Ich versuche gerade Core Data in mein Projekt zu integrieren. Zuerst benutzte ich keine Core Data, entschied mich dann aber dafür, also erstellte ich ein neues Projekt und zog dann den Code aus dem AppDelegate in das Projekt, an dem ich gerade arbeitete. Der Name meines Projekts ist SimpleRunner, bisher habe ich nur eine Entität, Run. In meinem SimpleRunner.xcdatamodel habe ich Run Entity erstellt und es meiner Run-Klasse zugewiesen. Hier ist ein Bild von diesen Run Entity und hier ist ich die Run-Klasse, um es pic .Allerdings zuweisen, wenn ich versuche, einen Lauf speichern ich die folgende Fehlermeldung erhalten:Kerndatenfehler mit swift: [SimpleRunner.Run setTime:]: nicht erkannter Selektor an Instanz gesendet
beenden app aufgrund nicht abgefangene Ausnahme ‚NSInvalidArgumentException‘, Grund : '- [SimpleRunner.Run setTime:]: nicht erkannter Selektor an Instanz gesendet.
Ich weiß, es ist etwas klein, jemand bitte helfen!
Run Object
import CoreData
class Run:NSManagedObject{
@NSManaged var time:String
@NSManaged var distance:String
@NSManaged var runImage:Data?
}
AppDelegate
// 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 "derivative.DataDemo" in the application's documents Application Support directory.
let urls = FileManager.default().urlsForDirectory(.documentDirectory, inDomains: .userDomainMask)
return urls[urls.count-1]
}()
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 = Bundle.main().urlForResource("SimpleRunner", withExtension: "momd")!
return NSManagedObjectModel(contentsOf: modelURL)!
}()
lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator = {
// The persistent store coordinator for the application. This implementation creates and returns 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
let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let url = self.applicationDocumentsDirectory.appendingPathComponent("SimpleRunner.sqlite")
var failureReason = "There was an error creating or loading the application's saved data."
do {
try coordinator.addPersistentStore(ofType: NSSQLiteStoreType, configurationName: nil, at: url, options: nil)
} catch {
// 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 as NSError
let wrappedError = 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 \(wrappedError), \(wrappedError.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
var managedObjectContext = NSManagedObjectContext(concurrencyType: .mainQueueConcurrencyType)
managedObjectContext.persistentStoreCoordinator = coordinator
return managedObjectContext
}()
// MARK: - Core Data Saving support
func saveContext() {
if managedObjectContext.hasChanges {
do {
try managedObjectContext.save()
} catch {
// 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.
let nserror = error as NSError
NSLog("Unresolved error \(nserror), \(nserror.userInfo)")
abort()
}
}
}
ERROR speichern Run-Methode, wo run.time = Zeit
func saveRun(time:String,distance:String,image:UIImage){
run = NSEntityDescription.insertNewObject(forEntityName: "Run", into: managedObjectContext) as! Run
run.time = time <--------- WHERE THE ERROR IS
run.distance = distance
run.runImage = UIImagePNGRepresentation(image)
do {
try managedObjectContext.save()
} catch {
print(error)
return
}
}
Ihre Run-Entität hat kein Attribut namens "time". – OOPer
Ich änderte das, löschte die App von meinem Handy, dann lief es wieder. Ich bekomme immer noch den gleichen Fehler – Derivative
Versuchen Sie sauber zu bauen und Ihren Simulator aufzuräumen. – OOPer