我希望图像能够占用StackLayout
中的剩余空间,但是在XAML中这似乎不可能。图像始终会尝试以最大可用尺寸显示自己。
<StackLayout>
<Image Source="{Binding ProfileImage}" Aspect="AspectFit" HorizontalOptions="Center" VerticalOptions="Start" />
<StackLayout Orientation="Vertical" HorizontalOptions="Fill" VerticalOptions="EndAndExpand">
<Button HorizontalOptions="FillAndExpand" VerticalOptions="End" x:Name="_ButtonShare" Text="Share" />
<Button HorizontalOptions="FillAndExpand" VerticalOptions="End" x:Name="_ButtonExternalLinks" Text="External links"/>
</StackLayout>
</StackLayout>
我尝试了不同的Vertical-和HorizontalOptions来实现这一点,但第二个按钮总是被推出视图。使用特定高度也不是最佳解决方案。
似乎可以使用相对布局,但这意味着我必须绑定相对值,如果我定位不同的设备(如iPhone4S和iPhone5),这不是一个好主意。
<RelativeLayout>
<Image Source="{Binding ProfileImage}" Aspect="AspectFit"
RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=1}"
RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=0.7}"/>
<StackLayout Orientation="Vertical"
RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=0.8}"
RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=1}"
RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=0.2}">
<Button HorizontalOptions="FillAndExpand" VerticalOptions="End" x:Name="_ButtonShare" Text="Share" />
<Button HorizontalOptions="FillAndExpand" VerticalOptions="End" x:Name="_ButtonExternalLinks" Text="External links"/>
</StackLayout>
</RelativeLayout>
我该如何正确地做到这一点?
答案 0 :(得分:6)
我认为你要找的是一个网格。
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*"/>
<ColumnDefinition Width="1*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<Image Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" Source="{Binding ProfileImage}" Aspect="AspectFit" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" />
<Button Grid.Row="1" Grid.Column="0" HorizontalOptions="FillAndExpand" VerticalOptions="End" x:Name="_ButtonShare" Text="Share" />
<Button Grid.Row="1" Grid.Column="1" HorizontalOptions="FillAndExpand" VerticalOptions="End" x:Name="_ButtonExternalLinks" Text="External links"/>
</Grid>