swift - sendAsynchronousRequest was deprecated in iOS 9, How to alter code to fix -

below code getting issue with:

func parsefeedforrequest(request: nsurlrequest, callback: (feed: rssfeed?, error: nserror?) -> void) {     nsurlconnection.sendasynchronousrequest(request, queue: nsoperationqueue.mainqueue()) { (response, data, error) -> void in          if ((error) != nil)         {             callback(feed: nil, error: error)         }         else         {             self.callbackclosure = callback              let parser : nsxmlparser = nsxmlparser(data: data!)             parser.delegate = self             parser.shouldresolveexternalentities = false             parser.parse()         }     } } 

this deprecated of ios 9, , telling me use datataskwithrequest instead. can me change sendasync datatask, don't know how to.

use nsurlsession instead below,

for objective-c

nsurlsession *session = [nsurlsession sharedsession]; [[session datataskwithurl:[nsurl urlwithstring:"your url"]           completionhandler:^(nsdata *data,                               nsurlresponse *response,                               nserror *error) {             // handle response    }] resume]; 

for swift,

    var request = nsmutableurlrequest(url: nsurl(string: "your url")!)     var session = nsurlsession.sharedsession()     request.httpmethod = "post"      var params = ["username":"username", "password":"password"] dictionary<string, string>      request.httpbody = try? nsjsonserialization.datawithjsonobject(params, options: [])      request.addvalue("application/json", forhttpheaderfield: "content-type")     request.addvalue("application/json", forhttpheaderfield: "accept")      var task = session.datataskwithrequest(request, completionhandler: {data, response, error -> void in         print("response: \(response)")})      task.resume() 

for asynchronously query, apple docs

like networking apis, nsurlsession api highly asynchronous. returns data in 1 of 2 ways, depending on methods call:

to completion handler block returns data app when transfer finishes or error.

by calling methods on custom delegate data received.

by calling methods on custom delegate when download file complete.