NSMutableSet Core Data (merged)

i using core data , set 1 many relationship 1 of entities. have 2 entities. "team" , "player" trying add nsmutableset of players team.

below how attempting add player team.

code:

      -(void)addplayerbutton {            [_tempset addobject:@""];            nslog(@"number of cells in _tempset is:%i",[_tempset count]);            [self.tableview reloadsections:[nsindexset indexsetwithindex:1]  withrowanimation:uitableviewrowanimationfade];             }  

this how saving

code:

      -(void)savebuttonwaspressed {            self.team =[nsentitydescription insertnewobjectforentityforname:@"team" inmanagedobjectcontext:self.managedobjectcontext];          self.player = [nsentitydescription insertnewobjectforentityforname:@"player" inmanagedobjectcontext:self.managedobjectcontext];      [team addplayersobject:player];            team.schoolname = _schoolname.text;      team.teamname = _teamname.text;      team.teamid = _teamname.text;      team.season =  _season.text;      team.headcoach = _headcoach.text;      team.astcoach = _assistantcoach.text;            player.firstname = cell.playerfirstname.text;      player.lastname = cell.playerlastname.text;      player.number  = cell.playernumber.text;            [self.team addplayers:_tempset];              [self.managedobjectcontext save:nil];      [self.navigationcontroller popviewcontrolleranimated:yes];      }  

there 2 things going wrong, one, _tempset adds 1 object , can not add anymore. , second crashes when click save right before line [self.team addplayers:_tempset]; error [__nscfconstantstring _iskindofentity:]: unrecognized selector sent instance 0xd7cd8'

relatively new core data please feel free correct me if doing else wrong...

 

filling tableview nsmutableset

hi using core data , trying populate tableview nsmutableset. have 2 entities, teams , players. on addteamscontroller saving player team follows

code:

      -(void)savebuttonwaspressed {            self.team =[nsentitydescription insertnewobjectforentityforname:@"team" inmanagedobjectcontext:self.managedobjectcontext];            player *newplayer = (player *)[nsentitydescription insertnewobjectforentityforname:@"player"                                                                   inmanagedobjectcontext:self.managedobjectcontext];      team.schoolname = _schoolname.text;      team.teamname = _teamname.text;      team.teamid = _teamname.text;      team.season =  _season.text;      team.headcoach = _headcoach.text;      team.astcoach = _assistantcoach.text;              **[self.team addplayers:_tempset];**        [self.managedobjectcontext save:nil];      [self.navigationcontroller popviewcontrolleranimated:yes];      }  

on viewcontroller trying populate tableview teams players. doing follows

code:

          nssortdescriptor *sortdescriptor = [[nssortdescriptor alloc] initwithkey:@"firstname" ascending:no];      nsarray *sortdescriptors = [[nsarray alloc] initwithobjects:sortdescriptor, nil];      _array = [[_team.players allobjects] sortedarrayusingdescriptors:sortdescriptors];  

and on cell row , index path doing following

code:

          cell.textlabel.text = [_array objectatindex:indexpath.row];  

and error

code:

      [player  isequaltostring:]: unrecognized selector sent instance  

i wondering best approach filling tableview sorted players first names is.

 

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