iphone - iOS: button in UITableViewCell class to call method on main UIViewController -

i have uitableview on mainviewcontroller has custom uitablecells defined in customcell class. need uibutton, in customcell class, call method in mainviewcontroller. cannot create new instance of mainviewcontroller because method uses variables in default state if created new instance. do??

this code:

mainviewcontroller.m (this method want called):

-(void)updatelabels{    double totalvalue=0, personvalue=0;     [self returntickarray];     for(nsinteger = 0; < n; i++) {         totalvalue += ([[[self returnpricesarray] objectatindex:i] doublevalue] * [[[self returnqtyarray] objectatindex:i]doublevalue]);         if([[[self returnpeoplearray] objectatindex:i]doublevalue]>0) personvalue += ([[[self returnpricesarray] objectatindex:i] doublevalue] * [[[self returnqtyarray] objectatindex:i]doublevalue]/ [[[self returnpeoplearray] objectatindex:i]doublevalue] * [[[self returntickarray] objectatindex:i]doublevalue]);     }     _totalvalue.text = [nsstring stringwithformat:@"$ %.02lf", totalvalue];     _tip.text= [nsstring stringwithformat:@"$ %.02lf", totalvalue*(([_tippercentage.text doublevalue]/100))];     _addedvalue.text= [nsstring stringwithformat:@"$ %.02lf",([[_tip.text substringfromindex:2] doublevalue]+totalvalue) ];     _perperson.text=[nsstring stringwithformat:@"$ %.02lf", personvalue]; } 

this method in customcell.m gets called when press button:

- (ibaction)tick:(uibutton *)sender {      if ([sender isselected]) {         [sender setimage:[uiimage imagenamed:@"off"] forstate:uicontrolstatenormal];         [sender setselected:no];         _isticked = [nsnumber numberwithint:0];     }     else {         [sender setimage:[uiimage imagenamed:@"on"] forstate:uicontrolstateselected];         [sender setselected:yes];         _isticked = [nsnumber numberwithint:1];     }  } 

you can assign method controller button uitableview in - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath method

[cell.yourbutton addtarget:self action:@selector(updatelabels) forcontrolevents:uicontroleventtouchupinside]; 

(just don't forget add iboutlet of button custom cell class)