WPF动画性能随着时间的推移而下降

本文关键字：时间 动画 性能 WPF | 更新日期: 2023-09-27 18:11:01

我有两个动画:

    <Storyboard x:Key="ChangeLayout">
        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(Canvas.Left)" Storyboard.TargetName="currentContent">
            <EasingDoubleKeyFrame KeyTime="0:0:0.0" Value="900"/>
            <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="0">
                <EasingDoubleKeyFrame.EasingFunction>
                    <CircleEase EasingMode="EaseInOut"/>
                </EasingDoubleKeyFrame.EasingFunction>
            </EasingDoubleKeyFrame>
        </DoubleAnimationUsingKeyFrames>
    </Storyboard>
    <Storyboard x:Key="HideLayout">
        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(Canvas.Left)" Storyboard.TargetName="currentContent">
            <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="-900">
                <EasingDoubleKeyFrame.EasingFunction>
                    <CircleEase EasingMode="EaseInOut"/>
                </EasingDoubleKeyFrame.EasingFunction>
            </EasingDoubleKeyFrame>
        </DoubleAnimationUsingKeyFrames>
    </Storyboard>

和它们开头的代码:

private void btnUser_Click(object sender, RoutedEventArgs e)
    {
        if (currentContent.Content != null)
            if (currentContent.Content.GetType() == typeof(Layouts.User))
                return;
        ((hl.Children[0] as DoubleAnimationUsingKeyFrames).KeyFrames[0] as EasingDoubleKeyFrame).Value = -this.ActualWidth;
        hl.Completed += (_sender, _e) =>
        {
            currentContent.Content = new Layouts.User();
            cl.Completed += (ssender, ee) =>
                {
                    btnMusic.Opacity = 0.5;
                    btnUser.Opacity = 0.9;
                };
            cl.Begin();
        };
        hl.Begin();
    }
    private void btnMusic_Click(object sender, RoutedEventArgs e)
    {
        if (currentContent.Content != null)
            if (currentContent.Content.GetType() == typeof(Layouts.Music))
                return;
        ((hl.Children[0] as DoubleAnimationUsingKeyFrames).KeyFrames[0] as EasingDoubleKeyFrame).Value = -this.ActualWidth;
        hl.Completed += (_sender, _e) =>
            {
                if (Layouts.Music.CurrentMusic == null)
                {
                    Layouts.Music.CurrentMusic = new Layouts.Music();
                    Layouts.Music.CurrentMusic.GetMusic();
                }
                currentContent.Content = Layouts.Music.CurrentMusic;
                cl.Completed += (ssender, ee) =>
                    {
                        btnUser.Opacity = 0.5;
                        btnMusic.Opacity = 0.8;
                    };
                cl.Begin();
            };
        hl.Begin();
    }

在用户和音乐内容之间进行几次切换后，ChangeLayout动画开始很慢很慢，并且根据WPF Performance Suite FPS动画切换后从500 +下降到最大4eh…找不到任何解决办法=

对不起我的英语，我一直在学习。

WPF动画性能随着时间的推移而下降

你是在每次点击按钮时添加事件处理程序，而不是删除它们。

hl.Completed += (_sender, _e) =>
{
};

在两个按钮处理程序中。这不仅会消耗资源，而且意味着每次点击按钮都要多次调用代码。

解决方案是将处理程序设置移到按钮单击之外，或者在完成后删除处理程序。在后一种情况下，您必须将事件处理程序代码移动到一个单独的方法中，以便您可以这样做: 
hl.Completed += MyEventHandler;

: 

private void MyEventHandler(object sender, EventArgs e)
{
    // Do stuff
    hl.Completed -= MyEventHandler;
}

虽然这意味着hl必须对两个方法都可见

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