我正试图在我的应用程序中创建一个函数，该函数将引导用户找到我创建的标记。这是我正在使用的代码，它工作得很好，它可以获取用户的当前位置并将其显示在地图上。但是我怎样才能找到指向标记的方向呢？
任何awnser都会对有所帮助
class Karta: UIViewController, CLLocationManagerDelegate {
@IBOutlet var mapView: GMSMapView!
let locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
//allow app to track user
locationManager.delegate = self
locationManager.requestWhenInUseAuthorization()
//set out a marker on the map
var marker = GMSMarker()
marker.position = CLLocationCoordinate2DMake(56.675907, 12.858798)
marker.appearAnimation = kGMSMarkerAnimationPop
marker.icon = UIImage(named: "flag_icon")
marker.map = mapView
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "Types Segue" {
let navigationController = segue.destinationViewController as UINavigationController
}
}
func locationManager(manager: CLLocationManager!, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
//If map is being used
if status == .AuthorizedWhenInUse {
var myLocation = mapView
locationManager.startUpdatingLocation()
mapView.myLocationEnabled = true
mapView.settings.myLocationButton = true
}
}
func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {
if let location = locations.first as? CLLocation {
mapView.camera = GMSCameraPosition(target: location.coordinate, zoom: 15, bearing: 0, viewingAngle: 0)
locationManager.stopUpdatingLocation()
}
}
}
所以我最近刚刚解决了这个问题，这是我使用最新版本的Alamofire（4.3）实现的Swift 3
func fetchMapData() {
let directionURL = "https://maps.googleapis.com/maps/api/directions/json?" +
"origin=(originAddressLat),(originAddressLng)&destination=(destinationAddressLat),(destinationAddressLong)&" +
"key=YOUROWNSERVERKEY"
Alamofire.request(directionURL).responseJSON
{ response in
if let JSON = response.result.value {
let mapResponse: [String: AnyObject] = JSON as! [String : AnyObject]
let routesArray = (mapResponse["routes"] as? Array) ?? []
let routes = (routesArray.first as? Dictionary<String, AnyObject>) ?? [:]
let overviewPolyline = (routes["overview_polyline"] as? Dictionary<String,AnyObject>) ?? [:]
let polypoints = (overviewPolyline["points"] as? String) ?? ""
let line = polypoints
self.addPolyLine(encodedString: line)
}
}
}
func addPolyLine(encodedString: String) {
let path = GMSMutablePath(fromEncodedPath: encodedString)
let polyline = GMSPolyline(path: path)
polyline.strokeWidth = 5
polyline.strokeColor = .blue
polyline.map = whateverYourMapViewObjectIsCalled
}
免责声明：Swift 2
func addOverlayToMapView(){
let directionURL = "https://maps.googleapis.com/maps/api/directions/json?origin=(srcLocation.coordinate.latitude),(srcLocation.coordinate.longitude)&destination=(destLocation.coordinate.latitude),(destLocation.coordinate.longitude)&key=Your Server Key"
Alamofire.request(.GET, directionURL, parameters: nil).responseJSON { response in
switch response.result {
case .Success(let data):
let json = JSON(data)
print(json)
let errornum = json["error"]
if (errornum == true){
}else{
let routes = json["routes"].array
if routes != nil{
let overViewPolyLine = routes![0]["overview_polyline"]["points"].string
print(overViewPolyLine)
if overViewPolyLine != nil{
self.addPolyLineWithEncodedStringInMap(overViewPolyLine!)
}
}
}
case .Failure(let error):
print("Request failed with error: (error)")
}
}
}
使用这些点，我们现在使用fromEncodedPath 从两个点创建路径
func addPolyLineWithEncodedStringInMap(encodedString: String) {
let path = GMSMutablePath(fromEncodedPath: encodedString)
let polyLine = GMSPolyline(path: path)
polyLine.strokeWidth = 5
polyLine.strokeColor = UIColor.yellowColor()
polyLine.map = mapView
}
与苹果的MapKit不同，iOS版谷歌地图SDK本机不包含执行路线计算的方法。
相反，您需要使用Google Directions API：https://developers.google.com/maps/documentation/directions/.这是一个基于HTTP-only的API，Google目前还没有提供任何SDK，但您可以轻松地自己编写包装，也可以从Github上的众多选项中选择一个：
- https://github.com/sudeepjaiswal/GoogleDirections
- https://github.com/sebk/GoogleDirections
- https://github.com/iamamused/iOS-DirectionKit
- https://github.com/marciniwanicki/OCGoogleDirectionsAPI
- 以及许多其他
它非常简单如果你在iOS项目中添加了谷歌地图SDK，如果你想实现两个不同方向之间的谷歌地图方向线，我已经用swift 2.3以简单的方式制作了演示代码，请尝试、修改并使用它。！！！
注意：不要忘记更改您想要的lat-long和API密钥（您可以在Google API Manager凭据部分使用无限制的API密钥）
func callWebService(){
let url = NSURL(string: "https://maps.googleapis.com/maps/api/directions/json?origin=(18.5235),(73.7184)&destination=(18.7603),(73.8630)&key=AIzaSyDxSgGQX6jrn4iq6dyIWAKEOTneZ3Z8PtU")
let request = NSURLRequest(URL: url!)
let config = NSURLSessionConfiguration.defaultSessionConfiguration()
let session = NSURLSession(configuration: config)
let task = session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
// notice that I can omit the types of data, response and error
do{
if let jsonResult = try NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions.MutableContainers) as? NSDictionary {
//print(jsonResult)
let routes = jsonResult.valueForKey("routes")
//print(routes)
let overViewPolyLine = routes![0]["overview_polyline"]!!["points"] as! String
print(overViewPolyLine)
if overViewPolyLine != ""{
//Call on Main Thread
dispatch_async(dispatch_get_main_queue()) {
self.addPolyLineWithEncodedStringInMap(overViewPolyLine)
}
}
}
}
catch{
print("Somthing wrong")
}
});
// do whatever you need with the task e.g. run
task.resume()
}
func addPolyLineWithEncodedStringInMap(encodedString: String) {
let camera = GMSCameraPosition.cameraWithLatitude(18.5204, longitude: 73.8567, zoom: 10.0)
let mapView = GMSMapView.mapWithFrame(CGRect.zero, camera: camera)
mapView.myLocationEnabled = true
let path = GMSMutablePath(fromEncodedPath: encodedString)
let polyLine = GMSPolyline(path: path)
polyLine.strokeWidth = 5
polyLine.strokeColor = UIColor.yellowColor()
polyLine.map = mapView
let smarker = GMSMarker()
smarker.position = CLLocationCoordinate2D(latitude: 18.5235, longitude: 73.7184)
smarker.title = "Lavale"
smarker.snippet = "Maharshtra"
smarker.map = mapView
let dmarker = GMSMarker()
dmarker.position = CLLocationCoordinate2D(latitude: 18.7603, longitude: 73.8630)
dmarker.title = "Chakan"
dmarker.snippet = "Maharshtra"
dmarker.map = mapView
view = mapView
}