Swift Alamofire：如何获取HTTP响应状态代码

概述我想检索请求失败的HTTP响应状态代码(例如400，401，403，503等)(最好是成功)。在此代码中，我使用HTTP Basic执行用户身份验证，并希望能够在用户输入密码错误时通知用户身份验证失败。 Alamofire.request(.GET, "https://host.com/a/path").authenticate(user: "user", password: "typo") 我想检索请求失败的http响应状态代码(例如400，401，403，503等)(最好是成功)。在此代码中，我使用http Basic执行用户身份验证，并希望能够在用户输入密码错误时通知用户身份验证失败。

Alamofire.request(.GET,"https://host.com/a/path").authenticate(user: "user",password: "typo")    .responseString { (req,res,data,error) in        if error != nil {            println("STRING Error:: error:\(error)")            println("  req:\(req)")            println("  res:\(res)")            println("  data:\(data)")            return        }        println("SUCCESS for String")}    .responseJsON { (req,error) in        if error != nil {            println("JsON Error:: error:\(error)")            println("  req:\(req)")            println("  res:\(res)")            println("  data:\(data)")            return        }        println("SUCCESS for JsON")}

不幸的是，产生的错误似乎并不表示实际接收到http状态代码409：

STRING Error:: error:Optional(Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo=0x7f9beb8efce0 {NSErrorFailingURLKey=https://host.com/a/path,NSLocalizedDescription=cancelled,NSErrorFailingURLStringKey=https://host.com/a/path})  req:<NSMutableURLRequest: 0x7f9beb89d5e0> { URL: https://host.com/a/path }  res:nil  data:Optional("")JsON Error:: error:Optional(Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo=0x7f9beb8efce0 {NSErrorFailingURLKey=https://host.com/a/path,NSErrorFailingURLStringKey=https://host.com/a/path})  req:<NSMutableURLRequest: 0x7f9beb89d5e0> { URL: https://host.com/a/path }  res:nil  data:nil

另外，当发生错误时检索http主体是很好的，因为我的服务器端会在那里放置一个错误的文本描述。

问题
是否可以在非2xx响应时检索状态代码？
是否可以在2xx响应时检索特定的状态代码？
是否可以在非2xx响应时检索http主体？

谢谢！

对于Alamofire> = 4.0的Swift 3.x用户

Alamofire.request(urlString)        .responseString { response in            print("Success: \(response.result.isSuccess)")            print("Response String: \(response.result.value)")            var statusCode = response.response?.statusCode            if let error = response.result.error as? AFError {                  statusCode = error._code // statusCode private                                 switch error {                case .invalIDURL(let url):                    print("InvalID URL: \(url) - \(error.localizedDescription)")                case .parameterEnCodingFailed(let reason):                    print("Parameter enCoding Failed: \(error.localizedDescription)")                    print("Failure Reason: \(reason)")                case .multipartEnCodingFailed(let reason):                    print("Multipart enCoding Failed: \(error.localizedDescription)")                    print("Failure Reason: \(reason)")                case .responseValIDationFailed(let reason):                    print("Response valIDation Failed: \(error.localizedDescription)")                    print("Failure Reason: \(reason)")                    switch reason {                    case .datafileNil,.datafileReadFailed:                        print("Downloaded file Could not be read")                    case .missingContentType(let acceptableContentTypes):                        print("Content Type Missing: \(acceptableContentTypes)")                    case .unacceptableContentType(let acceptableContentTypes,let responseContentType):                        print("Response content type: \(responseContentType) was unacceptable: \(acceptableContentTypes)")                    case .unacceptableStatusCode(let code):                        print("Response status code was unacceptable: \(code)")                        statusCode = code                    }                case .responseSerializationFailed(let reason):                    print("Response serialization Failed: \(error.localizedDescription)")                    print("Failure Reason: \(reason)")                    // statusCode = 3840 ???? maybe..                }                print("Underlying error: \(error.underlyingError)")            } else if let error = response.result.error as? URLError {                print("URLError occurred: \(error)")            } else {                print("UnkNown error: \(response.result.error)")            }            print(statusCode) // the status code    }

(Alamofire 4包含一个全新的错误系统，查看here的详细信息)

对于Alamofire> = 3.0的Swift 2.x用户

Alamofire.request(.GET,urlString)      .responseString { response in             print("Success: \(response.result.isSuccess)")             print("Response String: \(response.result.value)")             if let alamoError = response.result.error {               let alamoCode = alamoError.code               let statusCode = (response.response?.statusCode)!             } else { //no errors               let statusCode = (response.response?.statusCode)! //example : 200             }}

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