我希望集合视图的内容后面没有空白区域。
\n我尝试将按钮放在页脚中，但后来遇到了问题，属性 isenabled = false 没有在我后面的代码中应用到它。\n这是我的 xaml 文件：
\n<ContentPage.Content>\n <RefreshView x:DataType="local:QuestionViewModel" Command="{Binding LoadCommand}" IsRefreshing="{Binding IsBusy, Mode=TwoWay}">\n <ScrollView>\n <StackLayout>\n <views:MyTextView LaTeX="{Binding Formulation}" HorizontalOptions="Center" Margin="15, 10, 15, 0"/>\n <!--<RefreshView x:DataType="local:QuestionViewModel" Command="{Binding LoadCommand}" IsRefreshing="{Binding IsBusy, Mode=TwoWay}">-->\n <CollectionView\n ItemsSource="{Binding Answers, Mode=TwoWay}"\n SelectedItems="{Binding SelectedAnswers, Mode=TwoWay}"\n SelectionMode="Multiple"\n x:Name="collectionView"\n SelectionChanged="collectionView_SelectionChanged"\n >\n <CollectionView.ItemsLayout>\n <LinearItemsLayout Orientation="Vertical"/>\n </CollectionView.ItemsLayout>\n <CollectionView.ItemTemplate>\n <DataTemplate x:DataType="model:Answer">\n <StackLayout Padding="10">\n <VisualStateManager.VisualStateGroups>\n <VisualStateGroup Name="CommonStates">\n <VisualState Name="Normal">\n <VisualState.Setters>\n <Setter TargetName="frame" Property="Frame.BackgroundColor" Value="{Binding AnswerColor}"/>\n </VisualState.Setters>\n </VisualState>\n <VisualState Name="Selected">\n <VisualState.Setters>\n <Setter TargetName="frame" Property="Frame.BackgroundColor" Value="{DynamicResource MainColor}"/>\n <Setter TargetName="label" Property="views:MyTextView.TextColor" Value="White"/>\n …