UIGraphicsBeginPDFContextToData does not show image after pdf creation - ios

Question

I am working on the HtmltoPDF creation. It is working fine when some image URL but not working with my server image URL.
Working URL downloaded from the google
Issue in the server image URL
I have put here my code for the pdf generation. Please find it
func exportHTMLContentToPDF(HTMLContent: String) -> String {
let printPageRenderer = IPPrintPageRenderer()
let printFormatter = UIMarkupTextPrintFormatter(markupText: HTMLContent)
printPageRenderer.addPrintFormatter(printFormatter, startingAtPageAt: 0)
let pdfData = drawPDFUsingPrintPageRenderer(printPageRenderer: printPageRenderer)
let str = "\(Global.kretriveUserData().firstName!.firstCharacter!)\(Global.kretriveUserData().Name!.firstCharacter!)".uppercased()
pdfFilename = "\(getDocDir())/\(str + invoiceNumber!).pdf"
pdfData?.write(toFile: pdfFilename, atomically: true)
print(pdfFilename)
return pdfFilename
}
func drawPDFUsingPrintPageRenderer(printPageRenderer: UIPrintPageRenderer) -> NSData! {
let data = NSMutableData()
UIGraphicsBeginPDFContextToData(data, CGRect.zero, nil)
for i in 0..<printPageRenderer.numberOfPages {
UIGraphicsBeginPDFPage()
printPageRenderer.drawPage(at: i, in: UIGraphicsGetPDFContextBounds())
}
UIGraphicsEndPDFContext()
return data
}
func getDocDir() -> String {
return NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
}
You can find a full demo here.
Thanks,

Answer 1

To generate a pdf from a webView you need to prepare your HTML code, create the WebView and inject the HTML code inside the webView and in webView didFinishLoading print the HTML content inside the pdf using the same width and height of the webView.
func webViewDidFinishLoad(_ webView: UIWebView) {
let render = UIPrintPageRenderer()
render.addPrintFormatter(webView.viewPrintFormatter(), startingAtPageAt: 0);
let page = CGRect(x: 0, y: 10, width: webView.frame.size.width, height: webView.frame.size.height) // take the size of the webView
let printable = page.insetBy(dx: 0, dy: 0)
render.setValue(NSValue(cgRect: page), forKey: "paperRect")
render.setValue(NSValue(cgRect: printable), forKey: "printableRect")
// 4. Create PDF context and draw
let pdfData = NSMutableData()
UIGraphicsBeginPDFContextToData(pdfData, CGRect.zero, nil)
for i in 1...render.numberOfPages {
UIGraphicsBeginPDFPage();
let bounds = UIGraphicsGetPDFContextBounds()
render.drawPage(at: i - 1, in: bounds)
}
UIGraphicsEndPDFContext();
let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
print(documentsPath)
pdfData.write(toFile: "\(documentsPath)/pdfName.pdf", atomically: true)
self.pdfPath = "\(documentsPath)/pdfName.pdf"
self.pdfTitle = "pdfName"
self.performSegue(withIdentifier: "showPDFSegue", sender: nil)
webView.removeFromSuperview()
self.loadingScreenViewController.view.removeFromSuperview()
}
Happy coding:)