带有核心数据未捕获的 NSExeption 类型异常的 SIGABRT
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【中文标题】带有核心数据未捕获的 NSExeption 类型异常的 SIGABRT【英文标题】：SIGABRT with coredata uncaught exception of type NSExeption 【发布时间】：2016-03-04 18:51:38 【问题描述】：我正在制作一个使用核心数据的应用。我正在尝试制作一个名为 saveButton 的按钮，它将文本保存在几个文本字段中。我的核心数据类是 SecondVCItem，当我点击保存按钮时，应用程序崩溃并出现以下错误：
“2016-03-04 12:26:23.799 OCP[664:12324] Interface Builder 文件中的未知类 _TtC3OCP9ImageView。 2016-03-04 12:26:50.552 OCP[664:12324] CoreData：错误：无法调用 NSManagedObject 类“OCP.SecondVCItem”上的指定初始化程序 2016-03-04 12:26:50.559 OCP[664:12324] *** 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“在实体中找不到密钥路径名称” 以 NSException 类型的未捕获异常终止"
奇怪的是，我没有在情节提要中两次分配任何东西，也没有不良的出口。我不知道为什么我不能保存这些文本字段。任何信息都是有帮助的。谢谢
import UIKit
import CoreData
class secondViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate
@IBOutlet var recTextField1: UITextField!
@IBOutlet var recTextField2: UITextField!
@IBOutlet var recTextField3: UITextField!
@IBOutlet var recButton1: UIButton!
@IBOutlet var recButton2: UIButton!
@IBOutlet var recButton3: UIButton!
@IBOutlet var editLocationButtonTapped: UIButton!
@IBOutlet weak var passwordTextField: UITextField!
@IBOutlet weak var usernameTextField: UITextField!
@IBOutlet var essayNumber: UITextField!
@IBOutlet var letterOrForm: UISegmentedControl!
@IBOutlet var requiredTesting: UITextField!
@IBOutlet var commonApp: UISegmentedControl!
@IBOutlet var imageView: UIImageView!
var imagePicker = UIImagePickerController()
var selectedCollege : Item!
@IBOutlet var locationEditingTextField: UITextField!
@IBOutlet weak var dateTextField: UITextField!
@IBOutlet weak var datePicker: UIDatePicker!
let coreDataDB = (UIApplication.sharedApplication().delegate as! AppDelegate).managedObjectContext
var items = [SecondVCItem]()
override func viewDidLoad()
super.viewDidLoad()
imagePicker.delegate = self
dateTextField.enabled = false
locationEditingTextField.text = selectedCollege.location
if let collegeImage = selectedCollege.image
let collegeImageUI = UIImage(data: collegeImage)
imageView.image = collegeImageUI
let request = NSFetchRequest(entityName: "SecondVCItem")
var results : [AnyObject]?
do
results = try coreDataDB!.executeFetchRequest(request)
catch
results = nil
if results != nil
self.items = results as! [SecondVCItem]
navigationItem.title = selectedCollege.name
locationEditingTextField.enabled = false
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissKeyboard")
view.addGestureRecognizer(tap)
@IBAction func saveButton(sender: UIButton)
let newItem = SecondVCItem(teacherRec1: recTextField1.text!, teacherRec2: recTextField2.text!, teacherRec3: recTextField3.text!, username: usernameTextField.text!, password: passwordTextField.text!, datepicker: datePicker, datepickertextfield: dateTextField.text!, reqTesting: requiredTesting.text!, numberOfEssays: essayNumber.text!, letterOrForm: letterOrForm.selectedSegmentIndex, commonApp: commonApp.selectedSegmentIndex, image: UIImage(named: "Question"), location: locationEditingTextField.text!, inManagedObjectContext: self.coreDataDB!)
self.items.append(newItem)
// CoreData save
newItem.username = usernameTextField.text!
newItem.password = passwordTextField.text!
newItem.teacherRec1 = recTextField1.text!
newItem.teacherRec2 = recTextField2.text!
newItem.teacherRec3 = recTextField3.text!
newItem.reqTesting = requiredTesting.text!
newItem.numberOfEssays = essayNumber.text!
newItem.datepickertextfield = dateTextField.text!
usernameTextField.text! = newItem.username!
passwordTextField.text! = newItem.password!
recTextField1.text! = newItem.teacherRec1!
recTextField2.text! = newItem.teacherRec2!
recTextField3.text! = newItem.teacherRec3!
requiredTesting.text! = newItem.reqTesting!
essayNumber.text! = newItem.numberOfEssays!
dateTextField.text! = newItem.datepickertextfield!
newItem.save(self.coreDataDB!)
// Reload Coredata data
// self.items = SecondVCItem().fetchAll(self.coreDataDB!)
self.items = SecondVCItem().fetchAll(self.coreDataDB!)
// Reload TableView
//self.collegeTableView.reloadData()
@IBAction func textFieldEditingDate(sender: UITextField)
let datePicker : UIDatePicker = UIDatePicker()
datePicker.datePickerMode = UIDatePickerMode.Date
sender.inputView = datePicker
datePicker.addTarget(self, action: Selector("datePickerValueChanged:"), forControlEvents: UIControlEvents.ValueChanged)
@IBAction func datePicker(sender: UIDatePicker)
let dateFormatter = NSDateFormatter()
dateFormatter.dateStyle = NSDateFormatterStyle.MediumStyle
dateFormatter.timeStyle = NSDateFormatterStyle.NoStyle
dateTextField.text = dateFormatter.stringFromDate(sender.date)
@IBAction func onTappedTeacherRec(sender: UIButton)
let recAlert = UIAlertController(title: "Add Teacher Recs", message: nil, preferredStyle: UIAlertControllerStyle.Alert)
recAlert.addTextFieldWithConfigurationHandler (textField) -> Void in
textField.placeholder = "Add First Teacher Name"
recAlert.addTextFieldWithConfigurationHandler (textField) -> Void in
textField.placeholder = "Add Second Teacher Name"
recAlert.addTextFieldWithConfigurationHandler (textField) -> Void in
textField.placeholder = "Add Third Teacher Name"
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)
recAlert.addAction(cancelAction)
let addAction = UIAlertAction(title: "Add Teachers", style: .Default)
(action) -> Void in
let firstTeacherField = (recAlert.textFields?[0])! as UITextField
let secondTeacherField = (recAlert.textFields?[1])! as UITextField
let thirdTeacherField = (recAlert.textFields?[2])! as UITextField
if firstTeacherField.text == ""
self.recTextField1.hidden = true
self.recButton1.hidden = true
else
self.recTextField1.hidden = false
self.recTextField1.text = firstTeacherField.text
self.recButton1.hidden = false
if secondTeacherField.text == ""
self.recTextField2.hidden = true
self.recButton2.hidden = true
else
self.recTextField2.hidden = false
self.recTextField2.text = secondTeacherField.text
self.recButton2.hidden = false
if thirdTeacherField.text == ""
self.recTextField3.hidden = true
self.recTextField3.text = thirdTeacherField.text
self.recButton3.hidden = true
else
self.recTextField3.hidden = false
self.recTextField3.text = thirdTeacherField.text
self.recButton3.hidden = false
firstTeacherField.text = self.recTextField1.text
secondTeacherField.text = self.recTextField2.text
thirdTeacherField.text = self.recTextField3.text
recAlert.addAction(addAction)
self.presentViewController(recAlert, animated: true, completion: nil)
@IBAction func editRec1(sender: UIButton)
if recTextField1.enabled == false
recButton1.setTitle("Save", forState: UIControlState.Normal)
recTextField1.enabled = true
else
recTextField1.enabled = false
recButton1.setTitle("Edit", forState: UIControlState.Normal)
//selectedCollege.location = recTextField1.text!
@IBAction func editRec2(sender: UIButton)
if recTextField2.enabled == false
recButton2.setTitle("Save", forState: UIControlState.Normal)
recTextField2.enabled = true
else
recTextField2.enabled = false
recButton2.setTitle("Edit", forState: UIControlState.Normal)
//selectedCollege.location = recTextField2.text!
@IBAction func editRec3(sender: UIButton)
if recTextField3.enabled == false
recButton3.setTitle("Save", forState: UIControlState.Normal)
recTextField3.enabled = true
else
recTextField3.enabled = false
recButton3.setTitle("Edit", forState: UIControlState.Normal)
//selectedCollege.location = recTextField3.text!
func dismissKeyboard()
//Causes the view (or one of its embedded text fields) to resign the first responder status.
view.endEditing(true)
@IBAction func editLocationButtonTapped(sender: UIButton)
if locationEditingTextField.enabled == false
editLocationButtonTapped.setTitle("Save new location", forState: UIControlState.Normal)
locationEditingTextField.enabled = true
else
locationEditingTextField.enabled = false
editLocationButtonTapped.setTitle("Edit Location", forState: UIControlState.Normal)
selectedCollege.location = locationEditingTextField.text!
@IBAction func editImage(sender: UIButton)
imagePicker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
presentViewController(imagePicker, animated: true, completion: nil)
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])
imagePicker.dismissViewControllerAnimated(true, completion:
let selectedImage = info[UIImagePickerControllerOriginalImage] as! UIImage
self.imageView.image = selectedImage
)
【问题讨论】：
【参考方案1】：该错误中有几个单独的问题。其中之一是：
CoreData：错误：调用 NSManagedObject 类 'OCP.SecondVCItem' 上的指定初始化程序失败
这是因为您在创建 SecondVCItem 时没有使用指定的初始化程序 (init(entity, insertIntoManagedObjectContext))。查看您的代码，这可能是由于这一行：
self.items = SecondVCItem().fetchAll(self.coreDataDB!)
SecondVCItem() 调用普通初始化程序 (init()) 而不是指定的初始化程序。但我怀疑您实际上希望 fetchAll 成为类方法，而不是实例方法。如果是这样，您将需要使用 class 关键字来定义它：
class func fetchAll(....
然后你可以使用类名调用方法不带括号：
self.items = SecondVCItem.fetchAll(self.coreDataDB!)
另一个问题是这样的：
*** 由于未捕获的异常 'NSInvalidArgumentException' 导致应用程序终止，原因：'keypath name not found in entity'
这可能是由这行引起的：
navigationItem.title = selectedCollege.name
检查Item的实体和类定义；看起来该实体没有name 属性。
【讨论】：
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