ios - Get Walking Directions to Location -

i'm trying incorporate feature in app give user walking directions location via mapkit. i've seen on maps app don't know how myself. got directions car stumped on how walking. have far:

   func getdirections(){          let request = mkdirectionsrequest()         request.source = mkmapitem.mapitemforcurrentlocation()           request.destination = destination         request.requestsalternateroutes = false          let directions = mkdirections(request: request)           directions.calculatedirectionswithcompletionhandler { (response, error) in              if error != nil {                  print("error \(error)")               } else {                   //self.displayrout(response)                  var overlays = self.mapview.overlays                 self.mapview.removeoverlays(overlays)                  route in response!.routes as! [mkroute] {                      self.mapview.addoverlay(route.polyline,                         level: mkoverlaylevel.aboveroads)                      var instructionnumber = 0                     next  in route.steps {                         instructionnumber += 1                         print(next.instructions)                     }                  }               }          } 

also don't want have open maps app up. need find route inside app.

mkdirectionsrequest has transporttype property. add right after create transport request:

let request = mkdirectionsrequest() request.transporttype = .walking 

(i've never tried walking directions before, found in xcode docs in less 30 seconds. learn way around xcode "documentation , api reference" in menu. contains wealth of information.)