c# - WpfAnimatedGif 不要停留在特定的框架中

Question

我正在尝试使用 WpfAnimatedGif 使动画从特定帧开始

具体帧数是13 gif有30帧

(当动画播放时，我希望它从头开始播放，然后返回到第 13 帧)

第 13 帧像缩略图一样，当我悬停 gif 时，gif 开始播放，之后，它返回到第 13 帧并像缩略图一样

( Their Git Page , Their documentation page )

XAML:

<Image Name="MinimizeGIF" gif:ImageBehavior.AutoStart="False" gif:ImageBehavior.RepeatBehavior="3x" gif:ImageBehavior.AnimatedSource="/Media/arrow_bottom1.gif" MouseEnter="MinimizeGIF_MouseEnter" Height="58.262" Margin="460.674,60.801,68.004,0" VerticalAlignment="Top" Width="71.321" MouseDown="MinimizeGIF_MouseDown" MouseLeave="MinimizeGIF_MouseLeave" RenderTransformOrigin="0.5,0.5" Loaded="MinimizeGIF_Loaded">
    <Image.RenderTransform>
        <TransformGroup>
            <ScaleTransform/>
            <SkewTransform/>
            <RotateTransform Angle="180"/>
            <TranslateTransform/>
        </TransformGroup>
    </Image.RenderTransform>
</Image>

C#代码:

private void MinimizeGIF_Loaded(object sender, RoutedEventArgs e)
{
    var image = new BitmapImage();
    image.BeginInit();
    image.UriSource = new Uri(@"C:\Users\Me\Documents\Visual Studio 2017\Projects\Counting\Counting\arrow_bottom1.gif");
    image.EndInit();
    ImageBehavior.SetAnimatedSource(MinimizeGIF, image);
    var controller = ImageBehavior.GetAnimationController(MinimizeGIF);
    controller.GotoFrame(13); // It Goes to The Frame
    MessageBox.Show(controller.CurrentFrame.ToString());  // Just for the function to stop and after that the gif return to frame 0
}

在 MessageBox.Show(controller.CurrentFrame.ToString()); 它显示 -1

有人可以帮助我吗？

Answer 1

1. 在图像中获取你想要的特定帧
2. 用这张图片创建一个按钮
3. 悬停按钮时更改 btn1.Visibility = System.Windows.Visibility.Hidden; 并从头开始 gif
4. 离开按钮时，更改为 btn1.Visibility = System.Windows.Visibility.Visible;