UWP中WinUI 2.4 TeachingTip控件内容居中及隐藏关闭图标问题

没问题，这两个需求都能轻松实现，我一步步给你拆解：

1. 让内容居中显示 #

你之前只给TextBlock设置了对齐，但TeachingTip的内容容器默认不会自动继承这个对齐逻辑。最简单的办法是直接给TeachingTip添加HorizontalContentAlignment="Center"和VerticalContentAlignment="Center"属性，这样内部内容就会自动居中。当然也可以把TextBlock嵌套在Grid里，利用Grid的布局特性实现居中，两种方式都可行，给你贴个完整示例：

<winui:TeachingTip x:Name="ToggleThemeTeachingTip2" 
                   IsOpen="True" 
                   PreferredPlacement="Bottom" 
                   PlacementMargin="30" 
                   Background="Green" 
                   Foreground="White"
                   HorizontalContentAlignment="Center"
                   VerticalContentAlignment="Center">
    <winui:TeachingTip.Content>
        <TextBlock Text="Content of the teaching tip"></TextBlock>
    </winui:TeachingTip.Content>
</winui:TeachingTip>

如果习惯用Grid容器的方式，代码是这样的（效果完全一致）：

<winui:TeachingTip x:Name="ToggleThemeTeachingTip2" 
                   IsOpen="True" 
                   PreferredPlacement="Bottom" 
                   PlacementMargin="30" 
                   Background="Green" 
                   Foreground="White">
    <winui:TeachingTip.Content>
        <Grid>
            <TextBlock VerticalAlignment="Center" HorizontalAlignment="Center" Text="Content of the teaching tip"></TextBlock>
        </Grid>
    </winui:TeachingTip.Content>
</winui:TeachingTip>

2. 隐藏关闭图标 #

WinUI 2.4的TeachingTip自带了IsCloseButtonVisible属性，只要把它设为False，就能直接隐藏右上角的关闭按钮，非常省心。把这个属性加到你的控件里就行：

<winui:TeachingTip x:Name="ToggleThemeTeachingTip2" 
                   IsOpen="True" 
                   PreferredPlacement="Bottom" 
                   PlacementMargin="30" 
                   Background="Green" 
                   Foreground="White"
                   HorizontalContentAlignment="Center"
                   VerticalContentAlignment="Center"
                   IsCloseButtonVisible="False">
    <winui:TeachingTip.Content>
        <TextBlock Text="Content of the teaching tip"></TextBlock>
    </winui:TeachingTip.Content>
</winui:TeachingTip>

直接复制上面的完整代码就能满足你的两个需求啦~

内容的提问来源于stack exchange，提问作者sridhar patro