Progress of UIPageViewController

Question

I would like to receive updates from the uipageviewcontroller during the page scrolling process. I want to know the transitionProgress in %. (This value should update when t

Answer 1

Based on Appgix solution, I'm adding this directly on my 'UIPageViewController' subclass. (Since I only need it on this one)

For Swift 3:

class MYPageViewControllerSubclass: UIPageViewController, UIScrollViewDelegate {

   override func viewDidLoad() {
          super.viewDidLoad()

          for subView in view.subviews {
             if subView is UIScrollView {
                (subView as! UIScrollView).delegate = self                
             }
          }
    }

    // MARK: - Scroll View Delegate

    public func scrollViewDidScroll(_ scrollView: UIScrollView) {
        let point = scrollView.contentOffset
        var percentComplete: CGFloat
        percentComplete = fabs(point.x - view.frame.size.width)/view.frame.size.width
        NSLog("percentComplete: %f", percentComplete)
    }

    // OTHER CODE GOES HERE...

}