我想动画一个边框像弹出,这将是可见的5秒,然后崩溃。当边框可见时,它只会在5秒内可见,然后崩溃。这将在每次边界可见时重复。我试过了,但只出现过一次。有人能给我解释一下我所犯的错误吗?
这是我已经实现的样式
<Grid.Resources>
<Style x:Key="NotificationStyle" TargetType="{x:Type Border}">
<Style.Triggers>
<Trigger Property="Visibility" Value="Visible">
<Trigger.EnterActions>
<BeginStoryboard x:Name="NotificationStoryBoard">
<Storyboard >
<ObjectAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetProperty="(UIElement.Visibility)">
<DiscreteObjectKeyFrame KeyTime="00:00:00" Value="{x:Static Visibility.Visible}"/>
<DiscreteObjectKeyFrame KeyTime="00:00:05" Value="{x:Static Visibility.Collapsed}"/>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
</Trigger>
</Style.Triggers>
</Style>
</Grid.Resources>
这里是边界…
<Border Name="NotifciationPopUp" Background="White" Height="80" Width="200" BorderBrush="Gray" BorderThickness="1" VerticalAlignment="Bottom" HorizontalAlignment="Left" Visibility="Collapsed" Margin="10,0,0,10" Style="{StaticResource NotificationStyle}">
我意识到可以这样隐藏边框:
风格:
<Style x:Key="NotificationStyle" TargetType="{x:Type Border}">
<Style.Triggers>
<Trigger Property="Visibility" Value="Visible">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Opacity" BeginTime="0:0:0" From="0.0" To="1.0" Duration="0:0:1.0" />
<DoubleAnimation Storyboard.TargetProperty="Opacity" BeginTime="0:0:5" From="1.0" To="0.0" Duration="0:0:1.0" />
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
</Trigger>
</Style.Triggers>
</Style>
网格:
<Grid>
<Border Name="MyBorder" Width="100" Visibility="Hidden" Height="50" BorderThickness="2" BorderBrush="OrangeRed" Style="{StaticResource NotificationStyle}">
<TextBlock Text="Some information" TextAlignment="Center" VerticalAlignment="Center" />
</Border>
<ToggleButton Name="MyButton" Content="Show border" Width="100" Height="30" VerticalAlignment="Bottom" Click="Button_Click" />
</Grid>
在代码:private void Button_Click(object sender, RoutedEventArgs e)
{
if (MyButton.IsChecked == true)
{
MyBorder.Visibility = System.Windows.Visibility.Visible;
}
if (MyButton.IsChecked == false)
{
MyBorder.Visibility = System.Windows.Visibility.Hidden;
}
}
从他的实验中我了解到,如果属性曾经在动画中使用过,那么只能从动画触发器中使用它。因此,我没有收到该物业的访问码。
此外,如果控件使用了Visibility= collapse,那么它就不会收到来自系统的消息,动画将无法工作。虽然属性"隐藏"应该接收消息,但我没有像动画那样工作,所以在示例中我使用不透明度