Change NSDictionary with NSMutableArray value

   NSMutableDictionary *newDict = [[NSMutableDictionary alloc]init];

    NSDictionary *oldDict = (NSDictionary *)[groupsArr objectAtIndex:selectrow];

    [newDict addEntriesFromDictionary:oldDict];

    [newDict setObject:note.object forKey:groupName];

    [groupsArr replaceObjectAtIndex:selectrow withObject:newDict];

    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:selectrow inSection:0];

    NSArray *indexPaths = [[NSArray alloc] initWithObjects:indexPath, nil];

    [self.GroupsTable reloadRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];