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

Here's what happens:

1. When you call let sm = SaveModel(); you are creating a new instance of SaveModel.
2. SaveModel is a subclass of NSManagedObject
3. NSManagedObject has a designated initializer called init(_: insertIntoManagedObjectContext:)
4. Your subclass does not add any initializers of any kind, which means that you must call the superclass designated initializer.
5. You don't do this, so you get an error message which describes the exact problem.

You need to either call the NSManagedObject designated initializer or create your own designated initializer that calls the superclass designated initializer.