UISegmentedControl using Two UITableView on UINavigationController bar title

@property (nonatomic, retain, readwrite) UISegmentedControl * segmentedControl;

-(void)viewWillAppear:(BOOL)animated

{

    [[self navigationController] setNavigationBarHidden:NO animated:NO];

    [super viewWillAppear:animated];

    

    NSArray * segmentItems = [NSArray arrayWithObjects: @"First", @"Second", nil];

    self.segmentedControl = [[[UISegmentedControl alloc] initWithItems: segmentItems] retain];

    self.segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;

    self.segmentedControl.selectedSegmentIndex = 0;

    [self.segmentedControl addTarget: self action: @selector(onSegmentedControlChanged:) forControlEvents: UIControlEventValueChanged];

    self.navigationItem.titleView = segmentedControl;

}

- (void) onSegmentedControlChanged:(UISegmentedControl *) sender {

    if (self.segmentedControl.selectedSegmentIndex == 0) {

        rsvpinvitationTable.hidden = YES;

        rsvpTable.hidden = NO;

    }else{

        rsvpTable.hidden = YES;

        rsvpinvitationTable.hidden = NO;

    }

}