Swift3 file preview not working - swift

Question

I think something changed within Swift that disabled me from previewing my files. It worked fine previously. If I click on say a PDF file in my app, I see the title of the PDF, but the content of PDF (preview) area does not show.
Below is my code & logs & also the screenshot. If anyone has an idea of where I can fix the issue, any help would be greatly appreciated.
// When file is clicked this method is called
#objc private func handleTapped() {
guard let url = self.file.fileUrl else { return }
if self.file.isDownloaded {
self.showDocumentController(url: self.file.urlInDocumentsDirectory! as NSURL)
return
}
SVProgressHUD.showProgress(0)
let destination: DownloadRequest.DownloadFileDestination = { _, _ in
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
let fileURL = documentsURL.appendingPathComponent("pig.png")
return (documentsURL, [.removePreviousFile, .createIntermediateDirectories])
}
Alamofire.download(url, to: destination)
.downloadProgress { (download) in
DispatchQueue.main.async() {
SVProgressHUD.showProgress(Float(download.fractionCompleted))
}
}.validate(statusCode: 200..<300)
.response { (response) in
SVProgressHUD.dismiss()
guard response.response?.statusCode == 200 else { return }
let directoryURL = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
let pathURL = URL(fileURLWithPath: directoryURL, isDirectory: true)
//pathURL: file:///var/mobile/Containers/Data/Application/6DDCCC30-107C-4613-B63D-18962C3D06D3/Documents/
guard let fileName = response.response?.suggestedFilename else { return }
//fileName: 05_기조강연_RobertMankin_BETTER+OFFICES+GREATER+INNOVATION.pdf
let fileURL = pathURL.appendingPathComponent(fileName)
//fileURL: file:///var/mobile/Containers/Data/Application/6DDCCC30-107C-4613-B63D-18962C3D06D3/Documents/05_%E1%84%80%E1%85%B5%E1%84%8C%E1%85%A9%E1%84%80%E1%85%A1%E1%86%BC%E1%84%8B%E1%85%A7%E1%86%AB_RobertMankin_BETTER+OFFICES+GREATER+INNOVATION.pdf
self.saveFileURL(url: fileURL as NSURL)
self.showDocumentController(url: fileURL as NSURL)
}
}
private func saveFileURL(url: NSURL) {
self.file.urlInDocumentsDirectory = url as URL
let realm = RealmService.defaultRealm
try! realm?.write {
realm?.add(self.file, update: true)
}
self.file = self.file.copyFromRealm()
}
private func showDocumentController(url: NSURL) {
let docController = UIDocumentInteractionController(url: url as URL)
docController.delegate = self
docController.presentPreview(animated: true)
}
// MARK: UIDocumentInteractionControllerDelegate methods
func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
if let controller = UIApplication.shared.keyWindow?.topMostViewController() {
return controller
}
return UIViewController()
}
this is how the preview shows

Answer 1

Here Is The Code
import UIKit
import Alamofire
class ViewController: UIViewController, UIWebViewDelegate
{
#IBOutlet weak var WebView: UIWebView!
var NewsURL: String = ""
override func viewDidLoad()
{
super.viewDidLoad()
Self.LoadPdf()
}
func LoadPdf()
{
let url = NSURL (string: "\(http://)") //Your Pdf URL Here
let requestObj = NSURLRequest(URL: url!);
WebView.loadRequest(requestObj)
}
}