ios - 这里映射 iOS SDK : Rotate the marker in Here maps

Question

我正在使用 Here map 开发车辆跟踪应用程序。我想根据车辆的转向将 Here map 中的标记图标 (NMAMapMarker) 旋转到特定角度(类似于 Uber 应用程序)。之前我用过谷歌地图，谷歌地图中的标记提供了一个旋转属性，可以将标记旋转到特定的角度。 Here map 中是否有任何类似的属性可用？

这个有更新吗 Nokia Here maps Navigation marker orientation

谢谢

Answer 1

一般来说，不可能旋转 NMAMapMarker，在 HERE iOS Premium SDK 中，默认位置指示器 NMAPositionIndicator 具有属性 tracksCourse，它将使用设备可用的标题旋转指示器。

另一种方法是使用上面评论中提到的 NMAMapLocalModel

   ... 
   NMAFloatMesh *mesh = [[NMAFloatMesh alloc] init];

    float size = 5.0f;

    float vertices[4 * 3] = {-size / 2,   -size/2, 0.0f,
        -size/2,   size / 2, 0.0f,
        size / 2,   -size/2, 0.0f,
        size/2,   size/2, 0.0f,
    };

    [mesh setVertices:vertices withCount:4];

    float textureCoordinates[4 * 2] = {0.0,  0.0,
        0.0,  1.0,
        1.0,  0.0,
        1.0,  1.0};

    [mesh setTextureCoordinates:textureCoordinates withCount:4];

    short triangles[2 * 3] = {2, 1, 0,
        1, 2, 3};

    [mesh setTriangles:triangles withCount:2];

    _customPosIndicator = [[NMAMapLocalModel alloc] initWithMesh:mesh];

    NMAImage *image = [NMAImage imageWithUIImage:[UIImage imageNamed:@"256-256-pin2.png"]];

    /*
     // To load svg file as a custom position indicator, please use this code.
     NSBundle* main = [NSBundle mainBundle];
     NSString *resourcePath = [main pathForResource:@"tracker-1093167" ofType:@"svg"];

     NSLog(@"resourcePath: %@", resourcePath);
     NSData *resourceData = [NSData dataWithContentsOfFile:resourcePath];
     NMAImage *image = [NMAImage imageWithData:resourceData];
     */

    [_customPosIndicator setAutoscaled:true];
    [_customPosIndicator setTexture:image];
    [_customPosIndicator setCoordinates:[NMAGeoCoordinates alloc]];

    self.mapView.positionIndicator.displayObject = _customPosIndicator;

    self.mapView.positionIndicator.visible = true;

    ...

- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(nonnull CLHeading *)newHeading {
    NSLog(@"%f", newHeading.magneticHeading);
    if(_customPosIndicator != nil){
        [_customPosIndicator setYaw:newHeading.magneticHeading];
    }
}