maps - Swift MapKit not showing directions to pin -


i have written code drop pin , show directions on mapkitview , reason pin drops directions not show on map. welcome, thank you.

import uikit import mapkit import corelocation  class viewcontroller: uiviewcontroller, cllocationmanagerdelegate, mkmapviewdelegate {      @iboutlet weak var mapview: mkmapview!      let locationmanager = cllocationmanager()     var movedtouserlocation = false      func clean() {         mapview.removeannotations(mapview.annotations)         mapview.removeoverlays(mapview.overlays)     }      func locationmanager(_ manager: cllocationmanager, didchangeauthorization status: clauthorizationstatus) {         switch status {         case .denied, .restricted:             print("disable parental controles")         case .notdetermined:             manager.requestwheninuseauthorization()         default:             manager.startupdatinglocation()         }     }      func mapview(_ mapview: mkmapview, didupdate userlocation: mkuserlocation) {         if !movedtouserlocation {             mapview.region.center = mapview.userlocation.coordinate             movedtouserlocation = true         }     }       func adddirections(coor: cllocationcoordinate2d) {         let directionsrequest = mkdirectionsrequest()         directionsrequest.source = mkmapitem(placemark: mkplacemark(coordinate: mapview.userlocation.coordinate))         directionsrequest.destination = mkmapitem(placemark: mkplacemark(coordinate: coor))         directionsrequest.requestsalternateroutes = false         directionsrequest.transporttype = .any          let directions = mkdirections(request: directionsrequest)         directions.calculate { response, error in             if let res = response {                 if let route = res.routes.first {                     self.mapview.add(route.polyline)                     self.mapview.region.center = coor                 }             }             else {                 print(error)             }         }     }      @ibaction func b1(_ sender: any) {         let lat = 30.2817         let lon = -86.0188          self.clean()          let coord = cllocationcoordinate2dmake(cllocationdegrees(lat), cllocationdegrees(lon))         let annotationview: mkpinannotationview!         let annotationpoint = mkpointannotation()          annotationpoint.coordinate = coord         annotationpoint.title = "pizza sea"          annotationview = mkpinannotationview(annotation: annotationpoint, reuseidentifier: "annotation")         mapview.addannotation(annotationview.annotation!)         adddirections(coor: coord)     }       @ibaction func b2(_ sender: any) {         let lat = 30.2844         let lon = -86.0272          self.clean()          let coord = cllocationcoordinate2dmake(cllocationdegrees(lat), cllocationdegrees(lon))         let annotationview: mkpinannotationview!         let annotationpoint = mkpointannotation()          annotationpoint.coordinate = coord         annotationpoint.title = "george's"          annotationview = mkpinannotationview(annotation: annotationpoint, reuseidentifier: "annotation")         mapview.addannotation(annotationview.annotation!)         adddirections(coor: coord)     }      @ibaction func b3(_ sender: any) {         let lat = 30.2815         let lon = -86.0191          self.clean()          let coord = cllocationcoordinate2dmake(cllocationdegrees(lat), cllocationdegrees(lon))         let annotationview: mkpinannotationview!         let annotationpoint = mkpointannotation()          annotationpoint.coordinate = coord         annotationpoint.title = "ticheli's pizza"          annotationview = mkpinannotationview(annotation: annotationpoint, reuseidentifier: "annotation")         mapview.addannotation(annotationview.annotation!)         adddirections(coor: coord)     }      @ibaction func b4(_ sender: any) {         let lat = 30.2794074         let lon = -86.0816672          self.clean()          let coord = cllocationcoordinate2dmake(cllocationdegrees(lat), cllocationdegrees(lon))         let annotationview: mkpinannotationview!         let annotationpoint = mkpointannotation()          annotationpoint.coordinate = coord         annotationpoint.title = "big bad breakfast"          annotationview = mkpinannotationview(annotation: annotationpoint, reuseidentifier: "annotation")         mapview.addannotation(annotationview.annotation!)         adddirections(coor: coord)     }      @ibaction func b5(_ sender: any) {         let lat = 30.3129063         let lon = -86.1119704          self.clean()          let coord = cllocationcoordinate2dmake(cllocationdegrees(lat), cllocationdegrees(lon))         let annotationview: mkpinannotationview!         let annotationpoint = mkpointannotation()          annotationpoint.coordinate = coord         annotationpoint.title = "cafe thirty-a"          annotationview = mkpinannotationview(annotation: annotationpoint, reuseidentifier: "annotation")         mapview.addannotation(annotationview.annotation!)         adddirections(coor: coord)     }      func mapview(_ mapview: mkmapview, rendererfor overlay: mkoverlay) -> mkpolylinerenderer {         let renderer = mkpolylinerenderer(overlay: overlay as! mkpolyline)          renderer.strokecolor = .yellow         renderer.linewidth = 5.0          return renderer     }      @objc func dropannotation(gesturerecogniser: uigesturerecognizer) {         if gesturerecogniser.state == .began {             let holdlocation = gesturerecogniser.location(in: mapview)             let coord = mapview.convert(holdlocation, tocoordinatefrom: mapview)              let annotationview: mkpinannotationview!             let annotationpoint = mkpointannotation()              self.clean()              annotationpoint.coordinate = coord             annotationpoint.title = "\(coord.latitude), \(coord.longitude)"              annotationview = mkpinannotationview(annotation: annotationpoint, reuseidentifier: "annotation 2")             mapview.addannotation(annotationview.annotation!)             adddirections(coor: coord)         }     }      override func viewdidload() {         super.viewdidload()          mapview.delegate = self         locationmanager.delegate = self          locationmanager.desiredaccuracy = kcllocationaccuracybest          let span = mkcoordinatespan(latitudedelta: mapview.region.span.latitudedelta/200, longitudedelta: mapview.region.span.longitudedelta/200)         let region = mkcoordinateregion(center: mapview.region.center, span: span)          let droppin = uilongpressgesturerecognizer(target: self, action: #selector(self.dropannotation(gesturerecogniser:)))         droppin.minimumpressduration = cftimeinterval(1.0)         mapview.addgesturerecognizer(droppin)          mapview.setregion(region, animated: true)     }      override func didreceivememorywarning() {         super.didreceivememorywarning()         // dispose of resources can recreated.     } }

maybe mapview.userlocation.coordinate nil.

check "user location" of mapview on storyboard.

enter image description here


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