Swift 为值数组画一条路线

Question

您好，我有一个像这样的数组 route = [[latitude,longitude],[latitude,longitude]...]。我应该画一条遵循数组坐标的线。我试过这个功能：

 func addPolylineToMap(locations: [CLLocation]){
    var coordinates = locations.map({ (location: CLLocation!) -> CLLocationCoordinate2D in
        return location.coordinate})
    var countLocations = locations.count
    let geodesic = MKGeodesicPolyline(coordinates: &coordinates, count: locations.count)
    mapView.addOverlay(geodesic)
}

并调用给它数组路由的函数：

addPolylineToMap(locations: route as! [CLLocation])

但编译器给我错误 ambiguous use of 'init(coordinates:count:)'

无论如何，我不太确定它是否可行。有人可以向我解释如何做得更好吗？

P.S.

路线

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

    let userLocation: CLLocation = locations[0] as CLLocation

    manager.startUpdatingLocation()
    var userLatitude = (userLocation.coordinate.latitude)
    var userLongitude = (userLocation.coordinate.longitude)
    userMoves = [(userLatitude),(userLongitude)]

route 是附加用户移动而创建的数组

Answer 1

您可以删除那个 &。在 Swift 3:

func addPolylineToMap(locations: [CLLocation]) {
    let coordinates = locations.map { [=10=].coordinate }
    let geodesic = MKGeodesicPolyline(coordinates: coordinates, count: coordinates.count)
    mapView.add(geodesic)
}

或在Swift 2:

func addPolylineToMap(locations: [CLLocation]) {
    let coordinates = locations.map { [=11=].coordinate }
    let geodesic = MKGeodesicPolyline(coordinates: coordinates, count: coordinates.count)
    mapView.addOverlay(geodesic)
}

Swift 为值数组画一条路线

Swift Draw a route for an array of value

arrays

swift

mapkit

overlay

polyline