How to use PDFPageOverlayViewProvider?

Question

Created Jun ’22

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I'm trying to use PDFPageOverlayViewProvider by copying the code provided in the "What's new in PDFKit" WWDC22 session here: https://developer.apple.com/videos/play/wwdc2022/10089/

I've copied the method implementations and set my pdfView's pageOverlayViewProvider property to the view where I implemented the protocol. However, when I try to run my app, the pdfView(_ view: PDFView, overlayViewFor page: PDFPage) method is never getting called.

Has anyone been able to get this working successfully?

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Answer 1

Nuix OP

Aug ’22

It seems that PDFPageOverlayViewProvider is set in the UIViewRepresentable of PDFView derived from class Coordiantor: NSObject. I wander why Apple doesn’t provide the demo App presented in the video. Maybe, the protocol is not working yet in the beta version.

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Answer 2

omar_a OP

Nov ’22

There's a recent question (asked Nov 1) posted on Stack Overflow, sharing the same problem: How to set PDFPageOverlayViewProvider for PDFView?

I'm also having difficulty getting pageOverlayViewProvider to work properly, albeit with NSViewRepresentable.

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Answer 3

Carl_H_L OP

Dec ’22

With omar_a's suggestion, I succeed in presenting overlay views for a PDF file. But the issue is I can not draw anything on canvas as WWDC's demo video. In the video, the presenter overlaid a canvas view and draw with his pencil. But I can't make the same. Should I make some custom gesture handlers PDF view to activate pencil input?

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Answer 4

jtaby OP

Apr ’23

You need to also set isInMarkupMode on the PDFView instance to true, so it changes how hit testing works.

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Answer 5

Aflaf OP

Jul ’23

Hi ! I just figured out that setting the PDFDocument to nil in the editing PDFView Briggs the PDFPageOverlayViewProvider willEndDisplayingOverlayView(for:) delegate ! Then all custom pages get their edited content and my custom UIDocument's contents(forType:) can now grab my custom PDFPage content to burn into the .pdf file !

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