"onDismissal" closure doesn't execute when vc is dismissed with swipe

[lukemmtt]

In my parent view controller, I've defined the following:

whatsNew.onDismissal = didDismissWhatsNew

But the closure only executes when the user clicks on the "continue" button at the bottom of the WhatsNew vc. It does not execute when the user dismisses the page sheet by swiping downward.

I'm no professional, but until someone figures out a generalized solution, I figured I'd share what I did to get around this.

Manual workaround:

First I modify my parent view controller to adhere to the UIAdaptivePresentationControllerDelegate protocol:

class PlannerViewController: UIViewController, UIAdaptivePresentationControllerDelegate {

Then in the parent vc's function where I initialize the WhatsNew vc, prior to calling whatsNew.presentIfNeeded(on: self), I set "self" as the presentationController delegate:

whatsNew.presentationController?.delegate = self

Lastly, in the parent VC, I implement the presentationControllerDidDismiss(_:) method and call the same dismissal action that I defined for whatsNew.onDismissal:

  func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
    didDismissWhatsNew()
  }

[arunas111]

I just used whatsNew.isModalInPresentation = true so users can't dismiss by swiping.