WPF钟表效果实现

WPF在样式定义和UI动画上面相对于以前的技术有了不少的提升，下面给出WPF技术实现钟表的效果：

1、Visual Studio新建一个WPF应用程序，命名为WpfClock，新建一个images文件夹，并准备一个钟表的背景图片和程序图标素材。

2、编辑MainWindow.xaml文件，对UI进行定制，代码如下(指针都是用Rectangle实现的，当然可以用图片代替)：

 1 <Window x:Class="WpfClock.MainWindow" 2     ="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 3     ="http://schemas.microsoft.com/winfx/2006/xaml" 4     Title="MainWindow" Margin="2" Height="327" Width="311" AllowsTransparency="True"  5     WindowStyle="None" Background="Transparent" WindowStartupLocation="CenterScreen"  6     Icon="images/clock.ico"  7     ResizeMode="NoResize" Topmost="False" Opacity="1"> 8     <Grid Width="300" Height="300" MouseLeftButtonDown="Grid_MouseLeftButtonDown"> 9     <Image Source="images/backGround.png"></Image>10 11     <Label Name="lab商标" Foreground="White" Margin="0,0,0,211" HorizontalAlignment="Center" VerticalAlignment="Bottom" Height="Auto" Width="Auto" FontSize="13" >JackMoon</Label>12     <Label Name="lab创建时间" Foreground="White" Margin="0,91,0,0" HorizontalAlignment="Center" VerticalAlignment="Top" Height="Auto" Width="Auto">1987</Label>13 14     <!-- 秒针定义 -->15     <Rectangle Margin="150,0,149,150" Name="rectangleSecond" Stroke="White" Height="120" VerticalAlignment="Bottom" Width="1">16       <Rectangle.RenderTransform>17         <RotateTransform x:Name="secondPointer" CenterX="0" CenterY="120" Angle="0" />18       </Rectangle.RenderTransform>19     </Rectangle>20     <!-- -->21 22     <!-- 分钟定义 -->23     <Rectangle Margin="150,49,149,151" Name="rectangleMinute" Stroke="LightGreen" Width="1">24       <Rectangle.RenderTransform>25         <RotateTransform x:Name="minutePointer" CenterX="0" CenterY="100" Angle="45" />26       </Rectangle.RenderTransform>27     </Rectangle>28     <!-- -->29 30     <!-- 时针定义 -->31     <Rectangle Margin="150,80,149,150" Name="rectangleHour" Stroke="LightYellow" Width="1">32       <Rectangle.RenderTransform>33         <RotateTransform x:Name="hourPointer" CenterX="0" CenterY="70" Angle="90" />34       </Rectangle.RenderTransform>35     </Rectangle>36     <!---->37     <Label Content="08:08:08" FontSize="16" Foreground="White" Height="Auto" HorizontalAlignment="Center" Margin="114,0,113,86" Name="labTime" VerticalAlignment="Bottom" Width="Auto" />38 39   </Grid>40 </Window>

3、编辑MainWindow.xaml.CS文件，对后台逻辑进行定制，代码如下：

 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Windows; 6 using System.Windows.Controls; 7 using System.Windows.Data; 8 using System.Windows.Documents; 9 using System.Windows.Input;10 using System.Windows.Media;11 using System.Windows.Media.Imaging;12 using System.Windows.Navigation;13 using System.Windows.Shapes;14 namespace WpfClock15 {16   using System.Threading;17   using System.Windows.Threading;18   /// <summary>19   /// MainWindow.xaml 的交互逻辑20   /// </summary>21   public partial class MainWindow : Window22   {23     //计时器24     System.Timers.Timer timer = new System.Timers.Timer(1000);25     public MainWindow()26     {27       InitializeComponent();28       #region 初始化时间29       secondPointer.Angle = DateTime.Now.Second * 6;30       minutePointer.Angle = DateTime.Now.Minute * 6;31       hourPointer.Angle = (DateTime.Now.Hour * 30) + (DateTime.Now.Minute * 0.5);32       this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");33       #endregion34       timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);35       timer.Enabled = true;36     }37 38     private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)39     {40       //进行拖放移动41       this.DragMove();42     }43    private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)44     {45      //UI异步更新46       this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() =>47       {48         //秒针转动,秒针绕一圈360度，共60秒，所以1秒转动6度49         secondPointer.Angle = DateTime.Now.Second * 6;50         //分针转动,分针绕一圈360度，共60分，所以1分转动6度51         minutePointer.Angle = DateTime.Now.Minute * 6;52         //时针转动,时针绕一圈360度，共12时，所以1时转动30度。53         //另外同一个小时内，随着分钟数的变化(绕一圈60分钟），时针也在缓慢变化（转动30度，30/60=0.5)54         hourPointer.Angle = (DateTime.Now.Hour * 30)+ (DateTime.Now.Minute * 0.5);55         //更新时间值56         this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");57       }));58     }59 60   }61 }

4、编译运行，如果运气不错的话，应该能显示如下效果：

5、总结

WPF可以用RotateTransform中的Angle进行旋转，可以指定中心点（CenterX,CenterY)

 <Rectangle.RenderTransform>    <RotateTransform x:Name="hourPointer" CenterX="0" CenterY="70" Angle="90" /> </Rectangle.RenderTransform>

原标题：WPF钟表效果实现

关键词：wpf