代码创建 WPF 旋转翻转动画（汇总）

Posted 2021-03-16 lonelyxmas

原文:代码创建 WPF 旋转、翻转动画（汇总）

先建立一个button

        <Button  Width="80" Height="60" Content="旋转" Name="trans" Click="trans_Click"  Style="{x:Null}"/>

方法一：绕左上角旋转

 public void Transform1()
        {
            RotateTransform rtf = new RotateTransform();
            trans.RenderTransform = rtf;
            DoubleAnimation dbAscending = new DoubleAnimation(0, 360, new Duration

            (TimeSpan.FromSeconds(1)));
            dbAscending.RepeatBehavior = RepeatBehavior.Forever;
            rtf.BeginAnimation(RotateTransform.AngleProperty, dbAscending);
        }

方法二：绕左上角旋转

public void Transform2()
        {
            RotateTransform rtf = new RotateTransform();
            trans.RenderTransform = rtf;
            DoubleAnimation dbAscending = new DoubleAnimation(0, 360, new Duration(TimeSpan.FromSeconds(1)));
            Storyboard storyboard = new Storyboard();
            dbAscending.RepeatBehavior = RepeatBehavior.Forever;
            storyboard.Children.Add(dbAscending);
            Storyboard.SetTarget(dbAscending, trans);
            Storyboard.SetTargetProperty(dbAscending, new PropertyPath("RenderTransform.Angle"));
            storyboard.Begin();
        }

效果如下：

截图不怎么能看出效果，这两种方法是按某个角进行旋转的。

方法三：Xaml动画，绕X中线或者Y中线翻转

<Window x:Class="Oland.HSS.InHospital.Window2"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Window2" Height="300" Width="300">
    <Window.Resources>
        <Storyboard x:Key="LoadHeadStoryboard" >
            <DoubleAnimationUsingKeyFrames BeginTime="0:0:0" Duration="0:0:5"
                                           RepeatBehavior="Forever"
                                           Storyboard.TargetName="DesignerHead"
                                           Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
                <SplineDoubleKeyFrame   Value="1"/>
                <SplineDoubleKeyFrame    Value="-1"/>
                <SplineDoubleKeyFrame    Value="1"/>
            </DoubleAnimationUsingKeyFrames>

        </Storyboard>
    </Window.Resources>
    <Window.Triggers>
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Storyboard="{StaticResource LoadHeadStoryboard}"/>
        </EventTrigger>
    </Window.Triggers>
    <Grid>
        <Button  Content="旋转" x:Name="DesignerHead"  Height="40" Width="60" RenderTransformOrigin="0.4,0.5"  Style="{x:Null}">
            <Button.RenderTransform>
                <TransformGroup>
                    <ScaleTransform ScaleX="1" ScaleY="1"></ScaleTransform>
                </TransformGroup>
            </Button.RenderTransform>
        </Button>
    </Grid>
</Window>

可设置是延X中线或者是Y中线旋转，上边那种是按左上角旋转。

 

方法四：第一种方式使用Xaml实现（左上）

<Button Content="旋转" Height="32" HorizontalAlignment="Left" Margin="106,176,0,0" Name="button1" VerticalAlignment="Top" Width="58" >
            <Button.RenderTransform>
                <RotateTransform x:Name="trans" Angle="0"/>
            </Button.RenderTransform>
            <Button.Triggers>
                <EventTrigger RoutedEvent="Button.Click">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation To="360" RepeatBehavior="Forever" Duration="0:0:3"
                                             Storyboard.TargetName="trans"
                                             Storyboard.TargetProperty="Angle"/>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Button.Triggers>
        </Button>

效果同第一第二种方法

方法五：绕中点旋转：

 <Button Content="旋转" Height="32" HorizontalAlignment="Left" Margin="106,176,0,0" Name="button1" VerticalAlignment="Top" Width="58" RenderTransformOrigin="0.5,0.5">
            <Button.RenderTransform>
                <RotateTransform x:Name="trans" Angle="0"/>
            </Button.RenderTransform>
            <Button.Triggers>
                <EventTrigger RoutedEvent="Button.Click">
                    <BeginStoryboard >
                        <Storyboard>
                            <DoubleAnimation From="0" To="360" RepeatBehavior="Forever" Duration="0:0:3"
                                             Storyboard.TargetName="trans"
                                             Storyboard.TargetProperty="Angle"/>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Button.Triggers>
        </Button>

这段代码和上面差不多，

关键是RenderTransformOrigin，设成0.5,0.5就可以了

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