xcode 8.2 swift 3 Core data — 使用未解析的标识符

Question

I have created a core data project in xcode 8.2, After that I created an entity say "TestEntity" in .xcdatamodeld

I am creating entity object by using following code as per given in some tutorials for swift3. enter link description here

    let appDele = (UIApplication.shared.delegate) as! AppDelegate
    let cont = appDele.persistentContainer.viewContext

    let ent  = TestEntity(context:cont)

But I got an error "use of unresolved identifier 'TestEntity'."

how to resolve that error.

Answer 1

Product->Buld for testing 为我解决了这个问题（由于一些奇怪的原因，它解决了大多数未解决的标识符错误）

Answer 2

I solved it by changing import Foundation to import UIKit .

Because UIApplication isn't included in Foundation framework.

Answer 3

"use of unresolved identifier 'TestEntity'."Means that you are trying to use a class/struct that is declared nowhere. Possibly you need to generate the NSManagedObjects for your entities.

Answer 4

Try the following things:

1. Clean and Build the project after you've added the Entity to your CoreData file
2. Delete the Entity and create it again - redo the step 1
3. Close and reopen xcode - redo step 1 and 2
4. Update xcode to newest version (worked for me) and redo step 1,2 and 3

I can't tell you what solved the issue. But I glad it works now!

Answer 5

关闭 Xcode 并重新打开它对我有用。

Answer 6

In my case it was because I had renamed the entity in the .xcdatamodeld file.

But renaming the entity in the side menu only applied to the Name property, and not also the Class Name. After also renaming the Class Name in the Data Model inspector, it worked.

Answer 7

Just ran into this same problem, was using Xcode-generated Managed Object subclasses. Removed references from Xcode project and re-added them. Problem went away.

Answer 8

将import Foundation更改为import UIKit并检查，如果出现同样的问题，关闭 Xcode 并重新打开它会工作