Extending generic objective c class in swift class

Question

So I am slowly adding more swift files to codebase. Suppose I have class in Objective c:

ListData<Type : CSJSONData *> : ServerData <CSListData>

I want to subclass it in swift class like this:

@objc class ArticlesData: ListData<Article>

Compiler gives me error:

Generic subclasses of '@objc' classes cannot have an explicit '@objc' because they are not directly visible from Objective-C
Replace '@objc ' with ''

But I need to have it @objc to keep available in my objc part of code ! How to do it ?

CRD · Accepted Answer · 2018-12-01 11:57:45Z

3

From The Swift Programming Language (4.2), Attributes:

The compiler implicitly adds the objc attribute to subclasses of any class defined in Objective-C. However, the subclass must not be generic, and must not inherit from any generic classes. You can explicitly add the objc attribute to a subclass that meets these criteria, to specify its Objective-C name as discussed below.

Unfortunately for you this is pretty definitive.

answered Dec 1, 2018 at 11:57

CRD

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Renetik Over a year ago

My development with swift in shared codebase can be named fighting with swift compiler and looking on build progress line ...

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