ios - NSURLSession gets the data properly, but returns nothing after Task.resume() -

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• returning data async call in swift function 4 answers

i trying connect http server data in json format. connects , gets data properly. able print data before task.resume() but, doesn't print after task.resume() also, function returns empty object.

i tried saving global variable before task.resume(). so, can use getter method data, still returns empty.

can please tell me doing wrong here. in advance

func getticketinfo(rdate: string, rname: string) -> nsdictionary {      var obj = nsdictionary()     let request = nsmutableurlrequest(url: nsurl(string: self.host)!)     request.httpmethod = "post"     let poststring = "&drivername=\(self.username);&password=\(self.password);&function=getticketprintinvoiceinfo;&routename=\(rname);&routedate=\(rdate);";     request.httpbody = poststring.datausingencoding(nsutf8stringencoding)     let task = nsurlsession.sharedsession().datataskwithrequest(request) {         data, response, error in          if error != nil {             print("error=\(error)", terminator: "")             return         }          var parseerror: nserror?         let parsedobject: anyobject?         {             parsedobject = try nsjsonserialization.jsonobjectwithdata(data!,                 options: nsjsonreadingoptions.allowfragments)         } catch let error nserror {             parseerror = error             parsedobject = nil         } catch {             fatalerror()         }          obj = (parsedobject as? nsdictionary)!          //prints object fine         print(obj)       }      task.resume()     //prints empty result     print(obj)     return obj;   } 

because async request. line of code executing outside of block has not gotten results yet. so, won't see anything. if trying debug it. execution order this:

task.resume() //prints empty result print(obj) return obj; 

then, next execution print(obj) inside. of course, come little bit slow if networking not good.