Question

我已将谷歌地图嵌入到iPhone上的地图中的视图控制器中。我可以使用以下方式创建我的地图：

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。我见过KMS教程，但是使用了其他一些套件，MK。无论如何，我有没有办法使用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。我已使用KML-Viewer

的项目移植了此代码

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中查看几何项目，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 <MKAnnotation> 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updating the camera view以适应添加到地图中的所有标记。如果不需要，您可以删除此部分。

Answer 2

SDK尚不支持KML。请在issue tracker中提交功能请求。

Answer 3

这是我使用提到的iOS-KML-Framework解决类似问题的方法。

#import <GoogleMaps/GoogleMaps.h>
#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;

    }

}


}

如何使用iOS API将KML文件URL加载到Google地图？

3 个答案: