CODEWITHSUNDEEP
swiftpdf
user3140521
user3140521

Reputation: 151

PDFView does not display my PDF

I am having trouble getting my pdfView to display a PDF from a URL. I can get the file, and it definitely exists according to the console. Here's what I've done:

First, I declare a document picker: 

 @IBAction func addFromICloud(_ sender: UIBarButtonItem) {

    let documentPicker = UIDocumentPickerViewController(documentTypes: ["public.composite-content"], in: .import)
    documentPicker.delegate = self
    documentPicker.modalPresentationStyle = UIModalPresentationStyle.formSheet
    present(documentPicker, animated: true, completion: nil)

}

Second, I get a URL and the name of the document from DocumentPickerViewController:

func documentPicker(_ controller: UIDocumentPickerViewController,
                    didPickDocumentAt url: URL) {
    print ("Picker's url is \(url)")
    theName = String(describing:url.lastPathComponent)
    books.append(theName)
    tableView.reloadData()
}

Then, I append theName to the document directory path:

fileIsFromService = true
indexPoint = indexPath.row
let DocumentDirectory = try! FileManager.default.url(for:  .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
docURL = DocumentDirectory.appendingPathComponent(theName)

Then I make sure that the file exists, and it does:

let fileExists = FileManager().fileExists(atPath: (finalDocURL?.path)!)
print ("The value of fileExists is \(fileExists)")
addressArray.append(docURL!)
print ("The url to be passed should be \(docURL!)")
print ("addressArray is now \(addressArray)")
indexPoint = indexPath.row
viewController.load(books[indexPath.row])

Then, in viewController, I try to load the pdfView with docURL:

func load(_ name: String) {
    if fileIsFromService == true {
        guard let path = docURL else {return}

        if let document = PDFDocument(url: path){
            pdfView.document = document
        }

        pdfView.goToFirstPage(nil)

        if UIDevice.current.userInterfaceIdiom == .pad {
            title = name
        }
    }

I get no errors, just a blank pdfView. I know that the pdfView's subview has been added. No variables are nil. I suspect that I need to get the data out of docURL, but where would I write it?

Upvotes: 1

Views: 1977

Answers (1)

Leo Dabus
Leo Dabus

Reputation: 236360

The problem is that the pdf you are importing it is just a temporary file. You need to copy/move the temporary file url to your app documents folder.

UIDocumentPickerModeImport The URL refers to a copy of the selected document. This document is a temporary file. It remains available only until your application terminates. To keep a permanent copy, you must move this file to a permanent location inside your sandbox.

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {
    let documentDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    do {
        try FileManager.default.moveItem(at: url.standardizedFileURL, to: documentDirectory.appendingPathComponent(url.lastPathComponent))
        tableView.reloadData()
    } catch {
        print(error)
    }
}

Upvotes: 3

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