How to parse the following XML?

Question

<colors>
    <color colorName="Abracadabra" colorNumber="D51-2" rColor="209" gColor="224" bColor="229" colorCollection="Harmony" colorFamily="Shaded" rating="3" surfaces="" colorGroup="Blues" />
    <color colorName="Abyss" colorNumber="B50-1" rColor="233" gColor="247" bColor="249" colorCollection="" colorFamily="Clean" rating="3" surfaces="" colorGroup="Blues" />
<colors>

I am getting the above XML data from web service. I am not getting how to parse it.I would like to have 'colorNameArray' containing all the color names, 'colorNumberArray' containing all the color numbers and so on for all the details. Code for this with parser delegates is appreciable. Thank You

Answer 1

just use simple attribute XML Parsing below is sample code of that

-(void)startParsingForFriendRequest:(NSString *)userID  
{

    NSString *urlString = [NSString stringWithFormat:@"http://www.example.com/user_id=%@",userID];
    ////NSLog(@"urlString : %@",urlString);
    NSURL *xmlURL = [NSURL URLWithString:urlString];

    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] initWithURL:xmlURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0]autorelease];

    NSURLResponse *returnedResponse = nil;
    NSError *returnedError = nil;
    NSData *itemData  = [NSURLConnection sendSynchronousRequest:request returningResponse:&returnedResponse error:&returnedError];
    NSString *itemString = [[[NSString alloc] initWithBytes:[itemData bytes] length:[itemData length] encoding:NSUTF8StringEncoding]autorelease];

    //NSLog(@"itemString : %@",itemString);


    NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData:itemData];       
    [xmlParser setDelegate:self];

    [xmlParser parse];

}

- (void)parserDidStartDocument:(NSXMLParser *)parser
{

    ////NSLog(@"parserDidStartDocument");

}

- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError
{
    ////NSLog(@"parseErrorOccurred");
    NSString * errorString = [NSString stringWithFormat:@"Error (Error code %i )", [parseError code]];
    UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Error loading data" message:errorString delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [errorAlert show];
    [errorAlert release];

}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict

{
    ////NSLog(@"didStartElement");

    //////NSLog(@"elementName : %@",elementName);

    //////NSLog(@"namespaceURI : %@",namespaceURI);

    //////NSLog(@"qualifiedName : %@",qualifiedName);

    ////NSLog(@"attributeDict : %@",attributeDict);

    [registerNewArr addObject:attributeDict];

}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
    ////NSLog(@"foundCharacters");


}

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

{
    ////NSLog(@"didEndElement");


}

- (void)parserDidEndDocument:(NSXMLParser *)parser
{

    if ([[[registerNewArr objectAtIndex:1]objectForKey:@"Transaction"]isEqualToString:@"loginxml"]) {
        [(LoginViewController *)obj getRegisterResult:registerNewArr];

    }

}

Answer 2

you can get help from apple reference library here

Answer 3

This link gives a good understanding for xml parsing using nsxmlparser .(sample code available).

The values are present as the attributes so it can be obtained from attributeDict of didStartElement delegate method of nsxmlparser.

for ex:

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{ 

 if([elementName isEqualToString:@"color"])
{
    NSString* colorName = [attributeDict objectForKey:@"colorName"]];

}   
}

All The Best.