gistfile1.txt

///
func printItem(_ data: Data, withFilePath filePath: String){
        
        printController = UIPrintInteractionController.shared
        printController?.delegate = self
        let printInfo = UIPrintInfo.printInfo()
        printInfo.outputType = .general
        printInfo.jobName = "QR Code Image"
        printInfo.duplex = .longEdge
        printController?.printInfo = printInfo
        printController?.showsPageRange = true
        
        //If NSData contains data of image/PDF
        
        if (printController != nil) && UIPrintInteractionController.canPrint(data) {
            printController?.printingItem = data
        }
        else {
            let webView = UIWebView()
            printInfo.jobName = webView.request?.url?.absoluteString ?? ""
            webView.loadRequest(URLRequest(url: NSURL.fileURL(withPath: filePath)))
            printController?.printFormatter = webView.viewPrintFormatter()
        }
       
        let completionHandler: ((UIPrintInteractionController, Bool, Error) -> Void)? = { printController, completed, error in
            
            if !(completed && error as! Bool) {
                //NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, error.code);
                print("Printing could not complete because of error: \(error)")
            }
        }
        
        if UIDevice.current.userInterfaceIdiom == .pad {
            
            //printController?.present(from: view.frame, in: view, animated: true, completionHandler: completionHandler as! UIPrintInteractionCompletionHandler?)
        print(completionHandler as Any)
        printController?.present(from: self.view.frame, in: self.view, animated: true, completionHandler: nil)
            
        }
        else {
            printController?.present(from: self.view.frame, in: self.view, animated: true, completionHandler: nil)
        }
    }
    
    
    
   @IBAction func printQRCode(_ sender: Any) {
        // stringQRCode is url of image which shows on first screen above print button
        let myStringData = stringQRCode?.data(using: String.Encoding.utf8)
        print("URL NSDATA : \(myStringData)")
        print(stringQRCode!)
        printItem(myStringData!, withFilePath: stringQRCode!)
    }