I'm trying to insert elements into Core Data using Swift in Xcode 6.3.1 and I am getting an error. I've adopted solutions from several Stackoverflow answers (listed at the bottom), but none are helping to resolve the issue.
I created another app to simplify the code and issues, hoping that it would provide greater benefit for others having this issue.
The Error: CoreData: warning: Unable to load class named 'Scratch.Test' for entity 'Test'. Class not found, using default NSManagedObject instead.
The Code: (Updated: Pre-Fix)
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(true)
let saveData = saveDataLabel.text
println(saveData)
let appDel = UIApplication.sharedApplication().delegate as! AppDelegate
let context = appDel.managedObjectContext!
let en = "Test"
let entity = NSEntityDescription.entityForName(en, inManagedObjectContext: context)
let test = Test(entity: entity!, insertIntoManagedObjectContext: context)
test.saveMe = saveData!
var error: NSError?
if !context.save(&error){
println("Could not save \(error), \(error?.userInfo)")
}
// let fetchRequest = NSFetchRequest(entityName: "Test")
// let fetchedEntities = appDel.managedObjectContext!.executeFetchRequest(fetchRequest, error: nil) as! [Test]
//
// if(fetchedEntities.count == 0){
// NSLog("I'm empty")
// } else {
// NSLog("\(fetchedEntities[0].saveMe)")
// }
}
The Data Model my apologies, I'm new here and not allowed to post an image
App Name: Scratch
- Scratch.xcdatamodeld
- - Test (with Class = Scratch.Test)
- - - saveMe (as String)
Code in Test.swift
import Foundation
import CoreData
@objc(Test)
class Test: NSManagedObject {
@NSManaged var saveMe: String
}
Code in AppDelegate.swift
import UIKit
import CoreData
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
// Override point for customization after application launch.
return true
}
// MARK: - Core Data stack
lazy var applicationDocumentsDirectory: NSURL = {
// The directory the application uses to store the Core Data store file. This code uses a directory named "self.com.AG.TaskIt" in the application's documents Application Support directory.
let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
return urls[urls.count-1] as! NSURL
}()
lazy var managedObjectModel: NSManagedObjectModel = {
// The managed object model for the application. This property is not optional. It is a fatal error for the application not to be able to find and load its model.
let modelURL = NSBundle.mainBundle().URLForResource("Scratch", withExtension: "momd")!
return NSManagedObjectModel(contentsOfURL: modelURL)!
}()
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {
// The persistent store coordinator for the application. This implementation creates and return a coordinator, having added the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail.
// Create the coordinator and store
var coordinator: NSPersistentStoreCoordinator? = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("Scratch.sqlite")
var error: NSError? = nil
var failureReason = "There was an error creating or loading the application's saved data."
if coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: url, options: nil, error: &error) == nil {
coordinator = nil
// Report any error we got.
var dict = [String: AnyObject]()
dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
dict[NSLocalizedFailureReasonErrorKey] = failureReason
dict[NSUnderlyingErrorKey] = error
error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)
// Replace this with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog("Unresolved error \(error), \(error!.userInfo)")
abort()
}
return coordinator
}()
lazy var managedObjectContext: NSManagedObjectContext? = {
// Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) This property is optional since there are legitimate error conditions that could cause the creation of the context to fail.
let coordinator = self.persistentStoreCoordinator
if coordinator == nil {
return nil
}
var managedObjectContext = NSManagedObjectContext()
managedObjectContext.persistentStoreCoordinator = coordinator
return managedObjectContext
}()
// MARK: - Core Data Saving support
func saveContext () {
if let moc = self.managedObjectContext {
var error: NSError? = nil
if moc.hasChanges && !moc.save(&error) {
// Replace this implementation with code to handle the error appropriately.
// abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
NSLog("Unresolved error \(error), \(error!.userInfo)")
abort()
}
}
}
}
I can't find anything that will get me past this error. Here are some of the solutions I have found that did not work:
