.NET CORE(C#) WPF 值得推荐的动画菜单设计
阅读导航
- 本文背景
- 代码实现
- 本文参考
- 源码
1. 本文背景
YouTube上老外的一个设计，站长觉得不错，分享给大家作为参考，抽屉菜单的动画做的非常不错。
运行起始界面：
站长运行操作一遍，录制了动画大家看看
2. 代码实现
使用 .NET CORE 3.1 创建名为 “AnimatedMenu” 的WPF模板项目，添加1个Nuget库：MaterialDesignThemes，版本为最新预览版3.1.0-ci948。
解决方案主要文件目录组织结构：
- AnimatedMenu
- App.xaml
- MainWindow.xaml
- MainWindow.xaml.cs
2.1 引入样式
文件【App.xaml】，在 StartupUri 中设置启动的视图【MainWindow.xaml】，并在【Application.Resources】节点增加 MaterialDesignThemes库的样式文件：
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Dark.xaml" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.Blue.xaml" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Blue.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
2.2 演示窗体
文件【MainWindow.xaml】，布局代码、动画代码都在此文件中，源码如下：
<Window x:Class="AnimatedMenu.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" MouseLeftButtonDown="MoveWindow_MouseLeftButtonDown"
Height="600" Width="1024" WindowStyle="None" WindowStartupLocation="CenterScreen">
<WindowChrome.WindowChrome>
<WindowChrome CaptionHeight="0"/>
</WindowChrome.WindowChrome>
<Window.Resources>
<Storyboard x:Key="OpenMenu">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="GridMain">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="250"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="GridMain">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="50"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="StackPanelMenu">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="250"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="listViewItem">
<EasingDoubleKeyFrame KeyTime="0" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.7" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="listViewItem1">
<EasingDoubleKeyFrame KeyTime="0" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.9" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="listViewItem2">
<EasingDoubleKeyFrame KeyTime="0" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.1" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="listViewItem3">
<EasingDoubleKeyFrame KeyTime="0" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.3" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="listViewItem4">
<EasingDoubleKeyFrame KeyTime="0" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="-250"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="button">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="1"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)" Storyboard.TargetName="button">
<EasingDoubleKeyFrame KeyTime="0" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:1.5" Value="1"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="CloseMenu">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="GridMain">
<EasingDoubleKeyFrame KeyTime="0" Value="250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="GridMain">
<EasingDoubleKeyFrame KeyTime="0" Value="50"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="StackPanelMenu">
<EasingDoubleKeyFrame KeyTime="0" Value="250"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Window.Resources>
<Window.Triggers>
<EventTrigger RoutedEvent="ButtonBase.Click" SourceName="ButtonOpenMenu">
<BeginStoryboard Storyboard="{StaticResource OpenMenu}"/>
</EventTrigger>
<EventTrigger RoutedEvent="ButtonBase.Click" SourceName="ButtonCloseMenu">
<BeginStoryboard x:Name="CloseMenu_BeginStoryboard" Storyboard="{StaticResource CloseMenu}"/>
</EventTrigger>
</Window.Triggers>
<Grid Background="#FF3580BF">
<StackPanel x:Name="StackPanelMenu" Width="250" HorizontalAlignment="Left" Margin="-250 0 0 0" RenderTransformOrigin="0.5,0.5">
<StackPanel.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</StackPanel.RenderTransform>
<StackPanel Orientation="Horizontal" VerticalAlignment="Top" Height="100" HorizontalAlignment="Center">
<Button Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Background="{x:Null}" BorderBrush="{x:Null}" Padding="0" Width="50" Height="50" Margin="10">
<materialDesign:PackIcon Kind="Settings" Width="40" Height="40"/>
</Button>
<Button x:Name="button" Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" BorderBrush="{x:Null}" Padding="0" Width="80" Height="80" Margin="10" RenderTransformOrigin="0.5,0.5">
<Button.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Button.RenderTransform>
<Button.Background>
<ImageBrush ImageSource="https://img.dotnet9.com/logo.png" Stretch="UniformToFill"/>
</Button.Background>
</Button>
<Button Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Background="{x:Null}" BorderBrush="{x:Null}" Padding="0" Width="50" Height="50" Margin="10">
<materialDesign:PackIcon Kind="InformationOutline" Width="40" Height="40"/>
</Button>
</StackPanel>
<ListView>
<ListViewItem x:Name="listViewItem" Height="60" RenderTransformOrigin="0.5,0.5">
<ListViewItem.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</ListViewItem.RenderTransform>
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Home" Width="30" Height="30" VerticalAlignment="Center" Margin="5"/>
<TextBlock Text="主页" Margin="10" VerticalAlignment="Center"/>
</StackPanel>
</ListViewItem>
<ListViewItem x:Name="listViewItem1" Height="60" RenderTransformOrigin="0.5,0.5">
<ListViewItem.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</ListViewItem.RenderTransform>
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="AccountSearch" Width="30" Height="30" VerticalAlignment="Center" Margin="5"/>
<TextBlock Text="搜索" Margin="10" VerticalAlignment="Center"/>
</StackPanel>
</ListViewItem>
<ListViewItem x:Name="listViewItem2" Height="60" RenderTransformOrigin="0.5,0.5">
<ListViewItem.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</ListViewItem.RenderTransform>
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Wechat" Width="30" Height="30" VerticalAlignment="Center" Margin="5"/>
<TextBlock Text="微信" Margin="10" VerticalAlignment="Center"/>
</StackPanel>
</ListViewItem>
<ListViewItem x:Name="listViewItem3" Height="60" RenderTransformOrigin="0.5,0.5">
<ListViewItem.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</ListViewItem.RenderTransform>
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Qqchat" Width="30" Height="30" VerticalAlignment="Center" Margin="5"/>
<TextBlock Text="QQ" Margin="10" VerticalAlignment="Center"/>
</StackPanel>
</ListViewItem>
<ListViewItem x:Name="listViewItem4" Height="60" RenderTransformOrigin="0.5,0.5">
<ListViewItem.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</ListViewItem.RenderTransform>
<StackPanel Orientation="Horizontal" Margin="10 0">
<materialDesign:PackIcon Kind="Facebook" Width="30" Height="30" VerticalAlignment="Center" Margin="5"/>
<TextBlock Text="脸书" Margin="10" VerticalAlignment="Center"/>
</StackPanel>
</ListViewItem>
</ListView>
</StackPanel>
<Grid x:Name="GridMain" Background="#FFFBFBFB" Width="1024" RenderTransformOrigin="0.5,0.5">
<Grid.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform/>
<RotateTransform/>
<TranslateTransform/>
</TransformGroup>
</Grid.RenderTransform>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="250"/>
</Grid.ColumnDefinitions>
<Grid Grid.Column="1" Background="#FF3580BF">
<Image Height="150" VerticalAlignment="Top" Source="https://dotnet9.com/wp-content/uploads/2017/04/About-Header.jpg" Stretch="UniformToFill"/>
<Ellipse Height="100" Width="100" VerticalAlignment="Top" HorizontalAlignment="Right" Margin="20 100" Stroke="White">
<Ellipse.Fill>
<ImageBrush ImageSource="https://img.dotnet9.com/logo.png" Stretch="UniformToFill"/>
</Ellipse.Fill>
</Ellipse>
<TextBlock Text="Dotnet9" Foreground="White" FontSize="28" FontFamily="Nirmala UI Semilight" Margin="10 100" VerticalAlignment="Top"/>
<StackPanel Margin="0 150">
<Grid Height="60" Margin="20 50 20 0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="30"/>
</Grid.RowDefinitions>
<TextBlock Text="追随者" VerticalAlignment="Bottom" Foreground="#FFFBFBFB" Margin="5,0,5,5"/>
<TextBlock Text="1.5K" VerticalAlignment="Top" Foreground="#FFFBFBFB" Grid.Row="1" Margin="10 0"/>
<TextBlock Text="跟随" VerticalAlignment="Bottom" Foreground="#FFFBFBFB" Margin="5,0,5,5" Grid.Column="1"/>
<TextBlock Text="2.3K" VerticalAlignment="Top" Foreground="#FFFBFBFB" Grid.Row="1" Margin="10 0" Grid.Column="1"/>
</Grid>
<TextBlock TextWrapping="Wrap" Margin="10" Foreground="#FFFBFBFB" FontSize="14">
<Run Text="网名：沙漠尽头的狼"/>
<LineBreak/>
<LineBreak/>
<Run Text="网站：https://dotnet9.com"/>
<LineBreak/>
<Run Text=" Dotnet9的博客 - 一个热衷于互联网分享精神的个人博客站点"/>
<LineBreak/>
<LineBreak/>
<Run Text="座右铭：时间如流水，只能流去不流回。"/>
</TextBlock>
</StackPanel>
</Grid>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="40"/>
<RowDefinition Height="50"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button x:Name="ButtonCloseMenu" Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Width="30" Height="30" Padding="0" Background="{x:Null}" BorderBrush="{x:Null}" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="5" Click="ButtonCloseMenu_Click" Visibility="Collapsed">
<materialDesign:PackIcon Kind="Menu" Foreground="#FF3580BF"/>
</Button>
<Button x:Name="ButtonOpenMenu" Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Width="30" Height="30" Padding="0" Background="{x:Null}" BorderBrush="{x:Null}" VerticalAlignment="Top" HorizontalAlignment="Left" Margin="5" Click="ButtonOpenMenu_Click">
<materialDesign:PackIcon Kind="Menu" Foreground="#FF3580BF"/>
</Button>
<TextBlock Text="照片" Foreground="#FF3580BF" FontSize="30" FontWeight="Bold" Margin="5" Grid.Row="1"/>
<Grid Margin="5" Grid.Row="2" Grid.Column="0">
<Grid.Effect>
<DropShadowEffect BlurRadius="20" Color="#FFEEEEEE" ShadowDepth="1"/>
</Grid.Effect>
<Image Source="https://dotnet9.com/wp-content/uploads/2019/12/wpf.png" Stretch="UniformToFill"/>
<StackPanel Orientation="Horizontal" Margin="5" HorizontalAlignment="Right" VerticalAlignment="Bottom">
<materialDesign:PackIcon Kind="Heart" Foreground="#FFFBFBFB"/>
<TextBlock Text="25" Foreground="#FFFBFBFB"/>
</StackPanel>
</Grid>
<Grid Margin="5" Grid.Row="2" Grid.Column="1">
<Grid.Effect>
<DropShadowEffect BlurRadius="20" Color="#FFEEEEEE" ShadowDepth="1"/>
</Grid.Effect>
<Image Source="https://dotnet9.com/wp-content/uploads/2019/12/winform.png" Stretch="UniformToFill"/>
<StackPanel Orientation="Horizontal" Margin="5" HorizontalAlignment="Right" VerticalAlignment="Bottom">
<materialDesign:PackIcon Kind="Heart" Foreground="#FFFBFBFB"/>
<TextBlock Text="50" Foreground="#FFFBFBFB"/>
</StackPanel>
</Grid>
<Grid Margin="5" Grid.Row="2" Grid.Column="2">
<Grid.Effect>
<DropShadowEffect BlurRadius="20" Color="#FFEEEEEE" ShadowDepth="1"/>
</Grid.Effect>
<Image Source="https://dotnet9.com/wp-content/uploads/2019/12/asp-net-core.png" Stretch="UniformToFill"/>
<StackPanel Orientation="Horizontal" Margin="5" HorizontalAlignment="Right" VerticalAlignment="Bottom">
<materialDesign:PackIcon Kind="Heart" Foreground="#FFFBFBFB"/>
<TextBlock Text="18" Foreground="#FFFBFBFB"/>
</StackPanel>
</Grid>
<Grid Margin="5" Grid.Row="3" Grid.Column="0">
<Grid.Effect>
<DropShadowEffect BlurRadius="20" Color="#FFEEEEEE" ShadowDepth="1"/>
</Grid.Effect>
<Image Source="https://img.dotnet9.com/Xamarin.Forms.png" Stretch="UniformToFill"/>
<StackPanel Orientation="Horizontal" Margin="5" HorizontalAlignment="Right" VerticalAlignment="Bottom">
<materialDesign:PackIcon Kind="Heart" Foreground="#FFFBFBFB"/>
<TextBlock Text="32" Foreground="#FFFBFBFB"/>
</StackPanel>
</Grid>
<Grid Margin="5" Grid.Row="3" Grid.Column="1">
<Grid.Effect>
<DropShadowEffect BlurRadius="20" Color="#FFEEEEEE" ShadowDepth="1"/>
</Grid.Effect>
<Image Source="https://dotnet9.com/wp-content/uploads/2019/12/front-end.png" Stretch="UniformToFill"/>
<StackPanel Orientation="Horizontal" Margin="5" HorizontalAlignment="Right" VerticalAlignment="Bottom">
<materialDesign:PackIcon Kind="Heart" Foreground="#FFFBFBFB"/>
<TextBlock Text="32" Foreground="#FFFBFBFB"/>
</StackPanel>
</Grid>
</Grid>
</Grid>
<StackPanel Orientation="Horizontal" VerticalAlignment="Top" Height="40" HorizontalAlignment="Right" Margin="10">
<Button Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Width="30" Height="30" Padding="0" Background="{x:Null}" BorderBrush="{x:Null}">
<materialDesign:PackIcon Kind="Bell"/>
</Button>
<Button x:Name="ButtonClose" Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Width="30" Height="30" Padding="0" Background="{x:Null}" BorderBrush="{x:Null}" Click="ButtonClose_Click">
<materialDesign:PackIcon Kind="Close"/>
</Button>
</StackPanel>
</Grid>
</Window>
简单说明下：
- "StackPanelMenu" 作为左侧菜单容器，默认是显示在窗体外，距离窗体左边缘-250，点击左上角菜单按钮图标可控制此容器的显示与隐藏，注：菜单开关由两个按钮组成 "ButtonOpenMenu" 和 "ButtonCloseMenu"。
- 左侧菜单项使用 "ListView" 进行布局，实际开发需要运用模板，使用MVVM做成动态菜单，方便扩展。
- 中间的5张演示照片，也和2类似。直接使用Grid进行的布局，实际上都需要做成模板。
- 抽屉菜单动画见 Window.Resouces 中的动画代码，展开抽屉菜单动画是 "OpenMenu"，左侧菜单向右、向下移动，右侧展示区域及个人信息概况界面同时也是向右、向下移动；关闭抽屉菜单动画是 "CloseMenu"，动画移动方向与展开时相反（说的是废话），这段动画代码值得好好学习、复用。
文件【MainWindow.xaml.cs】，后台关闭窗体、抽屉菜单按钮切换、窗体移动等事件处理：
private void ButtonClose_Click(object sender, RoutedEventArgs e)
{
Application.Current.Shutdown();
}
private void ButtonOpenMenu_Click(object sender, RoutedEventArgs e)
{
ButtonOpenMenu.Visibility = Visibility.Collapsed;
ButtonCloseMenu.Visibility = Visibility.Visible;
}
private void ButtonCloseMenu_Click(object sender, RoutedEventArgs e)
{
ButtonOpenMenu.Visibility = Visibility.Visible;
ButtonCloseMenu.Visibility = Visibility.Collapsed;
}
private void MoveWindow_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
DragMove();
}
代码已全部奉上...
3.本文参考
- 视频一：C# WPF Material Design UI: Animated Menu，配套源码：AnimatedMenu1。
- C# WPF开源控件库《MaterialDesignInXAML》
4.源码
效果图实现代码在文中已经全部给出，站长方便演示，文中的图片使用的本站外链图片，代码可直接Copy，按解决方案目录组织代码文件即可运行。
演示Demo下载
时间如流水，只能流去不流回。
