out with the following method:</p> <pre><code>- (NSString *)flattenHTML:(NSString *)html { NSScanner *theScanner; NSString *text = nil; theScanner = [NSScanner scannerWithString:html]; while ([theScanner isAtEnd] == NO) { [theScanner scanUpToString:@"<" intoString:NULL] ; [theScanner scanUpToString:@">" intoString:&text] ; html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>", text] withString:@""]; } html = [html stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; return html; </code></pre> <p>}</p> <p>I currently call this method during the NSXMLParser delegate method:</p> <pre><code>- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{ </code></pre> <p>This works beautifully HOWEVER it takes almost a minute or more to parse and flatten the HTML into text and fill the cell. During that interminable minute my UITableView is entirely empty with just a lone spinner spinning. That's not good. This is last "bug" to squash before I ship this otherwise wonderfully working app.</p> <p>It's works pretty quickly on the iOS simulator which isn't surprising. </p> <p>Thanks in advance for any advice. </p>

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