draw(_:)
Draw and render a visible page.
Declaration
func draw(_ page: PDFPage)Discussion
Do not invoke this method, except by invoking it on super from a subclass.
The PDFView class calls draw(_:) as necessary for each visible page that requires rendering. In the PDFView class, this method erases page to white, calls [page drawInRect: pageRect withBox: [self displayBox]] , and then draws the selection, if any.
You can override this method to draw on top of a PDF page or to control how pages are drawn. In these cases, invoke this method on super and then perform custom drawing on top of the PDF page.