objective c - Trouble Parsing XML and fetching data -

i have need parse following xml webservicex.net, , iphone app. need store verse verse , biblewords nsarray/nsdictionary or something.

<string xmlns="http://www.webservicex.net"> <newdataset>   <table>     <book>1</book>     <booktitle>genesis</booktitle>     <chapter>1</chapter>     <verse>1</verse>     <biblewords>in beginning god created heaven , earth.</biblewords>   </table>   <table>     <book>1</book>     <booktitle>genesis</booktitle>     <chapter>1</chapter>     <verse>2</verse>     <biblewords>and earth without form, , void; , darkness upon face of deep. , spirit of god moved upon face of waters.</biblewords>   </table>   <table>     <book>1</book>     <booktitle>genesis</booktitle>     <chapter>1</chapter>     <verse>3</verse>     <biblewords>and god said, let there light: , there light.</biblewords>   </table>   <table>     <book>1</book>     <booktitle>genesis</booktitle>     <chapter>1</chapter>     <verse>4</verse>     <biblewords>and god saw light, good: , god divided light darkness.</biblewords>   </table> </newdataset> </string> 

i wrote following code parsing data.

- (void)parser:(nsxmlparser *)parser didstartelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname attributes:(nsdictionary *)attributedict {     if ([elementname isequaltostring:@"string"]) {         model = [[model alloc]init];             } }  - (void)parser:(nsxmlparser *)parser foundcharacters:(nsstring *)string {     if(!currentelementvalue) {         currentelementvalue = [[nsmutablestring alloc]initwithstring:string];     }      else {         [currentelementvalue appendstring:string];     }      nslog(@"%@", currentelementvalue); }  - (void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname {     if ([elementname isequaltostring:@"newdataset"]) {         return;     }      if ([elementname isequaltostring:@"table"]) {         [verses addobject:model];         model = nil;     }     else {         [model setvalue:currentelementvalue forkey:elementname]; //the exception break point hits here     }          currentelementvalue = nil; } 

the currentelementvalue displayed correctly. model , object of class named model, currentelementvalue nsmutablestring object verses nsmutablearray. beginner in objective c , haven't done parsing before. problem method:

- (void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname 

is not working expected. app got broken after hitting exception break point have commented in code. how can value of verse , biblewords , store nsarray/nsmutablearray/nsdictionary/nsmutabledictionary. please ask if there else need mention see problem lies.

edit:

tried this:

- (void)parser:(nsxmlparser *)parser didstartelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname attributes:(nsdictionary *)attributedict {     capturecharacters = no;     [currentelementvalue setstring : @""];     if ([elementname isequaltostring:@"table"]) { //set break point here well. elementname string , hence not entering of conditions in delegate method. hence capturecharacters set no , nothing working.         model = [[model alloc]init];             }     else if ([elementname isequaltostring:@"verse"]) {        capturingcharacters = yes;     }      else if ([elementname isequaltostring:@"biblewords"]) {        capturingcharacters = yes;     } }  - (void)parser:(nsxmlparser *)parser foundcharacters:(nsstring *)string {     if(capturingcharacters) {         [currentelementvalue appendstring:string];     }  }  - (void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname {     if ([elementname isequaltostring:@"table"]) {         [array addobject : model];         model = nil;             }     else if ([elementname isequaltostring:@"verse"]) { //set break point here        model.verse = currentelementvalue; //not entering condition     }      else if ([elementname isequaltostring:@"biblewords"]) {        model.biblewords = currentelementvalue; //not entering condition     }           } 

it not working , getting null values model.verse , model.biblewords. how these methods work?

edit-2
model interface:

//model.h @protocol httprequesthandler <nsobject>  - (void)returnfromsiteparseddata:(nsmutablearray *)parseddata;  @end  @interface model : nsobject <nsurlconnectiondelegate, nsxmlparserdelegate> {     nsstring *urltoload;     nsmutableurlrequest *requestsitetosenddata;     nsurlconnection *connectiontositetosenddata;      nsstring *versetext;     int versenumber;  } @property(nonatomic, retain) nsstring *versetext; @property(nonatomic, assign) int versenumber;  - (void)loadsitetosenddatawithchapternumber:(int)chapternumber andbooknumber:(int)booknumber;  @property(nonatomic, retain)id<httprequesthandler>httprequesthandlerdelegate;  @end 

model implementation

//model.m @implementation model  @synthesize versenumber; @synthesize versetext;  - (void)loadsitetosenddatawithchapternumber:(int)chapternumber andbooknumber:(int)booknumber {      urltoload = [[nsstring alloc]initwithformat:@"http://www.webservicex.net/biblewebservice.asmx/getbiblewordsbybooktitleandchapter?booktitle=genesis&chapter=1"];     requestsitetosenddata = [nsmutableurlrequest requestwithurl:[[nsurl alloc]initwithstring:urltoload] cachepolicy:nsurlrequestreloadignoringcachedata  timeoutinterval:30];     connectiontositetosenddata = [[nsurlconnection alloc]initwithrequest:requestsitetosenddata delegate:self];      }  - (void)connection:(nsurlconnection *)connection didreceivedata:(nsdata *)data {      // parse xml dictionary     nsxmlparser *parser = [[nsxmlparser alloc]initwithdata:data];     vbsparser *vbsparser = [[vbsparser alloc]initvbsparser];     [parser setdelegate:vbsparser];     bool success = [parser parse];      if (success) {         nsmutablearray *verses = [vbsparser verses];         nslog(@"%@", verses);         nslog(@"number: %d\n text: %@", versenumber,versetext);         [self.httprequesthandlerdelegate returnfromsiteparseddata:verses];     }     // print dictionary  }  @end 

a delegate used return parsed data view controller.

make bool capturingcharacters;

- (void)parser:(nsxmlparser *)parser didstartelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname attributes:(nsdictionary *)attributedict {     capturecharacters = no;     [currentelementvalue setstring : @""];     if ([elementname isequaltostring:@"table"]) {         model = [[model alloc]init];             }     else if ([elementname isequaltostring:@"verse"]) {        capturingcharacters = yes;     }      else if ([elementname isequaltostring:@"biblewords"]) {        capturingcharacters = yes;     } }  - (void)parser:(nsxmlparser *)parser foundcharacters:(nsstring *)string {     if(capturingcharacters) {         [currentelementvalue appendstring:string];     }  }  - (void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname {     if ([elementname isequaltostring:@"table"]) {         [array addobject : model];         model = nil;             }     else if ([elementname isequaltostring:@"verse"]) {        model.verse = currentelementvalue;     }      else if ([elementname isequaltostring:@"biblewords"]) {        model.biblewords = currentelementvalue;     }           }