2021-01-29

WPF PointAnimationUsingKeyFrames 动画

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想到昨天去健身房,我拿哑铃练肱二头肌,旁边有一女的

时不时的侧着脸来看我,还嘴角带着笑,妈的嘲笑我练的重量小吗,

我拿12kg在练,那女的拿个2.5kg在那举着玩,还好意思笑我?

 

前言 

前几天逛Gayhub看到一篇CSS 的动画,然后就想着用WPF实现。

下方是CSS中的效果:

描述下我实现中所走的弯路。

第一次实验:我新创建 Rectangle 然后其创建了一个装饰器 Adorner

然后在装饰器画了一个Pen ,像移动X轴  然后转换角度 接着走Y轴。事实给了我一记响亮的嘴巴。

Pen renderPen = new Pen(new SolidColorBrush(Colors.Red), 2.5); drawingContext.DrawLine(renderPen, new Point(0, 0), new Point(AdornedElement.RenderSize.Width / 10, 0)); var translateTransform = new TranslateTransform();   var rotateTransform = new RotateTransform();   var transformGroup = new TransformGroup();   transformGroup.Children.Add(translateTransform);   transformGroup.Children.Add(rotateTransform);   this.RenderTransformOrigin = new Point(0.5,0.5);   this.RenderTransform = transformGroup;   var doubleAnimationX = new DoubleAnimation   {    To = AdornedElement.RenderSize.Width - AdornedElement.RenderSize.Width / 10,    Duration = new Duration(TimeSpan.FromSeconds(2))   };   TranslateTransform t = transformGroup.Children[0] as TranslateTransform;   t.BeginAnimation(TranslateTransform.XProperty, doubleAnimationX);   var doubleAnimationAngle = new DoubleAnimation   {    To = 90,    Duration = new Duration(TimeSpan.FromSeconds(.1))   };   RotateTransform t2 = transformGroup.Children[1] as RotateTransform;   t2.BeginAnimation(RotateTransform.AngleProperty, doubleAnimationAngle);

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上当时的效果图。

(⊙﹏⊙) 是不是就像探照灯一样。

我再次尝试画了一个圆设置Clip发现还是错误的。

开始上源码

尝试PointAnimationUsingKeyFrames发现可行o(* ̄▽ ̄*)ブ

<Window.Resources>  <Storyboard x:Key="Storyboard1" RepeatBehavior="Forever">   <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.StartPoint)"           Storyboard.TargetName="rectangle">    <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.855,0.148"/>    <EasingPointKeyFrame KeyTime="0:0:1" Value="0.852,0.855"/>    <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.148,0.855"/>    <EasingPointKeyFrame KeyTime="0:0:2" Value="0.144,0.149"/>    <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,0"/>       </PointAnimationUsingKeyFrames>   <PointAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Stroke).(LinearGradientBrush.EndPoint)"           Storyboard.TargetName="rectangle">    <EasingPointKeyFrame KeyTime="0:0:0.5" Value="0.145,0.852"/>    <EasingPointKeyFrame KeyTime="0:0:1" Value="0.148,0.145"/>    <EasingPointKeyFrame KeyTime="0:0:1.5" Value="0.852,0.145"/>    <EasingPointKeyFrame KeyTime="0:0:2" Value="0.856,0.851"/>    <EasingPointKeyFrame KeyTime="0:0:2.5" Value="0,1"/>       </PointAnimationUsingKeyFrames>  </Storyboard> </Window.Resources> <Window.Triggers>  <EventTrigger RoutedEvent="FrameworkElement.Loaded">   <BeginStoryboard Storyboard="{StaticResource Storyboard1}"/>  </EventTrigger> </Window.Triggers> <Grid>  <Rectangle x:Name="rectangle" Width="200" Height="200"     HorizontalAlignment="Center" VerticalAlignment="Center"     StrokeThickness="3">   <Rectangle.Stroke>    <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0" Opacity=".6">     <GradientStop Color="Transparent" Offset="0"/>     <GradientStop Color="#FF025F20" Offset="1"/>    </LinearGradientBrush>   </Rectangle.Stroke>  </Rectangle> </Grid>

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成品图:

如果大佬有更好的方式欢迎交流。

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点击链接加入群聊想到昨天去健身房,我拿哑铃练肱二头肌,旁边有一女的时不时的侧着脸来看我,还嘴角带着笑,妈的嘲笑我练的重量小吗,我拿12kg在练,那女的拿个2.5kg在那举着玩,还好意思笑我?前言前几天逛Gayhub看到一篇CSS的动画,然后就想着用WPF实现。下方是CSS中的效果:描述下我实现中所走的弯路。第一次实验:我新创建Rectangle然后其创建了一个装饰器Adorner然后在装饰器画了一
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