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POHow to parse XML to iPhone correctly
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  1. POHow to parse XML to iPhone correctly
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    copied!<p>I have an XML file, but do not know what I have done wrong as the app crashed, I do not know how to solve it. Can anyone help giving me some comments.</p> <pre><code>&lt;list&gt; &lt;section name="Texts"&gt; &lt;item&gt; &lt;postID&gt;26&lt;/postID&gt; &lt;title&gt;A sample quiz&lt;/title&gt; &lt;url&gt;http://yahoo.com&lt;/url&gt; &lt;score&gt;20&lt;/score&gt; &lt;/item&gt; &lt;item&gt; &lt;postID&gt;230&lt;/postID&gt; &lt;title&gt;A sample quiz&lt;/title&gt; &lt;url&gt;http://www.yahoo.com&lt;/url&gt; &lt;score&gt;20&lt;/score&gt; &lt;/item&gt; &lt;/section&gt; &lt;section name="Images"&gt; &lt;item&gt; &lt;postID&gt;27&lt;/postID&gt; &lt;title&gt;A sample image quiz&lt;/title&gt; &lt;url&gt;www.google.com&lt;/url&gt; &lt;score&gt;10&lt;/score&gt; &lt;/item&gt; &lt;item&gt; &lt;postID&gt;27&lt;/postID&gt; &lt;title&gt;A sample image quiz&lt;/title&gt; &lt;url&gt;www.google.com&lt;/url&gt; &lt;score&gt;10&lt;/score&gt; &lt;/item&gt; &lt;/section&gt; &lt;/list&gt; </code></pre> <p>Code I have used:</p> <pre><code>-(allChallengeParser *)initXMLParser { self = [super init]; appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate]; appDelegate.allChallengeArray = [[NSMutableArray alloc]init]; xmlChallengeRoot =[[NSMutableArray alloc]init]; return self; } -(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict { //Implement method called NSXMLParser when it hits the start of an element: if([elementName isEqualToString:@"list"]) { NSLog(@"list root element found – create a new instance of challenge OBj..."); allChallengeObj = [[allChallenge alloc] init]; //We do not have any attributes in the user elements, but if // if have can extract them here: // user.att = [[attributeDict objectForKey:@"&lt;att name&gt;"] ...]; } else if([elementName isEqualToString:@"section"]) { allChallengeObj = [[allChallenge alloc] init]; allChallengeObj.section = [attributeDict valueForKey:@"name"]; NSLog(@"allChallengeObj.section %@", allChallengeObj.section); } } - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { if(!currentElementValue) // init the ad hoc string with the value currentElementValue = [[NSMutableString alloc] initWithString:string]; else // append value to the ad hoc string [currentElementValue appendString:string]; NSLog(@"Processing Value for: %@", currentElementValue); } - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { if ([elementName isEqualToString:@"list"]) { return; } if ([elementName isEqualToString:@"section"]) { // We are done with user entry – add the parsed user // object to our user array [xmlChallengeRoot addObject:allChallengeObj]; // release user object allChallengeObj = nil; } else { // The parser hit one of the element values. // This syntax is possible because User object // property names match the XML user element names NSLog(@"elementName %@",elementName); NSLog(@"current Element Value %@",currentElementValue); [allChallengeObj setValue:currentElementValue forKey:elementName]; } currentElementValue = nil; } </code></pre>
 

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