如何使用Skiasharp将时钟的时针附加到手势动作上

Question

我正在尝试通过跟随手指手势来移动时针。我为此使用 SkiaSharp 。我陷入了将时针附加到手指手势动作上的问题。

我在Touch_Handle方法下面，点击了以下函数并执行了所有操作，但是触摸时时钟（当前至少尝试移动时钟）没有动。

Xaml：

<Grid>
                <skia:SKCanvasView 
                    x:Name="canvasView" 
                    EnableTouchEvents="true"
                    Touch="Handle_Touch"
                    PaintSurface="OnCanvasViewPaintSurface" />

    </Grid>

Xaml.cs

private void Handle_Touch(object sender, SKTouchEventArgs args)
        {           

            SKPoint point = args.Location;

            switch (args.ActionType)
            {
                case SKTouchAction.Pressed:
                    if (!inProgressPaths.ContainsKey(args.Id))
                    {
                        SKPath path = new SKPath();
                        path.MoveTo(args.Location);
                        inProgressPaths.Add(args.Id, path);
                        ((SKCanvasView)sender).InvalidateSurface();
                    }
                    break;

                case SKTouchAction.Moved:
                    if (inProgressPaths.ContainsKey(args.Id))
                    {
                        SKPath path = inProgressPaths[args.Id];
                        path.LineTo(args.Location);
                        ((SKCanvasView)sender).InvalidateSurface();
                    }
                    break;

                case SKTouchAction.Released:
                    if (inProgressPaths.ContainsKey(args.Id))
                    {
                        completedPaths.Add(inProgressPaths[args.Id]);
                        inProgressPaths.Remove(args.Id);
                        ((SKCanvasView)sender).InvalidateSurface();
                    }
                    break;

                case SKTouchAction.Cancelled:
                    if (inProgressPaths.ContainsKey(args.Id))
                    {
                        inProgressPaths.Remove(args.Id);
                        ((SKCanvasView)sender).InvalidateSurface();
                    }
                    break;
            }

            // we have handled these events
            args.Handled = true;
        }