blocks|key|2922190|text|在响应完成中，可以从responseJSON对象中获取状态代码，该对象的类型为NSHTTPURLResponse?|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2922191|if+let+response+=+res+{
++++var+statusCode+=+response.statusCode
}|code-block|syntax|javascript|2922192|无论状态码是否在错误范围内，这都将起作用。有关更多信息，请查看NSHTTPURLResponse+documentation。|2922193|对于您的另一个问题，您可以使用responseString函数来获取原始响应体。您可以将其添加到responseJSON之外，这两个都将被调用。|2922194|.responseJson+{+(req,+res,+json,+error)+in
+++//+existing+code
}
.responseString+{+(_,+_,+body,+_)+in
+++//+body+is+a+String?+containing+the+response+body
}|2922195|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSHTTPURLResponse_Class/^0|A|C|13|I|0|0|V|V|0|0|F|E|1C|C|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|14|8|@]|D|@$9|15|A|16|1|17]]|E|$]]|$1|M|3|N|5|6|7|18|8|@$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|O|3|P|5|H|7|1D|8|@]|D|@]|E|$I|J]]|$1|Q|3|-4|5|6|7|1E|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

In your <code>responseJSON</code> completion, you can get the status code from the response object, which has a type of <code>NSHTTPURLResponse?</code>:

<pre><code>if let response = res {
 var statusCode = response.statusCode
}
</code></pre>

This will work regardless of whether the status code is in the error range. For more information, take a look at the <a href="https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSHTTPURLResponse_Class/" rel="nofollow noreferrer" title="documentation">NSHTTPURLResponse documentation</a>.

For your other question, you can use the <code>responseString</code> function to get the raw response body. You can add this in addition to <code>responseJSON</code> and both will be called.

<pre><code>.responseJson { (req, res, json, error) in
 // existing code
}
.responseString { (_, _, body, _) in
 // body is a String? containing the response body
}
</code></pre>

blocks|key|140755|text|您的错误指示由于某种原因操作正在被取消。我需要更多的细节来理解为什么。但我认为更大的问题可能是，由于您的端点https://host.com/a/path是假的，因此没有真正的服务器响应可供报告，因此您看到的是nil。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|140756|如果您点击了一个提供适当响应的有效端点，您应该会看到res的非nil值(使用Sam提到的技术)，形式是一个具有statusCode等属性的NSURLHTTPResponse对象。|140757|另外，为了清楚起见，error的类型是NSError。它会告诉您网络请求失败的原因。服务器端的失败状态码实际上是响应的一部分。|140758|希望这有助于回答您的主要问题。|140759|entityMap^0|1I|N|2X|3|0|Q|3|1J|A|1X|H|0|A|5|J|7|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]|$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|14|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|M|$]]

Your error indicates that the operation is being cancelled for some reason. I'd need more details to understand why. But I think the bigger issue may be that since your endpoint <code>https://host.com/a/path</code> is bogus, there is no real server response to report, and hence you're seeing <code>nil</code>. 

If you hit up a valid endpoint that serves up a proper response, you should see a non-nil value for <code>res</code> (using the techniques Sam mentions) in the form of a <code>NSURLHTTPResponse</code> object with properties like <code>statusCode</code>, etc.

Also, just to be clear, <code>error</code> is of type <code>NSError</code>. It tells you why the network request failed. The status code of the failure on the server side is actually a part of the response. 

Hope that helps answer your main question.

blocks|key|139765|text|适用于Alamofire+>+2.0的Swift+2.0用户|type|unstyled|depth|inlineStyleRanges|entityRanges|data|139766|Alamofire.request(.GET,+url)
++.responseString+{+_,+response,+result+in
++++if+response?.statusCode+==+200{
++++++//Do+something+with+result
++++}
}|code-block|syntax|javascript|139767|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For Swift 2.0 users with Alamofire > 2.0

<pre><code>Alamofire.request(.GET, url)
 .responseString { _, response, result in
 if response?.statusCode == 200{
 //Do something with result
 }
}
</code></pre>

blocks|key|139827|text|对于Swift+3.x+/+Swift+4.0+/+Swift+5.0用户，使用Alamofire+>=+4.0+/+Alamofire+>=+5.0|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|139828|139829|response.response?.statusCode|code-block|syntax|javascript|139830|139831|更详细的示例：|139832|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..
++++++++++++++++default:break
++++++++++++++++}

++++++++++++++++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
++++}+|139833|(Alamofire+4包含一个全新的错误系统，详情请查看+)|139834|适用于使用Alamofire+>=+3.0的Swift+2.x用户|139835|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
+++++++++++++}
}|139836|entityMap^0|2|9|E|9|Q|9|14|G|1N|G|0|0|0|0|0|0|0|5|G|M|9|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|19|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|1A|8|@]|D|@]|E|$J|K]]|$1|L|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1C|8|@]|D|@]|E|$]]|$1|O|3|P|5|I|7|1D|8|@]|D|@]|E|$J|K]]|$1|Q|3|R|5|6|7|1E|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1F|8|@$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]]|D|@]|E|$]]|$1|U|3|V|5|I|7|1K|8|@]|D|@]|E|$J|K]]|$1|W|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]]|X|$]]

For Swift 3.x / Swift 4.0 / Swift 5.0 users with Alamofire >= 4.0 / Alamofire >= 5.0 

<hr>

<pre><code>response.response?.statusCode
</code></pre>

<hr>

More verbose example:

<pre><code>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..
 default:break
 }

 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
 } 
</code></pre>

(Alamofire 4 contains a completely new error system, look <a href="https://github.com/Alamofire/Alamofire/blob/master/Documentation/Alamofire%204.0%20Migration%20Guide.md#errors" rel="noreferrer">here</a> for details)

For Swift 2.x users with Alamofire >= 3.0

<pre><code>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
 }
}
</code></pre>

blocks|key|139838|text|++++Alamofire
++++++++.request(.GET,+"REQUEST_URL",+parameters:+parms,+headers:+headers)
++++++++.validate(statusCode:+200..<300)
++++++++.responseJSON{+response+in

++++++++++++switch+response.result{
++++++++++++case+.Success:
++++++++++++++++if+let+JSON+=+response.result.value
++++++++++++++++{
++++++++++++++++}
++++++++++++case+.Failure(let+error):
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|139839|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> Alamofire
 .request(.GET, "REQUEST_URL", parameters: parms, headers: headers)
 .validate(statusCode: 200..&lt;300)
 .responseJSON{ response in

 switch response.result{
 case .Success:
 if let JSON = response.result.value
 {
 }
 case .Failure(let error):
 }
</code></pre>

blocks|key|2709692|text|在下面带有参数response的完成处理程序中，我发现http状态码在response.response.statusCode中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2709693|Alamofire.request(.POST,+urlString,+parameters:+parameters)
++++++++++++.responseJSON(completionHandler:+{response+in
++++++++++++++++switch(response.result)+{
++++++++++++++++case+.Success(let+JSON):
++++++++++++++++++++//+Yeah!+Hand+response
++++++++++++++++case+.Failure(let+error):
+++++++++++++++++++let+message+:+String
+++++++++++++++++++if+let+httpStatusCode+=+response.response?.statusCode+{
++++++++++++++++++++++switch(httpStatusCode)+{
++++++++++++++++++++++case+400:
++++++++++++++++++++++++++message+=+"Username+or+password+not+provided."
++++++++++++++++++++++case+401:
++++++++++++++++++++++++++message+=+"Incorrect+password+for+user+'\(name)'."
+++++++++++++++++++++++...
++++++++++++++++++++++}
+++++++++++++++++++}+else+{
++++++++++++++++++++++message+=+error.localizedDescription
+++++++++++++++++++}
+++++++++++++++++++//+display+alert+with+error+message
+++++++++++++++++}|code-block|syntax|javascript|2709694|entityMap^0|7|8|Z|S|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

In the completion handler with argument <code>response</code> below I find the http status code is in <code>response.response.statusCode</code>:

<pre><code>Alamofire.request(.POST, urlString, parameters: parameters)
 .responseJSON(completionHandler: {response in
 switch(response.result) {
 case .Success(let JSON):
 // Yeah! Hand response
 case .Failure(let error):
 let message : String
 if let httpStatusCode = response.response?.statusCode {
 switch(httpStatusCode) {
 case 400:
 message = "Username or password not provided."
 case 401:
 message = "Incorrect password for user '\(name)'."
 ...
 }
 } else {
 message = error.localizedDescription
 }
 // display alert with error message
 }
</code></pre>

blocks|key|2709727|text|或者使用模式匹配|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2709728|if+let+error+=+response.result.error+as?+AFError+{
+++if+case+.responseValidationFailed(.unacceptableStatusCode(let+code))+=+error+{
+++++++print(code)
+++}
}|code-block|syntax|javascript|2709729|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Or use pattern matching 

<pre><code>if let error = response.result.error as? AFError {
 if case .responseValidationFailed(.unacceptableStatusCode(let code)) = error {
 print(code)
 }
}
</code></pre>

blocks|key|138776|text|您可以通过alamofire检查以下代码的状态码处理程序|type|unstyled|depth|inlineStyleRanges|entityRanges|data|138777|++++let+request+=+URLRequest(url:+URL(string:"url+string")!)++++
++++Alamofire.request(request).validate(statusCode:+200..<300).responseJSON+{+(response)+in
++++++++switch+response.result+{
++++++++case+.success(let+data+as+[String:Any]):
++++++++++++completion(true,data)
++++++++case+.failure(let+err):
++++++++++++print(err.localizedDescription)
++++++++++++completion(false,err)
++++++++default:
++++++++++++completion(false,nil)
++++++++}
++++}|code-block|syntax|javascript|138778|如果状态码不是validate，则在切换情况下将进入失败|138779|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

you may check the following code for status code handler by alamofire

<pre><code> let request = URLRequest(url: URL(string:"url string")!) 
 Alamofire.request(request).validate(statusCode: 200..&lt;300).responseJSON { (response) in
 switch response.result {
 case .success(let data as [String:Any]):
 completion(true,data)
 case .failure(let err):
 print(err.localizedDescription)
 completion(false,err)
 default:
 completion(false,nil)
 }
 }
</code></pre>

if status code is not validate it will be enter the failure in switch case

blocks|key|2709801|text|我需要知道如何获得实际的错误代码编号。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2709802|我从别人那里继承了一个项目，我必须从他们之前为Alamofire设置的.catch子句中获取错误代码：|offset|length|style|CODE|2709803|}+.catch+{+(error)+in

++++guard+let+error+=+error+as?+AFError+else+{+return+}
++++guard+let+statusCode+=+error.responseCode+else+{+return+}

++++print("Alamofire+statusCode+num+is:+",+statusCode)
}|code-block|syntax|javascript|2709804|或如果需要从response值中获取，请遵循@mbryzinski's+answer|BOLD|2709805|Alamofire+...+{+(response)+in

++++guard+let+error+=+response.result.error+as?+AFError+else+{+return+}
++++guard+let+statusCode+=+error.responseCode+else+{+return+}

++++print("Alamofire+statusCode+num+is:+",+statusCode)
})|2709806|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/42862157/4833705^0|0|Z|6|0|0|0|1|6|8|M|K|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|13|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|14|8|@$D|15|E|16|F|O]|$D|17|E|18|F|G]]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|P|3|Q|5|J|7|1C|8|@]|9|@]|A|$K|L]]|$1|R|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|S|$T|$5|U|V|W|A|$X|Y]]]]

I needed to know how to get the actual error code number.

I inherited a project from someone else and I had to get the error codes from a <code>.catch</code> clause that they had previously setup for Alamofire:

<pre><code>} .catch { (error) in

 guard let error = error as? AFError else { return }
 guard let statusCode = error.responseCode else { return }

 print("Alamofire statusCode num is: ", statusCode)
}
</code></pre>

Or if you need to get it from the <code>response</code> value follow <a href="https://stackoverflow.com/a/42862157/4833705">@mbryzinski's answer</a>

<pre><code>Alamofire ... { (response) in

 guard let error = response.result.error as? AFError else { return }
 guard let statusCode = error.responseCode else { return }

 print("Alamofire statusCode num is: ", statusCode)
})
</code></pre>

blocks|key|2709826|text|对于Swift+3.x+/+Swift+4.0+/+Swift+5.0用户，使用Alamofire+>=+5.0|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2709827|使用请求修饰符来增加和减少超时间隔。|2709828|Alamofire的请求创建方法为定制提供了最常用的参数，但有时这些参数还不够。通过传递的值创建的URLRequests可以在创建请求时使用RequestModifier闭包进行修改。例如，要将URLRequest's+timeoutInterval设置为120秒，请修改闭包中的请求。|2709829|var+manager+=+Session.default
+manager.request(urlString,+method:+method,+parameters:+dict,+headers:+headers,+requestModifier:+{+$0.timeoutInterval+=+120+}).validate().responseJSON+{+response+in|code-block|syntax|javascript|2709830|或|2709831|RequestModifiers还可以使用尾随闭包语法。|2709832|var+manager+=+Session.default
+++++manager.request("https://httpbin.org/get")+{+urlRequest+in
++++urlRequest.timeoutInterval+=+60
++++urlRequest.allowsConstrainedNetworkAccess+=+false
}
.response(...)|2709833|entityMap^0|2|9|E|9|Q|9|14|G|0|0|0|A|2P|C|32|F|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|15|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|16|8|@$9|17|A|18|B|C]|$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1D|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1H|8|@]|D|@]|E|$]]|$1|S|3|T|5|L|7|1I|8|@]|D|@]|E|$M|N]]|$1|U|3|-4|5|6|7|1J|8|@]|D|@]|E|$]]]|V|$]]

For Swift 3.x / Swift 4.0 / Swift 5.0 users with Alamofire &gt;= 5.0
Used request modifier to increase and decrease the timeout interval.
Alamofire's request creation methods offer the most common parameters for customization but sometimes those just aren't enough. The URLRequests created from the passed values can be modified by using a RequestModifier closure when creating requests. For example, to set the URLRequest's timeoutInterval to 120 seconds, modify the request in the closure.
<pre><code>var manager = Session.default
 manager.request(urlString, method: method, parameters: dict, headers: headers, requestModifier: { $0.timeoutInterval = 120 }).validate().responseJSON { response in
</code></pre>
OR
RequestModifiers also work with trailing closure syntax.
<pre><code>var manager = Session.default
 manager.request(&quot;https://httpbin.org/get&quot;) { urlRequest in
 urlRequest.timeoutInterval = 60
 urlRequest.allowsConstrainedNetworkAccess = false
}
.response(...)
</code></pre>

I would like to retrieve the HTTP response status code (e.g. 400, 401, 403, 503, etc) for request failures (and ideally for successes too). In this code, I am performing user authentication with HTTP Basic and want to be able to message the user that authentication failed when the user mistypes their password.

<pre><code>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, res, data, error) in
 if error != nil {
 println("JSON Error:: error:\(error)")
 println(" req:\(req)")
 println(" res:\(res)")
 println(" data:\(data)")
 return
 }
 println("SUCCESS for JSON")
}
</code></pre>

Unfortunately, the error produced does not seem to indicate that an HTTP status code 409 was actually received:

<pre><code>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:&lt;NSMutableURLRequest: 0x7f9beb89d5e0&gt; { 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, NSLocalizedDescription=cancelled, NSErrorFailingURLStringKey=https://host.com/a/path})
 req:&lt;NSMutableURLRequest: 0x7f9beb89d5e0&gt; { URL: https://host.com/a/path }
 res:nil
 data:nil
</code></pre>

Additionally, it would be nice to retrieve the HTTP body when an error occurs because my server-side will put a textual description of the error there.

Questions 
Is it possible to retrieve the status code upon a non-2xx response? 
Is it possible to retrieve the specific status code upon a 2xx response? 
Is it possible to retrieve the HTTP body upon a non-2xx response?

Thanks!

Swift Alamofire: How to get the HTTP response status code

身份验证

服务器

Swift

JSON

我想检索HTTP响应状态代码(例如，400、401、403、503等)，以获取请求失败(理想情况下也是成功)。在这段代码中，我使用HTTP Basic执行用户身份验证，并希望能够在用户输入错误的密码时通知用户身份验证失败。Alamofire.request(.GET, "https://host.com/a/path"...

问Swift Alamofire:如何获取HTTP响应状态代码
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