How can I retrieve the value by parsing my XML file - ios

Question

I'm trying to gather the data from an XML file and add to an array. The data looks something like this..
<Placemark>
<name><![CDATA[Kingsway (Start)]]></name>
<description><![CDATA[]]></description>
<TimeStamp><when>2014-04-30T17:03:28.681Z</when></TimeStamp>
<styleUrl>#start</styleUrl>
<Point>
<coordinates>-1.408894,52.13977,176.0</coordinates>
</Point>
</Placemark>
<Placemark id="tour">
<name><![CDATA[Kingsway]]></name>
<description><![CDATA[]]></description>
<styleUrl>#track</styleUrl>
<ExtendedData>
<Data name="type"><value><![CDATA[running]]></value></Data>
</ExtendedData>
<gx:MultiTrack>
<altitudeMode>absolute</altitudeMode>
<gx:interpolate>1</gx:interpolate>
<gx:Track>
<when>2014-04-30T17:03:28.681Z</when>
<gx:coord>-1.408894 52.13977 176.0</gx:coord>
<when>2014-04-30T17:03:31.071Z</when>
<gx:coord>-1.407839 52.139166 174.0</gx:coord>
<when>2014-04-30T17:03:32.070Z</when>
<gx:coord>-1.407486 52.138963 175.0</gx:coord>
<when>2014-04-30T17:03:33.073Z</when>
<gx:coord>-1.407142 52.138755 174.0</gx:coord>
<when>2014-04-30T17:03:34.073Z</when>
<gx:coord>-1.406805 52.138555 173.0</gx:coord>
<when>2014-04-30T17:03:35.073Z</when>
<gx:coord>-1.40663 52.138441 173.0</gx:coord>
<when>2014-04-30T17:03:36.601Z</when>
<gx:coord>-1.405929 52.138027 172.0</gx:coord>
<when>2014-04-30T17:03:37.601Z</when>
<gx:coord>-1.405574 52.137817 172.0</gx:coord>
I'm only interested in the values following the tag gx:coord, so I'm parsing the file using the code below.
- (void)loadMap:(NSInteger)selJourney
{
NSString *journey = #"KML_Sample";
NSString *path = [[NSBundle mainBundle] pathForResource:journey ofType:#"kml"];
[self parseXMLFile:path];
}
- (void)parseXMLFile:(NSString *)pathToFile
{
NSXMLParser *addressParser;
[myParser setShouldProcessNamespaces:NO];
[myParser setShouldReportNamespacePrefixes:NO];
[myParser setShouldResolveExternalEntities:NO];
NSURL *xmlURL = [NSURL fileURLWithPath:pathToFile];
myParser = [[NSXMLParser alloc] initWithContentsOfURL:xmlURL];
[myParser setDelegate:self];
[myParser setShouldResolveExternalEntities:YES];
[myParser parse];
}
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI: (NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict
{
if ( [elementName isEqualToString:#"gx:coord"] ) {
polylineList = [[NSMutableArray alloc] init];
}
}
When the parser method runs and it finds the right elementName I want to retrieve the string data after the tag and add it to my NSMutableArray polylineList.
The other parameters in parser all return nil so am I missing something?

Answer 1

I managed to solve this myself using the method below
-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
{
if ((addRec) && (![string isEqualToString:#"\n"]))
{
NSArray *tmpArray = [[NSArray alloc] initWithObjects:string, nil];
if (polylineList.count > 0)
[polylineList addObject:string];
else
polylineList = [[NSMutableArray alloc] initWithArray:tmpArray];
}
}
I hope this is helpful to those who are using KML, MapKit or just parsing XML.