Wsrtjtyk

I have an app running in macOS Mojave and it works nicely. I can drag a pdf file onto a PDFView and can put a button to mark a watermark on the pdf file. I got the example code from apple WWDC written for iOS, and I translated it for macOS. My problem is how can I save this pdf including the watermark, to desktop for example?

My Code:

override func viewDidLoad() {

    super.viewDidLoad()

    pdfView?.acceptsDraggedFiles = true

}



func classForPage() -> AnyClass {

    return WatermarkPage.self

}



@IBAction func WaterMark(_ sender: NSButton) {

    if let document = PDFDocument(url:  (pdfView?.document?.documentURL)!){



    //Center document on gray background

    pdfView?.autoScales = true

    pdfView?.backgroundColor = NSColor.lightGray



    // 1. Set delegate

    document!.delegate = self   

    pdfView?.document = document



    let filename: String = "ExportPDF.pdf"

    let path =  NSSearchPathForDirectoriesInDomains(.documentDirectory,.userDomainMask,

                                                true)[0];

    let writePath = URL(fileURLWithPath: path).appendingPathComponent(filename).path

    //pdfView?.document?.write(toFile: writePath)

    document?.write(toFile: writePath)

    print("Pfad: (path)")

    }

}



class WatermarkPage: PDFPage {

    // 3. Override PDFPage custom draw

    /// - Tag: OverrideDraw

    override func draw(with box: PDFDisplayBox, to context: CGContext) {





        // Draw original content

        super.draw(with: box, to: context)



        // Draw rotated overlay string

        context.saveGState()



        let pageBounds = self.bounds(for: box)

        context.translateBy(x: 0.0, y: pageBounds.size.height)

        context.scaleBy(x: 1.0, y: -1.0)

        context.rotate(by: CGFloat.pi / 5.0)



        let string: NSString = "A P P R O V E D"



        let attributes = [NSAttributedString.Key.foregroundColor: NSColor(calibratedRed: 0.8, green: 0.5, blue: 0.5, alpha: 0.5),NSAttributedString.Key.font: NSFont.boldSystemFont(ofSize: 64.0)]

        string.draw(at: CGPoint(x: 300, y: 40), withAttributes: attributes)



        context.restoreGState()

        context.saveGState()



    }

}

Guys sorry that was a total misunderstanding of mine. Total error of reason. I can watermark the document then I can just save it or print it and the watermark will be present. I do not need a separate save function. Ou man I make my head so good sometimes you sit on the hose. Thank you very much for your great help.

If you want to save it to the Desktop.

You have to change the path, where the file is written

for example standard Desktop /Users/username/Desktop/

let fileManager = FileManager.default

let homeURL =  FileManager.default.urls(for: NSHomeDirectory, in: .userDomainMask).first! as NSURL

let writePath = homeURL.path + "Desktop" + <Filename>



document?.write(toFile: writePath)