我如何使用(WPF窗口内)只有C#代码创建图像对象上的旋转动画(How do I create a

2019-06-25 13:35发布

我有一对夫妇的与同一类的事情悬而未决的问题,

我很新的WPF,但与C#和WinForms经历。

我环顾四周的interweb的工作的例子,但还没有找到一个工程。

我想实现的是在C#函数创建以下

  • 创建的图像(图像1)
  • 创建的图像(图像2)
  • 把图像通过侧车窗侧
  • 创建一个故事板
  • 动画图像1的从0到360的旋转属性(动画1)
  • 从全动画图像2的不透明度属性为不可见(animation2)
  • 故事板应十秒动画1运行开始0秒和动画2开始5秒时

道歉代码明确要求,但是,我已经看过,并试图,我刚才的问题有这样的执行完整的代码,但没有动画显示(以下链接)

如何创建故事板并使用C#代码在WPF旋转图像

提前致谢

和。

Answer 1:

这是一个工作XAML versionn你的问题,然后在C#中相同的事情。 可能不是你是什么之后,但它应该说明它。

XAML版本:

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <Storyboard x:Key="Storyboard" BeginTime="00:00:00.000" Duration="00:00:10.000">
            <DoubleAnimation Storyboard.TargetName="RotateImage" 
                             Storyboard.TargetProperty="(UIElement.RenderTransform).(RotateTransform.Angle)" 
                             From="0" To="360" BeginTime="00:00:05.000" Duration="00:00:05.000" />
            <DoubleAnimation Storyboard.TargetName="OpacityImage" 
                             Storyboard.TargetProperty="Opacity" 
                             From="1" To="0" Duration="00:00:10.000" />
        </Storyboard>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition />
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <Image x:Name="RotateImage" Stretch="Uniform" Source="Chrysanthemum.jpg">
            <Image.RenderTransform>
                <RotateTransform Angle="0" />
            </Image.RenderTransform>
        </Image>
        <Image x:Name="OpacityImage" Grid.Column="1" Stretch="Uniform" Source="Desert.jpg" />
        <Button Grid.Row="1" Grid.ColumnSpan="2" Content="Start">
            <Button.Triggers>
                <EventTrigger RoutedEvent="Button.Click">
                    <BeginStoryboard Storyboard="{StaticResource Storyboard}" />
                </EventTrigger>
            </Button.Triggers>
        </Button>
    </Grid>
</Window>

和C#版本:

    public MainWindow()
    {
        InitializeComponent();

        Image rotateImage = new Image()
        {
            Stretch = Stretch.Uniform,
            Source = new BitmapImage(new Uri("pack://application:,,,/Chrysanthemum.jpg")),
            RenderTransform = new RotateTransform()
        };
        Image opacityImage = new Image()
        {
            Stretch = Stretch.Uniform,
            Source = new BitmapImage(new Uri("pack://application:,,,/Desert.jpg"))
        };

        LayoutRoot.Children.Add(rotateImage);
        LayoutRoot.Children.Add(opacityImage);

        Grid.SetColumn(opacityImage, 1);

        Storyboard storyboard = new Storyboard();
        storyboard.Duration = new Duration(TimeSpan.FromSeconds(10.0));
        DoubleAnimation rotateAnimation = new DoubleAnimation()
        {
            From = 0,
            To = 360,
            Duration = storyboard.Duration
        };
        DoubleAnimation opacityAnimation = new DoubleAnimation()
        {
            From = 1.0,
            To = 0.0,
            BeginTime = TimeSpan.FromSeconds(5.0),
            Duration = new Duration(TimeSpan.FromSeconds(5.0))
        };

        Storyboard.SetTarget(rotateAnimation, rotateImage);
        Storyboard.SetTargetProperty(rotateAnimation, new PropertyPath("(UIElement.RenderTransform).(RotateTransform.Angle)"));
        Storyboard.SetTarget(opacityAnimation, opacityImage);
        Storyboard.SetTargetProperty(opacityAnimation, new PropertyPath("Opacity"));

        storyboard.Children.Add(rotateAnimation);
        storyboard.Children.Add(opacityAnimation);

        Resources.Add("Storyboard", storyboard);

        Button button = new Button()
        {
            Content = "Begin"
        };
        button.Click += button_Click;

        Grid.SetRow(button, 1);
        Grid.SetColumnSpan(button, 2);

        LayoutRoot.Children.Add(button);
    }

    void button_Click(object sender, RoutedEventArgs e)
    {
        ((Storyboard)Resources["Storyboard"]).Begin();
    }


Answer 2:

动画是如下工作。

1-该程序创建一个定时器。

2-程序将检查以设定的间隔定时器,看看有多少时间已过。

3-每次程序检查计时器,它计算用于矩形当前不透明度值基于多少时间已过。

4,然后程序更新与新价值的矩形,并重绘。

以下是创建矩形和动画它的代码。

<Window x:Class="Animation.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Animated Rectangle" Height="350" Width="525">
<Grid>
    <StackPanel Margin="10">
        <Image Name="MyImage" Source="e:\a.jpg" Width="100" Margin="50" ></Image>
        <Rectangle
            Name="MyRectangle"
            Width="100" 
            Height="100"
            Fill="Blue">

            <Rectangle.Triggers>
                <!-- Animates the rectangle's opacity. -->
                <EventTrigger RoutedEvent="Rectangle.Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation
                                Storyboard.TargetName="MyImage" 
                                Storyboard.TargetProperty="Opacity"
                                From="1.0" To="0.0" Duration="0:0:3" 
                                AutoReverse="True" RepeatBehavior="Forever" />
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Rectangle.Triggers>
        </Rectangle>
    </StackPanel>
</Grid>



文章来源: How do I create a rotate animation on an image object using c# code only (inside a WPF window)