how i can add a text on pdf? - ios

Question

I found some code to show PDF file and, the code has a pencil to draw on pdf but I want to change the pencil to text. When I click on button I can write a text and move the text anywhere on view
I want to add text and change the size and move it as I want.
//
// ViewController.swift
// PDFTest
//
// Created by Prashoor Chitnis on 22/11/17.
// Copyright © 2017 InfoBeans LLC. All rights reserved.
//
import UIKit
import PDFKit
struct PAIRAnn {
var drawing: PDFAnnotation;
var button: PDFAnnotation;
var currentPage: PDFPage;
}
class ViewController: UIViewController, PDFViewDelegate, DrawEventListener {
#IBOutlet weak var closeBtn: UIBarButtonItem!
#IBOutlet weak var saveBtn: UIBarButtonItem!
#IBOutlet weak var undoBtn: UIBarButtonItem!
#IBOutlet weak var pencil: UIBarButtonItem!
var selectedAnnotation = [PAIRAnn]()
var position: CGPoint?
var currentPage : PDFPage?
var pView: PDFView?
var pdfView : PDFView {
get {
if pView == nil {
pView = PDFView(frame: self.view.frame)
pView?.delegate = self
}
return pView!
}
}
var fadeView: UIView?
var messageView : UIView {
get {
if fadeView == nil {
fadeView = UIView(frame: CGRect(x: (self.view.frame.size.width - 300)/2, y: 30, width: 300, height: 55))
var frm = (fadeView?.bounds)!
frm.origin.y = 15
frm.size.height = 25
let text = UILabel(frame: frm)
text.textAlignment = .center
text.text = "Double-Click on any spot to begin"
text.font = UIFont.systemFont(ofSize: 16)
fadeView?.addSubview(text)
fadeView?.layer.cornerRadius = 27.5
fadeView?.layer.borderWidth = 1.5
fadeView?.backgroundColor = UIColor.white.withAlphaComponent(0.8)
}
return fadeView!
}
}
var drawVw: DrawScreen?
var drawView : DrawScreen {
get {
if drawVw == nil {
drawVw = DrawScreen(frame: self.view.frame)
drawVw?.listener = self
}
return drawVw!
}
}
private var gesture: UITapGestureRecognizer?
private var gestureRecognizer: UITapGestureRecognizer {
get {
if gesture == nil {
gesture = UITapGestureRecognizer.init(target: self, action: #selector(addDrawing(sender:)))
gesture?.numberOfTapsRequired = 2
}
return gesture!
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.closeBtn.isEnabled = false
self.saveBtn.isEnabled = false
self.undoBtn.isEnabled = false
self.pencil.isEnabled = true
self.view.insertSubview(self.pdfView, at: 0)
let url = Bundle.main.url(forResource: "EN8", withExtension: "pdf")
self.pdfView.document = PDFDocument.init(url: url!)
}
#IBAction func addPencil(_ sender: UIBarButtonItem) {
self.pencil.isEnabled = false
self.view.insertSubview(self.messageView, aboveSubview: self.pdfView)
self.pdfView.addGestureRecognizer(self.gestureRecognizer)
}
func removeMessage() {
if self.messageView.superview == nil {
return
}
UIView.animate(withDuration: 0.4, animations: {
self.messageView.transform = CGAffineTransform.init(translationX: 0, y: -70)
}) { (success) in
self.messageView.removeFromSuperview()
self.messageView.transform = CGAffineTransform.identity
}
}
#objc func addDrawing(sender: UITapGestureRecognizer) {
self.removeMessage()
self.position = sender.location(in: self.view)
self.view.insertSubview(self.drawView, at: 1)
currentPage = self.pdfView.currentPage
self.pdfView.go(to: currentPage!)
self.pencil.isEnabled = false
self.undoBtn.isEnabled = false
self.saveBtn.isEnabled = false
self.closeBtn.isEnabled = true
}
func pdfViewWillClick(onLink sender: PDFView, with url: URL) {
var checkVal = url.absoluteString
checkVal = checkVal.replacingOccurrences(of: "path://", with: "")
var draw: PDFAnnotation?
for ann in self.allLinks() {
let value = "\(ann.value(forAnnotationKey: PDFAnnotationKey(rawValue: "Link"))!)"
if checkVal == value {
draw = ann
break
}
}
var currpage: PDFPage? = nil
var button: PDFAnnotation?
for (btn, page) in self.allButtons() {
let value = "\(btn.value(forAnnotationKey: PDFAnnotationKey(rawValue: "_Path"))!)"
if checkVal == value {
currpage = page
button = btn
break
}
}
if draw != nil && button != nil && currpage != nil {
let color = draw?.value(forAnnotationKey: PDFAnnotationKey(rawValue: "_Color")) as! String
switch (color) {
case "red":
draw?.color = UIColor.red
break
default:
break
}
currpage?.removeAnnotation(button!)
self.editButtonItem.isEnabled = false
self.undoBtn.isEnabled = true
self.pencil.isEnabled = false
self.selectedAnnotation.append(PAIRAnn.init(drawing: draw!, button: button!, currentPage: currpage!))
}
}
#IBAction func undoAction(_ sender: Any) {
self.removeMessage()
if self.selectedAnnotation.count > 0 {
for pairs in self.selectedAnnotation {
pairs.drawing.color = UIColor.clear
pairs.currentPage.addAnnotation(pairs.button)
}
self.selectedAnnotation = []
self.closeBtn.isEnabled = false
self.saveBtn.isEnabled = false
self.undoBtn.isEnabled = false
self.pencil.isEnabled = true
}
else {
self.drawView.undo()
}
}
#IBAction func removeDrawing(sender: Any) {
self.removeMessage()
self.pdfView.removeGestureRecognizer(self.gestureRecognizer)
self.drawView.removeFromSuperview()
self.closeBtn.isEnabled = false
self.saveBtn.isEnabled = false
self.undoBtn.isEnabled = false
self.pencil.isEnabled = true
}
func drawDidBegin() {
self.undoBtn.isEnabled = true
self.saveBtn.isEnabled = true
}
func drawingGotEmpty() {
self.undoBtn.isEnabled = false
self.saveBtn.isEnabled = false
}
#IBAction func saveDrawing(_ sender: Any) {
self.pdfView.removeGestureRecognizer(self.gestureRecognizer)
self.currentPage = self.pdfView.page(for: self.drawView.touches[0].path.first!, nearest: true)
var arrayPath = [UIBezierPath]()
for touches in self.drawView.touches {
let bPth = UIBezierPath.init()
let point = self.pdfView.convert(touches.path.first!, to: self.currentPage!)
bPth.move(to: point)
if touches.path.count > 1 {
for i in 1...touches.path.count-1 {
let tch = self.pdfView.convert(touches.path[i], to: self.currentPage!)
bPth.addLine(to: tch)
}
}
arrayPath.append(bPth)
}
let ann = PDFAnnotation.init(bounds: (self.currentPage?.bounds(for: self.pdfView.displayBox))!, forType: PDFAnnotationSubtype.ink, withProperties: nil)
ann.shouldDisplay = false
for bPth in arrayPath {
ann.add(bPth)
}
ann.color = UIColor.clear
let stamp = "PAGE_\(Date.init().timeIntervalSince1970)"
ann.setValue(stamp, forAnnotationKey: PDFAnnotationKey.init(rawValue: "Link"))
ann.setValue("red", forAnnotationKey: PDFAnnotationKey.init(rawValue: "_Color"))
self.currentPage?.addAnnotation(ann)
let linkPoint = self.pdfView.convert(self.position!, to: self.currentPage!)
let linkAnn = PDFAnnotation.init(bounds: CGRect(x: linkPoint.x - 20, y: linkPoint.y - 12, width: 40, height: 24), forType: PDFAnnotationSubtype.widget, withProperties: nil)
linkAnn.widgetFieldType = .button
linkAnn.widgetDefaultStringValue = "Open"
linkAnn.widgetControlType = .pushButtonControl
linkAnn.action = PDFActionURL(url: URL(string: "path://\(stamp)")!)
linkAnn.setValue(stamp, forAnnotationKey: PDFAnnotationKey.init(rawValue: "_Path"))
linkAnn.backgroundColor = UIColor.yellow
self.currentPage?.addAnnotation(linkAnn)
self.drawView.removeFromSuperview()
self.closeBtn.isEnabled = false
self.saveBtn.isEnabled = false
self.undoBtn.isEnabled = false
self.pencil.isEnabled = true
}
func allButtons() -> [(PDFAnnotation,PDFPage)]{
var list = [(PDFAnnotation,PDFPage)]()
let checkType = PDFAnnotationSubtype.widget.rawValue.replacingOccurrences(of: "/", with: "");
for page in self.pdfView.visiblePages() {
for ann in page.annotations {
if ann.type! == checkType && ann.widgetFieldType == .button {
list.append((ann, page))
}
}
}
return list
}
func allLinks() -> [PDFAnnotation]{
var list = [PDFAnnotation]()
let checkType = PDFAnnotationSubtype.ink.rawValue.replacingOccurrences(of: "/", with: "");
for page in self.pdfView.visiblePages() {
for ann in page.annotations {
if ann.type! == checkType {
list.append(ann)
}
}
}
return list
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}