objective c - iOS UItableView remove object from array by index path -

i have custom contact book sorted a-z sections. trying add array selected contacts

- (void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath {  nsmutabledictionary *contactinfo = [nsmutabledictionary new];  cell *cell = (cell *)[self.conttableview cellforrowatindexpath:indexpath];  //nslog(@"cell %@", cell.contact.fullname);  if (!cell.contact.contactchecked) {      cell.contactimage.image = [uiimage imagenamed:@"cell_blue_circle.png"];     cell.contact.contactchecked = yes;     //nslog(@"did select %@", cell.contact.fullname);     nslog(@"index checked row %d section %d", indexpath.row, indexpath.section);     [contactinfo setvalue:cell.contact.fullname forkey:@"name"];     [contactinfo setvalue:cell.contact.numbers.firstobject forkey:@"phone"];      [self.seletedpeople insertobject:contactinfo atindex:indexpath.row];  } else {      nslog(@"index unchecked row %d section %d", indexpath.row, indexpath.section);     cell.contactimage.image = [uiimage imagenamed:@"cell_gray_circle.png"];     cell.contact.contactchecked = no;     [self.seletedpeople removeobjectatindex:indexpath.row]; }  nslog(@"dict selected %@", self.seletedpeople); 

}

what happens, in cell app crashing error

* terminating app due uncaught exception 'nsrangeexception', reason: '* -[__nsarraym insertobject:atindex:]: index 1 beyond bounds empty array' *** first throw call stack: (0x29c02fef 0x38150c8b 0x29b1cf8f 0xf7fe9 0x2d36e56b 0x2d41d43b 0x2d2d2a91 0x2d24d38f 0x29bc8fed 0x29bc66ab 0x29bc6ab3 0x29b13201 0x29b13013 0x313f2201 0x2d2b7a59 0x10c075 0x386dcaaf) libc++abi.dylib: terminating uncaught exception of type nsexception

update:

- (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {  static nsstring *cellid = @"cell"; cell *cell = [tableview dequeuereusablecellwithidentifier:cellid forindexpath:indexpath];  if (searchresults) {      //nslog(@"cell %@", cell.contact.fullname);     contact = [searchresults objectatindex:indexpath.row];     cell.contact = contact;     cell.firstnamelabel.text = contact.fullname;     cell.avatar.image = contact.image;     cell.avatar.layer.bordercolor = [uicolor graycolor].cgcolor;     cell.avatar.layer.borderwidth = 0.5;     cell.avatar.layer.cornerradius = 25.0;     cell.avatar.layer.maskstobounds = yes;     cell.number.text = contact.numbers.firstobject;  } else {      nsstring *sectiontitle = [[[namesdictionary allkeys] sortedarrayusingselector:@selector(localizedcaseinsensitivecompare:)]                               objectatindex:indexpath.section];     nsarray *sectioncontacts = [namesdictionary objectforkey:sectiontitle];     contact = [self getcontactfromarray:[sectioncontacts objectatindex:indexpath.row]];      cell.firstnamelabel.text = [sectioncontacts objectatindex:indexpath.row];      cell.avatar.image = contact.image;     cell.avatar.layer.bordercolor = [uicolor graycolor].cgcolor;     cell.avatar.layer.borderwidth = 0.5;     cell.avatar.layer.cornerradius = 25.0;     cell.avatar.layer.maskstobounds = yes;     cell.number.text = contact.numbers.firstobject;      cell.contact = contact;      cell.tag = indexpath.row; }  if (contact.contactchecked) {     cell.contactimage.image = [uiimage imagenamed:@"cell_blue_circle.png"]; } else {     cell.contactimage.image = [uiimage imagenamed:@"cell_gray_circle.png"];  }   return cell; 

}

the way use in such cases. create model class , load tableview models. when select cell or deselect cell. add model in array. after when de select selected cell, can same model indexpath.row , can use nsarray method fetch model in selected array , remove there. fix issue can use indexpath.row key in dictionary during selection. after when deselect cell use predicate added dictionary array using store selected ones. once find delete array.