Hide dots on final page of UIPageViewController swift

Question

I have four pages in a UIPageViewController, and I\'d like to hide the dots on the last page. I successfully made a function that gets called on the last page of the UIPageV

Answer 1

Check out the accepted answer here to get the UIPageControl (the view with the dots):

Access the UIPageControl created by iOS6 UIPageViewController?

Then, once you have the pageControl, in pageViewController: didFinishAnimating: you can check if it's the last page, and if so set pageControl.hidden = true.

Answer 2

use the UIPageViewControllerDelegate method:

let pageControl = UIPageControl()

func pageViewController(pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {
    if (index == numberOfPages()-1){
          pageControl.hidden = true
    }else{
          pageControl.hidden = false
    }
}

Answer 3

I found that you can't actually hide the page control as it just never works. But a bit of a hack is to add this to your code:

    func pageViewController(pageViewController: UIPageViewController, willTransitionToViewControllers pendingViewControllers: [UIViewController]) {
        if let lastVC = pendingViewControllers.last?.isKindOfClass(youLastViewController){
            if lastVC == true {
                for view in self.view.subviews {
                    if view is UIScrollView {
                        view.frame = UIScreen.mainScreen().bounds
                    } else if view is UIPageControl {
                        view.center.y = self.view.frame.height * 1.5
                    }
                }
            }else {
                for view in self.view.subviews {
                    if view is UIScrollView {
                        view.frame = UIScreen.mainScreen().bounds
                    } else if view is UIPageControl {
                        view.center.y = self.view.frame.height * 0.92
                    }
                }
            }
        }
    }
}

This actually move the page control of the screen and the same as hiding it.

Answer 4

override func presentationCountForPageViewController(pageViewController: UIPageViewController) -> Int {
    if /*current index is the last one*/ {
        return 0
    } else {
        /*return number of pages*/
    }
}

Answer 5

here is the complete code of UIPageViewController to hide dots from last page it's work fine

first create class for UIViewController and add UIPageViewControllerDelegate , UIPageViewControllerDataSource

create outlet for pageControl

@IBOutlet weak var pageControl: UIPageControl!

create variable for uipagecontroller

var pageControllerContainer : UIPageViewController!

var pages = [UIViewController]()

var currentIndex : Int?

private var pendingIndex : Int?
private var lastIndex : Int?

in ViewDidLoad: add following lines :

 let page1 : UIViewController! = self.storyboard?.instantiateViewController(withIdentifier: "YourFirstPageViewController") as! YourFirstPageViewController
    let page2 : UIViewController! = self.storyboard?.instantiateViewController(withIdentifier: "YourSecondPageViewController") as! YourSecondPageViewController
    let page3 : UIViewController! = self.storyboard?.instantiateViewController(withIdentifier: "YourThirdPageViewController") as! YourThirdPageViewController

    pages.append(page1)
    pages.append(page2)
    pages.append(page3)

    pageControllerContainer = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
    pageControllerContainer.delegate = self
    pageControllerContainer.dataSource = self
    pageControllerContainer.setViewControllers([page1], direction: .forward, animated: true, completion: nil)

    view.addSubview(pageControllerContainer.view)
    view.bringSubview(toFront: pageControl)
    pageControl.numberOfPages = pages.count
    pageControl.currentPage = 0

now create following delegates method for pageviewcontroller:

     func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {

    let currentIndex = pages.index(of: viewController)

    if currentIndex == 0
    {
        return nil
    }
    let previousIndex = abs((currentIndex! - 1) % pages.count)
    return pages[previousIndex]
}

func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {


    let currentIndex = pages.index(of: viewController)

    if currentIndex == pages.count - 1
    {
        return nil
    }

    let nextIndex = abs((currentIndex! + 1 ) % pages.count)
    return pages[nextIndex]
}

after that create following datasource methods

    func pageViewController(_ pageViewController: UIPageViewController, willTransitionTo pendingViewControllers: [UIViewController]) {

    pendingIndex = pages.index(of: pendingViewControllers.first!)

}
func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating finished: Bool, previousViewControllers: [UIViewController], transitionCompleted completed: Bool) {

    if completed
    {

        currentIndex = pendingIndex
        if let index = currentIndex
        {
            pageControl.currentPage = index
        }
    }
     lastIndex = pages.count - 1
      print(lastIndex as Any)
      print(currentIndex as Any)

    if currentIndex == lastIndex
    {
        pageControl.isHidden = true
    }
    else
    {
        pageControl.isHidden = false
    }
}

this will allows to hide page controller when it comes to last index means last page

hope this will help :-) thank you ...