NSXMLParserDelegate methods are not called - iphone

Question

Hi iam parsing an xml file and i got the response also which i have stored in a responseString.My problem with the delegate methods which are not being called, here's my parsing code
-(void)getData
{
NSURL *url = [NSURL URLWithString:#"http://quizpro.testshell.net/api/quiz/4"];
NSData *data = [NSData dataWithContentsOfURL:url]; // Load XML data from web
NSString *applicationDocumentsDir =
[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *storePath = [applicationDocumentsDir stringByAppendingPathComponent:#"quiz.xml"];
NSLog(#"store path is %#",storePath);
[data writeToFile:storePath atomically:TRUE];
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
request.delegate=self;
[request startSynchronous];
NSError *error = [request error];
if (!error)
{
NSData *responseData=[request responseData];
NSString *data =[[[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding] autorelease];
NSString *usableXmlString = [data stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSLog(#"usableXmlString is %#",usableXmlString);
NSData *usableData = [usableXmlString dataUsingEncoding:NSUTF8StringEncoding];
NSXMLParser *xmlParser = [[NSXMLParser alloc]initWithData:usableData];
[xmlParser setDelegate:self];
[xmlParser parse];
}
}
- (void)requestFinished:(ASIHTTPRequest *)request
{
NSLog(#"requestFinished method");
// Use when fetching text
NSString *responseString = [request responseString];
** I get the entire data here **
NSLog(#"responseString is %#",responseString);
NSData *xData = [responseString dataUsingEncoding:NSUTF8StringEncoding];
//myCode.text = responseString;
//NSLog(#" response %#", responseString);
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:xData];
[parser setDelegate:self];
[parser parse];
[parser release];
}
And i wrote the NSXMLParser delegate methods like below
-(void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
NSLog(#"parser/didStartElement");
currentTag = elementName;
if ([currentTag isEqualToString:#"questions"])
{
exams_object=[[ExamsObject alloc]init];
NSLog(#"%#",currentTag);
}
if ([currentTag isEqualToString:#"Question"])
{
exams_object=[[ExamsObject alloc]init];
}
if ([currentTag isEqualToString:#"Response"])
{
exams_object.responseArray=[[NSMutableArray alloc]init];
}
NSLog(#"%#",currentTag);
}
-(void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
NSLog(#"parser/didEndElement");
if ([currentTag isEqualToString:#"questions"])
{
exams_object=[[ExamsObject alloc]init];
}
if([elementName isEqualToString:#"Question"])
{
[mainArray addObject:exams_object];
}
}
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)str
{
NSLog(#"parser/foundCharacters");
if ([currentTag isEqualToString:#"questionText"])
{
[exams_object.questionArray addObject:str];
}
if ([currentTag isEqualToString:#"responseText"])
{
[exams_object.responseArray addObject:str];
}
}
Thanks for help me

Answer 1

Have you included NSXMLParserDelegate and ASIHTTPRequestDelegate in your .h file ?
You are calling the method to parse the XML from delegate of ASIHTTPRequest
Check the flow of execution using breakpoints.
#interface yourClassName: NSObject <NSXMLParserDelegate, ASIHTTPRequestDelegate>
Also check these stackoverflow questions
Question 1
Question 2

Answer 2

Check whether you have added NSXMLParserDelegate in #interface and set parser.delegate=self in the class where you are using.