NSDictionary within a NSDictionary - iphone

Question

At the moment i've got the following code to get data from an xml file. This works so far
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
attributes:(NSDictionary *)attributeDict{
currentElement = [elementName copy];
if ([elementName isEqualToString:#"Placemark"]) {
placemarkData = [[NSMutableDictionary alloc] init];
currentTitle = [[NSMutableString alloc] init];
}
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
if ([currentElement isEqualToString:#"name"])
[placemarkData addObject:string forKey:currentElement];
if ([currentElement isEqualToString:#"address"])
[placemarkData addObject:string forKey:currentElement];
if ([currentElement isEqualToString:#"coordinates"])
[placemarkData addObject:string forKey:currentElement];
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName{
if ([elementName isEqualToString:#"Placemark"]) {
[Placemarks addObject:[placemarkData copy]];
NSString *batsen = [placemarkData objectForKey:#"name"];
NSLog(#"adding story: %#", batsen);
}
}
This dictionary will be loaded into a array. Problem is that where this array got loaded in need to find the right entry in the array. I do it like this
TabbedCalculationAppDelegate *appDelegate = (TabbedCalculationAppDelegate *)[[UIApplication sharedApplication] delegate];
NSArray *jean = appDelegate.Placemarks;
NSDictionary *boekje = [jean objectAtIndex:1];
NSString *coordinaten = [boekje objectForKey:#"coordinates"];
NSString *naam = [boekje objectForKey:#"name"];
NSLog(#"poep: %#" , naam);
NSLog(#"wwhoppa: %#", coordinaten);
titel.text = coordinaten;
But since arrays works with index I can't find a way to get the right entry. To clarify, a user clicks in a mapview on an annotation. This annotation then gets the corresponding detailview. The detailview can check which annotation is clicked by the view.annotation.title;
So I actually need a dictionary in a dictionary with name as key in the root dictionary. Is this possible? and on what way I can implement this?
Is this a little bit clear? Else just ask!
Thnx guys

Answer 1

Yes, this is a good idea. Just pass the 'inner' dictionary as the object parameter to setObject:forKey: on the 'outer' dictionary. It'll just work. For example:
NSMutableDictionary *outer=[[NSMutableDictionary alloc] init];
NSDictionary *inner=[NSDictionary dictionaryWithObject:#"hello" forKey:#"world"];
[outer setObject:inner forKey:#"greetings"];