为什么在定义文件之外看不到我的Swift类的扩展名? [英] Why is the extension of my Swift class not visible outside the defining file?

问题描述

我的CoreData模型有一个Xcode生成的NSManagedObject类.

I have an Xcode-generated NSManagedObject class for my CoreData model.

@objc(SomeClass) class SomeClass : NSManagedObject { /* ... */ }

它在名为"SomeClass.swift"的文件中定义.我想扩展此类，所以我创建了"SomeClassExtension.swift".我这样定义扩展名:

It is defined in a file named 'SomeClass.swift'. I would like to extend this class, so I created 'SomeClassExtension.swift'. I define the extension like this:

extension SomeClass {
    class func typeMethod1() {}
    func instanceMethod2() {}
}

这些扩展方法可以在此定义文件中使用，但在该文件外部不可见.是什么导致此问题?

These extension methods can be used within this defining file, but they are not visible outside of it. What is causing this issue?

推荐答案

听起来您的新文件(SomeClassExtension.swift)没有包含在正确的目标中.通过在Xcode中选择文件，然后打开文件检查器"(查看"菜单>实用程序">显示文件检查器")，仔细检查文件的目标成员资格.确保在目标成员身份标题下检查了正确的目标.

It sounds like your new file (SomeClassExtension.swift) didn't get included in the correct target. Double-check the file's target membership by selecting the file in Xcode, then opening the "File Inspector" (View menu > Utilities > Show File Inspector). Make sure the correct targets are checked under the Target Membership heading.

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