Swift 如何在联合收割机中使用flatMap？

我正在编写一个

AppCore

，是一个框架，它的主要任务是做网络请求。 当我编码一个新端点时，我实现如下：

func getPerson(id: Int) -> AnyPublisher<Person?, Error> {
  let model = Model(id: id)
  //Endpoint contains a url, params, http method, etc etc
  let endpoint = Endpoint.getPerson(requestModel: model)
  let request: AnyPublisher<NetworkCoreData<PersonResponseModel>, Error> = service.request(target: endpoint)
  
    
  return request.flatMap { (response) -> AnyPublisher<Person?, Error> in
     //in this line response has a codable struct: PersonResponseModel, I want to use flatMap to convert PersonResponseModel to Person
  }
}

如果您想知道什么是

service.request

是执行请求的协议：

public protocol NetworkService {
    func request<T: Decodable>(target: NetworkTargetType) -> AnyPublisher<T, Error>
}

---

这就是为什么我不能使用

flatMap

？

似乎你只需要在最后添加

eraseToAnyPublisher

。

public protocol NetworkService {
    func request<T: Decodable>(target: NetworkTargetType) -> AnyPublisher<T, Error>
}

public struct NetworkCoreData<T: Decodable>: Decodable {
   public let data: T?
}