RxSwift Alamofire Session - 错误 - 表达式类型不明确，没有更多上下文

Question

我尝试创建一个可观察的请求。但我错过了一些东西。我不明白缺少了什么？

我做了和this doc, this, this, etc.

func performRequest<T: Codable>(route: BaseRequestProtocol, withCookie: Bool = true) -> Observable<T> {
        let encoding: ParameterEncoding = route.method == .get ? URLEncoding.default : JSONEncoding.default
        
        var headers: HTTPHeaders = [
            "Accept": "application/json",
            "Content-Type": "application/json; charset=utf-8"
        ]
        if withCookie {
            headers["Cookie"] = SessionManager.shared.getCookie()
        }

        print(headers)
        print(route.path)

        let task = self.beginBackgroundTask()
        return Observable<T>.create { (observer) -> Disposable in
            guard let currentSession = self.session else { return Disposables.create {
                observer
            } }
            
            let request = currentSession.rx.request(route.method,
                                                    (URL(string: route.path)) ?? URLConvertible,
                                                    parameters: route.body,
                                                    encoding: encoding,
                                                    headers: headers)
                .responseJSON()
                .observe(on: MainScheduler.instance)
                .subscribe { response in
                    self.endBackgroundTask(taskID: task)
                    switch response {
                    case .error(let error):
                        observer.onResponseError(error)
                    case .success(let result):
                        observer.onNext(result)
                    }
                } onError: { error in
                    observer.onResponseError(error)
                } onCompleted: {
                    observer.onCompleted()
                }
            
            return Disposables.create { request.cancel }
        }
        .asObservable() // <------ Type of expression is ambiguous without more context
    }

需要一些挑剔的眼光来帮助我错过什么！回复 回复

谢谢！