Create a PDF file from a UIScrollView in Swift

问题

I want to create a PDF file from the contents of a UIScrollView.

func createPdfFromView(aView: UIView, saveToDocumentsWithFileName fileName: String) {
    let pdfData = NSMutableData()
    let height = 1754.0
    let width = 1240.0
    UIGraphicsBeginPDFContextToData(pdfData, CGRect(x:-30, y:15,width:width,height:height) , nil)
    UIGraphicsBeginPDFPage()
    guard let pdfContext = UIGraphicsGetCurrentContext() else { return }

    aView.layer.render(in: pdfContext)
    UIGraphicsEndPDFContext()

    if let documentDirectories = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first {
        let documentsFileName = documentDirectories + "/" + fileName
        debugPrint(documentsFileName)
        pdfData.write(toFile: documentsFileName, atomically: true)
    }
}

I would expect that the code generates a PDF oriented on the size of the content in the scrollview.

The code currently only generates a static PDF. If the content in the scrollview is bigger than the PDF page, the content is cut off.

回答1:

func createPdfFromView()
{
    // Set frame as per content of view

    self.spreadsheetView.frame = CGRect(x: 0, y: 0, width: self.spreadsheetView.contentSize.width, height: self.spreadsheetView.contentSize.height)
    let pdfPageBounds: CGRect = self.spreadsheetView.frame
    let pdfData: NSMutableData = NSMutableData()

    // Rendering spreadsheetView
    UIGraphicsBeginPDFContextToData(pdfData, pdfPageBounds, nil)
    UIGraphicsBeginPDFPageWithInfo(pdfPageBounds, nil)
    self.spreadsheetView.layer.render(in: UIGraphicsGetCurrentContext()!)
    UIGraphicsEndPDFContext()
    let documentDirectories = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first
    let documentsFileName = documentDirectories! + "/" + "pdfName.pdf"
    pdfData.write(toFile: documentsFileName, atomically: true)
    print(documentsFileName)

    // Reset spreadsheetView
    self.spreadsheetView.frame = CGRect(x: 0, y: 64, width: self.view.frame.width, height: self.view.frame.height)
    self.spreadsheetView.layoutSubviews()
    self.spreadsheetView.layoutIfNeeded()
    self.spreadsheetView.reloadData()}

Hope it will help you to create PDF from the spreadsheet.

Ref. Github code Link: SpreadsheetView

来源：https://stackoverflow.com/questions/47605767/create-a-pdf-file-from-a-uiscrollview-in-swift