我在窗口中有一个矩形和一个按钮,每次我点击按钮我想用动画旋转60度的矩形,我的问题是每次我点击按钮它都会恢复到一个角度0.如何保持动画的结束状态,以便在第一次点击时从0到60度,在第二次点击时从60到120,等等......?
这是我到目前为止所拥有的...... XAML:
<Grid>
<StackPanel>
<Border BorderBrush="White" BorderThickness="1" HorizontalAlignment="Center" VerticalAlignment="Center">
<Rectangle Width="100" Height="100" x:Name="rect" RenderTransformOrigin=".5,.5" Fill="Red"/>
</Border>
<Button Width="100" Height="100" Click="Button_Click">Rotate</Button>
</StackPanel>
</Grid>
代码背后......
private void Button_Click(object sender, RoutedEventArgs e)
{
DoubleAnimation d2 = new DoubleAnimation(60, new Duration(TimeSpan.FromSeconds(0.3)), FillBehavior.HoldEnd);
RotateTransform rt = new RotateTransform();
rect.RenderTransform = rt;
d2.Completed += (s, eArgs) => rect.RenderTransform = new RotateTransform(60);
rt.BeginAnimation(RotateTransform.AngleProperty, d2);
}
答案 0 :(得分:1)
您应该重用XAML中定义的RotateTransform,例如
<Rectangle RenderTransformOrigin="0.5,0.5" ...>
<Rectangle.RenderTransform>
<RotateTransform x:Name="transform"/>
</Rectangle.RenderTransform>
</Rectangle>
并通过设置其By
属性来运行动画:
transform.BeginAnimation(RotateTransform.AngleProperty,
new DoubleAnimation
{
By = 60d,
Duration = TimeSpan.FromSeconds(0.3)
});