array data from json duplicated on tableview ios -


i'm displaying data webservice in tableview app array twice in tableview. i'm trying use endless scroll show paginated data without success 

 (void)viewdidload { [super viewdidload];  self.articlesarray = [[nsmutablearray alloc] init]; [self fetchdata:1];  }

my function fetch data 

-(void) fetchdata:(int)page { nsstring *urlstring = [nsstring                        stringwithformat:@"http://url?page=%d", (int)page]; nsurlrequest *request = [[nsurlrequest alloc] initwithurl:[nsurl urlwithstring:urlstring]]; nsdata *thedata = [nsurlconnection sendsynchronousrequest:request                                         returningresponse:nil                                                     error:nil];  self.articlesarray = [nsjsonserialization jsonobjectwithdata:thedata                                                      options:nsjsonreadingmutablecontainers                                                        error:nil];  [self.tableview registernib:[uinib nibwithnibname:@"articlecell" bundle:nil] forcellreuseidentifier:@"articlecell"]; }

and here's tableview methods please see did wrong 

- (nsinteger)numberofsectionsintableview:(uitableview *)tableview {  return 2; }  - (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {  if (section==0)  {  return [self.articlesarray count]; else  return [self.articlesarray count]; } //  return [self.articlesarray count];  }  - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {  nsinteger row = [indexpath row];  if (3 == (row % 4)) {  // or 0 == if  want first cell ad! static nsstring *myidentifier = @"adcell"; adviewcell  *cell = (adviewcell *)[tableview dequeuereusablecellwithidentifier:myidentifier]; if ((cell == nil) || (![cell iskindofclass: adviewcell.class])) { nsarray *nib = [[nsbundle mainbundle] loadnibnamed:@"adcell" owner:self options:nil]; cell = [nib objectatindex:0]; cell = [[adviewcell alloc] initwithstyle:uitableviewcellstyledefault                                reuseidentifier:myidentifier] ;  }    gadbannerview *bannerview = [[gadbannerview alloc] initwithadsize:kgadadsizemediumrectangle];   bannerview.adunitid =@"";  bannerview.rootviewcontroller =self;  gadrequest *request = [gadrequest request];  [bannerview loadrequest:request];   [cell.contentview addsubview:bannerview];   return cell; }  else{ static nsstring *simpletableidentifier = @"articlecell"; articleviewcell *cell = (articleviewcell *)[tableview dequeuereusablecellwithidentifier:simpletableidentifier ]; if ((cell == nil) || (![cell iskindofclass: articleviewcell.class])) { nsarray *nib = [[nsbundle mainbundle] loadnibnamed:@"articlecell" owner:self options:nil]; cell = [nib objectatindex:1]; cell = [[articleviewcell alloc] initwithstyle:uitableviewcellstyledefault                               reuseidentifier:simpletableidentifier] ; } nsdictionary * tempdictionary = [self.articlesarray objectatindex:indexpath.row];  nsstring *imageurl = [[self.articlesarray objectatindex:indexpath.row]objectforkey:@"featured_image"];  imageurl = [imageurl stringbyaddingpercentescapesusingencoding:nsutf8stringencoding];  [cell.thumbnailimageview sd_setimagewithurl:[nsurl urlwithstring:imageurl ] placeholderimage:nil options:sdwebimageretryfailed completed:^(uiimage *image, nserror *error, sdimagecachetype cachetype, nsurl *imageurl) { if (image){     // set image on here }else{     //something went wrong     nslog(@"error occured : %@", [error description]); }  }]; nsstring * title=[tempdictionary valueforkeypath:@"title.rendered"];  cell.titlelabel.text = title;  return cell; }   }

you can remove duplicate values once response json, before reload tableview remove duplicate elements array 

nsorderedset *orderedset = [nsorderedset orderedsetwitharray:yourarray];  nsarray *arraywithoutduplicates = [orderedset array];

thanks


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