如何在左上角设置OxyPlot原点？

Question

我创建了一个包含20个系列的 func pageViewController(pageViewController: UIPageViewController, viewControllerBeforeViewController viewController: UIViewController) -> UIViewController? { let currentDetailVC: RAFeedDetailViewController = viewController as! RAFeedDetailViewController return vcAtIndex(currentDetailVC.index - 1) } func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? { let currentDetailVC: RAFeedDetailViewController = viewController as! RAFeedDetailViewController return vcAtIndex(currentDetailVC.index + 1) } func vcAtIndex(index: Int) -> RAFeedDetailViewController? { guard index < self.dataSourceItems.count - 1 && index >= 0 else { return nil } /* insert logic here to get the correct view controller */ let detailVC: RAArticleDetailViewController = self.storyboard?.instantiateViewControllerWithIdentifier(String(RAArticleDetailViewController.self)) as! RAArticleDetailViewController detailVC.index = index return vc } 图。每个OxyPlot代表一个频道。原点现在位于左下角。

见下图：

我想让他们从上到下排序。如何在左上角设置OxyPlot原点？（见下图）

Answer 1

我知道这是旧的，但您只需将Axis StartPosition设置为1，将EndPosition设置为0

CategoryAxis myAxis = new CategoryAxis();
myAxis.StartPosition = 1;
myAxis.EndPosition = 0;

Answer 2

我最近发现Date Oxyplot配置适当Axis StartPosition get和set axis的起始位置。

但是我没想到它是否会改变原点的方向。

我想出了一个不同的解决方案，我决定反向绘制它们并使用CategoryAxis作为左轴并按降序设置标签。

plotModel.Axes.Add(new LinearAxis
{
    Position = AxisPosition.Bottom,
    MajorTickSize = 0,
    MinorTickSize = 0
});

plotModel.Axes.Add(new CategoryAxis
{
    Position = AxisPosition.Left,
    Title = MyTitle,
    MajorTickSize = 0,
    MinorTickSize = 0,
    LabelField = "LabelChannels",
    Labels = 
    {   "20",
        "19",
        ...
        "3",
        "2",
        "1",
    }
});

虽然知道是否还有其他任何方式，比我做的更简单，这将是一件好事。