how to parse xml - iphone

Question

i am having an output xml which looks something like this,
<?xml version="1.0"?>
<root>
<apple><apple1>A</apple1></apple>
<ball><ball1>B</ball1></ball>
<cat><cat1>C</cat1></cat>
<dog><dog1>D</dog1></dog>
<ele><ele1>E</ele1></ele>
<root>
i am using NSXmlParser, i m confused, is tgis a gud xml structure?>//
secondly i dont knw how to parse this xml , i mean how should i write condition in parser didSTart and didEndElement ???
i m not to able properly navigate through each node, from apple to ele. i just want to assign the returned value of say apple to a string.
same for each node.
i m so confused in if / else condition.
Suggestions are always appreciated
regards

Answer 1

You need to have exactly one root element, like so:
<?xml version="1.0"?>
<root>
<apple><apple1>A</apple1></apple>
<ball><ball1>B</ball1></ball>
<cat><cat1>C</cat1></cat>
<dog><dog1>D</dog1></dog>
<ele><ele1>E</ele1></ele>
</root>
I don't know about the specifics of the parser you are using, but this is an intrinsic XML issue.

Answer 2

You can use below sample code.
resultArray = [[NSMutableArray alloc] init];
NSXMLParser *parser = [[NSXMLParser alloc] initWithData:webData];
[parser setDelegate:self];
[parser parse];
delegate methods to parse XML data
- (void)parser:(NSXMLParser *)parser parseErrorOccurred:(NSError *)parseError{
NSLog(#"error occured %#",parseError);
}
- (void)parserDidStartDocument:(NSXMLParser *)parser{
NSLog(#"Did Start Document");
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict{
self.currentElement = elementName;
if([elementName isEqualToString:#"root"] && !itemDictionary){
self.itemDictionary = [[NSMutableDictionary alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
[itemDictionary setObject:string forKey:currentElement];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{
if([elementName isEqualToString:#"root"] && itemDictionary)){
[resultArray addObject:itemDictionary];
currentItem = nil;
}
}
- (void)parserDidEndDocument:(NSXMLParser *)parser{
NSLog("After parsing : %#", resultArray);
}

Answer 3

itemDictionary is a NSMutableDictionary.
I have edited my previous answer. (currentItem is itemDictionary).
In this sample code, itemDictionary is to store all values with key (when we parsing the data).
itemDictionary - {
apple1 = A
ball1 = B
cat1 = C
dog1 = D
ele1 = E
}
//--------------------------
<?xml version="1.0"?>
<root>
<apple id='10'><apple1>A</apple1></apple>
<ball><ball1>B</ball1></ball>
<cat><cat1>C</cat1></cat>
<dog><dog1>D</dog1></dog>
<ele><ele1>E</ele1></ele>
<root>
In didStartElement method, you have to use below sample code.
if([elementName isEqualToString:#"apple"]){
NSString *attributeValue = [attributeDict objectForKey:#"id"];
NSLog("Attribute value : %#", attributeValue);
}
I hope, it will help you.