在 UWP Bing 地图中为 MapIcon 纬度值指定 PropertyPath

Question

我正在尝试在 UWP 版本的 Bing 地图中为 MapIcon 的位置设置动画。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；它们都导致“无法解析指定对象上的 TargetProperty”错误。我特别希望第一次尝试"(MapIcon.Location)(Geopoint.Position)(BasicGeoposition.Latitude)"，但没有运气。

（我能够成功地为 MapIcon 的 Color 属性设置动画。）

Answer 1

Storyboard.SetTargetProperty 以应用动画的依赖属性为目标。所以，你想对“纬度”应用动画是不可能的。

你必须自己做。例如，使用 DispatcherTimer。