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今天来点实际的,项目中可以真实使用的,一个Loading的动画,最后封装成一个控件,可以直接使用在项目中,先上图:
整个设计比较简单,就是在界面上画18个Path,然后通过动画改变OpacityMask的值来实现一种动态的效果.
因为整个过程比较简单,所以其实没有用到Blend,唯一一个需要注意的是Path的路径值是请美工从PS里生成的,路径如下:
<Geometry x:Key="Block"> M291.15499,85.897525 C291.15499,85.897525 301.88917,85.87921 301.88917,85.87921 301.88917,85.87921 300.38339,94.355061 300.38339,94.355061 300.38339,94.355061 292.85366,94.355042 292.85366,94.355042 292.85366,94.355042 291.15499,85.897525 291.15499,85.897525Z </Geometry>
Path的代码如下,每个Path一次旋转特定的角度围成一个圆形
<Path x:Name="block0" Style="{StaticResource PathStyle}" Data="{StaticResource Block}" OpacityMask="#00000000" > <Path.RenderTransform> <RotateTransform Angle="180"/> </Path.RenderTransform> </Path>
<Style x:Key="PathStyle" TargetType="Path"> <Setter Property="Fill" Value="#FF0092FF"></Setter> <Setter Property="Stretch" Value="Fill"></Setter> <Setter Property="RenderTransformOrigin" Value="0.5,5"></Setter> <Setter Property="VerticalAlignment" Value="Top"></Setter> <Setter Property="Height" Value="30"></Setter> </Style>
单个Path的动画:
<ColorAnimationUsingKeyFrames Duration="00:00:03.6" Storyboard.TargetName="block0" Storyboard.TargetProperty="(UIElement.OpacityMask).(SolidColorBrush.Color)"> <LinearColorKeyFrame KeyTime="00:00:00.0" Value="#FF000000"/> <LinearColorKeyFrame KeyTime="00:00:00.2" Value="#EF000000"/> <LinearColorKeyFrame KeyTime="00:00:00.4" Value="#E2000000"/> <LinearColorKeyFrame KeyTime="00:00:00.6" Value="#D3000000"/> <LinearColorKeyFrame KeyTime="00:00:00.8" Value="#C6000000"/> <LinearColorKeyFrame KeyTime="00:00:01.0" Value="#B7000000"/> <LinearColorKeyFrame KeyTime="00:00:01.2" Value="#AA000000"/> <LinearColorKeyFrame KeyTime="00:00:01.4" Value="#9B000000"/> <LinearColorKeyFrame KeyTime="00:00:01.6" Value="#8E000000"/> <LinearColorKeyFrame KeyTime="00:00:01.8" Value="#7F000000"/> <LinearColorKeyFrame KeyTime="00:00:02.0" Value="#72000000"/> <LinearColorKeyFrame KeyTime="00:00:02.2" Value="#63000000"/> <LinearColorKeyFrame KeyTime="00:00:02.4" Value="#56000000"/> <LinearColorKeyFrame KeyTime="00:00:02.6" Value="#3D000000"/> <LinearColorKeyFrame KeyTime="00:00:02.8" Value="#26000000"/> <LinearColorKeyFrame KeyTime="00:00:03.0" Value="#19000000"/> <LinearColorKeyFrame KeyTime="00:00:03.2" Value="#0C000000"/> <LinearColorKeyFrame KeyTime="00:00:03.4" Value="#00000000"/> <LinearColorKeyFrame KeyTime="00:00:03.6" Value="#FF000000"/> </ColorAnimationUsingKeyFrames>
源代码下载:
http://files.cnblogs.com/youngytj/LoadingAnimations.rar
WPF和Expression Blend开发实例:Loading动画
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原文地址：http://www.cnblogs.com/youngytj/p/4129365.html
