ios 如何在 Swift 中使用 MapKit 在两个位置之间绘制路线？
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How to draw a route between two locations using MapKit in Swift?
提问by Rawan
How can I draw a route between user's current location to a specific locationusing MapKit in Swift?
如何在 Swift 中使用 MapKit绘制用户当前位置到特定位置之间的路线？
I searched a lot, but didn't find any helpful Swift-specific links or tutorials.
我搜索了很多，但没有找到任何有用的 Swift 特定链接或教程。
回答by Abdelrahman Mohamed
Swift 4
斯威夫特 4
class MapController: UIViewController, MKMapViewDelegate {
// MARK: - showRouteOnMap
func showRouteOnMap(pickupCoordinate: CLLocationCoordinate2D, destinationCoordinate: CLLocationCoordinate2D) {
let sourcePlacemark = MKPlacemark(coordinate: pickupCoordinate, addressDictionary: nil)
let destinationPlacemark = MKPlacemark(coordinate: destinationCoordinate, addressDictionary: nil)
let sourceMapItem = MKMapItem(placemark: sourcePlacemark)
let destinationMapItem = MKMapItem(placemark: destinationPlacemark)
let sourceAnnotation = MKPointAnnotation()
if let location = sourcePlacemark.location {
sourceAnnotation.coordinate = location.coordinate
}
let destinationAnnotation = MKPointAnnotation()
if let location = destinationPlacemark.location {
destinationAnnotation.coordinate = location.coordinate
}
self.mapView.showAnnotations([sourceAnnotation,destinationAnnotation], animated: true )
let directionRequest = MKDirectionsRequest()
directionRequest.source = sourceMapItem
directionRequest.destination = destinationMapItem
directionRequest.transportType = .automobile
// Calculate the direction
let directions = MKDirections(request: directionRequest)
directions.calculate {
(response, error) -> Void in
guard let response = response else {
if let error = error {
print("Error: \(error)")
}
return
}
let route = response.routes[0]
self.mapView.add((route.polyline), level: MKOverlayLevel.aboveRoads)
let rect = route.polyline.boundingMapRect
self.mapView.setRegion(MKCoordinateRegionForMapRect(rect), animated: true)
}
}
// MARK: - MKMapViewDelegate
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
let renderer = MKPolylineRenderer(overlay: overlay)
renderer.strokeColor = UIColor(red: 17.0/255.0, green: 147.0/255.0, blue: 255.0/255.0, alpha: 1)
renderer.lineWidth = 5.0
return renderer
}
回答by sagits
class MapController: UIViewController, MKMapViewDelegate {
func showRouteOnMap() {
let request = MKDirectionsRequest()
request.source = MKMapItem(placemark: MKPlacemark(coordinate: annotation1.coordinate, addressDictionary: nil))
request.destination = MKMapItem(placemark: MKPlacemark(coordinate: annotation2.coordinate, addressDictionary: nil))
request.requestsAlternateRoutes = true
request.transportType = .Automobile
let directions = MKDirections(request: request)
directions.calculateDirectionsWithCompletionHandler { [unowned self] response, error in
guard let unwrappedResponse = response else { return }
if (unwrappedResponse.routes.count > 0) {
self.mapView.addOverlay(unwrappedResponse.routes[0].polyline)
self.mapView.setVisibleMapRect(unwrappedResponse.routes[0].polyline.boundingMapRect, animated: true)
}
}
}
func mapView(mapView: MKMapView!, rendererForOverlay overlay: MKOverlay!) -> MKOverlayRenderer! {
if overlay is MKPolyline {
var polylineRenderer = MKPolylineRenderer(overlay: overlay)
polylineRenderer.strokeColor = UIColor.blueColor()
polylineRenderer.lineWidth = 5
return polylineRenderer
}
return nil
}
The return is an array of possible routes, usually we just want to show the first. The annotations are the map annotations.
返回的是一组可能的路由，通常我们只想显示第一个。注释是地图注释。
