Swift：从Server Response获取HTTP代码

Question

I'm using the following function in Swift to connect to a PHP Script on a server and then process my request:

func pushtoserveronclick() {
    var URL: NSURL = NSURL(string: "http://someurl.com/")!
    var request:NSMutableURLRequest = NSMutableURLRequest(URL:URL)
    request.HTTPMethod = "POST"
    var bodyData = "data=something&version=\(appVersion)"
    request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding);
    NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue())
        {
            (response, data, error) in                       
            println(response)                
    }
 }

When I run the app I get this returned as the response:

<NSHTTPURLResponse: 0x14e53170> { URL: http://someurl.com/ } { status code: 200, headers {
Connection = "Keep-Alive";
"Content-Type" = "text/html";
Date = "Fri, 05 Dec 2014 06:23:23 GMT";
"Keep-Alive" = "timeout=2, max=100";
Server = Apache;
"Transfer-Encoding" = Identity;

How would I get the status code that is being returned so I can perform a check on it and tell whether or not it's a connection issue?

Answer 1

NSURLConnection.sendAsynchronousRequest uses NSURLResponse in the type signature, but as long as you're connecting over HTTP, the instance is (usually) NSHTTPURLResponse, which has the statusCode.

You can check and cast it this way:

if let HTTPResponse = response as? NSHTTPURLResponse {
    let statusCode = HTTPResponse.statusCode
}