Xamarin Forms Teechart - 绘制图像

Xamarin Forms Teechart - Draw Image

是否有以 xamarin 形式在 steema teechart 中绘制图像的工作示例?我真的很纠结这个。

将图像分配到后墙或面板都不起作用:

  var backImage = new Image();
  backImage.Source = ImageSource.FromUri(new Uri("http://www.steema.com/uploads/news/xamarinforms_280x210.png"));

  tChart1.Walls.Back.Gradient.Visible = false;
  tChart1.Walls.Back.Image = backImage;

  tChart1.Panel.Gradient.Visible = false;
  tChart1.Panel.Image = backImage;

也不直接画在canvas上:

void tChart1_BeforeDrawSeries(object sender, Graphics3D g)
{
  Rectangle chartRect = tChart1.Chart.ChartRect;
  var backImage = new Image();
  backImage.Source = ImageSource.FromUri(new Uri("http://www.steema.com/uploads/news/xamarinforms_280x210.png"));

  g.Draw(chartRect, chartRect, backImage, false);
}

所以我已将其添加到错误列表中 (bug 1299)。在 iOS 和 Android 中都发生。