uitableview - iOS search result duplicate -

i have uitableview filled songs taken server. loading songs 10 10 when scroll tableview. wanted add search functionality this. used uitextfield. how implemented searching.

in viewdidload

[[nsnotificationcenter defaultcenter]  addobserver:self  selector:@selector(textfieldtextdidchangeoneci:)  name:uitextfieldtextdidchangenotification  object:srchtextbox];    -(void)textfieldtextdidchangeoneci:(nsnotification *)notification {   [nsobject cancelpreviousperformrequestswithtarget:self                                          selector:@selector(getartistsongs)                                            object:nil];  [nsobject cancelpreviousperformrequestswithtarget:self                                          selector:@selector(searchlocalsong)                                            object:nil];    currentsrchstr = srchtextbox.text; songstable.hidden=yes; loading=yes; songarray=[[nsmutablearray alloc]init]; datacamenull=no; startrec=0;  if (dm.isfromlocal) {     [self performselectorinbackground:@selector(searchlocalsong) withobject:nil]; } else {      [self performselectorinbackground:@selector(getartistsongs) withobject:nil]; }    } 

my getartistsongs method

-(void)getartistsongs { nsmutablearray *newsongarray; if(dm.isfromlocal) {     newsongarray=[dbaccess getlocalplaylistsongs:lblartistname.text];     [songarray removeallobjects]; }  else {     newsongarray=[ws getplaylistsongsbypage:selectedplaylistid :currentsrchstr :0 :0 :0 :0 :startrec :reccount]; }    if (newsongarray!=nil) {     [songarray addobjectsfromarray:newsongarray];  } else {     songcamenull=yes; }  [self performselectoronmainthread:@selector(songsloaded) withobject:nil waituntildone:no]; } 

then

-(void)songsloaded{  loading=no; [mainactivityindicator stopanimating];  [songstable reloaddata]; songstable.hidden=no; songstable.tablefooterview = [[uiview alloc] initwithframe:cgrectzero]; } 

my problem results getting duplicate.songs searching correctly. if there song called 'song abc' duplicates several times.when check songarray in log cat, contains same song multiple times. should reason this. please me. thanks

possibly problem might in else case, not flush songarray contents:

-(void)getartistsongs { nsmutablearray *newsongarray; if(dm.isfromlocal) {     newsongarray=[dbaccess getlocalplaylistsongs:lblartistname.text];     [songarray removeallobjects]; }  else {     newsongarray=[ws getplaylistsongsbypage:selectedplaylistid :currentsrchstr :0 :0 :0 :0 :startrec :reccount];      [songarray removeallobjects];  // <---------- here }