在向下滚动选项卡内的内容页面时,选项卡有问题。我有三个内容页的TabbedPage。在ContentPages中滚动时,选项卡在IOS平台中向上移动一点,而在Android中则显示为正常。所有ContentPages的反应都相同。这是我的第一个ContentPage,但是其余的则具有正常的Grid / TableView而没有滚动。
<FlexLayout Direction="Column">
<FlexLayout FlexLayout.Grow="1">
<ScrollView>
<Grid Padding="5">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<StackLayout Orientation="Vertical" Grid.Row="0">
<StackLayout x:Name="listView" Padding="0,10,0,10"
BindableLayout.ItemsSource="{Binding TopPages}"
BindableLayout.ItemTemplate="{StaticResource PageListItemTemplate}">
</StackLayout>
</StackLayout>
<StackLayout Orientation="Vertical" Grid.Row="1" HeightRequest="350">
<StackLayout HorizontalOptions="FillAndExpand" Orientation="Horizontal">
<Label Text="Reciters" HorizontalOptions="StartAndExpand" Style="{StaticResource DesLabel}"/>
<Label Text="Show All" FontSize="Medium"
TextColor="{DynamicResource PrimaryTextColor}" HorizontalOptions="End">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding RecitersListCommand}" CommandParameter="{StaticResource TypeOne}"/>
</Label.GestureRecognizers>
</Label>
</StackLayout>
<Frame Style="{StaticResource DefaultFrame}" Padding="5">
<CollectionView x:Name="reciterItemView" ItemsSource="{Binding Reciters}"
SelectionMode="Single" ItemTemplate="{StaticResource ItemTemplate}">
<CollectionView.ItemsLayout>
<GridItemsLayout Orientation="Horizontal" VerticalItemSpacing="5"
HorizontalItemSpacing="5" Span="2" />
</CollectionView.ItemsLayout>
</CollectionView>
</Frame>
</StackLayout>
<StackLayout Orientation="Vertical" Grid.Row="2" HeightRequest="350">
<StackLayout HorizontalOptions="FillAndExpand" Orientation="Horizontal">
<Label Text="Translations" HorizontalOptions="StartAndExpand" Style="{StaticResource DesLabel}"/>
<Label Text="Show All" FontSize="Medium" TextColor="{DynamicResource PrimaryTextColor}" HorizontalOptions="End">
<Label.GestureRecognizers>
<TapGestureRecognizer Command="{Binding RecitersListCommand}" CommandParameter="{StaticResource TypeTwo}"/>
</Label.GestureRecognizers>
</Label>
</StackLayout>
<Frame Style="{StaticResource DefaultFrame}">
<CollectionView x:Name="translationItemView" ItemsSource="{Binding RecitersWithTranslation}"
SelectionMode="Single" ItemTemplate="{StaticResource ItemTemplate}" >
<CollectionView.ItemsLayout>
<GridItemsLayout Orientation="Horizontal" Span="2" />
</CollectionView.ItemsLayout>
</CollectionView>
</Frame>
</StackLayout>
</Grid>
</ScrollView>
</FlexLayout>
<StackLayout VerticalOptions="Center" HorizontalOptions="FillAndExpand"
BackgroundColor ="{AppThemeBinding Light={StaticResource LightPageBackgroundSecondaryColor},
Dark={StaticResource DarkPageBackgroundSecondaryColor}}">
<StackLayout.GestureRecognizers>
<TapGestureRecognizer Command="{Binding NavigateToPlayerPageCommand}"/>
</StackLayout.GestureRecognizers>
</StackLayout>
</FlexLayout>
页面中的资源
<DataTemplate x:Key="PageListItemTemplate">
<StackLayout Orientation="Vertical">
<StackLayout Orientation="Horizontal" HorizontalOptions="StartAndExpand">
<Label Style="{StaticResource DesLabel}" HorizontalOptions="Start" VerticalOptions="Center" Text="{Binding Title}"/>
</StackLayout>
<BoxView Style="{StaticResource HorizentalLine}"></BoxView>
<StackLayout.GestureRecognizers>
<TapGestureRecognizer Command="{Binding BindingContext.TopPageCommand, Source={x:Reference listView}}" CommandParameter="{Binding .}"/>
</StackLayout.GestureRecognizers>
</StackLayout>
</DataTemplate>
<DataTemplate x:Key="ItemTemplate">
<StackLayout Orientation="Vertical" HorizontalOptions="Center" Padding="0,5,0,0">
<FFImage:CachedImage HeightRequest="100" WidthRequest="100" Source="{Binding ImagePath}" Style="{StaticResource FFImageDefaultStyleWithoutBinding}">
<FFImage:CachedImage.Transformations>
<FFimageTransformation:CircleTransformation></FFimageTransformation:CircleTransformation>
</FFImage:CachedImage.Transformations>
</FFImage:CachedImage>
<Label Text="{Binding Name}" FontSize="Small" WidthRequest="150" HorizontalTextAlignment="Center" LineBreakMode="WordWrap" />
<StackLayout.GestureRecognizers>
<TapGestureRecognizer Command="{Binding BindingContext.OpenReciterChapterCommand,
Source={x:Reference reciterItemView}}" CommandParameter="{Binding .}">
</TapGestureRecognizer>
</StackLayout.GestureRecognizers>
</StackLayout>
</DataTemplate>
答案 0 :(得分:0)
查看完我的每段代码后,终于找到了问题所在。实际上,问题不在于设计或XAML。这是我在App.cs中使用的以下语句。
public App()
{
InitializeComponent();
var navigationPage = new Xamarin.Forms.NavigationPage(new MainPage());
navigationPage.On<iOS>().SetPrefersLargeTitles(true); // This line caused the problem.
MainPage = navigationPage;
}
删除该行即可解决问题。