在 swift 中将多条折线渲染到一张地图中
Render multipolylines onto one map in swift
我想尝试使用多段线将几个不同的步行区域放到地图上。该应用程序非常适合一个应用程序,但是当我尝试添加步行区 2 时,区域点 2 之间根本没有显示折线。我怎样才能让它显示区域 1 和区域 2 的折线?
我似乎无法弄清楚我哪里出了问题,因为它非常适合步行区一,但当我添加额外的区域时却不行。
import UIKit
import MapKit
class customPin: NSObject, MKAnnotation {
var coordinate: CLLocationCoordinate2D
var title: String?
var subtitle: String?
init(pinTitle:String, pinSubTitle:String, location:CLLocationCoordinate2D) {
self.title = pinTitle
self.subtitle = pinSubTitle
self.coordinate = location
}
}
class ViewController: UIViewController, MKMapViewDelegate {
@IBOutlet weak var mapView: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//co-ordinates
let zone1S = CLLocationCoordinate2D(latitude: 52.100525, longitude: -9.623071)
let zone1E = CLLocationCoordinate2D(latitude: 52.07241, longitude: -9.575299)
let zone2S = CLLocationCoordinate2D(latitude: 52.054161, longitude: -9.385031)
let zone2E = CLLocationCoordinate2D(latitude: 52.081185, longitude: -9.247033)
//pins
let zone1PinS = customPin(pinTitle: "Zone 1 Start", pinSubTitle: "", location: zone1S)
let zone1PinE = customPin(pinTitle: "Zone 1 End", pinSubTitle: "", location: zone1E)
self.mapView.addAnnotation(zone1PinS)
self.mapView.addAnnotation(zone1PinE)
let zone2PinS = customPin(pinTitle: "Zone 2 Start", pinSubTitle: "", location: zone2S)
let zone2PinE = customPin(pinTitle: "Zone 2 End", pinSubTitle: "", location: zone2E)
self.mapView.addAnnotation(zone2PinS)
self.mapView.addAnnotation(zone2PinE)
let zone1PlacemarkS = MKPlacemark(coordinate: zone1S)
let zone1PlacemarkE = MKPlacemark(coordinate: zone1E)
let zone2PlacemarkS = MKPlacemark(coordinate: zone2S)
let zone2PlacemarkE = MKPlacemark(coordinate: zone2E)
let directionRequest = MKDirections.Request()
directionRequest.source = MKMapItem(placemark: zone1PlacemarkS)
directionRequest.destination = MKMapItem(placemark: zone1PlacemarkE)
//type of commute
directionRequest.transportType = .automobile
let directions = MKDirections(request: directionRequest)
directions.calculate { (response, error) in
guard let directionResonse = response else {
if let error = error {
print("we have error getting directions==\(error.localizedDescription)")
}
return
}
let route = directionResonse.routes[0]
self.mapView.addOverlay(route.polyline, level: .aboveRoads)
let rect = route.polyline.boundingMapRect
//zooming in on location
// self.mapView.setRegion(MKCoordinateRegion(rect), animated: true)
}
//set delegate for mapview
self.mapView.delegate = self
}
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
let renderer = MKPolylineRenderer(overlay: overlay)
renderer.strokeColor = UIColor.red
renderer.lineWidth = 5.0
return renderer
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
when i try and add walking zone 2
但是你不添加它。你是说
let directionRequest = MKDirections.Request()
directionRequest.source = MKMapItem(placemark: zone1PlacemarkS)
directionRequest.destination = MKMapItem(placemark: zone1PlacemarkE)
您只有一个路线请求,它使用 zone1PlacemarkS
和 zone1PlacemarkE
,所以这些是您获得的路线。您永远不会为两个 zone2
地标发出方向请求;你只是把它们扔掉,不用。 (事实上 ,我希望编译器会就此警告您。)
我想尝试使用多段线将几个不同的步行区域放到地图上。该应用程序非常适合一个应用程序,但是当我尝试添加步行区 2 时,区域点 2 之间根本没有显示折线。我怎样才能让它显示区域 1 和区域 2 的折线?
我似乎无法弄清楚我哪里出了问题,因为它非常适合步行区一,但当我添加额外的区域时却不行。
import UIKit
import MapKit
class customPin: NSObject, MKAnnotation {
var coordinate: CLLocationCoordinate2D
var title: String?
var subtitle: String?
init(pinTitle:String, pinSubTitle:String, location:CLLocationCoordinate2D) {
self.title = pinTitle
self.subtitle = pinSubTitle
self.coordinate = location
}
}
class ViewController: UIViewController, MKMapViewDelegate {
@IBOutlet weak var mapView: MKMapView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//co-ordinates
let zone1S = CLLocationCoordinate2D(latitude: 52.100525, longitude: -9.623071)
let zone1E = CLLocationCoordinate2D(latitude: 52.07241, longitude: -9.575299)
let zone2S = CLLocationCoordinate2D(latitude: 52.054161, longitude: -9.385031)
let zone2E = CLLocationCoordinate2D(latitude: 52.081185, longitude: -9.247033)
//pins
let zone1PinS = customPin(pinTitle: "Zone 1 Start", pinSubTitle: "", location: zone1S)
let zone1PinE = customPin(pinTitle: "Zone 1 End", pinSubTitle: "", location: zone1E)
self.mapView.addAnnotation(zone1PinS)
self.mapView.addAnnotation(zone1PinE)
let zone2PinS = customPin(pinTitle: "Zone 2 Start", pinSubTitle: "", location: zone2S)
let zone2PinE = customPin(pinTitle: "Zone 2 End", pinSubTitle: "", location: zone2E)
self.mapView.addAnnotation(zone2PinS)
self.mapView.addAnnotation(zone2PinE)
let zone1PlacemarkS = MKPlacemark(coordinate: zone1S)
let zone1PlacemarkE = MKPlacemark(coordinate: zone1E)
let zone2PlacemarkS = MKPlacemark(coordinate: zone2S)
let zone2PlacemarkE = MKPlacemark(coordinate: zone2E)
let directionRequest = MKDirections.Request()
directionRequest.source = MKMapItem(placemark: zone1PlacemarkS)
directionRequest.destination = MKMapItem(placemark: zone1PlacemarkE)
//type of commute
directionRequest.transportType = .automobile
let directions = MKDirections(request: directionRequest)
directions.calculate { (response, error) in
guard let directionResonse = response else {
if let error = error {
print("we have error getting directions==\(error.localizedDescription)")
}
return
}
let route = directionResonse.routes[0]
self.mapView.addOverlay(route.polyline, level: .aboveRoads)
let rect = route.polyline.boundingMapRect
//zooming in on location
// self.mapView.setRegion(MKCoordinateRegion(rect), animated: true)
}
//set delegate for mapview
self.mapView.delegate = self
}
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
let renderer = MKPolylineRenderer(overlay: overlay)
renderer.strokeColor = UIColor.red
renderer.lineWidth = 5.0
return renderer
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
when i try and add walking zone 2
但是你不添加它。你是说
let directionRequest = MKDirections.Request()
directionRequest.source = MKMapItem(placemark: zone1PlacemarkS)
directionRequest.destination = MKMapItem(placemark: zone1PlacemarkE)
您只有一个路线请求,它使用 zone1PlacemarkS
和 zone1PlacemarkE
,所以这些是您获得的路线。您永远不会为两个 zone2
地标发出方向请求;你只是把它们扔掉,不用。 (事实上 ,我希望编译器会就此警告您。)