Share pdf on web view to another devices using swift code - swift

Question

I have a WKWebView which displayed pdf. I want to share the file to another devices such as iPad, iPhone.... using the share button. I tried to display the pdf in preview so it will have the iOS share button the code below.
import UIKit
import WebKit
class ShowPDFView: UIViewController, UIDocumentInteractionControllerDelegate {
#IBAction func SharePDFFile(_ sender: Any) {
let fileName = "testPDF"
guard let urlPath = Bundle.main.url(forResource: fileName, withExtension: "pdf") else {return}
let controller = UIDocumentInteractionController(url: urlPath)
controller.delegate = self
controller.presentPreview(animated: true)
}
func documentInteractionControllerViewControllerForPreview(controller: UIDocumentInteractionController!) -> UIViewController! {
return self
}
func documentInteractionControllerViewForPreview(controller: UIDocumentInteractionController!) -> UIView! {
return self.view
}
func documentInteractionControllerRectForPreview(controller: UIDocumentInteractionController!) -> CGRect{
return self.view.frame
}
I got runtime error.
[MC] Reading from private effective user settings.
The preview does not loaded. Does anyone know why?

Answer 1

This function works for me. In Swift 4
#IBAction func SharePDFFile(_ sender: Any) {
let fm = FileManager.default
var pdfURL = (fm.urls(for: .documentDirectory, in: .userDomainMask)).last! as URL
pdfURL = pdfURL.appendingPathComponent("johnMilky.pdf") as URL
//Rename document name to "myFile.pdf"
let url = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("johnMilkyFile.pdf") as NSURL
do {
let data = try Data(contentsOf: pdfURL)
try data.write(to: url as URL)
let activitycontroller = UIActivityViewController(activityItems: [url], applicationActivities: nil)
if activitycontroller.responds(to: #selector(getter: activitycontroller.completionWithItemsHandler))
{
activitycontroller.completionWithItemsHandler = {(type, isCompleted, items, error) in
if isCompleted
{
print("completed")
}
}
}
//activitycontroller.excludedActivityTypes = [UIActivity.ActivityType.airDrop]
activitycontroller.popoverPresentationController?.sourceView = self.view
self.present(activitycontroller, animated: true, completion: nil)
}
catch {
print(error)
}
}