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[UPDATED] I'm trying to set a pageOverlayViewProvider for a PDFView and it does not work as expected. PDFPageOverlayViewProvider methods are not being called, PDFViewDelegate methods are working fine.

struct ReaderView: UIViewRepresentable {
    
    public typealias UIViewType = PDFView
    
    let url: URL
    let document: PDFDocument
    
    init(_ url: URL) {
        self.url = url
        self.document = PDFDocument(url: self.url)!
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator()
    }
    
    func makeUIView(context: Context) -> PDFView {
        let pdfView = PDFView()
        
        pdfView.document = document
        pdfView.displayMode = .singlePageContinuous
        pdfView.displayDirection = .vertical
        pdfView.autoScales = true
        pdfView.delegate = context.coordinator
        pdfView.pageOverlayViewProvider = context.coordinator
        pdfView.usePageViewController(true)
        pdfView.backgroundColor = .clear
        
        document.delegate = context.coordinator

        return pdfView
    }
    
    func updateUIView(_ uiView: PDFView, context: Context) {

    }
}

extension ReaderView {
    
    class Coordinator: NSObject, PDFPageOverlayViewProvider, PDFViewDelegate, PDFDocumentDelegate {
        
        func pdfView(_ view: PDFView, overlayViewFor page: PDFPage) -> UIView? {
            return UIView(frame: .zero)
        }
        
        func pdfView(_ pdfView: PDFView, willDisplayOverlayView overlayView: UIView, for page: PDFPage) { 
        }
        
        func pdfView(_ pdfView: PDFView, willEndDisplayingOverlayView overlayView: UIView, for page: PDFPage) { 
        }
        
        func pdfViewWillClick(onLink sender: PDFView, with url: URL) {
        }
        
        func didMatchString(_ instance: PDFSelection) {
        }

}
Pavlo
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  • 3
  • That isn't how you create a Coordinator in a `UIViewRepresentable` -- look into the `makeCoordinator` function – jnpdx Nov 01 '22 at 23:35
  • @jnpdx thanks! I fixed my question. Still can't make it work. Is setting pageOverlayViewProvider to PDFView working for you? – Pavlo Nov 02 '22 at 08:48
  • I’m having exactly the same problem in trying to use PDFPageOverlayViewProvider with NSViewRepresentable. – Omar Nov 07 '22 at 19:10

1 Answers1

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To get pageOverlayViewProvider to work with PDFView, it seems that setting this instance property must be done before associating a PDF document with PDFView.

In using UIViewRepresentable, the following ought to work when making the PDFView with the makeUIView function:

func makeUIView(context: Context) -> PDFView {
    let pdfView = PDFView()
    
    pdfView.displayMode = .singlePageContinuous
    pdfView.displayDirection = .vertical
    pdfView.autoScales = true
    pdfView.delegate = context.coordinator
    pdfView.pageOverlayViewProvider = context.coordinator
    pdfView.usePageViewController(true)
    pdfView.backgroundColor = .clear
    
    pdfView.document = document
    document.delegate = context.coordinator

    return pdfView
}
Omar
  • 126
  • 3