iPad ActionSheet Presentation - SourceView and SourceRect No Permitted Arrows

iPadActionSheetPresentationSourceViewAndSourceRectNoPermittedArrows.swift

if let popoverController = alertController.popoverPresentationController {
  popoverController.sourceView = self.view
  popoverController.sourceRect = CGRect(x: self.view.bounds.midX, y: self.view.bounds.midY, width: 0, height: 0)
  popoverController.permittedArrowDirections = []
}