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WPF实现时钟特效

2020-01-24 01:22:16
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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):

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;namespace WpfClock{ using System.Threading; using System.Windows.Threading; /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window {  //计时器  System.Timers.Timer timer = new System.Timers.Timer(1000);  public MainWindow()  {   InitializeComponent();   #region 初始化时间   secondPointer.Angle = DateTime.Now.Second * 6;   minutePointer.Angle = DateTime.Now.Minute * 6;   hourPointer.Angle = (DateTime.Now.Hour * 30) + (DateTime.Now.Minute * 0.5);   this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");   #endregion   timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);   timer.Enabled = true;  }  private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)  {   //进行拖放移动   this.DragMove();  }  private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)  {   //UI异步更新   this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() =>   {    //秒针转动,秒针绕一圈360度,共60秒,所以1秒转动6度    secondPointer.Angle = DateTime.Now.Second * 6;    //分针转动,分针绕一圈360度,共60分,所以1分转动6度    minutePointer.Angle = DateTime.Now.Minute * 6;    //时针转动,时针绕一圈360度,共12时,所以1时转动30度。    //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)    hourPointer.Angle = (DateTime.Now.Hour * 30)+ (DateTime.Now.Minute * 0.5);    //更新时间值    this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");   }));  } }}

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

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;namespace WpfClock{ using System.Threading; using System.Windows.Threading; /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window {  //计时器  System.Timers.Timer timer = new System.Timers.Timer(1000);  public MainWindow()  {   InitializeComponent();   #region 初始化时间   secondPointer.Angle = DateTime.Now.Second * 6;   minutePointer.Angle = DateTime.Now.Minute * 6;   hourPointer.Angle = (DateTime.Now.Hour * 30) + (DateTime.Now.Minute * 0.5);   this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");   #endregion   timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);   timer.Enabled = true;  }  private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)  {   //进行拖放移动   this.DragMove();  }  private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)  {   //UI异步更新   this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() =>   {    //秒针转动,秒针绕一圈360度,共60秒,所以1秒转动6度    secondPointer.Angle = DateTime.Now.Second * 6;    //分针转动,分针绕一圈360度,共60分,所以1分转动6度    minutePointer.Angle = DateTime.Now.Minute * 6;    //时针转动,时针绕一圈360度,共12时,所以1时转动30度。    //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)    hourPointer.Angle = (DateTime.Now.Hour * 30)+ (DateTime.Now.Minute * 0.5);    //更新时间值    this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");   }));  } }}

4、编译运行,如果运气不错的话,应该能显示如下效果:

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>

以上就是WPF技术实现时钟的效果,小编的水平有限,如果有错误的地方请大家谅解,大家共同进步。

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