android - Xamarin使用以下形式形成RelativeLayout

我在应用程序的列表页面上使用FloatingActionButton，我也想添加一个searchBar。但我无法向他们显示该页面。我的代码和屏幕截图已关闭。如何显示searchBar？

FAB Github

我的代码：

<ContentPage.Content>
        <RelativeLayout>
      <SearchBar
             x:Name="searchBar"
             Placeholder="Ara"
             />
            <ContentView
                RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=1}"
                RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=1}">
                <ListView
                    x:Name="list"
                    BackgroundColor="White">
                    <ListView.ItemTemplate>
                        <DataTemplate>
                            <TextCell
                                Text="{Binding .}" />
                        </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>
            </ContentView>
            <fab:FloatingActionButton
                x:Name="fabBtn"
                Source="plus.png"
                Size="Normal"
                Clicked="Handle_FabClicked"
                NormalColor="Green"
                RippleColor="Red"
                RelativeLayout.XConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=1, Constant=-75}"
                RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=1, Constant=-75}" />
        </RelativeLayout>
    </ContentPage.Content>
</ContentPage>

最佳答案

@Cheesebaron是正确的。问题是因为视图彼此重叠。相反，您需要向ContentView添加约束，以使其Y低于searchBar。考虑这样的事情：

<ContentView
            RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=1}"
            RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=1}"
            RelativeLayout.YConstraint="{ConstraintExpression Type=RelativeToView, Property=Height, ElementName=searchBar}" />

请注意，要根据RelativeLayout.YConstraint的Height添加searchBar。

关于android - Xamarin使用以下形式形成RelativeLayout，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/41505487/