how to implement pdf editor

Question

I am working on an application and I am using pdfkit which I should have the ability to read pdf files and edit them. I found that iOS has an editor like the image

Answer 1

func createAndEditPDF() {

        let pdfURL = NSURL(fileURLWithPath: self.selectedFile.fileURL); // URL of the existing PDF 
        if let pdf:CGPDFDocument = CGPDFDocument(pdfURL as CFURL) { // Create a PDF Document
            let _newURL = "\(documentFolderPath)/\(self.selectedFile.name)"; // New URL to save editable PDF
            let _url = NSURL(fileURLWithPath: _newURL)
            var _mediaBox:CGRect = CGRect(x: 0, y: 0, width: pageWidth, height: pageHeight); // mediabox which will set the height and width of page
            let _writeContext = CGContext(_url, mediaBox: &_mediaBox, nil) // get the context

            //Run a loop to the number of pages you want
            for i in 0..