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Question

我有一个有两行的网格，我需要在第二行放置一些超出网格限制的按钮，如下图所示：

问题是按钮正在切割。我怎么能像图像一样？

以下是我当前代码的示例：

<Grid Height="300" Margin="5, 0, 5, 0">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="30" />
        </Grid.RowDefinitions>
        <Grid Grid.Row="0" Grid.ColumnSpan="3">
            <Grid.Background>
                <ImageBrush Stretch="Fill" ImageSource="Assets/back_help.png"/>
            </Grid.Background>
            <Canvas Margin="30, 30, 30,0" Grid.ColumnSpan="3" >
                <TextBlock TextWrapping="Wrap" Text="TextBlock" x:Uid="MainPageHelpText" FontFamily="Assets/Fonts/chalkboard-bold.ttf#Chalkboard" FontSize="26" Foreground="White" Width="338" Height="218" TextAlignment="Center">
                    <TextBlock.RenderTransform>
                        <TranslateTransform
                    X="2"
                    Y="2" />
                    </TextBlock.RenderTransform>
                </TextBlock>
                <TextBlock TextWrapping="Wrap" Text="TextBlock" x:Uid="MainPageHelpText" FontFamily="Assets/Fonts/chalkboard-bold.ttf#Chalkboard" FontSize="26" Foreground="#af7f46" Width="340" Height="220" TextAlignment="Center">

                </TextBlock>
            </Canvas>

        </Grid>
        <Button Grid.Column="0" Grid.Row="1" Width="60" Height="60" VerticalAlignment="Bottom" BorderThickness="0" >
            <Image Source="Assets/ic_leaderboard.png" Width="60" Height="60" Margin="0,-18, 0,0" />
        </Button>
        <Button Grid.Column="1" Grid.Row="1" Width="60" Height="60" Margin="0, -30, 0, 0" BorderThickness="0" >
            <Image Source="Assets/ic_play.png" Width="70" Height="70" Margin="0,-29, 0,0" />
        </Button>
        <Button Grid.Column="2" Grid.Row="1" Width="60" Height="60" Margin="0, -30, 0, 0" BorderThickness="0" >
            <Image Source="Assets/ic_achievements.png" Width="60" Height="60" Margin="0,-18, 0,0" />
        </Button>
    </Grid>