Button in UIPageViewController

I want to add a UIButton to my UIViewController. I have a UIPageViewController on all screens. When I try to add this button ... there is no button on the screen. What am I doing wrong?

CODE:

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button addTarget:self
               action:@selector(setButtonVisibleClose:)
     forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:@"Zamknij widok" forState:UIControlStateNormal];
    button.frame = CGRectMake(80.0, 210.0, 160.0, 40.0);
    button.backgroundColor = [UIColor whiteColor];
    [self.view addSubview: button];


    self.pageController = [[UIPageViewController alloc] initWithTransitionStyle:UIPageViewControllerTransitionStyleScroll navigationOrientation:UIPageViewControllerNavigationOrientationHorizontal options:nil];

    self.pageController.dataSource = self;
    [[self.pageController view] setFrame:[[self view] bounds]];

    BasicViewViewController *initialViewController = [self viewControllerAtIndex:0];

    [initialViewController setImageViewToDisplay];

    NSArray *viewControllers = [NSArray arrayWithObject:initialViewController];

    [self.pageController setViewControllers:viewControllers direction:UIPageViewControllerNavigationDirectionForward animated:NO completion:nil];

    [self addChildViewController:self.pageController];
    [[self view] addSubview:[self.pageController view]];
    [self.pageController didMoveToParentViewController:self];