WPF实现时钟特效

时间:2021-07-11 12:09:34

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。

WPF实现时钟特效

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
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
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:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
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:

WPF实现时钟特效

总结

wpf可以用rotatetransform中的angle进行旋转,可以指定中心点(centerx,centery)

?
1
2
3
<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。