ios - 推送 View : while an existing transition or presentation is occurring; the navigation stack will not be updated

Question

我在尝试推送 View Controller 时收到此错误。我从表格单元格中附加了一个 segue，pushViewController:animated:在现有的过渡或演示发生时调用；导航堆栈将不会更新。

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) -> Void in
        if records.count > 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!) -> Int {
    return 1;
}
func tableView(tableView: UITableView!, heightForHeaderInSection section: Int) -> Int {
    return 1
}
func tableView(tableView: UITableView!, viewForFooterInSection section: Int) -> UIView {
    var view = UIView(frame: CGRect.zeroRect)
    return view
}


func tableView(tableView: UITableView!, heightForFootInSection section: Int) -> Int {
    return 1
}

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

func tableView(tableView: UITableView!, cellForRowAtIndexPath indexPath: NSIndexPath!) -> 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?) -> 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 > 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

}

更新:好的，我已经安装了 xcode beta 5，现在模拟器和我的手机都收到了这个错误，这个错误在此版本之前不存在。有什么想法吗？

Answer 1

这似乎是您正在使用的 ECSlidingView 中的错误。查看他们的 issue tracker .有一种解决方法可以在某些情况下提供帮助，但恐怕在这里对您没有帮助。我们现在所能做的就是等待补丁或等待 Apple 修复他们在 Beta 5 中破坏的内容。

我决定把所有与 ECSliding 相关的东西都扔到窗外，重新开始使用 SWRevealViewController .切换过程非常轻松，我花了大约一个小时的时间来完成一个大约 20K LOC 的应用程序。这是我向遇到此问题的任何人推荐的内容。

现在有一个修复合并到 master 分支中。我也把它贴在这里供引用，它是由 SpruceGoose429 提供的，由 fcy 在 Github 上附加:

In ECSlidingViewController.m replace the following code:

- (id<UIViewControllerTransitionCoordinator>)transitionCoordinator {
    return self;
}

With this block:

- (id<UIViewControllerTransitionCoordinator>)transitionCoordinator
{
    // Return self if a transition is in progress (we're the transition coordinator).
    // Otherwise, defer to super.
    return ((_transitionInProgress)? self: [super transitionCoordinator]);
}

正如我提到的，这个修复在 ECSlidingViewController 的 2.0.3 版中。