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)：
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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：
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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)
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<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。
