Xamarin Forms Label/StackLayout 旋转问题

Xamarin Forms Label/StackLayout Rotation Issue

我正在尝试旋转 xamarin 表单中的一些标签,但存在一些问题。如果我旋转单个标签,文本将 trim 并且只有一些字母可见,我将每个标签放在一个 stacklayout 中,然后将 stacklayout 本身旋转 -90 度,如下面的代码

<StackLayout Spacing="0"
             Rotation="-90"
             VerticalOptions="Start"
             HorizontalOptions="End">
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
        <Label Text="ABCDE" TextColor="Black"/>
    </StackLayout>

标签正确旋转,没有文字 trimmed。现在的问题是堆栈布局的 VerticalOptionsHorizontaOptions 无法正常工作。当我将 VerticalOption 设置为 "Start" 时,它会显示不在顶部的所有内容,但会显示距离顶部 25% 的所有内容。当我将 HorizontalOptions 设置为 "Start" 或 "End" 时,HorizontalOptions 出现另一个问题,如下图所示:

任何人都可以帮助解决这个问题,或者是否有更好的方法来解决这个问题?提前致谢

原因:

当你设置 Rotation 时,它会围绕 itself.So 的中心旋转,顶部会有一些 'space'屏幕 .

解决方法:

您可以设置 StackLayout 的边距。

<StackLayout Spacing="0"
             Rotation="-90"
             Margin="0,-130,0,0"
             VerticalOptions="Start"
             HorizontalOptions="Center">
        ...
</StackLayout>

结果如下图。

我同意 Lucas 的回答,使用边距是一个有效的解决方案。

也许你应该调查一下 RelativeLayout? RelativeLayout 可用于相对于整体布局或其他视图在屏幕上定位视图。

注意:由于定义约束的方式,可以在 C# 中创建比使用 XAML 指定的更复杂的布局。

一些有用的链接

这是我使用 XAML.
拼凑的示例

<RelativeLayout>
    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=-30}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=25}" 
        BackgroundColor="Green" 
        Rotation="-90"
        Text="Hello World" 
        TextColor="White"
        />

    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=-10}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=25}" 
        BackgroundColor="Blue" 
        Rotation="-90"
        Text="Hello World" 
        TextColor="White"
        />

    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=10}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=25}" 
        BackgroundColor="Red" 
        Rotation="-90"
        Text="Hello World" 
        TextColor="White"
        />

    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=55}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=18}" 
        BackgroundColor="Green" 
        Rotation="-90"
        Text="123456" 
        TextColor="White"
        />

    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=75}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=120}" 
        BackgroundColor="Green" 
        Rotation="-180"
        Text="ABC DEF GHI" 
        TextColor="White"
        />

    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=120}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=200}" 
        BackgroundColor="Green" 
        Rotation="45"
        Text="JKL MNO PQR" 
        TextColor="White"
        />

    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=320}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=200}" 
        BackgroundColor="Green" 
        Rotation="-270"
        Text="Aa Bb Cc Dd" 
        TextColor="White"
        />

    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=0}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=200}" 
        BackgroundColor="Blue" 
        Rotation="-90"
        Text="Aa Bb Cc Dd" 
        TextColor="White"
        />
    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=0}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=200}" 
        BackgroundColor="Green" 
        Rotation="-70"
        Text="Aa Bb Cc Dd" 
        TextColor="White"
        />
    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=0}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=200}" 
        BackgroundColor="Blue" 
        Rotation="-50"
        Text="Aa Bb Cc Dd" 
        TextColor="White"
        />
    <Label 
        RelativeLayout.XConstraint="{ConstraintExpression Type=Constant,Property=X, Factor=0, Constant=0}" 
        RelativeLayout.YConstraint="{ConstraintExpression Type=Constant,Property=Y, Factor=0, Constant=200}" 
        BackgroundColor="Green" 
        Rotation="-30"
        Text="Aa Bb Cc Dd" 
        TextColor="White"
        />
</RelativeLayout>