Detect that a PDFView did scroll

Question

Does PDFKit on iOS expose a PDFView's underlying UIScrollView or is there any other way to directly detect that the user has scrolled a PDFView?

My use case is to hide a nav bar when the document is scrolled so as a workaround I've added my own pan gesture recogniser to the PDFView's parent and I do the hiding in gestureRecognizerShouldBegin and always return false but I expect there's something more like UIScrollViewDelegate that I'm missing in the docs.

Answer 1

Try this,

NotificationCenter.default.addObserver(self, selector: #selector(handlePageChange(notification:)), name: Notification.Name.PDFViewPageChanged, object: nil)

@objc private func handlePageChange(notification: Notification)
{
    print("Page changed")
}