arrays - Swift 为值数组绘制路线

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])

但是编译器给我错误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？

附言

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 是一个附加用户移动的数组

Answer 1

您可以删除那个&。在 Swift 3 中:

func addPolylineToMap(locations: [CLLocation]) {
    let coordinates = locations.map { $0.coordinate }
    let geodesic = MKGeodesicPolyline(coordinates: coordinates, count: coordinates.count)
    mapView.add(geodesic)
}

或者在 Swift 2 中:

func addPolylineToMap(locations: [CLLocation]) {
    let coordinates = locations.map { $0.coordinate }
    let geodesic = MKGeodesicPolyline(coordinates: coordinates, count: coordinates.count)
    mapView.addOverlay(geodesic)
}