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core-datansmanagedobjectios10xcode8

Xcode 8 generates broken NSManagedObject subclasses for iOS 10

I updated my iOS app project recently to iOS 10. Now I'm trying to change the Core Data Model of my app but the new NSManagedObject subclasses which Xcode generates are broken. I also tried to fix the subclasses manual but this doesn't work.

The minimum tools version for the Core Data Model is set to Xcode 7.0 and code generation language is set to Swift.

This is the code which Xcode generates:

import Foundation
import CoreData
import 

extension Group {

    @nonobjc public class func fetchRequest() -> NSFetchRequest {
        return NSFetchRequest(entityName: "Group");
    }

    @NSManaged public var name: String?
    @NSManaged public var platform: NSNumber?
    @NSManaged public var profiles: NSOrderedSet?

}

// MARK: Generated accessors for profiles
extension Group {

    @objc(insertObject:inProfilesAtIndex:)
    @NSManaged public func insertIntoProfiles(_ value: SavedProfile, at idx: Int)

    @objc(removeObjectFromProfilesAtIndex:)
    @NSManaged public func removeFromProfiles(at idx: Int)

    @objc(insertProfiles:atIndexes:)
    @NSManaged public func insertIntoProfiles(_ values: [SavedProfile], at indexes: NSIndexSet)

    @objc(removeProfilesAtIndexes:)
    @NSManaged public func removeFromProfiles(at indexes: NSIndexSet)

    @objc(replaceObjectInProfilesAtIndex:withObject:)
    @NSManaged public func replaceProfiles(at idx: Int, with value: SavedProfile)

    @objc(replaceProfilesAtIndexes:withProfiles:)
    @NSManaged public func replaceProfiles(at indexes: NSIndexSet, with values: [SavedProfile])

    @objc(addProfilesObject:)
    @NSManaged public func addToProfiles(_ value: SavedProfile)

    @objc(removeProfilesObject:)
    @NSManaged public func removeFromProfiles(_ value: SavedProfile)

    @objc(addProfiles:)
    @NSManaged public func addToProfiles(_ values: NSOrderedSet)

    @objc(removeProfiles:)
    @NSManaged public func removeFromProfiles(_ values: NSOrderedSet)

}

Edit: These are the specific errors which Xcode gives:

1. Group+CoreDataProperties.swift:13:1: Expected identifier in import declaration (the empty import)
2. Group+CoreDataProperties.swift:13:11: 'Group' is ambiguous for type lookup in this context
3. Group+CoreDataProperties.swift:15:16: Cannot specialize non-generic type 'NSFetchRequest'
4. Group+CoreDataProperties.swift:26:11: 'Group' is ambiguous for type lookup in this context
4. Group+CoreDataProperties.swift:43:82: 'SavedProfile' is ambiguous for type lookup in this context
Solution

  • I finally got mine to work. Here is what I did. (Flights is one of my entities)

    I setup the xcdatamodeld as follows

    enter image description here

    And then the entity as

    enter image description here

    Then I used Editor -> Create NSManagedObject Subclass

    This creates two files for my flights entity

    Flights+CoreDataProperties.swift

    Flights+CoreDataClass.swift

    I renamed Flights+CoreDataClass.swift to Flights.swift

    Flights.swift is just

    import Foundation
import CoreData

@objc(Flights)
public class Flights: NSManagedObject {

}

    Flights+CoreDataProperties.swift is

    import Foundation
import CoreData


extension Flights {

    @nonobjc public class func fetchRequest() -> NSFetchRequest<Flights> {
        return NSFetchRequest<Flights>(entityName: "Flights");
    }

    @NSManaged public var ...
}

    This appears to work for me.I could not get Codegen to work in any other way, even though I tried many of the suggestions that were out there.

    Also this had me scratching my head for a while and I add it as an assist. Don't forget with the new Generics version of the FetchRequest you can do this

    let fetchRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: "Flights")