How to Give PDF Data a Filename for User to Save in Swift

Saving PDF Files with Swift in iOS and display them

Since several people requested this, here is the equivalent to the first answer in Swift:

//The URL to Save
let yourURL = NSURL(string: "http://somewebsite.com/somefile.pdf")
//Create a URL request
let urlRequest = NSURLRequest(URL: yourURL!)
//get the data
let theData = NSURLConnection.sendSynchronousRequest(urlRequest, returningResponse: nil, error: nil)

//Get the local docs directory and append your local filename.
var docURL = (NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)).last as? NSURL

docURL = docURL?.URLByAppendingPathComponent( "myFileName.pdf")

//Lastly, write your file to the disk.
theData?.writeToURL(docURL!, atomically: true)

Also, since this code uses a synchronous network request, I highly recommend dispatching it to a background queue:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), { () -> Void in
    //The URL to Save
    let yourURL = NSURL(string: "http://somewebsite.com/somefile.pdf")
    //Create a URL request
    let urlRequest = NSURLRequest(URL: yourURL!)
    //get the data
    let theData = NSURLConnection.sendSynchronousRequest(urlRequest, returningResponse: nil, error: nil)

    //Get the local docs directory and append your local filename.
    var docURL = (NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)).last as? NSURL

    docURL = docURL?.URLByAppendingPathComponent( "myFileName.pdf")

    //Lastly, write your file to the disk.
    theData?.writeToURL(docURL!, atomically: true)
})

And the answer to second question in Swift:

//Getting a list of the docs directory
let docURL = (NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).last) as? NSURL

//put the contents in an array.
var contents = (NSFileManager.defaultManager().contentsOfDirectoryAtURL(docURL!, includingPropertiesForKeys: nil, options: NSDirectoryEnumerationOptions.SkipsHiddenFiles, error: nil))
//print the file listing to the console
println(contents)

_x0013_

Rename the download pdf file using swift iOS

try this:

pdfDocument.documentAttributes?["Title"] = "my title attribute"

or

pdfDocument.documentAttributes?[PDFDocumentAttribute.titleAttribute] = "my title attribute"

Similarly for PDFDocumentAttribute.subjectAttribute.

The above will set the Title of your document, and when you save it, the file name will be whatever file name you give it.

EDIT-1: saving the pdfDocument to a file with a chosen file name.

       DispatchQueue.main.async {
            guard let unwrappedData = data, error == nil else {
                completion(.failure(error ?? Constants.dummyError))
                return
            }
            guard let pdfDocument = PDFDocument(data: unwrappedData) else {
                completion(.failure(error ?? Constants.dummyError))
                return
            }
            
            // set the Title
            pdfDocument.documentAttributes?[PDFDocumentAttribute.titleAttribute] = "my title attribute"
            
            do {
                // save the document to the given file name ("mydoc.pdf")
                let docURL = try FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false).appendingPathComponent("mydoc.pdf")  // <-- here file name
                pdfDocument.write(to: docURL)
                print("\n docUrl: \(docURL.absoluteString)\n")
            }
            catch {
                print("Error \(error)")
            }
            completion(.success(pdfDocument))
        }

Swift - Automatically save pdf file to Files app On My iPhone

Example of download any pdf file and automatically save inside files folder of iPhone.

    let urlString = "https://www.tutorialspoint.com/swift/swift_tutorial.pdf"
    let url = URL(string: urlString)
    let fileName = String((url!.lastPathComponent)) as NSString
    //Mark:  Create destination URL
    let documentsUrl:URL =  (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first as URL?)!
    let destinationFileUrl = documentsUrl.appendingPathComponent("\(fileName)")
    //Mark: Create URL to the source file you want to download
    let fileURL = URL(string: urlString)
    let sessionConfig = URLSessionConfiguration.default
    let session = URLSession(configuration: sessionConfig)
    let request = URLRequest(url:fileURL!)
    let task = session.downloadTask(with: request) { (tempLocalUrl, response, error) in
        if let tempLocalUrl = tempLocalUrl, error == nil {
            //Mark: Success
            if let statusCode = (response as? HTTPURLResponse)?.statusCode {
                print("Successfully downloaded. Status code: \(statusCode)")
            }
            do {
                try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl)
                do {
                    //Mark: Show UIActivityViewController to save the downloaded file
                    let contents  = try FileManager.default.contentsOfDirectory(at: documentsUrl, includingPropertiesForKeys: nil, options: .skipsHiddenFiles)
                    for indexx in 0..<contents.count {
                        if contents[indexx].lastPathComponent == destinationFileUrl.lastPathComponent {
                            let activityViewController = UIActivityViewController(activityItems: [contents[indexx]], applicationActivities: nil)
                            self.present(activityViewController, animated: true, completion: nil)
                        }
                    }
                }
                catch (let err) {
                    print("error: \(err)")
                }
            } catch (let writeError) {
                print("Error creating a file \(destinationFileUrl) : \(writeError)")
            }
        } else {
            print("Error took place while downloading a file. Error description: \(error?.localizedDescription ?? "")")
        }
    }
    task.resume()
    
    

How to download a Pdf file in swift and find in file manager

Configure your app so that its files appear in the Files app by adding below lines to your Info.plist file.

<key>UIFileSharingEnabled</key>
<true/>
<key>LSSupportsOpeningDocumentsInPlace</key>
<true/>

OR

Just like below using Xcode

Note: Remember that you must be running iOS 11 or above.

Change name of pdf file programmatically after user selects it from Document Picker

You can do it while you are moving/copying the file to your app's local storage.

Code

/// When you finish picking up a file, you get it's current location in the delegate callback like this.
func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
    
    /// Assumption is that you are picking only one file at a time.
    guard let url = urls.first else { return }
    
    do {
        /// You can copy this move this file to your Documents directory
        let documentsDirectory = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
        let newFileName = "custom_name.pdf"
        let newFilePath = "\(documentsDirectory)/\(newFileName)"
        try FileManager.default.moveItem(at: url, to: URL(fileURLWithPath: newFilePath))
    } catch {
        /// Handle error
    }
}

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