我正在对一个服务器进行post调用，但我一直收到服务器证书无效的错误，所以经过研究，我发现我必须使用身份验证质询来信任服务器。（我打印身份验证挑战以确保它确实如此）但是调用的其余部分没有通过，我无法从我的服务器上取回信息，身份验证挑战之后什么都没有发生，通常我希望返回数据，但是什么也没发生，我的urlsessiondatadelegates也没有被调用（用break检查）。
有人能指出为什么会这样吗？代码：

var request = URLRequest(url: URL(string: "https://45.56.105.97:7915/search-v2")!)
request.httpMethod = "POST"
request.addValue("Basic ***********", forHTTPHeaderField: "Authorization")

 let task = URLSession(configuration: .default, delegate: self, delegateQueue: OperationQueue.main)
            task.dataTask(with: request) { (data, response, error) in
               print(error)
                print(data)
                if let responseData = NSString(data: data!, encoding: String.Encoding.utf8.rawValue){
                                    print("data: \(responseData)")
                                    self.parseXML(data!)

                                }
        }.resume()

委托方法：

func urlSession(_ session: URLSession, task: URLSessionTask, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
    print("did autherntcationchallenge = \(challenge.protectionSpace.authenticationMethod)")

    if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust  {
        print("send credential Server Trust")
        let credential = URLCredential(trust: challenge.protectionSpace.serverTrust!)
        challenge.sender!.use(credential, for: challenge)

    }else if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodHTTPBasic{
        print("send credential HTTP Basic")
        let defaultCredentials: URLCredential = URLCredential(user: "username", password: "password", persistence:URLCredential.Persistence.forSession)
        challenge.sender!.use(defaultCredentials, for: challenge)

    }else if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodNTLM{
        print("send credential NTLM")

    } else{
        challenge.sender!.performDefaultHandling!(for: challenge)
    }

}
func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive data: Data) {
    print("Data received: \(data)")
}

func urlSession(_ session: URLSession, dataTask: URLSessionDataTask, didReceive response: URLResponse, completionHandler: @escaping (URLSession.ResponseDisposition) -> Void) {

    print("Response received: \(response)")
}

func urlSession(_ session: URLSession, task: URLSessionTask, didCompleteWithError error: Error?) {
    print("something went wrong: \(error)")
}

func urlSession(_ session: URLSession, task: URLSessionTask, willPerformHTTPRedirection response: HTTPURLResponse, newRequest request: URLRequest, completionHandler: @escaping (URLRequest?) -> Void) {
    print("rep: \(response)")
}

运行后，我得到的打印是：
身份验证质询= NSURL身份验证方法服务器信任是否发送凭据服务器信任
我也看到过关于我只能使用闭包或委托方法来检索数据的对话，我尝试了所有方法都没有成功。

**我也知道我不应该只是盲目地信任服务器，但我试图找出为什么我不能收到数据回来，我知道这有严重的安全缺陷。