.实现效果
目前只实现了秒针动画，下篇文章实现完整效果，可在网站上查看，微信公众号今天只发布了一篇。
2.业务场景
玩具
3.编码实现
使用 .Net Core 3.1 创建名为 “Clock” 的WPF解决方案。
3.1 工程结构
工程简单，只更改一个主窗体文件，另加一个时钟背景图片
3.2 主窗体 MainWindow.xaml
布局时钟的时针、分针、秒针，及添加秒针动画，秒针动画写的比较啰嗦，只写了30秒，其实可以在MainWindow.xaml.cs文件中用for循环添加EasingDoubleKeyFrame，直接添加到xaml中占代码也不美观，暂时先这样吧，下篇文章有空改了。
<Window x:Class="Clock.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Clock"
mc:Ignorable="d"
AllowsTransparency="True" WindowStyle="None" ResizeMode="NoResize"
Height="520" Width="520" WindowStartupLocation="CenterScreen" Background="{x:Null}">
<Window.Resources>
<Storyboard x:Key="sbseconds" RepeatBehavior="Forever">
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="second" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)">
<EasingDoubleKeyFrame KeyTime="0" Value="-90">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:1" Value="-84">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:2" Value="-78">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:3" Value="-72">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:4" Value="-66">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:5" Value="-60">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:6" Value="-54">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:7" Value="-48">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:8" Value="-42">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:9" Value="-36">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:10" Value="-30">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:11" Value="-24">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:12" Value="-18">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:13" Value="-12">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:14" Value="-6">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:15" Value="0">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:16" Value="6">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:17" Value="12">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:18" Value="18">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:19" Value="24">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:20" Value="30">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:21" Value="36">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:22" Value="42">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:23" Value="48">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:24" Value="54">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:25" Value="60">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:26" Value="66">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:27" Value="72">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:28" Value="78">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:29" Value="84">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
<EasingDoubleKeyFrame KeyTime="00:00:30" Value="90">
<EasingDoubleKeyFrame.EasingFunction>
<BackEase EasingMode="EaseOut" Amplitude="0.4"/>
</EasingDoubleKeyFrame.EasingFunction>
</EasingDoubleKeyFrame>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Window.Resources>
<Window.Triggers>
<EventTrigger RoutedEvent="FrameworkElement.Loaded">
<BeginStoryboard Storyboard="{StaticResource sbseconds}"/>
</EventTrigger>
</Window.Triggers>
<Grid>
<Border BorderThickness="10" BorderBrush="Black" CornerRadius="300" Width="520" Height="520">
<Grid Height="500" Width="500" HorizontalAlignment="Center" VerticalAlignment="Center">
<Border CornerRadius="350">
<Border.Background>
<ImageBrush ImageSource="Assets/clock.png"/>
</Border.Background>
</Border>
<Border CornerRadius="350" Background="#778889BB"/>
<Border x:Name="hour" CornerRadius="0 15 15 0" Height="10" Width="130" BorderThickness="3" BorderBrush="#FF66B01C" Margin="0,245,120,245" HorizontalAlignment="Right" RenderTransformOrigin="0,0.5">
<Border.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform Angle="-90"/>
<TranslateTransform/>
</TransformGroup>
</Border.RenderTransform>
</Border>
<Border x:Name="minute" CornerRadius="0 15 15 0" Height="5" Width="160" BorderThickness="3" BorderBrush="#FFD15209" Margin="250.5,247,0,248" HorizontalAlignment="Left" RenderTransformOrigin="0,0.5">
<Border.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform Angle="-90"/>
<TranslateTransform/>
</TransformGroup>
</Border.RenderTransform>
</Border>
<Border x:Name="second" CornerRadius="0 15 15 0" Height="3" Width="220" Background="Red" Margin="0,248,30,248" HorizontalAlignment="Right" RenderTransformOrigin="0,0.5">
<Border.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform Angle="-90"/>
<TranslateTransform/>
</TransformGroup>
</Border.RenderTransform>
</Border>
<Ellipse Fill="Black" Width="20" Height="20" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
</Border>
</Grid>
</Window>4.本文参考
Design com WPF 大神的学习视频：1/2 – Creating a clock with Animations
5.代码下载
源码中实现了全部效果，大伙可以直接下载、编译运行，但还是建议看大神视频学习，视频中使用Blend布局时钟、设置动画，类似PS(PhotoShop)，设计界面很是方便的。
