Create Pagin scroll indicator with scroll effect

Pagin scroll

- (void)viewDidLoad
{
    [super viewDidLoad];
   
    _pageControl = [[UIPageControl alloc] init];
    [self.pageControl setCurrentPage:0];
    [self.pageControl setNumberOfPages:6];
    [self.pageControl addTarget:self action:@selector(a_changedPageControl:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:self.pageControl];
    
    [self.scrollView setPagingEnabled:YES];
    [self.scrollView setDelegate:self];
    [self.scrollView setShowsHorizontalScrollIndicator:NO];
    [self.scrollView setShowsVerticalScrollIndicator:NO];
    [self.view addSubview:self.scrollView];
    
}

#pragma mark - UIScrollViewDelegate

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    int pageNum = scrollView.contentOffset.x / scrollView.frame.size.width;
    [self.pageControl setCurrentPage:pageNum];
}

- (void)a_changedPageControl:(UIPageControl *)pageControl
{
    int currentPage       = [pageControl currentPage];
    CGRect rectFoPosition = CGRectMake(self.scrollView.bounds.size.width * currentPage, 0, self.scrollView.bounds.size.width, self.scrollView.bounds.size.height);
    [self.scrollView scrollRectToVisible:rectFoPosition animated:YES];
}