Open PDF file using swift

Question

How can I add a PDF file for an app , where you click on a button to view the file & when you\'re done you get back to screen you were at?

Answer 1

You can also use Quick Look Framework from Apple.

It is very flexible.

You can show your PDF file with zoom feature.

Also you have support for all other types (like png, jpg, docx, txt, rtf, xlsx, zip, mov, etc) of files and it is very easy to use.

Please refer this answer if you want detail description of using QuickLook.framework

Answer 2

SWIFT 4+

If has to open file from local cache/Documentdiectory which has file path

Method 1: using UIDocumentInteractionController

class ViewController: UIViewController,UIDocumentInteractionControllerDelegate {
   //let path =  Bundle.main.path(forResource: "Guide", ofType: ".pdf")!
    let dc = UIDocumentInteractionController(url: URL(fileURLWithPath: path))
    dc.delegate = self
    dc.presentPreview(animated: true)
 }
   //MARK: UIDocumentInteractionController delegates
func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
     return self//or use return self.navigationController for fetching app navigation bar colour
 }

Method 2: using WebView

  let webview = WKWebView(frame: UIScreen.main.bounds)
  view.addSubview(webview)
  webview.navigationDelegate = self
  webview.load(URLRequest(url: URL(fileURLWithPath: path)))//URL(string: "http://") for web URL

Answer 3

A modernized version of Akila's answer, with the benefit that it is a drop in, ready to use UIViewController that you can integrate into your app.

import UIKit
import PDFKit

final class PDFViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        let pdfView = PDFView(frame: view.frame)
        
        title = "Your_title_here"
        
        if let url = Bundle.main.url(forResource: "document_name_here", withExtension: "pdf"),
            let pdfDocument = PDFDocument(url: url) {
            pdfView.displayMode = .singlePageContinuous
            pdfView.autoScales = true
            pdfView.displayDirection = .vertical
            pdfView.document = pdfDocument
            
            view.addSubview(pdfView)
        }
    }
}

• It creates the PDFView during viewDidLoad and sets it to use the view's frame
• The URL for the PDF file is safely unwrapped from the bundle and then a PDFDocument is created, if possible
• Some common settings are used. Adjust as needed
• Finally, it adds the PDFView as a subview of the controller's view

Answer 4

If you simply want to view a PDF file you can load it into a UIWebView.

let url : NSURL! = NSURL(string: "http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIWebView_Class/UIWebView_Class.pdf")
webView.loadRequest(NSURLRequest(URL: url))

Swift 4.1 :

let url: URL! = URL(string: "http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIWebView_Class/UIWebView_Class.pdf")
webView.loadRequest(URLRequest(url: url))

If you'd like to achieve more, a good framework is PSPDFKit.

Answer 5

Apple added PDFKit framework in iOS 11

Add a UIView to your view controller and make it's class to PDFView

import UIKit
import PDFKit

class ViewController: UIViewController {

    @IBOutlet var pdfView: PDFView!

    override func viewDidLoad() {
        super.viewDidLoad()

        if let path = Bundle.main.path(forResource: "sample", ofType: "pdf") {
            if let pdfDocument = PDFDocument(url: URL(fileURLWithPath: path)) {
                pdfView.displayMode = .singlePageContinuous
                pdfView.autoScales = true
                pdfView.displayDirection = .vertical
                pdfView.document = pdfDocument
            }
        }
    }
}

There are 4 display modes : singlePage, singlePageContinuous, twoUp, twoUpContinuous .