Print the Screen through Printer in ios Swift 3.0

let btn = UIButton()

            btn.frame = CGRect(x: 15, y: 15, width: 120, height: 30)

            btn.setTitle("print", for: .normal)

            btn.addTarget(self, action: #selector(self.printData), for: .touchUpInside)

            view.addSubview(btn)

            btn.backgroundColor = UIColor.orange

func printData(){

        let printInfo = UIPrintInfo(dictionary:nil)

        printInfo.outputType = UIPrintInfoOutputType.general

        printInfo.jobName = "My Print Job"

        

        // Set up print controller

        let printController = UIPrintInteractionController.shared

        printController.printInfo = printInfo

        

        // Assign a UIImage version of my UIView as a printing iten

        printController.printingItem = self.view.toImage()

        

        // Do it

        printController.present(from: self.view.frame, in: self.view, animated: true, completionHandler: nil)

    

    }

extension UIView {

    func toImage() -> UIImage {

        UIGraphicsBeginImageContextWithOptions(bounds.size, false, UIScreen.main.scale)

        

        drawHierarchy(in: self.bounds, afterScreenUpdates: true)

        

        let image = UIGraphicsGetImageFromCurrentImageContext()

        UIGraphicsEndImageContext()

        return image!

    }

}