ios - Swift Use AlertController to add annotation on mapView -


i'm trying use alert controller textfield create mapview annotation using textfield title. can print constants i've created annotation doesn't work. when use annotation code outside alertaction works fine, can't textfield input. doing wrong? 

override func viewdidload() {     super.viewdidload()      let uilpgr = uilongpressgesturerecognizer(target: self, action: #selector(viewcontroller.longpress(gesturerecognizer:)))     uilpgr.minimumpressduration = 2     map.addgesturerecognizer(uilpgr)  }  func longpress(gesturerecognizer: uigesturerecognizer) {      let alert = uialertcontroller(title: "new place", message: "enter name", preferredstyle: uialertcontrollerstyle.alert)      alert.addtextfield { (textfield: uitextfield) in         textfield.placeholder = "name"     }      let okaction = uialertaction(title: "ok", style: uialertactionstyle.default) { (uialertaction) in          if let tempplace = alert.textfields?[0].text {             let place = tempplace             let touchpoint = gesturerecognizer.location(in: self.map)             let coordinate = self.map.convert(touchpoint, tocoordinatefrom: self.map)             let annotation = mkpointannotation()             let latitude = coordinate.latitude             let longitude = coordinate.longitude              annotation.title = place             annotation.subtitle = "lat " + (string(format: "%.2f", latitude) + " lon " + string(format: "%.2f", longitude))             annotation.coordinate = coordinate             self.map.addannotation(annotation)         }       }      let cancelaction = uialertaction(title: "cancel", style: uialertactionstyle.cancel) { (uialertaction) in      }       alert.addaction(okaction)     alert.addaction(cancelaction)      present(alert, animated: true, completion: nil)  }

just store touch points before uialertcontroller presentation , use in uialteraction because when alert popover/present while longpress cannot able save/get touch point why touch points inside uialteraction 0,0. 

func longpress(gesturerecognizer: uigesturerecognizer) {  let touchpointtemp = gesturerecognizer.location(in: self.map_home)  let alert = uialertcontroller(title: "new place", message: "enter name", preferredstyle: uialertcontrollerstyle.alert)      alert.addtextfield { (textfield: uitextfield) in         textfield.placeholder = "name"     }      let okaction = uialertaction(title: "ok", style: uialertactionstyle.default) { (uialertaction) in          if let tempplace = alert.textfields?[0].text {             let place = tempplace             let touchpoint = touchpointtemp             let coordinate = self.map_home.convert(touchpoint, tocoordinatefrom: self.map_home)              print(coordinate)             let annotation = mkpointannotation()             let latitude = coordinate.latitude             let longitude = coordinate.longitude              annotation.title = place             annotation.subtitle = "lat " + (string(format: "%.2f", latitude) + " lon " + string(format: "%.2f", longitude))             annotation.coordinate = coordinate             self.map_home.addannotation(annotation)         }       }      let cancelaction = uialertaction(title: "cancel", style: uialertactionstyle.cancel) { (uialertaction) in      }       alert.addaction(okaction)     alert.addaction(cancelaction)      present(alert, animated: true, completion: nil)  }

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