Question

我有通用类型的协议。下面的代码正确吗我收到错误消息：“无法推断出通用参数'T'”

我想念什么？

架构是VIPER，所以我有一个View，Presenter，Interactor ...

Protocols.swift

protocol OffersViewProtocol {
    var presenter: OffersPresenterProtocol? { get set }
    func setup()
    func displayResults()
}

protocol OffersPresenterProtocol {
    var interactor: OffersInteractorProtocol? { get set }
    var router: OffersRouterProtocol? { get set }
    func showResults<T: Codable>(for service: APIService,_ completion:  @escaping ResultsHandler<T>)
}

protocol OffersInteractorProtocol {
   func getResults<T: Codable>(for service: APIService,_ completion: @escaping ResultsHandler<T>)
}

Interactor.swift

class OffersInteractor: OffersInteractorProtocol {
    let dataManager = DataManagerService()
    func getResults<Offer>(for service: APIService, _ completion: @escaping ([Offer]?, ErrorHandler?) -> Void) {
        dataManager.get(for: service) { results in

        }
    }

}

Presenter.swift

class OffersPresenter: OffersPresenterProtocol {


    var interactor: OffersInteractorProtocol?

    var router: OffersRouterProtocol?

    func showResults<Offer>(for service: APIService, _ completion: @escaping ([Offer]?, ErrorHandler?) -> Void) {
        interactor?.getResults(for: service, { (results, error) in

        })
    }
}

Answer 1

    func showResults<Offer>(for service: APIService, _ completion: @escaping ([Offer]?, ErrorHandler?) -> Void) {
        interactor?.getResults(for: service, { (results:ResultType, error:Error) in

        })
    }

您应该明确指定类型，我在操场上尝试过，这样就可以了。

无法推断出通用参数“ T”-可编码

1 个答案: