Anvisningar: Kontrollera Key-Frame animeringstidpunkt
Det här exemplet visar hur du styr tidsinställningen för nyckelramar i en animering med nyckelramar. Precis som andra animeringar har key-frame-animeringar ett Duration attribut. Förutom att ange varaktigheten för en animering måste du ange vilken del av varaktigheten som tilldelas var och en av dess nyckelramar. Om du vill tilldela tiden anger du en KeyTime för varje nyckelram i animeringen.
KeyTime för varje nyckelram anger när nyckelramen slutar (den anger inte speltiden för en nyckelram). Du kan ange ett KeyTime som ett TimeSpan värde, i procent eller som Uniform eller Paced specialvärde.
Exempel
I följande exempel används en DoubleAnimationUsingKeyFrames för att animera en rektangel över skärmen. Nyckelbildrutornas nyckeltider ställs in med TimeSpan-värden.
/*
This Rectangle is animated with KeyTimes using TimeSpan Values.
It moves horizontally to 100 in the first 3 seconds, 100 to 300 in
the next second, and 300 to 500 in the last 6 seconds.
*/
// Create the a rectangle.
Rectangle aRectangle = new Rectangle();
aRectangle.Fill = Brushes.Blue;
aRectangle.Stroke = Brushes.Black;
aRectangle.StrokeThickness = 5;
aRectangle.Width = 50;
aRectangle.Height = 50;
// Create a transform to move the rectangle
// across the screen.
TranslateTransform translateTransform1 =
new TranslateTransform();
aRectangle.RenderTransform = translateTransform1;
// Create a DoubleAnimationUsingKeyFrames
// to animate the transform.
DoubleAnimationUsingKeyFrames transformAnimation =
new DoubleAnimationUsingKeyFrames();
transformAnimation.Duration = TimeSpan.FromSeconds(10);
// Animate to 100 at 3 seconds.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(100, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(3))));
// Animate to 300 at 4 seconds.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(300, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(4))));
// Animate to 500 at 10 seconds.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(500, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(10))));
// Start the animation when the rectangle is loaded.
aRectangle.Loaded += delegate(object sender, RoutedEventArgs e)
{
translateTransform1.BeginAnimation(TranslateTransform.XProperty, transformAnimation);
};
'
' This Rectangle is animated with KeyTimes using TimeSpan Values.
' It moves horizontally to 100 in the first 3 seconds, 100 to 300 in
' the next second, and 300 to 500 in the last 6 seconds.
'
' Create the a rectangle.
Dim aRectangle As New Rectangle()
aRectangle.Fill = Brushes.Blue
aRectangle.Stroke = Brushes.Black
aRectangle.StrokeThickness = 5
aRectangle.Width = 50
aRectangle.Height = 50
' Create a transform to move the rectangle
' across the screen.
Dim translateTransform1 As New TranslateTransform()
aRectangle.RenderTransform = translateTransform1
' Create a DoubleAnimationUsingKeyFrames
' to animate the transform.
Dim transformAnimation As New DoubleAnimationUsingKeyFrames()
transformAnimation.Duration = TimeSpan.FromSeconds(10)
' Animate to 100 at 3 seconds.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(100, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(3))))
' Animate to 300 at 4 seconds.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(300, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(4))))
' Animate to 500 at 10 seconds.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(500, KeyTime.FromTimeSpan(TimeSpan.FromSeconds(10))))
' Start the animation when the rectangle is loaded.
AddHandler aRectangle.Loaded, Sub(sender As Object, e As RoutedEventArgs) translateTransform1.BeginAnimation(TranslateTransform.XProperty, transformAnimation)
<!-- This Rectangle is animated with KeyTimes using TimeSpan Values.
It moves horizontally to 100 in the first 3 seconds, 100 to 300 in
the next second, and 300 to 500 in the last 6 seconds. -->
<Rectangle Fill="Blue" Stroke="Black" StrokeThickness="5"
Width="50" Height="50">
<Rectangle.RenderTransform>
<TranslateTransform x:Name="TranslateTransform1" />
</Rectangle.RenderTransform>
<Rectangle.Triggers>
<EventTrigger RoutedEvent="Rectangle.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="TranslateTransform1"
Storyboard.TargetProperty="X"
Duration="0:0:10">
<!-- These KeyTime properties are specified as TimeSpan values
which are in the form of "hours:minutes:seconds". -->
<LinearDoubleKeyFrame Value="100" KeyTime="0:0:3" />
<LinearDoubleKeyFrame Value="300" KeyTime="0:0:4" />
<LinearDoubleKeyFrame Value="500" KeyTime="0:0:10" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
Följande bild visar när värdet för varje nyckelram nås.
I nästa exempel visas en animering som är identisk, förutom att nyckelbildrutornas nyckeltider anges med procentvärden.
/*
This rectangle moves horizontally to 100 in the first 3 seconds,
100 to 300 in the next second, and 300 to 500 in the last 6 seconds.
*/
// Create the a rectangle.
Rectangle aRectangle = new Rectangle();
aRectangle.Fill = Brushes.Purple;
aRectangle.Stroke = Brushes.Black;
aRectangle.StrokeThickness = 5;
aRectangle.Width = 50;
aRectangle.Height = 50;
// Create a transform to move the rectangle
// across the screen.
TranslateTransform translateTransform2 =
new TranslateTransform();
aRectangle.RenderTransform = translateTransform2;
// Create a DoubleAnimationUsingKeyFrames
// to animate the transform.
DoubleAnimationUsingKeyFrames transformAnimation =
new DoubleAnimationUsingKeyFrames();
transformAnimation.Duration = TimeSpan.FromSeconds(10);
// Animate to 100 at 30% of the animation's duration.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(100, KeyTime.FromPercent(0.3)));
// Animate to 300 at 40% of the animation's duration.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(300, KeyTime.FromPercent(0.4)));
// Animate to 500 at 100% of the animation's duration.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(500, KeyTime.FromPercent(1.0)));
// Start the animation when the rectangle is loaded.
aRectangle.Loaded += delegate(object sender, RoutedEventArgs e)
{
translateTransform2.BeginAnimation(TranslateTransform.XProperty, transformAnimation);
};
'
' This rectangle moves horizontally to 100 in the first 3 seconds,
' 100 to 300 in the next second, and 300 to 500 in the last 6 seconds.
'
' Create the a rectangle.
Dim aRectangle As New Rectangle()
aRectangle.Fill = Brushes.Purple
aRectangle.Stroke = Brushes.Black
aRectangle.StrokeThickness = 5
aRectangle.Width = 50
aRectangle.Height = 50
' Create a transform to move the rectangle
' across the screen.
Dim translateTransform2 As New TranslateTransform()
aRectangle.RenderTransform = translateTransform2
' Create a DoubleAnimationUsingKeyFrames
' to animate the transform.
Dim transformAnimation As New DoubleAnimationUsingKeyFrames()
transformAnimation.Duration = TimeSpan.FromSeconds(10)
' Animate to 100 at 30% of the animation's duration.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(100, KeyTime.FromPercent(0.3)))
' Animate to 300 at 40% of the animation's duration.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(300, KeyTime.FromPercent(0.4)))
' Animate to 500 at 100% of the animation's duration.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(500, KeyTime.FromPercent(1.0)))
' Start the animation when the rectangle is loaded.
AddHandler aRectangle.Loaded, Sub(sender As Object, e As RoutedEventArgs) translateTransform2.BeginAnimation(TranslateTransform.XProperty, transformAnimation)
<!-- This rectangle moves horizontally to 100 in the first 3 seconds,
100 to 300 in the next second, and 300 to 500 in the last 6 seconds.-->
<Rectangle Fill="Purple" Stroke="Black" StrokeThickness="5"
Width="50" Height="50">
<Rectangle.RenderTransform>
<TranslateTransform x:Name="TranslateTransform2" />
</Rectangle.RenderTransform>
<Rectangle.Triggers>
<EventTrigger RoutedEvent="Rectangle.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="TranslateTransform2"
Storyboard.TargetProperty="X"
Duration="0:0:10">
<!-- KeyTime properties are expressed as Percentages. -->
<LinearDoubleKeyFrame Value="100" KeyTime="30%" />
<LinearDoubleKeyFrame Value="300" KeyTime="40%" />
<LinearDoubleKeyFrame Value="500" KeyTime="100%" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
Följande bild visar när värdet för varje nyckelram nås.
I nästa exempel används Uniform nyckeltidsvärden.
/*
This rectangle is animated with KeyTimes using Uniform values.
Goes to 100 in the first 3.3 seconds, 100 to
300 in the next 3.3 seconds, 300 to 500 in the last 3.3 seconds.
*/
// Create the a rectangle.
Rectangle aRectangle = new Rectangle();
aRectangle.Fill = Brushes.Red;
aRectangle.Stroke = Brushes.Black;
aRectangle.StrokeThickness = 5;
aRectangle.Width = 50;
aRectangle.Height = 50;
// Create a transform to move the rectangle
// across the screen.
TranslateTransform translateTransform3 =
new TranslateTransform();
aRectangle.RenderTransform = translateTransform3;
// Create a DoubleAnimationUsingKeyFrames
// to animate the transform.
DoubleAnimationUsingKeyFrames transformAnimation =
new DoubleAnimationUsingKeyFrames();
transformAnimation.Duration = TimeSpan.FromSeconds(10);
/*
KeyTime properties are expressed with values of Uniform. When a key time is set to
"Uniform" the total allotted time of the animation is divided evenly between key frames.
In this example, the total duration of the animation is ten seconds and there are four
key frames each of which are set to "Uniform", therefore, the duration of each key frame
is 3.3 seconds (10/3).
*/
// Animate to 100.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(100, KeyTime.Uniform));
// Animate to 300.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(300, KeyTime.Uniform));
// Animate to 500.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(500, KeyTime.Uniform));
// Start the animation when the rectangle is loaded.
aRectangle.Loaded += delegate(object sender, RoutedEventArgs e)
{
translateTransform3.BeginAnimation(TranslateTransform.XProperty, transformAnimation);
};
'
' This rectangle is animated with KeyTimes using Uniform values.
' Goes to 100 in the first 3.3 seconds, 100 to
' 300 in the next 3.3 seconds, 300 to 500 in the last 3.3 seconds.
'
' Create the a rectangle.
Dim aRectangle As New Rectangle()
aRectangle.Fill = Brushes.Red
aRectangle.Stroke = Brushes.Black
aRectangle.StrokeThickness = 5
aRectangle.Width = 50
aRectangle.Height = 50
' Create a transform to move the rectangle
' across the screen.
Dim translateTransform3 As New TranslateTransform()
aRectangle.RenderTransform = translateTransform3
' Create a DoubleAnimationUsingKeyFrames
' to animate the transform.
Dim transformAnimation As New DoubleAnimationUsingKeyFrames()
transformAnimation.Duration = TimeSpan.FromSeconds(10)
'
' KeyTime properties are expressed with values of Uniform. When a key time is set to
' "Uniform" the total allotted time of the animation is divided evenly between key frames.
' In this example, the total duration of the animation is ten seconds and there are four
' key frames each of which are set to "Uniform", therefore, the duration of each key frame
' is 3.3 seconds (10/3).
'
' Animate to 100.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(100, KeyTime.Uniform))
' Animate to 300.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(300, KeyTime.Uniform))
' Animate to 500.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(500, KeyTime.Uniform))
' Start the animation when the rectangle is loaded.
AddHandler aRectangle.Loaded, Sub(sender As Object, e As RoutedEventArgs) translateTransform3.BeginAnimation(TranslateTransform.XProperty, transformAnimation)
<!-- This rectangle is animated with KeyTimes using Uniform values.
Goes to 100 in the first 3.3 seconds, 100 to
300 in the next 3.3 seconds, 300 to 500 in the last 3.3 seconds. -->
<Rectangle Fill="Red" Stroke="Black" StrokeThickness="5"
Width="50" Height="50">
<Rectangle.RenderTransform>
<TranslateTransform x:Name="TranslateTransform3" />
</Rectangle.RenderTransform>
<Rectangle.Triggers>
<EventTrigger RoutedEvent="Rectangle.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="TranslateTransform3"
Storyboard.TargetProperty="X"
Duration="0:0:10">
<!-- KeyTime properties are expressed with values of Uniform. When a key time is set to
"Uniform" the total allotted time of the animation is divided evenly between key frames.
In this example, the total duration of the animation is ten seconds and there are four
key frames each of which are set to "Uniform", therefore, the duration of each key frame
is 3.3 seconds (10/3). -->
<LinearDoubleKeyFrame Value="100" KeyTime="Uniform" />
<LinearDoubleKeyFrame Value="300" KeyTime="Uniform" />
<LinearDoubleKeyFrame Value="500" KeyTime="Uniform" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
Följande bild visar när värdet för varje nyckelram nås.
I det sista exemplet används Paced nyckeltidsvärden.
/*
This rectangle is animated with KeyTimes using Paced Values.
The rectangle moves between key frames at uniform rate except for first key frame
because using a Paced value on the first KeyFrame in a collection of frames gives a time of zero.
*/
// Create the a rectangle.
Rectangle aRectangle = new Rectangle();
aRectangle.Fill = Brushes.Orange;
aRectangle.Stroke = Brushes.Black;
aRectangle.StrokeThickness = 5;
aRectangle.Width = 50;
aRectangle.Height = 50;
// Create a transform to move the rectangle
// across the screen.
TranslateTransform translateTransform4 =
new TranslateTransform();
aRectangle.RenderTransform = translateTransform4;
// Create a DoubleAnimationUsingKeyFrames
// to animate the transform.
DoubleAnimationUsingKeyFrames transformAnimation =
new DoubleAnimationUsingKeyFrames();
transformAnimation.Duration = TimeSpan.FromSeconds(10);
/*
Use Paced values when a constant rate is desired.
The time allocated to a key frame with a KeyTime of "Paced" is
determined by the time allocated to the other key frames of the animation. This time is
calculated to attempt to give a "paced" or "constant velocity" for the animation.
*/
// Animate to 100.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(100, KeyTime.Paced));
// Animate to 300.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(300, KeyTime.Paced));
// Animate to 500.
transformAnimation.KeyFrames.Add(
new LinearDoubleKeyFrame(500, KeyTime.Paced));
// Start the animation when the rectangle is loaded.
aRectangle.Loaded += delegate(object sender, RoutedEventArgs e)
{
translateTransform4.BeginAnimation(TranslateTransform.XProperty, transformAnimation);
};
'
' This rectangle is animated with KeyTimes using Paced Values.
' The rectangle moves between key frames at uniform rate except for first key frame
' because using a Paced value on the first KeyFrame in a collection of frames gives a time of zero.
'
' Create the a rectangle.
Dim aRectangle As New Rectangle()
aRectangle.Fill = Brushes.Orange
aRectangle.Stroke = Brushes.Black
aRectangle.StrokeThickness = 5
aRectangle.Width = 50
aRectangle.Height = 50
' Create a transform to move the rectangle
' across the screen.
Dim translateTransform4 As New TranslateTransform()
aRectangle.RenderTransform = translateTransform4
' Create a DoubleAnimationUsingKeyFrames
' to animate the transform.
Dim transformAnimation As New DoubleAnimationUsingKeyFrames()
transformAnimation.Duration = TimeSpan.FromSeconds(10)
'
' Use Paced values when a constant rate is desired.
' The time allocated to a key frame with a KeyTime of "Paced" is
' determined by the time allocated to the other key frames of the animation. This time is
' calculated to attempt to give a "paced" or "constant velocity" for the animation.
'
' Animate to 100.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(100, KeyTime.Paced))
' Animate to 300.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(300, KeyTime.Paced))
' Animate to 500.
transformAnimation.KeyFrames.Add(New LinearDoubleKeyFrame(500, KeyTime.Paced))
' Start the animation when the rectangle is loaded.
AddHandler aRectangle.Loaded, Sub(sender As Object, e As RoutedEventArgs) translateTransform4.BeginAnimation(TranslateTransform.XProperty, transformAnimation)
<!-- This rectangle is animated with KeyTimes using Paced Values.
The rectangle moves between key frames at uniform rate except for first key frame
because using a Paced value on the first KeyFrame in a collection of frames gives a time of zero. -->
<Rectangle Fill="Orange" Stroke="Black" StrokeThickness="5"
Width="50" Height="50">
<Rectangle.RenderTransform>
<TranslateTransform x:Name="TranslateTransform4" />
</Rectangle.RenderTransform>
<Rectangle.Triggers>
<EventTrigger RoutedEvent="Rectangle.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames
Storyboard.TargetName="TranslateTransform4"
Storyboard.TargetProperty="X"
Duration="0:0:10">
<!-- Use Paced values when a constant rate is desired.
The time allocated to a key frame with a KeyTime of "Paced" is
determined by the time allocated to the other key frames of the animation. This time is
calculated to attempt to give a "paced" or "constant velocity" for the animation. -->
<LinearDoubleKeyFrame Value="100" KeyTime="Paced" />
<LinearDoubleKeyFrame Value="300" KeyTime="Paced" />
<LinearDoubleKeyFrame Value="500" KeyTime="Paced" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Rectangle.Triggers>
</Rectangle>
Följande bild visar när värdet för varje nyckelram nås.
För enkelhetens skull använder kodversionerna av det här exemplet lokala animeringar, inte storyboards, eftersom endast en enda animering tillämpas på en enda egenskap, men exemplen kan ändras för att använda storyboards i stället. Ett exempel som visar hur du deklarerar en storyboard i kod finns i Animera en egenskap med hjälp av en Storyboard-.
Det fullständiga exemplet finns i Exempel på keyframe-animering. Mer information om nyckelramsanimeringar finns i översikt över animeringar Key-Frame.
Se även
- Key-Frame Översikt över animeringar
- översikt över animering
- Instruktionsämnen
Samarbeta med oss på GitHub
Källan för det här innehållet finns på GitHub, där du även kan skapa och granska ärenden och pull-begäranden. Se vår deltagarguide för mer information.
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