ios - 未调用 didReceive 质询身份验证方法

Question

以下是我的代码。我正在尝试使用 didReceive 质询方法进行身份验证。 Apple 文档说，如果 session 任务需要身份验证，并且没有可用的有效凭据，则会调用“didReceive challenge”方法。但在这种情况下，它没有被调用。任何建议将被认真考虑。谢谢:)

func getServerResponse(){
    var request=URLRequest(url: URL(string: "http://dev.example.com/Api/Account")!)
    let configuration=URLSessionConfiguration.default
    request.httpMethod="GET"
    let task=URLSession.init(configuration: configuration).dataTask(with: request, completionHandler: {(data,response,error) -> Void in

        do {
            if let jsonResult = try JSONSerialization.jsonObject(with: data!, options: []) as? NSDictionary {
                print("Result-->\(jsonResult)")
                print((response as! HTTPURLResponse).statusCode)
            }
        } catch let error as NSError {
            print(error.localizedDescription)
        } 
    })

    task.resume()

}

func urlSession(_ session: URLSession, task: URLSessionTask, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
    let crdential = URLCredential.init(user:"userName", password: "password", persistence: URLCredential.Persistence.none)
    completionHandler(URLSession.AuthChallengeDisposition.useCredential, crdential)

}

Answer 1

委托(delegate)没有被调用，因为你没有首先设置委托(delegate)......

使用这个方法:

let task = URLSession(configuration: configuration, delegate: self, delegateQueue: nil)

此外，设置 URLSessionDataDelegate 并符合协议(protocol):

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

而不是将 dataTask 与完成处理程序一起使用，因为当您使用该方法时，它不会调用任何委托(delegate)方法。