CoreData: error: Failed to call designated initializer on NSManagedObject custom class

Question

When I call the function CacheStation I get the error: CoreData: error: Failed to call designated initializer on NSManagedObject class SaveModel. Nothing more nothing less. How

Answer 1

This line:

let sm = SaveModel();

uses the standard init() method to create an instance of SaveModel, but NSManagedObjects must be initialised using the designated initialiser:

init(entity entity: NSEntityDescription, insertIntoManagedObjectContext context: NSManagedObjectContext?)

(or, as in your CacheStations method, using NSEntityDescription.insertNewObjectForEntityForName(_, inManagedObjectContext: moc) which calls the designated initialiser).

Since it seems sm is created only to have an instance on which to call CacheStations, I would change that method to a class method:

class func CacheStations(){

and change your saveShizzle method to use the class method:

@IBAction func saveShizzle(sender: AnyObject) {
    SaveModel.CacheStations();
}