Xcode 正在寻找带点的核心数据实体名称；不编译

问题描述

我一直在做一个项目，最近升级到 Xcode 8 和 Swift 3.0 和 iOS 10.但自从我这样做以来，我一直无法编译.

我的每个实体都出现错误::0:错误:没有这样的文件或目录:''/Users/mark/Library/Developer/Xcode/DerivedData/.../.Account+CoreDataProperties.swift'每个案例都有一个 .实体名称前的(点)前缀:.Account+CoreDataProperties.swift.

我将代码生成从类别/扩展"更改为手动/无，我做了一个干净整洁的目录，删除了 DerivedData 目录.有趣的是，当我查看适当的目录时，那里有一个实际文件，只是没有点前缀.

这很令人困惑.谁能解释一下?我需要解决这个问题才能继续使用核心数据.

TIA标记

解决方案

点文件由 Xcode8 生成.请参阅

• 清理项目
• 清理派生数据文件夹

注意:即使您在项目中看不到生成的文件，Xcode 也有对它的引用，因此您可以编写扩展程序等.例如:

extension MyEntity {func doSomething() {//}}

此外，您可以在 Xcode 中命令+单击生成的文件.

2) 一种相当偏执但经得起考验的方法，忽略了新的 Xcode 功能

• 从项目中删除所有生成的 NSManagedObject 子类(如果存在).
• 在您的 .xcdatamodel 中将所有实体的 Codegen 设置为 Manual/None
• 清理项目
• 清理派生数据文件夹
• 重启Xcode
• 手动生成 NSManagedObject 子类(在编辑器"菜单中)
• 确保将这些文件添加到您的项目中
• 构建

如果问题仍然存在，请重复:

• 清理项目
• 清理派生数据文件夹
• 重启Xcode

I have been working on a project for a while, and recently upgraded to Xcode 8 and Swift 3.0 and iOS 10. But since I did that I have not been able to compile.

I am getting an error for each of my entities::0: error: no such file or directory: ''/Users/mark/Library/Developer/Xcode/DerivedData/.../.Account+CoreDataProperties.swift'Each case has a . (dot) prefix before the entity name: .Account+CoreDataProperties.swift.

I changed the Code Gen from "Category / Extension" to Manual / None, I do a clean and clean directory, an delete the DerivedData directory. Interestingly, when I look in the appropriate directory there is an actual file there, just without the dot prefix.

This is very confusing. Can anyone explain it? I need to solve this to be able to continue with core data.

TIAMark

解决方案

The dot files are generated by Xcode8. See WWDC2016. I ran into the same issue after having to delete derived data due to another issue.

Two possible fixes:

1) The recommended, modern approach

• Delete all generated NSManagedObject subclasses from your project, if exists.
• Set Codegento Class Definition in your .xcdatamodel for all entities
• Make sure Module is empty ("Global Namespace" in light gray) (workaround an Apple bug, see @Chris Hansons answer)

• Clean project
• Clean DerivedData folder

Note: Even you do not see the generated files in your project, Xcode has a reference to it, so you are able to write extensions and such. For instance:

extension MyEntity {
    func doSomething() {
        //
    }
}

Also, you can command+click to the generated file within Xcode.

2) A rather paranoid but bullet-prove approach, ignoring the new Xcode features

• Delete all generated NSManagedObject subclasses from your project, if exists.
• Set Codegento Manual/None in your .xcdatamodel for all entities
• Clean project
• Clean DerivedData folder
• Restart Xcode
• Manually generate NSManagedObject subclasses (in "Editor" menu)
• Make sure those files are added to your project
• build

If your problem persists, repeat:

• Clean project
• Clean DerivedData folder
• Restart Xcode

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