EasingPointKeyFrame 类
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
将缓动函数与 PointAnimationUsingKeyFrames 关键帧动画相关联。
public ref class EasingPointKeyFrame sealed : PointKeyFrame
/// [Windows.Foundation.Metadata.Activatable(65536, Windows.Foundation.UniversalApiContract)]
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class EasingPointKeyFrame final : PointKeyFrame
/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
/// [Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
class EasingPointKeyFrame final : PointKeyFrame
[Windows.Foundation.Metadata.Activatable(65536, typeof(Windows.Foundation.UniversalApiContract))]
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class EasingPointKeyFrame : PointKeyFrame
[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
[Windows.Foundation.Metadata.Activatable(65536, "Windows.Foundation.UniversalApiContract")]
public sealed class EasingPointKeyFrame : PointKeyFrame
Public NotInheritable Class EasingPointKeyFrame
Inherits PointKeyFrame
<EasingPointKeyFrame .../>
- 继承
- 属性
Windows 要求
设备系列 |
Windows 10 (在 10.0.10240.0 中引入)
|
API contract |
Windows.Foundation.UniversalApiContract (在 v1.0 中引入)
|
示例
此 XAML 示例演示如何使用具有与它们关联的缓动函数的关键帧创建一个动画,该动画模拟椭圆在空中上升并回落,从而反弹到停止。
<Canvas Width="400" Height="300">
<Canvas.Resources>
<Storyboard x:Name="myStoryboard">
<PointAnimationUsingKeyFrames
Storyboard.TargetProperty="Center"
Storyboard.TargetName="MyAnimatedEllipseGeometry"
EnableDependentAnimation="True">
<!-- This keyframe animates the ellipse up to the crest
where it slows down and stops. -->
<EasingPointKeyFrame Value="50,20" KeyTime="00:00:02">
<EasingPointKeyFrame.EasingFunction>
<CubicEase EasingMode="EaseOut"/>
</EasingPointKeyFrame.EasingFunction>
</EasingPointKeyFrame>
<!-- This keyframe animates the ellipse back down and makes
it bounce. -->
<EasingPointKeyFrame Value="50,200" KeyTime="00:00:06">
<EasingPointKeyFrame.EasingFunction>
<BounceEase Bounces="5" EasingMode="EaseOut"/>
</EasingPointKeyFrame.EasingFunction>
</EasingPointKeyFrame>
</PointAnimationUsingKeyFrames>
</Storyboard>
</Canvas.Resources>
<Path PointerPressed="Pointer_Clicked" Fill="Blue">
<Path.Data>
<!-- Describes an ellipse. -->
<EllipseGeometry x:Name="MyAnimatedEllipseGeometry"
Center="50,200" RadiusX="15" RadiusY="15" />
</Path.Data>
</Path>
</Canvas>
// When the user clicks the ellipse, the animation
// begins.
private void Pointer_Clicked(object sender, PointerRoutedEventArgs e)
{
myStoryboard.Begin();
}
' When the user clicks the ellipse, the animation
' begins.
Private Sub Pointer_Clicked(ByVal sender As Object, ByVal e As PointerRoutedEventArgs)
myStoryboard.Begin()
End Sub
注解
缓动函数允许将自定义的数学公式应用到动画。 数学运算通常对于制作在 2-D 坐标系中模拟真实物理效果的动画非常有用。 例如,用户可能希望某个对象逼真地弹跳或表现出像在弹簧上一样。 有关缓动函数的列表以及如何使用它们的信息,请参阅 关键帧动画和缓动函数动画。
构造函数
EasingPointKeyFrame() |
初始化 EasingPointKeyFrame 类的新实例。 |
属性
Dispatcher |
获取与此对象关联的 CoreDispatcher 。 CoreDispatcher 表示可以访问 UI 线程上的 DependencyObject 的工具,即使代码是由非 UI 线程启动的。 (继承自 DependencyObject) |
EasingFunction |
获取或设置应用于关键帧的缓动函数。 |
EasingFunctionProperty |
标识 EasingFunction 依赖属性。 |
KeyTime |
获取或设置应达到关键帧的目标 值 的时间。 (继承自 PointKeyFrame) |
Value |
获取或设置关键帧的目标值。 (继承自 PointKeyFrame) |
方法
ClearValue(DependencyProperty) |
清除依赖属性的本地值。 (继承自 DependencyObject) |
GetAnimationBaseValue(DependencyProperty) |
返回为依赖属性建立的任何基值,该基值适用于动画未处于活动状态的情况。 (继承自 DependencyObject) |
GetValue(DependencyProperty) |
从 DependencyObject 返回依赖属性的当前有效值。 (继承自 DependencyObject) |
ReadLocalValue(DependencyProperty) |
如果设置了本地值,则返回依赖属性的本地值。 (继承自 DependencyObject) |
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback) |
注册通知函数,用于侦听此 DependencyObject 实例上对特定 DependencyProperty 的更改。 (继承自 DependencyObject) |
SetValue(DependencyProperty, Object) |
设置 DependencyObject 上依赖属性的本地值。 (继承自 DependencyObject) |
UnregisterPropertyChangedCallback(DependencyProperty, Int64) |
取消以前通过调用 RegisterPropertyChangedCallback 注册的更改通知。 (继承自 DependencyObject) |