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Creating PDF from UIView in Swift

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I have been stuck/ researching this problem for days, the method below successfully creates the pdf from a regular size UIView. However, I need the contents of my containerView that is located inside a UIScrollview. The height of my containerView is 5000. Can someone help me to render the containerView into multiple PDF pages or direct me to a better way of doing this.

func exportAsPdfFromView() -> String {

        let pdfPageFrame = self.bounds
        let pdfData = NSMutableData()
        UIGraphicsBeginPDFContextToData(pdfData, pdfPageFrame, nil)
        UIGraphicsBeginPDFPageWithInfo(pdfPageFrame, nil)
        guard let pdfContext = UIGraphicsGetCurrentContext() else { return "" }
        self.layer.render(in: pdfContext)
        UIGraphicsEndPDFContext()
        return self.saveViewPdf(data: pdfData)

    }

   

Can you explain what you're trying to accomplish in more details? My understanding is you have a view placed inside a UIScrollView, as it likely higher than the display size so you need to scroll to see all the content, and you want to make a PDF of the scrollview. What is self in this example? If it is the UIScrollView, you shouldn't use the bounds, contentSize is what you're interested in.

   

I am actually attempting to render the pdf from a UISrollview, I am still having a big fight trying to make it work and I don't know where else to research. The documentation is limited.

1      

I am new to SwiftUI. I am converting a scrollable SwiftUI view to pdf but unable to do that. The output will be empty.

Here is my code

This is the view that I want to convert into pdf

GeometryReader{geo in
                                        FirstView(getResumeId: self.getResumeId).onAppear{
                                            self.exportToPDF(widht:geo.size.width,height:geo.size.height)
                               }
                          }

This is my function that generates the pdf from view

func exportToPDF(width:CGFloat, height:CGFloat) {
        let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
        let outputFileURL = documentDirectory.appendingPathComponent("\(self.getResumeId).pdf")
        //Normal with
        let width: CGFloat = width
        //Estimate the height of your view
        let height: CGFloat = height
        let charts = FirstView(getResumeId: self.getResumeId)
        let pdfVC = UIHostingController(rootView: charts)
        pdfVC.view.frame = CGRect(x: 0, y: 0, width: width, height: height)
        //Render the view behind all other views
        let rootVC = UIApplication.shared.windows.first?.rootViewController
        rootVC?.addChild(pdfVC)
        rootVC?.view.insertSubview(pdfVC.view, at: 0)
        //Render the PDF

        let pdfRenderer = UIGraphicsPDFRenderer(bounds: CGRect(x: 0, y: 0, width: width, height: height))
        DispatchQueue.main.async {
            do {
                try pdfRenderer.writePDF(to: outputFileURL, withActions: { (context) in
                    context.beginPage()
                    rootVC?.view.layer.render(in: context.cgContext)
                })
                UserDefaults.standard.set(outputFileURL, forKey: "pdf")
                UserDefaults.standard.synchronize()
                print("wrote file to: \(outputFileURL.path)")
            } catch {
                print("Could not create PDF file: \(error.localizedDescription)")
            }

        pdfVC.removeFromParent()
        pdfVC.view.removeFromSuperview()
    }
}

The empty pdf generate or sometimes pdf did not open. I searched alot but unable to do that. If anyone help me I am verythankful to him.

   

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