我尝试向 map 添加折线，但它不可见。
locationManager.startUpdatingLocation()
guard let locValue: CLLocationCoordinate2D =
locationManager.location?.coordinate else { return }
Map.setCenter(locValue, animated: true)
if !locations.contains(where: {$0.latitude == locValue.latitude && $0.longitude == locValue.longitude}) {
locations.append(locValue)
NSLog("Add: %f %f -> Count: %i", locValue.latitude, locValue.longitude, locations.count)
let polyline = MKPolyline(coordinates: &locations, count: locations.count)
Map.addOverlay(mapView(Map, rendererFor: polyline).overlay)
}
“我的” map View 功能:
func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {
let polyLine = overlay
let polyLineRenderer = MKPolylineRenderer(overlay: polyLine)
polyLineRenderer.strokeColor = UIColor.red
polyLineRenderer.lineWidth = 5.0
return polyLineRenderer
}
最佳答案
你可以试试
self.map.delegate = self
let polyline = MKPolyline(coordinates:locations, count: locations.count)
self.map.addOverlay(routeLine)
关于ios - map 上的折线不可见，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53912695/