This would probably be better-suited on the Xcode list than here as I think
it's a bug in Xcode.
I've had issues when trying out this new CoreData codegen feature. What fixes
it for me is to go to:
~/Library/Developer/Xcode/DerivedData
and delete the entire directory for the build of my project that is there and
then it re-generates everything correctly.
HTH,
Dave Reed
> On Jan 16, 2017, at 1:01 AM, Jean-Denis Muys via swift-users
> <swift-users@swift.org> wrote:
>
> Hi,
>
> Using Xcode 8.2.1 I just created a brand new document-based Cocoa application
> using Core Data and Swift. I created a single entity in the
> Document.xcdatamodeld file. I selected "Class Definition" in the CodeGen pop
> up menu in the inspector.
>
> My entity is named PHAudioFile.
>
> I then asked Xcode to generate the files with the "Create NSManagedObject
> subclasses". It generated two files:
>
> - PHAudioFile+CoreDataClass.swift
> - PHAudioFile+CoreDataProperties.swift
>
> But everything breaks. Building the project, I now get several errors similar
> to this:
>
> <unknown>:0: error: filename "PHAudioFile+CoreDataClass.swift" used twice:
> '/Users/jdmuys/Phoenix/PHAudioFile+CoreDataClass.swift' and
> '/Users/jdmuys/Library/Developer/Xcode/DerivedData/Phoenix-buxfnwoppzieggdrogkoajdyimri/Build/Intermediates/Phoenix.build/Debug/Phoenix.build/DerivedSources/CoreDataGenerated/Document/PHAudioFile+CoreDataClass.swift'
> <unknown>:0: note: filenames are used to distinguish private declarations
> with the same name
>
> More over, the Xcode editor shows many syntax errors in the generated files.
>
> PHAudioFile+CoreDataClass.swift contains this:
>
> import Foundation
> import CoreData
>
> @objc(PHAudioFile)
> public class PHAudioFile: NSManagedObject {
>
> }
>
> With this error on the "public class PHAudioFile" line:
>
> "Invalid redeclaration of PHAudioFile"
>
> PHAudioFile+CoreDataProperties.swift starts with this line:
>
> extension PHAudioFile {
>
> Which breaks with:
>
> "'PHAudioFile' is ambiguous for type lookup in this context"
>
> and of course every line thereafter breaks too.
>
> Searching for 'PHAudioFile' in my Xcode project, finds only those two files.
> In particular I can't find any other declaration for 'PHAudioFile'.
>
> Am I missing something, or is this broken?
>
> Thanks,
>
> Jean-Denis
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