ios - empty tableview rows when parsing with NSXMLPaerser using ASIHTTPRequest -

i'm pretty new iphone development , have problem. after several hours of searching , digging in code understand source of problem (hope) not know how solve it. problem tableview cells loads before parser finish "[array count]" nil. when set 'number of rows in section' manually, table appear, after few sec , scrolling , down.

i have 2 classes, 1 xmlparser , 1 show tableview. according read before opened question need reload tavleview data becuase have 2 various classes dont know how that. ideas?

thanks in davance!

here xmlparser code:

- (void)parserdidstartdocument:(nsxmlparser *)parser {      self.titles = [[nsmutablearray alloc]init];     self.descriptions = [[nsmutablearray alloc]init];     self.links = [[nsmutablearray alloc]init];     self.pubdate = [[nsmutablearray alloc]init];  }  - (void)parserdidenddocument:(nsxmlparser *)parser {  }  bool isitem = no; bool istitle = no; bool isdesription = no; bool isimg = no; bool ispubdate = no;  - (void)parser:(nsxmlparser *)parser didstartelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname attributes:(nsdictionary *)attributedict {     if ([elementname isequaltostring:@"item"]) {         isitem = yes;     }      if ([elementname isequaltostring:@"title"]) {         istitle=yes;         self.titlesstring = [[nsmutablestring alloc]init];     }      if ([elementname isequaltostring:@"description"]) {         isdesription = yes;         self.descriptionstring = [[nsmutablestring alloc]init];;         self.data = [nsmutabledata data];     }     if ([elementname isequaltostring:@"pubdate"]) {         ispubdate = yes;         self.pubdatestring = [[nsmutablestring alloc]init];     }  }  - (void)parser:(nsxmlparser *)parser foundcharacters:(nsstring *)string{     if(isitem && istitle){         [self.titlesstring appendstring:string];     }     if (isitem && isdesription) {         [self.descriptionstring appendstring:string];     }     if (isitem && ispubdate) {         [self.pubdatestring appendstring:string];     }   }  - (void)parser:(nsxmlparser *)parser foundcdata:(nsdata *)cdatablock {     if (self.data)         [self.data appenddata:cdatablock];  }   - (void)parser:(nsxmlparser *)parser didendelement:(nsstring *)elementname namespaceuri:(nsstring *)namespaceuri qualifiedname:(nsstring *)qname {        if ([elementname isequaltostring:@"item"]) {         isitem = no;            [self.titles addobject:self.titlesstring];         [self.descriptions addobject:self.descriptionstring];         [self.pubdate addobject:self.pubdatestring];         nslog(@"%@,%@,%@,",self.titlesstring,self.descriptionstring,self.pubdate);      }      if ([elementname isequaltostring:@"title"]) {         istitle=no;      }     if ([elementname isequaltostring:@"description"]) {         isdesription = no;           if ([self.data length] > 0)         {             nsstring *htmlsnippet = [[nsstring alloc] initwithdata:self.data encoding:nsutf8stringencoding];             nsstring *imagesrc = [self firstimgurlstring:htmlsnippet];             [self.links addobject:imagesrc];         }          self.data = nil;     }      if([elementname isequaltostring:@"pubdate"])         ispubdate = no; }  - (nsstring *)firstimgurlstring:(nsstring *)string {     nserror *error = null;     nsregularexpression *regex = [nsregularexpression regularexpressionwithpattern:@"(<img\\s[\\s\\s]*?src\\s*?=\\s*?['\"](.*?)['\"][\\s\\s]*?>)+?"                                                                            options:nsregularexpressioncaseinsensitive                                                                              error:&error];      nstextcheckingresult *result = [regex firstmatchinstring:string                                                      options:0                                                        range:nsmakerange(0, [string length])];      if (result)         return [string substringwithrange:[result rangeatindex:2]];      return nil;  } 

and here's show tableview code:

- (void)viewdidload {     [super viewdidload];         self.navigationitem.leftbarbuttonitem = [[uibarbuttonitem alloc] initwithimage:[uiimage imagenamed:@"menubutton.png"] style:uibarbuttonitemstylebordered target:self.viewdeckcontroller action:@selector(toggleleftview)];      nsurl *url;      if (!self.isgetlink)         url = [nsurl urlwithstring:@"http://www.ynet.co.il/integration/storyrss2.xml"];     else         url = [nsurl urlwithstring:self.linkforparsingstring];       if (!self.xmlparser) {         self.xmlparser = [[xmlparser alloc]init];          [self.xmlparser loadxmlwithurl:url];     }      self.isgetlink = no; }   - (void)didreceivememorywarning {     [super didreceivememorywarning];     // dispose of resources can recreated. }  #pragma mark - table view data source  - (nsinteger)numberofsectionsintableview:(uitableview *)tableview {      // return number of sections.     return 1; } - (void)registernib:(uinib *)nib forcellreuseidentifier:(nsstring *)identifier {  } - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {     // return number of rows in section.     return [self.xmlparser.titles count]; }  - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {       static nsstring *cellidentifier = @"customcell";     customcell *cell = (customcell*) [tableview dequeuereusablecellwithidentifier:cellidentifier];     if (cell == nil)     {         nsarray *nib = [[nsbundle mainbundle] loadnibnamed:@"customcell" owner:self options:nil];         cell = [nib objectatindex:0];      }      cell.lbltitle.text = [self.xmlparser.titles objectatindex:indexpath.row];     cell.lbltitle.font = [uifont boldsystemfontofsize:[uifont systemfontsize]];     nsdata *data = [nsdata datawithcontentsofurl:[nsurl urlwithstring:[self.xmlparser.links objectatindex:indexpath.row]]];     cell.imgview.image = [uiimage imagewithdata:data];       return cell; } - (cgfloat)tableview:(uitableview *)tableview heightforrowatindexpath:(nsindexpath *)indexpath {     return 82; }   #pragma mark - table view delegate nsstring *curnentdes; nsstring *currenttitle; nsstring *currentpubdate;  - (void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath {      readviewcontroller *rvc = [[readviewcontroller alloc]initwithnibname:@"readviewcontroller" bundle:nil];     curnentdes = [self.xmlparser.descriptions objectatindex:indexpath.row];     currenttitle = [self.xmlparser.titles objectatindex:indexpath.row];      currentpubdate = [self.xmlparser.pubdate objectatindex:indexpath.row];     nsdateformatter *inputformatter = [[nsdateformatter alloc]init];      [inputformatter setdateformat:@"eee, dd mmm yyyy hh:mm:ss z"];     nsdate *inputdate = [inputformatter datefromstring:currentpubdate];     nsdateformatter *outputformatter = [[nsdateformatter alloc]init];     [outputformatter setdateformat:@"dd/mm/yyyy hh:mm"];     nsstring *outputdate = [outputformatter stringfromdate:inputdate];      rvc.description = curnentdes;     rvc.stitle = currenttitle;     rvc.pubdate = outputdate;       [self.navigationcontroller pushviewcontroller:rvc animated:yes];  } 

pretty simple reload table after parsing done, go. reason data comes after scrolling array updated @ later point , cellforrowatindex called , array has content see rows.

note: cellforrow called every row (hope know that).

using notification:

in parser class

- (void)parserdidenddocument:(nsxmlparser *)parser {    [[nsnotificationcenter defaultcenter ]postnotificationname:@"parsingcomplete" object:nil]; } 

in viewdidload of table view class add code , add other functions anywhere in ur class:

your viewdidload(edited)

- (void)viewdidload { [super viewdidload];  [[nsnotificationcenter defaultcenter] addobserver:self selector:@selector(parsingcomplete) name:@"parsingcomplete" object:nil];  self.navigationitem.leftbarbuttonitem = [[uibarbuttonitem alloc] initwithimage:[uiimage imagenamed:@"menubutton.png"] style:uibarbuttonitemstylebordered target:self.viewdeckcontroller action:@selector(toggleleftview)];  nsurl *url;  if (!self.isgetlink)     url = [nsurl urlwithstring:@"http://www.ynet.co.il/integration/storyrss2.xml"]; else     url = [nsurl urlwithstring:self.linkforparsingstring];   if (!self.xmlparser) {     self.xmlparser = [[xmlparser alloc]init];      [self.xmlparser loadxmlwithurl:url]; }  self.isgetlink = no; } 

//function handle notification:

-(void)parsingcomplete  {   nslog(@"parsing results: %@",self.xmlparser.titles);     //change tableviewname    [yourtableview reloaddata];  } 

//removing notification:

 -(void)dealloc  {  [[nsnotificationcenter defaultcenter] removeobserver:self];  }