为UWP地图中的MapIcon纬度值指定PropertyPath

Question

我正在尝试在必应地图的UWP版本中动画显示MapIcon的位置。我在为用作图标中心值的GeoPoint的Latitude组件( double值)指定PropertyPath时遇到问题：

        MapIcon mapIcon1 = new MapIcon();
        mapIcon1.Location = myMap.Center;
        mapIcon1.NormalizedAnchorPoint = new Point(0.5, 1.0);
        mapIcon1.Title = "My Friend";
        mapIcon1.Image = mapIconStreamReference;
        mapIcon1.ZIndex = 0;
        myMap.MapElements.Add(mapIcon1);

        double centerLatitude = myMap.Center.Position.Latitude;
        double centerLongitude = myMap.Center.Position.Longitude;
        Storyboard storyboard = new Storyboard();
        DoubleAnimation animation = new DoubleAnimation();
        animation.From = centerLatitude;
        animation.To = centerLatitude + 100f;
        animation.Duration = new Duration(new TimeSpan(0, 0, 0, 5));
        animation.EnableDependentAnimation = true;
        storyboard.Children.Add(animation);
        //Storyboard.SetTargetProperty(animation, "(MapIcon.Location)(Geopoint.Position)(BasicGeoposition.Latitude)");
        //Storyboard.SetTargetProperty(animation, "(MapIcon.Location)(MapControl.Center)(Geopoint.Position)(BasicGeoposition.Latitude)");
        //Storyboard.SetTargetProperty(animation, "(MapIcon.Location)(BasicGeoposition.Latitude)");
        //Storyboard.SetTargetProperty(animation, "(MapIcon.Location.Latitude)");
        Storyboard.SetTarget(storyboard, mapIcon1);
        storyboard.Begin();

注释掉的语句都不起作用；它们都会导致"Cannot resolve TargetProperty on specified object“错误。我对第一次尝试"(MapIcon.Location)(Geopoint.Position)(BasicGeoposition.Latitude)"特别有希望，但没有运气。

(我能够成功地为MapIcon的颜色属性设置动画。)

Answer 1

Storyboard.SetTargetProperty的目标是应用动画的依赖属性。所以，你想要将动画应用于‘Latitude’是不可能的。

你就得自己做了。例如，使用DispatcherTimer。