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

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