How parse xml array in iOS using xmlParser - ios

Question

I am new to iOS development. I want to parse my xml web-service array. My xml response is like,
<BookList>
<Book>
<BookID>int</BookID>
<BookName>string</BookName>
<Pages>string</Pages>
<Price>string</Price>
</Book>
<Book>
<BookID>int</BookID>
<BookName>string</BookName>
<Pages>string</Pages>
<Price>string</Price>
</Book>
</BookList>
Here is the code i am using to parse the response,
-(void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSString *theXML = [[NSString alloc] initWithBytes:
[self.webResponseData mutableBytes] length:[self.webResponseData length] encoding:NSUTF8StringEncoding];
//now parsing the xml
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData: self.webResponseData];
xmlParser.delegate = self;
// Run the parser
#try{
BOOL parsingResult = [xmlParser parse];
}
#catch (NSException* exception)
{
UIAlertView* alert = [[UIAlertView alloc]initWithTitle:#"Server Error" message:[exception reason] delegate:self cancelButtonTitle:#"OK" otherButtonTitles: nil];
[alert show];
return;
}
}
//Implement the NSXmlParserDelegate methods
-(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:
(NSString *)qName attributes:(NSDictionary *)attributeDict
{
currentElement = elementName;
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
// NSLog(#"String : %#", string);
if ([currentElement isEqualToString:#"BookID"]) {
NSLog(#"BookID : %#", string);
}else if ([currentElement isEqualToString:#"BookName"]) {
NSLog(#"BookName : %#", string);
}else if ([currentElement isEqualToString:#"Pages"]) {
NSLog(#"Pages : %#", string);
}else if ([currentElement isEqualToString:#"Price"]) {
NSLog(#"Price : %#", string);
}
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
// NSLog(#"Current Element: %# ",currentElement);
}
Using this code I can view the results, But i can get the number of books.

Answer 1

You can add this in to .h file
NSMutableDictionary *dictBook;
NSMutableArray *arrBook;
NSMutableString *elementValue;
Now use the below code to get the total book counts.
//Implement the NSXmlParserDelegate methods
-(void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:
(NSString *)qName attributes:(NSDictionary *)attributeDict
{
currentElement = elementName;
if ([currentElement isEqualToString:#"BookList"]) {
arrBook = [[NSMutableArray alloc] init];
}
else if ([currentElement isEqualToString:#"Book"]) {
dictBook = [[NSMutableDictionary alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
if(!elementValue)
elementValue = [[NSMutableString alloc] initWithString:string];
else
elementValue = string; //[elementValue appendString:string];
NSLog(#"elementValue : %#",elementValue);
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
{
// NSLog(#"Current Element: %# ",currentElement);
if ([elementName isEqualToString:#"BookID"] ||
[elementName isEqualToString:#"BookName"] ||
[elementName isEqualToString:#"Pages"] ||
[elementName isEqualToString:#"Price"])
{
[dictBook setObject:elementValue forKey:elementName];
}
else if ([elementName isEqualToString:#"Book"])
{
[arrBook addObject:dictBook];
}
// [elementValue setString:#""];
}
- (void)parserDidEndDocument:(NSXMLParser *)parser {
NSLog(#"Arr Book Count : %lu", (unsigned long)arrBook.count);
}
Hope this will help you.