如何使用iOS API将KML文件URL加载到Google Maps？

我在谷歌地图上的视图控制器中嵌入了谷歌地图。 我可以使用以下方法创建地图：

GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:39.93 longitude:-75.17 zoom:12]; mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera]; // use GPS to determine location of self mapView_.myLocationEnabled = YES; mapView_.settings.myLocationButton = YES; mapView_.settings.compassButton = YES; 

现在，我想添加一个显示路径的kml文件（来自URL）。 我想在GMSMapView中有一些东西允许它作为一个层或其他东西，但我没有运气。 我已经看过KMS教程但是它使用了一些其他套件，MK。 无论如何，有没有办法使用Google Maps for iOS API加载KML文件？

Answer 1

我知道这个问题超过1年但我找不到任何解决方案，所以我希望我的解决方案有用。

您可以使用iOS-KML-Framework将KML加载到GMSMapView中。 我已经从使用KML-Viewer的项目中移植了这段代码

添加从给定URL解析KML的方法，确保将正确的应用程序包传递给dispatch_queue_create（）：

 - (void)loadKMLAtURL:(NSURL *)url { dispatch_queue_t loadKmlQueue = dispatch_queue_create("com.example.app.kmlqueue", NULL); dispatch_async(loadKmlQueue, ^{ KMLRoot *newKml = [KMLParser parseKMLAtURL:url]; [self performSelectorOnMainThread:@selector(kmlLoaded:) withObject:newKml waitUntilDone:YES]; }); } 

处理KML解析结果或错误：

 - (void)kmlLoaded:(id)sender { self.navigationController.view.userInteractionEnabled = NO; __kml = sender; // remove KML format error observer [[NSNotificationCenter defaultCenter] removeObserver:self name:kKMLInvalidKMLFormatNotification object:nil]; if (__kml) { __geometries = __kml.geometries; dispatch_async(dispatch_get_main_queue(), ^{ self.navigationController.view.userInteractionEnabled = YES; [self reloadMapView]; }); } else { dispatch_async(dispatch_get_main_queue(), ^{ self.navigationController.view.userInteractionEnabled = YES; UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Error", nil) message:NSLocalizedString(@"Failed to read the KML file", nil) delegate:nil cancelButtonTitle:NSLocalizedString(@"OK", nil) otherButtonTitles:nil]; [alertView show]; }); } } 

从KML中检索几何项并将它们作为标记添加到GMSMapView：

 - (void)reloadMapView { NSMutableArray *annotations = [NSMutableArray array]; for (KMLAbstractGeometry *geometry in __geometries) { MKShape *mkShape = [geometry mapkitShape]; if (mkShape) { if ([mkShape isKindOfClass:[MKPointAnnotation class]]) { MKPointAnnotation *annotation = (MKPointAnnotation*)mkShape; GMSMarker *marker = [[GMSMarker alloc] init]; marker.position = annotation.coordinate; marker.appearAnimation = kGMSMarkerAnimationPop; marker.icon = [UIImage imageNamed:@"marker"]; marker.title = annotation.title; marker.userData = [NSString stringWithFormat:@"%@", geometry.placemark.descriptionValue]; marker.map = self.mapView; [annotations addObject:annotation]; } } } // set bounds in next run loop. dispatch_async(dispatch_get_main_queue(), ^{ GMSCoordinateBounds *bounds = [[GMSCoordinateBounds alloc] init]; for (id  annotation in annotations) { bounds = [bounds includingCoordinate:annotation.coordinate]; } GMSCameraUpdate *update = [GMSCameraUpdate fitBounds:bounds]; [self.mapView moveCamera:update]; [self.mapView animateToViewingAngle:50]; }); } 

在最后一个方法的最后，我们将更新摄像机视图以适应添加到地图中的所有标记。 如果不需要，您可以删除此部件。

Answer 2

SDK尚不支持KML。 请在问题跟踪器中提交function请求。

Answer 3

这就是我使用提到的iOS-KML-Framework解决类似问题的方法。

 #import  #import "KML.h" @property (weak, nonatomic) IBOutlet GMSMapView *mapView; - (void)loadZonesFromURL:(NSURL *)url { KMLRoot* kml = [KMLParser parseKMLAtURL: url]; for (KMLPlacemark *placemark in kml.placemarks) { GMSMutablePath *rect = [GMSMutablePath path]; if ([placemark.geometry isKindOfClass:[KMLPolygon class]]) { KMLLinearRing *ring = [(KMLPolygon *)placemark.geometry outerBoundaryIs]; for (KMLCoordinate *coordinate in ring.coordinates) { [rect addCoordinate:CLLocationCoordinate2DMake(coordinate.latitude, coordinate.longitude)]; } GMSPolygon *polygon = [GMSPolygon polygonWithPath:rect]; polygon.fillColor = [UIColor colorWithRed:67.0/255.0 green:172.0/255.0 blue:52.0/255.0 alpha:0.3]; polygon.map = self.mapView; } } }