iPhone XML Parsing problem

I am trying to extract the title from this xml:

<entry>
...
 <title type="html">Some title</title>
 <published>2011-02-07T00:04:16Z</published>
 <updated>2011-02-07T00:04:16Z</updated>
...
</entry>

in the NSXMLParsing's didStartElement code:

if ([elementName isEqualToString:@"entry"]) 
 {
    item = [[NSMutableDictionary alloc] init];
 }

if([elementName isEqualToString:@"title"])
 {
    currentElement = [elementName copy];
    currentTitle = [[NSMutableString alloc] init];
 }

in foundCharacters:

if ([currentElement isEqualToString:@"title"]) 
{
    [currentTitle appendString:string];
}

in didEndElement:

if ([elementName isEqualToString:@"entry"])
{
    [item setObject:current开发者_运维百科Title forKey:@"title"];

    [currentElement release];
    currentElement = nil;
    [item release];
    item = nil;

}

The problem is that for some reason when it gets to the didEndElement the currentTitle has got the three node's content, so its:

Some title2011-02-07T00:04:16Z2011-02-07T00:04:16Z

I don't get why its picking up the published and updated node and appending them to the title string.

You set currentElement to @"title" in didStartElement: but you never unset it. The first element in this particular XML file is title, so you set currentElement and for every foundCharacters: thereafter you append them. Change didStartElement: to:

currentElement = [elementName copy];
if ([elementName isEqualToString:@"entry"]) 
 {
    item = [[NSMutableDictionary alloc] init];
 }

if([elementName isEqualToString:@"title"])
 {
    currentTitle = [[NSMutableString alloc] init];
 }

You have to add to didEndElement:

if ([elementName isEqualToString:@"title"])
{
    [currentElement release];
    currentElement = nil;
}

define NSMutableString *strFoundCharacters; in class method set property and synthesize it. then in

- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *) string {
    NSString *strAppend = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
    if ([strAppend length] > 0) {
        [self.strFoundCharacters appendString:string];
    }
}

make nil to strfoundcharacter in

 - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{


if ([elementName isEqualToString:@"title"] ) {
        self.currentTitle = self.strFoundCharacters;
    }
    [self.strFoundCharacters setString:@""];

    }

i think it will work