Xcode6 - Swift（PDF查看器和ENSideMenu）

Question

我正在构建一个具有PDF本地的应用程序，可以脱机使用。我使用ENSideMenu和表视图动态指向并在UIWebView中显示PDF。以下是PDF视图的代码：

var pdfLoc = NSURL(fileURLWithPath:NSBundle.mainBundle().pathForResource("PDF_file", ofType:"pdf")!) //replace PDF_file with your pdf die name
 var request = NSURLRequest(URL: pdfLoc);
 self.pdfWebView.loadRequest(request);

这是我的导航控制器：

import UIKit

class MyNavigationController: ENSideMenuNavigationController, ENSideMenuDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        sideMenu = ENSideMenu(sourceView: self.view, menuTableViewController: MyMenuTableViewController(), menuPosition:.Left)
        sideMenu?.delegate = self //optional
        sideMenu?.menuWidth = 180.0 // optional, default is 160
        //sideMenu?.bouncingEnabled = false

        // make navigation bar showing over side menu
        view.bringSubviewToFront(navigationBar)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // MARK: - ENSideMenu Delegate
    func sideMenuWillOpen() {
        println("sideMenuWillOpen")
    }

    func sideMenuWillClose() {
        println("sideMenuWillClose")
    }

这是我的表视图控制器：

import UIKit
import QuickLook


class FirstStepsTableViewController: UITableViewController {

        var pdfs = [FirstStep]()

    override func viewDidLoad() {
        super.viewDidLoad()

        var newPdf = FirstStep(name: "First People To Call List", filename: "firstpeople")
        pdfs.append(newPdf)

        newPdf = FirstStep(name: "Top 5 Things To Do In An Emergency", filename: "top5")
        pdfs.append(newPdf)

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return pdfs.count
    }


    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("pdfCell", forIndexPath: indexPath) as UITableViewCell

        // Configure the cell...

        var currentFirstSteps = pdfs[indexPath.row]
        cell.textLabel?.text = currentFirstSteps.name
        cell.textLabel?.numberOfLines = 0;

        // Retrieve an image
        var myImage = UIImage(named: "pdf")
        cell.imageView?.image = myImage

        return cell
    }

    override func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {

        return "First Step"

    }

    override func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat{
        return 50
    }

        var secondScene = segue.destinationViewController as DisplayFirstStepsViewController

        // Pass the selected object to the new view controller.
        if let indexPath = self.tableView.indexPathForSelectedRow() {
            let selectedPdf = pdfs[indexPath.row]
            secondScene.currentFirstSteps = selectedPdf
        }

    }


}

这是我在UIViewController中的UIWebView：

import UIKit

class DisplayFirstStepsViewController: UIViewController {

    @IBOutlet weak var currentDocument: UIWebView!

    var currentFirstSteps : FirstStep?

    override func viewDidLoad() {
        super.viewDidLoad()

        var pdfLoc = NSURL(fileURLWithPath:NSBundle.mainBundle().pathForResource((named: currentFirstSteps!.filename), ofType:"pdf")!)
        var request = NSURLRequest(URL: pdfLoc!);



        self.currentDocument.loadRequest(request);


        navigationController?.hidesBarsOnSwipe = true

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

这是我的MenuTableViewController：

import UIKit

class MyMenuTableViewController: UITableViewController {

    var eachSection = ["Home","First Steps","Communication","Equipment & Supplies", "Computer Systems","Critical Vendor Contact Info"]
    var selectedMenuItem : Int = 0
    override func viewDidLoad() {
        super.viewDidLoad()

        // Customize apperance of table view
        tableView.contentInset = UIEdgeInsetsMake(64.0, 0, 0, 0) //
        tableView.separatorStyle = .None
        tableView.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.6)
        tableView.scrollsToTop = false




        // Preserve selection between presentations
        self.clearsSelectionOnViewWillAppear = false

        tableView.selectRowAtIndexPath(NSIndexPath(forRow: selectedMenuItem, inSection: 0), animated: false, scrollPosition: .Middle)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // MARK: - Table view data source

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        // Return the number of sections.
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // Return the number of rows in the section.
        return 6
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        var cell = tableView.dequeueReusableCellWithIdentifier("CELL") as? UITableViewCell



        if (cell == nil) {
            cell = UITableViewCell(style: UITableViewCellStyle.Default, reuseIdentifier: "CELL")
            cell!.backgroundColor = UIColor.clearColor()
            cell!.textLabel?.textColor = UIColor.whiteColor()

            cell!.textLabel?.numberOfLines = 0;
            let selectedBackgroundView = UIView(frame: CGRectMake(0, 0, cell!.frame.size.width, cell!.frame.size.height))
            selectedBackgroundView.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.4)
            cell!.selectedBackgroundView = selectedBackgroundView

        }

        cell!.textLabel?.text = eachSection[indexPath.row]

        return cell!
    }


    override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {

        return 50.0
    }

    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

        println("did select row: \(indexPath.row)")

        if (indexPath.row == selectedMenuItem) {
            return
        }
        selectedMenuItem = indexPath.row

        //Present new view controller
        let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main",bundle: nil)
        var destViewController : UIViewController
        switch (indexPath.row) {
        case 0:
            destViewController = mainStoryboard.instantiateViewControllerWithIdentifier("Home") as UIViewController
            break
        case 1:
            destViewController = mainStoryboard.instantiateViewControllerWithIdentifier("FirstSteps") as UIViewController
            break
        case 2:
            destViewController = mainStoryboard.instantiateViewControllerWithIdentifier("Emergency") as UIViewController
            break
        case 3:
            destViewController = mainStoryboard.instantiateViewControllerWithIdentifier("EmergencyEquip") as UIViewController
            break
        case 4:
            destViewController = mainStoryboard.instantiateViewControllerWithIdentifier("Computer") as UIViewController
            break
        case 5:
            destViewController = mainStoryboard.instantiateViewControllerWithIdentifier("Critical") as UIViewController
            break
        default:
            destViewController = mainStoryboard.instantiateViewControllerWithIdentifier("Home") as UIViewController
            break
        }
        sideMenuController()?.setContentViewController(destViewController)
    }

我的问题是菜单加载，我点击“页面”（表格视图控制器），然后点击表格视图单元格，然后将其带到带有PDF的UIWebView的UIViewController。当我点击返回表格时，菜单不再有效。我收到以下错误：

无法解析旧目录的绝对路径。

任何想法如何解决这个问题？在此先感谢！