我正在开发iOS应用程序。在该应用程序中，我有两个字段From和To。我使用Google Auto Complete API输入地址。此外，我还能够获得2个地方的纬度和经度，并能够在GMSMapView上显示标记
现在我想在这两个地方之间画路线。我们在使用MKMapView时找到了解决方案。但我无法找到GMSMapView的解决方案。请帮助我在GMSMapView中绘制这两点之间的路线。
如果可能的话，请给我一些重要的链接。
感谢。
答案 0 :(得分：33)
`first get all points coordinates which are coming in route then add these points latitude and longitude in path in will draw path according to that`
GMSCameraPosition *cameraPosition=[GMSCameraPosition cameraWithLatitude:18.5203 longitude:73.8567 zoom:12];
_mapView =[GMSMapView mapWithFrame:CGRectZero camera:cameraPosition];
_mapView.myLocationEnabled=YES;
GMSMarker *marker=[[GMSMarker alloc]init];
marker.position=CLLocationCoordinate2DMake(18.5203, 73.8567);
marker.icon=[UIImage imageNamed:@"aaa.png"] ;
marker.groundAnchor=CGPointMake(0.5,0.5);
marker.map=_mapView;
GMSMutablePath *path = [GMSMutablePath path];
[path addCoordinate:CLLocationCoordinate2DMake(@(18.520).doubleValue,@(73.856).doubleValue)];
[path addCoordinate:CLLocationCoordinate2DMake(@(16.7).doubleValue,@(73.8567).doubleValue)];
GMSPolyline *rectangle = [GMSPolyline polylineWithPath:path];
rectangle.strokeWidth = 2.f;
rectangle.map = _mapView;
self.view=_mapView;
答案 1 :(得分：28)
我已经编写了以下代码，可以为您解决问题：
- (void)drawRoute
{
[self fetchPolylineWithOrigin:myOrigin destination:myDestination completionHandler:^(GMSPolyline *polyline)
{
if(polyline)
polyline.map = self.myMap;
}];
}
- (void)fetchPolylineWithOrigin:(CLLocation *)origin destination:(CLLocation *)destination completionHandler:(void (^)(GMSPolyline *))completionHandler
{
NSString *originString = [NSString stringWithFormat:@"%f,%f", origin.coordinate.latitude, origin.coordinate.longitude];
NSString *destinationString = [NSString stringWithFormat:@"%f,%f", destination.coordinate.latitude, destination.coordinate.longitude];
NSString *directionsAPI = @"https://maps.googleapis.com/maps/api/directions/json?";
NSString *directionsUrlString = [NSString stringWithFormat:@"%@&origin=%@&destination=%@&mode=driving", directionsAPI, originString, destinationString];
NSURL *directionsUrl = [NSURL URLWithString:directionsUrlString];
NSURLSessionDataTask *fetchDirectionsTask = [[NSURLSession sharedSession] dataTaskWithURL:directionsUrl completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error)
{
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
if(error)
{
if(completionHandler)
completionHandler(nil);
return;
}
NSArray *routesArray = [json objectForKey:@"routes"];
GMSPolyline *polyline = nil;
if ([routesArray count] > 0)
{
NSDictionary *routeDict = [routesArray objectAtIndex:0];
NSDictionary *routeOverviewPolyline = [routeDict objectForKey:@"overview_polyline"];
NSString *points = [routeOverviewPolyline objectForKey:@"points"];
GMSPath *path = [GMSPath pathFromEncodedPath:points];
polyline = [GMSPolyline polylineWithPath:path];
}
// run completionHandler on main thread
dispatch_sync(dispatch_get_main_queue(), ^{
if(completionHandler)
completionHandler(polyline);
});
}];
[fetchDirectionsTask resume];
}
答案 2 :(得分：10)
使用swift 3绘制折线
func getPolylineRoute(from source: CLLocationCoordinate2D, to destination: CLLocationCoordinate2D){
let config = URLSessionConfiguration.default
let session = URLSession(configuration: config)
let url = URL(string: "https://maps.googleapis.com/maps/api/directions/json?origin=\(source.latitude),\(source.longitude)&destination=\(destination.latitude),\(destination.longitude)&sensor=true&mode=driving&key=YOURKEY")!
let task = session.dataTask(with: url, completionHandler: {
(data, response, error) in
if error != nil {
print(error!.localizedDescription)
self.activityIndicator.stopAnimating()
}
else {
do {
if let json : [String:Any] = try JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? [String: Any]{
guard let routes = json["routes"] as? NSArray else {
DispatchQueue.main.async {
self.activityIndicator.stopAnimating()
}
return
}
if (routes.count > 0) {
let overview_polyline = routes[0] as? NSDictionary
let dictPolyline = overview_polyline?["overview_polyline"] as? NSDictionary
let points = dictPolyline?.object(forKey: "points") as? String
self.showPath(polyStr: points!)
DispatchQueue.main.async {
self.activityIndicator.stopAnimating()
let bounds = GMSCoordinateBounds(coordinate: source, coordinate: destination)
let update = GMSCameraUpdate.fit(bounds, with: UIEdgeInsetsMake(170, 30, 30, 30))
self.mapView!.moveCamera(update)
}
}
else {
DispatchQueue.main.async {
self.activityIndicator.stopAnimating()
}
}
}
}
catch {
print("error in JSONSerialization")
DispatchQueue.main.async {
self.activityIndicator.stopAnimating()
}
}
}
})
task.resume()
}
func showPath(polyStr :String){
let path = GMSPath(fromEncodedPath: polyStr)
let polyline = GMSPolyline(path: path)
polyline.strokeWidth = 3.0
polyline.strokeColor = UIColor.red
polyline.map = mapView // Your map view
}
注意：您需要在网址中添加googleDirection API密钥。
答案 3 :(得分：8)
如果有人在为@Tarek的答案寻找 Swift 3.0 ，你可以使用它。这也使用Alamofire和SwiftyJSON。
string[] particulars = particular.split(',');
for(int i=0; i < particulars.Length; i++)
{
// here you could make a database call to insert row into the database
}
答案 4 :(得分：4)
这是johny kumar的答案的快速翻译。
let cameraPositionCoordinates = CLLocationCoordinate2D(latitude: 18.5203, longitude: 73.8567)
let cameraPosition = GMSCameraPosition.cameraWithTarget(cameraPositionCoordinates, zoom: 12)
let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: cameraPosition)
mapView.myLocationEnabled = true
let marker = GMSMarker()
marker.position = CLLocationCoordinate2DMake(18.5203, 73.8567)
marker.groundAnchor = CGPointMake(0.5, 0.5)
marker.map = mapView
let path = GMSMutablePath()
path.addCoordinate(CLLocationCoordinate2DMake(18.520, 73.856))
path.addCoordinate(CLLocationCoordinate2DMake(16.7, 73.8567))
let rectangle = GMSPolyline(path: path)
rectangle.strokeWidth = 2.0
rectangle.map = mapView
self.view = mapView
答案 5 :(得分：3)
- Swift 3.0＆amp; XCode 8.0 Staright Line :(
let cameraPosition = GMSCameraPosition.camera(withLatitude: 18.5203, longitude: 73.8567, zoom: 12)
self.mapView = GMSMapView.map(withFrame: CGRect.zero, camera: cameraPosition)
self.mapView.isMyLocationEnabled = true
let marker = GMSMarker()
marker.position = CLLocationCoordinate2DMake(18.5203, 73.8567)
// marker.icon = UIImage(named: "aaa.png")!
marker.groundAnchor = CGPoint(x: 0.5, y: 0.5)
marker.map = mapView
let path = GMSMutablePath()
path.add(CLLocationCoordinate2DMake(CDouble((18.520)), CDouble((73.856))))
path.add(CLLocationCoordinate2DMake(CDouble((16.7)), CDouble((73.8567))))
let rectangle = GMSPolyline.init(path: path)
rectangle.strokeWidth = 2.0
rectangle.map = mapView
self.view = mapView
答案 6 :(得分：2)
向Google Directions API发出网址请求，当您收到JSON文件时，请完成所有步骤并解码点对象。
答案 7 :(得分：2)
我在xCode 8.3.3和Swift 3.1中使用了AlamoFire和SwiftyJson。 将路径的绘图放在仅需要两个参数的函数中
字符串原点示例“48.7788,9.22222” 和一个字符串目标示例“49.3212232,8.334151”
func drawPath (origin: String, destination: String) {
/* set the parameters needed */
String prefTravel = "walking" /* options are driving, walking, bicycling */
String gmapKey = "Ask Google"
/* Make the url */
let url = URL(string: "https://maps.googleapis.com/maps/api/directions/json?origin=\(origin)&destination=\(destination)&mode=\(prefTravel)&key=" + gmapKey)
/* Fire the request */
Alamofire.request(url!).responseJSON{(responseData) -> Void in
if((responseData.result.value) != nil) {
/* read the result value */
let swiftyJsonVar = JSON(responseData.result.value!)
/* only get the routes object */
if let resData = swiftyJsonVar["routes"].arrayObject {
let routes = resData as! [[String: AnyObject]]
/* loop the routes */
if routes.count > 0 {
for rts in routes {
/* get the point */
let overViewPolyLine = rts["overview_polyline"]?["points"]
let path = GMSMutablePath(fromEncodedPath: overViewPolyLine as! String)
/* set up poly line */
let polyline = GMSPolyline.init(path: path)
polyline.strokeWidth = 2
polyline.map = self.mapView
}
}
}
}
}
}
答案 8 :(得分：0)
Hi You can use "LRouteController", it is a best way to show road route between two points like :
[_routeController getPolyline With Locations: (Array of first and last location)]
Try it, I hope it will resolve your problem.
答案 9 :(得分：0)
来自 Google Directions API的DirectionResponse NSLogs对于查看您正在使用的内容非常有用。
[[GMDirectionService sharedInstance] getDirectionsFrom:origin to:destination succeeded:^(GMDirection *directionResponse) {
if ([directionResponse statusOK]){
NSLog(@"Duration : %@", [directionResponse durationHumanized]);
NSLog(@"Distance : %@", [directionResponse distanceHumanized]);
NSArray *routes = [[directionResponse directionResponse] objectForKey:@"routes"];
// NSLog(@"Route : %@", [[directionResponse directionResponse] objectForKey:@"routes"]);
GMSPath *path = [GMSPath pathFromEncodedPath:routes[0][@"overview_polyline"] [@"points"]];
GMSPolyline *polyline = [GMSPolyline polylineWithPath:path];
polyline.strokeColor = [UIColor redColor];
polyline.strokeWidth = 5.f;
polyline.map = mapView;
}
} failed:^(NSError *error) {
NSLog(@"Can't reach the server")
}];
答案 10 :(得分：0)
您知道从Google获取路线和路线是免费的，去年Google改变了其api调用价格很多！，因此它可能并不适合所有人。因此，如果您拥有所有关键坐标，并且只想将它们连接在一起，则可以使用以下内容。
使用坐标生成路径：
extension GMSMutablePath {
convenience init(coordinates: [CLLocationCoordinate2D]) {
self.init()
for coordinate in coordinates {
add(coordinate)
}
}
}
添加地图路径：
extension GMSMapView {
func addPath(_ path: GMSPath, strokeColor: UIColor? = nil, strokeWidth: CGFloat? = nil, geodesic: Bool? = nil, spans: [GMSStyleSpan]? = nil) {
let line = GMSPolyline(path: path)
line.strokeColor = strokeColor ?? line.strokeColor
line.strokeWidth = strokeWidth ?? line.strokeWidth
line.geodesic = geodesic ?? line.geodesic
line.spans = spans ?? line.spans
line.map = self
}
}
用法：
let path = GMSMutablePath(coordinates: [<#Coordinates#>])
mapView.addPath(path)
答案 11 :(得分：0)
迅速5 对我来说很好
View will appear
self.drawMap(SourceCordinate: CLLocationCoordinate2D(latitude: lat, longitude: long), destinationcordinate: CLLocationCoordinate2D(latitude: latitude, longitude: longitude))
func drawMap(SourceCordinate : CLLocationCoordinate2D, destinationcordinate :CLLocationCoordinate2D)
{
self.mapView.clear()
let str = String(format:"https://maps.googleapis.com/maps/api/directions/json?origin=\(SourceCordinate.latitude),\(SourceCordinate.longitude)&destination=\(destinationcordinate.latitude),\(destinationcordinate.longitude)&key=\(googleServiceKey)")
print(str)
Alamofire.request(str).responseJSON { (responseObject) -> Void in
let resJson = JSON(responseObject.result.value!)
print(resJson)
let routes : NSArray = resJson["routes"].rawValue as! NSArray
if(resJson["status"].rawString()! == "ZERO_RESULTS"){}
else if(resJson["status"].rawString()! == "NOT_FOUND"){}
else if routes.count == 0{}
else{
let routes : NSArray = resJson["routes"].rawValue as! NSArray
// let position = CLLocationCoordinate2D(latitude: SourceCordinate.latitude, longitude: SourceCordinate.longitude)
let markerEnd = GMSMarker()
markerEnd.position = CLLocationCoordinate2D(latitude: self.latitude, longitude: self.longitude)
markerEnd.map = self.mapView
let pathv : NSArray = routes.value(forKey: "overview_polyline") as! NSArray
let paths : NSArray = pathv.value(forKey: "points") as! NSArray
let newPath = GMSPath.init(fromEncodedPath: paths[0] as! String)
let polyLine = GMSPolyline(path: newPath)
polyLine.strokeWidth = 5
polyLine.strokeColor = .black
let ThemeOrange = GMSStrokeStyle.solidColor( .blue)
let OrangeToBlue = GMSStrokeStyle.gradient(from: .blue, to: .blue)
polyLine.spans = [GMSStyleSpan(style: ThemeOrange),
GMSStyleSpan(style: ThemeOrange),
GMSStyleSpan(style: OrangeToBlue)]
polyLine.map = self.mapView
}
}
}