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WPF實(shí)現(xiàn)時(shí)鐘特效

 更新時(shí)間:2015年11月25日 09:58:40   作者:JackWang-CUMT  
這篇文章主要介紹了WPF實(shí)現(xiàn)時(shí)鐘特效,過(guò)程很簡(jiǎn)單,感興趣的小伙伴們可以參考一下

WPF在樣式定義和UI動(dòng)畫上面相對(duì)于以前的技術(shù)有了不少的提升,下面給出WPF技術(shù)實(shí)現(xiàn)鐘表的效果:

1、Visual Studio新建一個(gè)WPF應(yīng)用程序,命名為WpfClock,新建一個(gè)images文件夾,并準(zhǔn)備一個(gè)鐘表的背景圖片和程序圖標(biāo)素材。

2、編輯MainWindow.xaml文件,對(duì)UI進(jìn)行定制,代碼如下(指針都是用Rectangle實(shí)現(xiàn)的,當(dāng)然可以用圖片代替):

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 的交互邏輯
 /// </summary>
 public partial class MainWindow : Window
 {
  //計(jì)時(shí)器
  System.Timers.Timer timer = new System.Timers.Timer(1000);
  public MainWindow()
  {
   InitializeComponent();
   #region 初始化時(shí)間
   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)
  {
   //進(jìn)行拖放移動(dòng)
   this.DragMove();
  }
  private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
  {
   //UI異步更新
   this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() =>
   {
    //秒針轉(zhuǎn)動(dòng),秒針繞一圈360度,共60秒,所以1秒轉(zhuǎn)動(dòng)6度
    secondPointer.Angle = DateTime.Now.Second * 6;
    //分針轉(zhuǎn)動(dòng),分針繞一圈360度,共60分,所以1分轉(zhuǎn)動(dòng)6度
    minutePointer.Angle = DateTime.Now.Minute * 6;
    //時(shí)針轉(zhuǎn)動(dòng),時(shí)針繞一圈360度,共12時(shí),所以1時(shí)轉(zhuǎn)動(dòng)30度。
    //另外同一個(gè)小時(shí)內(nèi),隨著分鐘數(shù)的變化(繞一圈60分鐘),時(shí)針也在緩慢變化(轉(zhuǎn)動(dòng)30度,30/60=0.5)
    hourPointer.Angle = (DateTime.Now.Hour * 30)+ (DateTime.Now.Minute * 0.5);
    //更新時(shí)間值
    this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");
   }));
  }

 }
}

3、編輯MainWindow.xaml.CS文件,對(duì)后臺(tái)邏輯進(jìn)行定制,代碼如下:

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 的交互邏輯
 /// </summary>
 public partial class MainWindow : Window
 {
  //計(jì)時(shí)器
  System.Timers.Timer timer = new System.Timers.Timer(1000);
  public MainWindow()
  {
   InitializeComponent();
   #region 初始化時(shí)間
   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)
  {
   //進(jìn)行拖放移動(dòng)
   this.DragMove();
  }
  private void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
  {
   //UI異步更新
   this.Dispatcher.Invoke(DispatcherPriority.Normal, (Action)(() =>
   {
    //秒針轉(zhuǎn)動(dòng),秒針繞一圈360度,共60秒,所以1秒轉(zhuǎn)動(dòng)6度
    secondPointer.Angle = DateTime.Now.Second * 6;
    //分針轉(zhuǎn)動(dòng),分針繞一圈360度,共60分,所以1分轉(zhuǎn)動(dòng)6度
    minutePointer.Angle = DateTime.Now.Minute * 6;
    //時(shí)針轉(zhuǎn)動(dòng),時(shí)針繞一圈360度,共12時(shí),所以1時(shí)轉(zhuǎn)動(dòng)30度。
    //另外同一個(gè)小時(shí)內(nèi),隨著分鐘數(shù)的變化(繞一圈60分鐘),時(shí)針也在緩慢變化(轉(zhuǎn)動(dòng)30度,30/60=0.5)
    hourPointer.Angle = (DateTime.Now.Hour * 30)+ (DateTime.Now.Minute * 0.5);
    //更新時(shí)間值
    this.labTime.Content = DateTime.Now.ToString("HH:mm:ss");
   }));
  }

 }
}

4、編譯運(yùn)行,如果運(yùn)氣不錯(cuò)的話,應(yīng)該能顯示如下效果:

總結(jié)

WPF可以用RotateTransform中的Angle進(jìn)行旋轉(zhuǎn),可以指定中心點(diǎn)(CenterX,CenterY)

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

以上就是WPF技術(shù)實(shí)現(xiàn)時(shí)鐘的效果,小編的水平有限,如果有錯(cuò)誤的地方請(qǐng)大家諒解,大家共同進(jìn)步。

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