我已经为一个元素创建了一个自定义类，它继承自UWP中的Path类（箭头绘图），现在它似乎工作正常，但当我试图将其中的两个元素放在屏幕上时，其中一个不会呈现。我首先初始化的那个是将要呈现的那个，我认为它可能与类示例引用一些在它们之间共享的指针或类似的东西有关，但我还没有找到解决方案。

下面是我编写的自定义类的代码：

public sealed partial class TimePickerArrow : Path
{ 
    #region Arrow Direction XAML Property
    public enum Directions
    {
        Up = 0,
        Down = 180,
        Left = -90,
        Right = 90
    };

    public static readonly DependencyProperty DirectionProperty =
    DependencyProperty.Register("Direction", typeof(Directions), typeof(TimePickerArrow), new PropertyMetadata(Directions.Up, OnArrowDirectionChanged));

    public Directions Direction
    {
        get { return (Directions)GetValue(DirectionProperty); }
        set { SetValue(DirectionProperty, value); }
    }

    #endregion

    #region Arrow Hover Effect Fill Xaml Property

    public static readonly DependencyProperty HoverFillProperty =
    DependencyProperty.Register("HoverFill", typeof(Brush), typeof(TimePickerArrow), new PropertyMetadata(new SolidColorBrush(Colors.Gray)));

    public Brush HoverFill
    {
        get { return (Brush)GetValue(HoverFillProperty); }
        set { SetValue(HoverFillProperty, value); }
    }

    #endregion

    // static arrow color set by the Fill property of the path, 
    // used to save the original arrow fill color that gets changed on hover
    Brush StaticFill; 

    public TimePickerArrow()
    {
        #region PATH PROPERTIES INIT
        this.Direction = Direction;
        this.HoverFill = HoverFill;
        this.Fill = new SolidColorBrush(Colors.Black);
        this.StaticFill = Fill;
        #endregion

        InitArrowPath();

        this.PointerEntered += TimePickerArrow_HoverEntered;
        this.PointerExited += TimePickerArrow_HoverExited;
    }
    private void InitArrowPath()
    {
        this.Style = Application.Current.Resources["TimePickerArrowPath"] as Style;
    }
    private static void OnArrowDirectionChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        TimePickerArrow arrow = (TimePickerArrow)d;
        Directions newArrowDirection = (Directions)e.NewValue;

        // Update the RenderTransform based on the new Direction value

        CompositeTransform arrowDirectionRotation = new CompositeTransform();
        arrowDirectionRotation.Rotation = (double)newArrowDirection;

        arrow.RenderTransform = arrowDirectionRotation;
    }
    private void TimePickerArrow_HoverEntered(object sender, PointerRoutedEventArgs e)
    {
        this.Fill = HoverFill;
    }
    private void TimePickerArrow_HoverExited(object sender, PointerRoutedEventArgs e)
    {
        this.Fill = StaticFill;
    }
}

下面是InitPath（）方法中引用的样式：

<Style x:Key="TimePickerArrowPath" TargetType="Path">
    <Setter Property="Data" Value="M32 6 L58 32 L48.07142857142857 41.92857142857143 L32 25.857142857142854 L16 41.92857142857143 L6 31.92857142857143 Z"/>
    <Setter Property="RenderTransformOrigin" Value="0.5,0.5"/>
    <Setter Property="Stretch" Value="Fill"/>
</Style>

感谢所有愿意做出贡献的人。