Failed loading designated initializer core data - ios

Question

I have been struggling with creating a class to manage Core Data.
I cannot seem to get passed the "Failed to call designated initializer on NSManaged Object"
How can I fix this?
This is my created class to manage the data :
import Foundation
import CoreData
import UIKit
class Hours: NSManagedObject {
#NSManaged var date: NSDate
#NSManaged var startTime: NSDate
#NSManaged var endTime: NSDate
#NSManaged var totalTime: Double
override init(entity: NSEntityDescription, insertIntoManagedObjectContext context: NSManagedObjectContext?){
let entity = NSEntityDescription.entityForName("Hours", inManagedObjectContext: context!)
super.init(entity: entity!, insertIntoManagedObjectContext: context)
}
let appDel:AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
var context:NSManagedObjectContext {
get{
return appDel.managedObjectContext
}
}
class func insertTimes(date: NSDate, startTime:NSDate, endTime:NSDate,totalTime:Double) -> Hours{
let hour:Hours = Hours()
let newDate:Hours = NSEntityDescription.insertNewObjectForEntityForName("Hours", inManagedObjectContext: hour.context) as! Hours
print("date = \(date), start = \(startTime), end = \(endTime), total = \(totalTime)")
newDate.date = date
newDate.startTime = startTime
newDate.endTime = endTime
newDate.totalTime = totalTime
/*
newDate.setValue(date, forKey: "date")
newDate.setValue(startTime, forKey: "startTime")
newDate.setValue(endTime, forKey:"endTime")
newDate.setValue(totalTime, forKey: "totalTime")
*/
do{
try hour.context.save()
print("Succesfully saved")
}catch{
print("Unresolved save error")
}
return newDate
}
func returnDate(){
//Does not work YET
let request = NSFetchRequest(entityName: "Hours")
//request.returnsObjectsAsFaults = false
do{
let results = try context.executeFetchRequest(request)
print(results)
}catch{
print("Unresolved fetch error")
}
}
}
I try to call the method insertTimes with the following line of code, after I press a button.
#IBAction func saveData(sender: AnyObject) {
let inserted:Hours = Hours.insertTimes(date, startTime: startEndDate.startTime, endTime: startEndDate.endTime, totalTime: timeInterval)
}
Please note that all my variables are of the right types.
Source can be found on: https://github.com/bbriann123/PayDay/blob/master/Hours.swift

Answer 1

Look a these:
In AppDelegate you use "Loon Calculator" instead of "DayDataModel": https://github.com/bbriann123/PayDay/blob/master/Loon%20Calculator/AppDelegate.swift#L55 (the data model file name is clearly "DayDataModel": https://github.com/bbriann123/PayDay/tree/master/Loon%20Calculator/DayDataModel.xcdatamodeld/DayDataModel.xcdatamodel)
In the data model you don't specify "Hours" as the custom class of the "Hours" entity (look in the Core Data inspector)
Also, it's weird how you reach to the NSManagedObjectContext: https://github.com/bbriann123/PayDay/blob/master/Hours.swift#L25-L30
Maybe you need a better Core Data book (or whatever you're using to learn)?