HTTPS Webservice call in swift & serverTrust code

 Server Trust Code:

 func URLSession(session: NSURLSession, task: NSURLSessionTask, didReceiveChallenge challenge: NSURLAuthenticationChallenge, completionHandler: (NSURLSessionAuthChallengeDisposition, NSURLCredential?) -> Void)
{

   if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust

   {

       let credential = NSURLCredential(forTrust: challenge.protectionSpace.serverTrust!)

       completionHandler(NSURLSessionAuthChallengeDisposition.UseCredential,credential);

   }

   else

   {

       completionHandler(NSURLSessionAuthChallengeDisposition.CancelAuthenticationChallenge, nil)

   }

}

In Plist we can add below code:

<key>NSAppTransportSecurity</key>

    <dict>

        <key>NSExceptionDomains</key>

        <dict>

            <key>"Your url"</key>

            <dict>

                <key>NSIncludesSubdomains</key>

                <true/>

                <key>NSExceptionAllowsInsecureHTTPLoads</key>

                <true/>

                <key>NSExceptionRequiresForwardSecrecy</key>

                <true/>

                <key>NSExceptionMinimumTLSVersion</key>

                <string>TLSv1.2</string>

                <key>NSThirdPartyExceptionAllowsInsecureHTTPLoads</key>

                <false/>

                <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>

                <true/>

                <key>NSThirdPartyExceptionMinimumTLSVersion</key>

                <string>TLSv1.2</string>

                <key>NSRequiresCertificateTransparency</key>

                <false/>

            </dict>

        </dict>

    </dict>

HTTPS Web service call Using NSURLSession 

let parameters = ["UserEmail":userMailID, "DeviceUDID": stringUDID] as Dictionary<String, String>

let url = NSURL (string: "Your URL") //change the url

let request = NSMutableURLRequest(URL: url!)

let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()

let session = NSURLSession(configuration: NSURLSessionConfiguration.defaultSessionConfiguration(), delegate: nil, delegateQueue: NSOperationQueue.mainQueue())

                

request.HTTPMethod = "POST" //set http method as POST

request.HTTPBody = try! NSJSONSerialization.dataWithJSONObject(parameters, options: [])

request.addValue("application/json", forHTTPHeaderField: "Content-Type")

request.addValue("application/json", forHTTPHeaderField: "Accept")

//                request.timeoutInterval = 100

let task = session.dataTaskWithRequest(request)

{

    data, response, error in

    guard data != nil else

    {

      // Error response

    }                 

        //RESPONSE HEADER RESULT

                    

        let httpsResponse = response as? NSHTTPURLResponse

        let str = httpsResponse!.allHeaderFields as NSDictionary

        let tokenStr = str["TokenAPI"] as! String

         GlobalData.sharedManager.tokenAPI = tokenStr

         let jsonStr = NSString(data: data!, encoding: NSUTF8StringEncoding)

         self.json = try NSJSONSerialization.JSONObjectWithData      ((jsonStr?.dataUsingEncoding(NSUTF8StringEncoding)!)!, options: .AllowFragments)

      Print(self.json)

}

   task.resume()