Visual.AnchorPoint 属性

定义

命名空间:

Windows.UI.Composition

视觉对象上要定位在视觉对象偏移量的点。 值根据视觉对象的大小进行规范化。 可进行动画处理。

public:
 property float2 AnchorPoint { float2 get(); void set(float2 value); };

float2 AnchorPoint();

void AnchorPoint(float2 value);

public Vector2 AnchorPoint { get; set; }

var vector2 = visual.anchorPoint;
visual.anchorPoint = vector2;

Public Property AnchorPoint As Vector2

属性值

Vector2 Vector2

float2

视觉对象上要定位在视觉对象偏移量的点。 值根据视觉对象的大小进行规范化。

Windows 要求

设备系列	Windows 10 (在 10.0.10586.0 中引入)
API contract	Windows.Foundation.UniversalApiContract (在 v2.0 中引入)

示例

using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Composition;
using Windows.UI.Xaml.Hosting;
using System.Numerics;

namespace AnchorPointSample
{
    /// <summary>
    /// Using AnchorPoint to Center a Rectangle
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
            this.Loaded += MainPage_Loaded;
        }

        private void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            // Get the backing visual for the "CenteredElement" XAML Element
            Visual root = ElementCompositionPreview.GetElementVisual(CenteredElement);
            Compositor compositor = root.Compositor;

            // Create a solid color visual
            SpriteVisual mainVisual = compositor.CreateSpriteVisual();
            mainVisual.Size = new Vector2(200, 200);
            mainVisual.Brush = compositor.CreateColorBrush(Windows.UI.Colors.Blue);

            // Set the anchor point to center the rectangle
            mainVisual.AnchorPoint = new Vector2(0.5f, 0.5f);

            // Insert the rectangle as a child of the XAML element
            ElementCompositionPreview.SetElementChildVisual(CenteredElement, mainVisual);
        }
    }
}