Question

从PFTableViewController中删除图像时出现此错误。我已经做了大量的搜索，我可以告诉commitEditingStyle中的代码是正确的。有人可以帮忙吗？

import Foundation

class profileImageTableViewController:PFQueryTableViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate{
    @IBOutlet weak var MenuViewButton: UIBarButtonItem!
    @IBOutlet weak var addImageButton: UIBarButtonItem!
     let imagePicker = UIImagePickerController()


override init(style: UITableViewStyle, className: String!) {
    super.init(style: style, className: className)
}

required init(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)

    // Configure the PFQueryTableView
    self.parseClassName = "ProfileImages"
    self.textKey = "pImage"
    self.pullToRefreshEnabled = true
    self.paginationEnabled = false
}

// Define the query that will provide the data for the table view
override func queryForTable() -> PFQuery {
    var query = PFQuery(className: "ProfileImages")
    var userid = PFUser.currentUser()?.objectId
    query.whereKey("userid", equalTo: userid!)
    query.whereKey("imageType", notEqualTo: "profileThumb")
    query.orderByAscending("createdAt")
    return query

}

override func viewDidLoad() {
    super.viewDidLoad()
    self.imagePicker.delegate = self
    //println( myStruct   )
}

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "imageCropSegue"{
        if let destination = segue.destinationViewController as? profileImageCropView {
            if let profileIndex = tableView.indexPathForSelectedRow()?.row {
                var index = NSIndexPath(forRow: profileIndex, inSection: 0)
                var cell = tableView.cellForRowAtIndexPath(index) as! profileImageCell
                println(destination.profileImageView)
                destination.profileImageView.image = cell.profileImageView.image //currently generates an error (separate issue)
            }
        }

    }
}

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject!) -> PFTableViewCell {
    var cell = tableView.dequeueReusableCellWithIdentifier("profileImages") as! profileImageCell!
    if cell == nil {
        cell = profileImageCell(style: UITableViewCellStyle.Default, reuseIdentifier: "profileImages")
    }
    var iType = object["imageType"] as! String

    //println(iType)
    if iType == "profile"{
        cell.profileImageButton.hidden = true
    }

    var file:PFFile = object["pImage"] as! PFFile
    cell.profileImageView.image = UIImage(named: file.name)
    cell.profileImageView.file = file
    cell.profileImageView.loadInBackground(nil)
    return cell
}

override func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool {
    return true
}

override func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
    if editingStyle == .Delete {
        // Delete the row from the data source
        let objectToDelete = objects?[indexPath.row] as! PFObject
        objectToDelete.deleteInBackgroundWithBlock {
            (success: Bool, error: NSError?) -> Void in
            if (success) {
                self.loadObjects()
            } else {
                println(error)
            }
        }
    }

}

@IBAction func addImageTapped(sender: UIBarButtonItem) {
    if(self.objects?.count < 5){
        self.imagePicker.allowsEditing = false
        self.imagePicker.sourceType = .PhotoLibrary
        self.imagePicker.modalPresentationStyle = .Popover
        presentViewController(imagePicker, animated: true, completion: nil)
        self.imagePicker.popoverPresentationController?.barButtonItem = sender
    }else{
        var alert = UIAlertController()
        self.presentViewController(alert.isNotification("Max images reached", buttonText: "ok", preferredStyle: UIAlertControllerStyle.Alert), animated: true, completion: nil)
    }

}


func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {
    if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage{
        var data:NSData = UIImageJPEGRepresentation(pickedImage, 0.5)
        var imageFile = PFFile(name: "profileimage.jpg", data: data)
        //imageView.contentMode = .ScaleAspectFill
        //imageView.image = pickedImage
        var myObject = PFObject(className: "ProfileImages")
        myObject["authorised"] = false
        myObject["userid"] = PFUser.currentUser()?.objectId!
        myObject["imageType"] = "gallery"
        myObject["pImage"] = imageFile
        myObject.saveInBackgroundWithBlock{(success:Bool,error:NSError?) -> Void in
            self.loadObjects()
        }

    }
    dismissViewControllerAnimated(true, completion: nil)
}

func imagePickerControllerDidCancel(picker: UIImagePickerController) {
    dismissViewControllerAnimated(true, completion: nil)
}

}

当我运行模拟器时，图像会从解析中删除，但一旦发生这种情况，我就会收到错误。

https://drive.google.com/file/d/0Bxds5-29-lhIR0I3MGswdFE1LUU/view?usp=sharing

这是loadObjects（）

的断点

Answer 1

我有完全相同的问题。

最后，我意识到我忘了删除＆＃39; objectToDelete＆＃39;来自＆＃39;对象＆＃39;在重新加载tableView之前。

Answer 2

我无法找到答案。最后，我最终使用了标准的UITableView，它可以毫无错误地删除行。

我原本认为PFQueryTableViewController的创建是为了更容易使用Parse的Table Views，但令人惊讶的是我能够用UITableView做同样的事情而几乎没有额外的代码。

PFTableViewController断言失败 - [UITableView _endCellAnimationsWithContext：]当试图删除

2 个答案: