ahmettkeskin / carouselnotificationexample Goto Github PK

var xPos: CGFloat
var yPos: CGFloat
let height: CGFloat = 30
let pageControl = UIPageControl()
pageControl.addTarget(self, action: #selector(self?.changePage(sender:)), for: .touchUpInside)
pageControl.hidesForSinglePage = true
pageControl.numberOfPages = 4
pageControl.currentPage = 0
xPos = (self.view.frame.width - width) / 2
yPos = (self.view.frame.height - height) - 10
pageControl.frame = CGRect(x: xPos, y: yPos, width: width, height: height)
self?.pageControl?.removeFromSuperview()
self?.pageControl = pageControl
Following are the attributes that I have for this view.

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
    pageControl?.currentPage = Int(scrollView.contentOffset.x) / Int(scrollView.frame.width)
    currentIndex = pageControl?.currentPage ?? 0
}

if response.actionIdentifier == "carousel.next" {
    if ((self.pageControl?.currentPage ?? 0) + 1) <  4) {
        self.pageControl?.currentPage += 1
        changePage(sender: self.pageControl)
    }
} else if response.actionIdentifier == "carousel.previous" {
    if ((self.pageControl?.currentPage ?? 0) - 1) <  4) {
        self.pageControl?.currentPage -= 1
        changePage(sender: self.pageControl)
    }
}

func changePage(sender: UIPageControl) {
    let pageCount = datahandler.carousalInfo?.data?.count ?? 0
    guard pageCount > 1 else {
        return
    }
    if sender.currentPage != currentIndex {
        currentIndex = sender.currentPage
        let indexPath = IndexPath(item: currentIndex, section: 0)
        self.carousalCollection?.scrollToItem(at: indexPath, at: .centeredHorizontally, animated: true)
    }
}