如何将ListView页脚设置为IsVisible = false

Question

这是页脚的XAML代码：

  <ListView.FooterTemplate IsVisible="{Binding IsLoading}">
    <DataTemplate>
      <StackLayout Padding="8">
        <Label Text ="Loading ..." 
               HorizontalOptions="CenterAndExpand"
               VerticalOptions="CenterAndExpand"/>
        <ActivityIndicator IsRunning="{Binding IsLoading}"                                                   
                Color="Blue" 
                HorizontalOptions="CenterAndExpand"
               VerticalOptions="CenterAndExpand"/>
      </StackLayout>
    </DataTemplate>        
  </ListView.FooterTemplate>

ActivityIndicator按预期工作（当IsLoading设置为false时停止）。但是，当IsLoading设置为false时，我想让整个页脚消失，​​而我无法实现这一点。

Answer 1

您必须为body#home_page .nav_item:nth-child(1), body#about_page .nav_item:nth-child(2), { background-color: red; /* more css styles that you want to give to your active menu item */ } 设置BindingContext，并将Footer更改为IsVisible：

StackLayout