public static List <NSObject> toFeatureList(this IEnumerable <Route> routes)
{
var features = new List <NSObject>();
var nativeScale = DisplayMetricsHelper.instance.nativeScale;
foreach (var route in routes)
{
var coordinates = route.points.Select((MapBox.Models.Position arg) => {
return(new CLLocationCoordinate2D(arg.latitude, arg.longitude));
});
var featureInArrayFormat = coordinates.ToArray();
var feature = new MGLPolylineFeature();
feature.SetCoordinates(ref featureInArrayFormat[0], (System.nuint)featureInArrayFormat.Length);
feature.Attributes = NSDictionary <NSString, NSObject> .FromObjectsAndKeys(
new object[] {
route.borderLineColor,
route.lineColor,
(route.borderLineWidth * 2 + route.lineWidth) * nativeScale,
route.lineWidth *nativeScale
},
new object[] {
MapboxRenderer.border_line_color_key,
MapboxRenderer.line_color_key,
MapboxRenderer.border_line_width_key,
MapboxRenderer.line_width_key
});
features.Add(feature);
}
return(features);
}
void DrawPolyline()
{
var jsonPath = NSBundle.MainBundle.PathForResource("example", "geojson");
NSData data = NSFileManager.DefaultManager.Contents(jsonPath);
NSError err;
MGLShapeCollectionFeature shapeCollectionFeature = (MGLShapeCollectionFeature)MGLShape.ShapeWithData(data, (uint)NSStringEncoding.UTF8, out err);
MGLPolylineFeature polyline = (MGLPolylineFeature)shapeCollectionFeature.Shapes.First();
mapView.AddAnnotation(polyline);
}
