Xcode 7.1, Swift 2 UIWebView Load Error - swift

Question

I have a project that has a ViewController that loads a saved NSURL from memory. This NSURL is saved using NSCoding. When I run my app initially, my print log says:
Saved URL File:
file:///private/var/mobile/Containers/Data/Application/7939335F-C909-479E-A309-5AC833069A7B/Documents/Inbox/Pizza-2.pdf
Webview started Loading
Webview did finish load
It displays the PDF file just fine. When I run my app again a few minutes later, it won't display the PDF and it says:
Saved URL File:
file:///private/var/mobile/Containers/Data/Application/7939335F-C909-479E-A309-5AC833069A7B/Documents/Inbox/Pizza-2.pdf
Webview started Loading Webview fail with error Optional(Error
Domain=NSURLErrorDomain Code=-1100 "The requested URL was not found on
this server." UserInfo={NSUnderlyingError=0x14883f210 {Error
Domain=kCFErrorDomainCFNetwork Code=-1100 "The requested URL was not
found on this server."
UserInfo={NSErrorFailingURLStringKey=file:///private/var/mobile/Containers/Data/Application/7939335F-C909-479E-A309-5AC833069A7B/Documents/Inbox/Pizza-2.pdf,
NSLocalizedDescription=The requested URL was not found on this
server.,
NSErrorFailingURLKey=file:///private/var/mobile/Containers/Data/Application/7939335F-C909-479E-A309-5AC833069A7B/Documents/Inbox/Pizza-2.pdf}},
NSErrorFailingURLStringKey=file:///private/var/mobile/Containers/Data/Application/7939335F-C909-479E-A309-5AC833069A7B/Documents/Inbox/Pizza-2.pdf,
NSErrorFailingURLKey=file:///private/var/mobile/Containers/Data/Application/7939335F-C909-479E-A309-5AC833069A7B/Documents/Inbox/Pizza-2.pdf,
NSLocalizedDescription=The requested URL was not found on this
server.})
My code for the ViewController is:
class PDFItemViewController: UIViewController, UIWebViewDelegate {
// MARK: Properties
var file: PDFFile?
var incomingURL: NSURL!
#IBOutlet weak var background: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//Set theme pic to back always
view.sendSubviewToBack(background)
let myWebView:UIWebView = UIWebView(frame: CGRectMake(0, 44, UIScreen.mainScreen().bounds.width, UIScreen.mainScreen().bounds.height))
self.view.addSubview(myWebView)
myWebView.delegate = self
if let file = file {
incomingURL = file.url
print("Saved URL File: \(incomingURL)")
let request = NSURLRequest(URL: incomingURL!)
myWebView.loadRequest(request)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: UIWebView Delegate
func webView(webView: UIWebView, didFailLoadWithError error: NSError?) {
print("Webview fail with error \(error)");
}
func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
return true
}
func webViewDidStartLoad(webView: UIWebView) {
print("Webview started Loading")
}
func webViewDidFinishLoad(webView: UIWebView) {
print("Webview did finish load")
}
}
'PDFFile' is an array of PDF Files. The NSURL is saved from an incoming PDF file the user can view from mail. It looks like it might not be saving? But why is it showing the file name if it's not saving? Thank you.
Update:
In my AppDelegate I have this code:
func application(app: UIApplication, openURL url: NSURL, options: [String : AnyObject]) -> Bool {
// Transfer incoming file to global variable to be read
if url != "" {
// Load from Mail App
incomingFileTransfer = url
incomingStatus = "Incoming"
}
return true
}
I've created a class called PDFFile.swift:
// Class for the saved PDF File, in this case a NSURL
class PDFFile: NSObject, NSCoding {
// MARK: Properties
var name: String
var url: NSURL
// MARK: Archiving Path
static let DocumentsDirectory = NSFileManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first!
static let ArchiveURL = DocumentsDirectory.URLByAppendingPathComponent("files")
// MARK: Types
struct PropertyKey {
static let nameKey = "name"
static let urlKey = "url"
}
// MARK: Initialization
init?(name: String, url: NSURL) {
self.name = name
self.url = url
super.init()
if name.isEmpty {
return nil
}
}
// MARK: NSCoding
func encodeWithCoder(aCoder: NSCoder) {
aCoder.encodeObject(name, forKey: PropertyKey.nameKey)
aCoder.encodeObject(url, forKey: PropertyKey.urlKey)
}
required convenience init?(coder aDecoder: NSCoder) {
let name = aDecoder.decodeObjectForKey(PropertyKey.nameKey) as! String
let url = aDecoder.decodeObjectForKey(PropertyKey.urlKey) as! NSURL
self.init(name: name, url: url)
}
}
When I view the incoming PDF file from mail, it loads in a separate UIWebView as such:
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
// Incoming Emailed PDF from the 'Open-in' feature
if incomingFileTransfer != nil {
// Show incoming file
let request = NSURLRequest(URL: incomingFileTransfer!)
incomingView.loadRequest(request)
}
}
My save button points to an unwind on another View Controller as:
#IBAction func unwindToMainMenu(sender: UIStoryboardSegue) {
if let sourceViewController = sender.sourceViewController as? IncomingFileViewController, file = sourceViewController.file {
if let selectedIndexPath = fileTableNotVisible.indexPathForSelectedRow {
// Update an existing recipe.
pdfFiles[selectedIndexPath.row] = file
fileTableNotVisible.reloadRowsAtIndexPaths([selectedIndexPath], withRowAnimation: .None)
}
else {
// Add a new file
let newIndexPath = NSIndexPath(forRow: pdfFiles.count, inSection: 0)
// Add to pdf file array
pdfFiles.append(file)
// Adds new file to bottom of table
fileTableNotVisible.insertRowsAtIndexPaths([newIndexPath], withRowAnimation: .Bottom)
}
saveFiles()
}
}
// MARK: NSCoding
func saveFiles() {
let isSuccessfulSave = NSKeyedArchiver.archiveRootObject(pdfFiles, toFile: PDFFile.ArchiveURL.path!)
if !isSuccessfulSave {
print("Failed to save PDF file")
}
}