Swift iOS PDF

add_footer.swift

    func addFooter(pdfImage: UIImage, pageIndex:Int, maxPage:Int) -> UIImage{
        
        UIGraphicsBeginImageContextWithOptions((pdfImage.size), false, 0.0)
        //first, draw the pdf image
        pdfImage.draw(in: CGRect(x: 0, y: 0, width: (pdfImage.size.width) , height: (pdfImage.size.height)))
        
        let footerHeight:CGFloat = 100
        let rect3: CGRect = CGRect(x: 0, y: pdfImage.size.height - 50 , width: (pdfImage.size.width)  , height: 100 )
        //                QR_image.draw(in: rect3)
        let renderer = UIGraphicsImageRenderer(size: CGSize(width:  (pdfImage.size.width), height: 100))
        let img = renderer.image { ctx in
            // 2
            let footerAddress = "Quotation No:"
//            let footerPage = "Page \(pageIndex) of \(maxPage)"
            let footerPage = "Page \(pageIndex) of \(maxPage)"
            let paragraphStyle = NSMutableParagraphStyle()
            paragraphStyle.alignment = .left
            
            let paragraphStylePage = NSMutableParagraphStyle()
            paragraphStylePage.alignment = .right
            let font = UIFont.systemFont(ofSize: 8)
            let textSize = getTextSize(text: footerAddress as String, font: font)
            
            // 3
            let attrs = [NSAttributedStringKey.font: font, NSAttributedStringKey.paragraphStyle: paragraphStyle,NSAttributedStringKey.foregroundColor: UIColor(red: 0/255.0, green: 0/255.0, blue: 0/255, alpha: 1.0)]
            
            
            4
            footerAddress.draw(with: CGRect(x: 40, y: 0, width: 448, height: 60), options: .usesLineFragmentOrigin, attributes: attrs, context: nil)
            footerPage.draw(with: CGRect(x: pdfImage.size.width - 100, y: 0, width: 100, height: 60), options: .usesLineFragmentOrigin, attributes: attrs, context: nil)

        }
        img.draw(in: rect3)
        
        // now we get the resulting image which are signature on top of the pdf
        let newImage = UIGraphicsGetImageFromCurrentImageContext()!
        
        // End the context now that we have the image we need
        UIGraphicsEndImageContext()
        return newImage
    }
    
    

getTextsize.swift

    func getTextSize(text: String, font: UIFont!, textAttributes: [NSAttributedStringKey: Any]! = nil) -> CGSize {
        
        let pageFrame = CGRect(x: 0.0, y: 0.0, width: 595.2, height: 841.8)
        let testLabel = UILabel(frame: CGRect(x: 0.0, y: 0.0, width: pageFrame.size.width, height: 100))
        if let attributes = textAttributes {
            testLabel.attributedText = NSAttributedString(string: text, attributes: attributes)
        }
        else {
            testLabel.text = text
            testLabel.font = font!
        }
        
        testLabel.sizeToFit()
        
        return testLabel.frame.size
    }