title: Push view: while an existing transition or presentation is occurring; the navigation stack will not be updated
body: <p>I'm receiving this error when trying to push a view controller.
  i've got a segue attached from table cell, 
  pushViewController:animated: called on  while an existing transition or presentation is occurring; the navigation stack will not be updated.</p>
  
  <pre><code>class PlaylistsViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UIGestureRecognizerDelegate {
  let ItemRecordName = "Playlists"
  var playlists = NSMutableArray()
  @IBOutlet var tableView: UITableView?
  var cloudm = CloudManager()
  var container: CKContainer?
  var publicDatabase: CKDatabase?
  var edgePan = UIScreenEdgePanGestureRecognizer()
  
  
  
  override func viewDidLoad() {
      super.viewDidLoad()
  
  
      self.setUpMenu()
      container = CKContainer.defaultContainer()
      publicDatabase = container?.privateCloudDatabase
  
      self.tableView!.contentInset = UIEdgeInsetsMake(64, 0, 0, 0)
  
  }
  func setUpMenu() {
  
      self.slidingViewController().topViewAnchoredGesture = ECSlidingViewControllerAnchoredGesture.Panning |  ECSlidingViewControllerAnchoredGesture.Tapping
  
      //self.navigationController.view.addGestureRecognizer(self.slidingViewController().panGesture)
      edgePan = UIScreenEdgePanGestureRecognizer(target: self, action: "menuButtonTapped")
     edgePan.edges = UIRectEdge.Left
      edgePan.delegate = self
      self.navigationController.view.addGestureRecognizer(edgePan)
  
  
      self.navigationController.navigationBar.translucent = true
  
      let icon = FAKIonIcons.naviconIconWithSize(40)
      icon.addAttribute(NSForegroundColorAttributeName, value: UIColor.whiteColor())
      let iconImage = icon.imageWithSize(CGSizeMake(40, 40))
  
      let plusicon = FAKIonIcons.ios7PlusEmptyIconWithSize(30)
      plusicon.addAttribute(NSForegroundColorAttributeName, value: UIColor.whiteColor())
      let plusiconImage = plusicon.imageWithSize(CGSizeMake(30, 30))
  
      let barButton = UIBarButtonItem(image: iconImage, style: UIBarButtonItemStyle.Plain, target: self, action: "menuButtonTapped")
      let barButton2 = UIBarButtonItem(image: plusiconImage, style: UIBarButtonItemStyle.Plain, target: self, action: "openNameForPlaylist")
      barButton2.tag = 1
      let negativeSpacer = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FixedSpace, target: nil, action: nil)
      let negativeSpacer2 = UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FixedSpace, target: nil, action: nil)
      negativeSpacer.width = -10
      negativeSpacer2.width = 0.0
  
      self.navigationItem.leftBarButtonItems = NSArray(objects: negativeSpacer, barButton)
      self.navigationItem.rightBarButtonItems = NSArray(objects: negativeSpacer2, barButton2)
  
  }
  override func viewDidAppear(animated: Bool)  {
      self.getPlaylists()
  }
  func menuButtonTapped () {
      self.slidingViewController().anchorTopViewToRightAnimated(true)
  }
  func getPlaylists() {
      cloudm.fetchPlaylistNames("Playlists", completionHandler: {(records: NSMutableArray) -&gt; Void in
          if records.count &gt; 0 {
              println("got Playlists")
              self.playlists = records
              self.tableView?.reloadData()
              //self.noFoodLabelAlpa(0, withDuration: 0, withDelay: 0)
  
  
          } else {
              println("dont got Playlists")
              //self.noFoodLabelAlpa(1, withDuration: 1, withDelay: 1.8)
          }
          })
  
  }
  override func didReceiveMemoryWarning() {
      super.didReceiveMemoryWarning()
      // Dispose of any resources that can be recreated.
  }
  func openNameForPlaylist() {
       var alert = UIAlertView(title: "Playlist Name", message: "Please choose a name for your Playlist",  delegate: self, cancelButtonTitle: "Done")
      alert.alertViewStyle = UIAlertViewStyle.PlainTextInput
      alert.show()
  }
  func alertView(alertView:UIAlertView, clickedButtonAtIndex buttonIndex: NSInteger){
  println(alertView.textFieldAtIndex(0).text)
      addPlaylist(alertView.textFieldAtIndex(0).text)
  }
  func addPlaylist(name: String) {
      if playlists.count == 10 {
          var alert = UIAlertView(title: "Playlist is full", message: "You've reached the maximum number of songs in your playlist, to add more please remove some", delegate: self, cancelButtonTitle: "ok")
          alert.show()
      } else {
          println("playlist count = \(self.playlists.count)")
          var newRecord: CKRecord = CKRecord(recordType: ItemRecordName)
          //var playlistName = "Playlist \(self.playlists.count + 1)"
          newRecord.setObject(name, forKey: "playlistName")
          self.cloudm.saveRecord(newRecord)
  
          self.playlists.insertObject(newRecord, atIndex: 0)
          //self.playlists.addObject(newRecord)
          self.playlists.sortUsingDescriptors([NSSortDescriptor(key: "playlistName", ascending: true)])
          var indexPath = NSIndexPath(forRow: 0, inSection: 0)
          self.tableView?.insertRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
  
  
      }
  }
  func numberOfSectionsInTableView(tableView: UITableView!) -&gt; Int {
      return 1;
  }
  func tableView(tableView: UITableView!, heightForHeaderInSection section: Int) -&gt; Int {
      return 1
  }
  func tableView(tableView: UITableView!, viewForFooterInSection section: Int) -&gt; UIView {
      var view = UIView(frame: CGRect.zeroRect)
      return view
  }
  
  
  func tableView(tableView: UITableView!, heightForFootInSection section: Int) -&gt; Int {
      return 1
  }
  
  func tableView(tableView: UITableView!, numberOfRowsInSection section: Int) -&gt; Int {
      return playlists.count
  }
  
  func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -&gt; UITableViewCell!  {
      let CellIndentifier: NSString = "playlistCell"
  
      var cell : UITableViewCell  = tableView.dequeueReusableCellWithIdentifier(CellIndentifier) as UITableViewCell
      var selectedView = UIView(frame: CGRectMake(0,0,cell.contentView.frame.size.width, cell.contentView.frame.size.height))
      cell.selectedBackgroundView = selectedView
  
  
      cell.backgroundColor = UIColor.clearColor()
  
  
      var records: CKRecord = self.playlists[indexPath.row] as CKRecord
      var playlist:String = records.objectForKey("playlistName") as String
      println("Playlists are \(playlist)")
  
      cell.textLabel.text = playlist
  
  
      return cell
  }
  func tableView(tableView: UITableView?, canEditRowAtIndexPath indexPath: NSIndexPath?) -&gt; Bool {
      // Return NO if you do not want the specified item to be editable.
      return true
  }
  
  func tableView(tableView: UITableView!, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath!) {
      if editingStyle == .Delete {
          // Delete the row from the data source
          self.cloudm.deleteRecord(self.playlists[indexPath.row] as CKRecord)
          self.playlists.removeObjectAtIndex(indexPath.row)
          tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
      }
  }
  
  func tableView(tableView: UITableView!, didEndEditingRowAtIndexPath indexPath: NSIndexPath!) {
      if playlists.count &gt; 0 {
          //self.noFoodLabelAlpa(0, withDuration: 0, withDelay: 0)
  
      } else {
          //self.noFoodLabelAlpa(1, withDuration: 1, withDelay: 0)
      }
  }
  override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!)  {
      var indexPath = self.tableView!.indexPathForSelectedRow()
      var record: CKRecord = self.playlists[indexPath.row] as CKRecord
      let playlistOpen: PlaylistsOpenViewController = segue.destinationViewController as PlaylistsOpenViewController
      playlistOpen.parentRecordID = record.recordID.recordName
      playlistOpen.cloudm = self.cloudm
  
  }
  </code></pre>
  
  <p>}</p>
  
  <p>UPDATE:
  Ok so i've installed xcode beta 5, and now both the simulator and my phone are receiving this error, which did not exist prior to this release.. any ideas at all?</p>