Using a generic Swift class in Objective-C

Swift generic types cannot be used in Objective-C.

This excludes Swift-only features such as those listed here:
Generics
...

ios objective-c swift generics

There is a workaround for some situations, when you need to import Swift generic class into Objective-C.

Let's say you have Swift REST service, which uses Generics. I'm using Moya framework and that's how my service looks like:

 class AuthService: BaseService<AuthAPI> {    func register(email: String)  {       // ...     } }

It's inherited from base service using generics, so I can not use it directly in my Objective-C code.

So here is a workaround:

Lets create AuthServiceProtocol:

@objc protocol AuthServiceProtocol {    func register(email: String)}

Then let's create a factory for service (or a singleton method, no difference):

@objc class Services: NSObject {    static let authService: AuthServiceProtocol = AuthService()}

Then I'm able to call my generic Swift auth service from Objective-C code:

- (void)someObjcMethod {    [Services.authService registerWithEmail:self.email];}

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