Windows Phone应用程序栏隐藏页面内容

时间:2014-06-08 13:01:02

标签: windows-phone-8 windows-phone

我正在尝试使用Windows Phone 8开发,并且已经从这里和那里的示例中删除了一个小应用程序。但是,我偶然发现了一个我不习惯的问题:当我向页面添加应用程序栏时(在XAML或C#中),它隐藏了内容的底部,无法向下滚动

我的XAML是:

<phone:PhoneApplicationPage
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:maps="clr-namespace:Microsoft.Phone.Maps.Controls;assembly=Microsoft.Phone.Maps"
xmlns:maptk="clr-namespace:Microsoft.Phone.Maps.Toolkit;assembly=Microsoft.Phone.Controls.Toolkit"
xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
x:Class="MyApp.MainPage"
mc:Ignorable="d"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True">

<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent" ScrollViewer.VerticalScrollBarVisibility="Auto">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>

    <!--TitlePanel contains the name of the application and page title-->
    <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
        <TextBlock Text="MY APPLICATION" Style="{StaticResource PhoneTextNormalStyle}" Margin="12,0"/>
        <TextBlock x:Name="appNameText" Text="page name" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
    </StackPanel>

    <!--ContentPanel - place additional content here-->
    <Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">

        <maps:Map x:Name="locationMap" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Width="446" Height="347">
            <maptk:MapExtensions.Children>
                <maptk:Pushpin Name="MyLocation" Visibility="Collapsed" />
            </maptk:MapExtensions.Children>
        </maps:Map>
        <Button x:Name="button" Content="Button" HorizontalAlignment="Left" Margin="165,362,0,0" VerticalAlignment="Top" Width="291" />
        <TextBlock x:Name="longitudeText" HorizontalAlignment="Left" Margin="338,462,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Text="longitude placeholder"/>
        <TextBlock x:Name="latitudeText" HorizontalAlignment="Left" Margin="338,507,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Text="latitude placeholder"/>

        <toolkit:ToggleSwitch x:Name="switch1" IsChecked="True" Content="First switch" Margin="165,424,24,76"/>
        <toolkit:ToggleSwitch x:Name="switch2" Margin="114,482,24,10" Content="Second switch" IsChecked="True"/>

    </Grid>

</Grid>

创建应用栏的代码:

        //    // Set the page's ApplicationBar to a new instance of ApplicationBar.
        ApplicationBar = new ApplicationBar();

    //    // Create a new button and set the text value to the localized string from AppResources.
        ApplicationBarIconButton appBarButton = new ApplicationBarIconButton(new Uri("/Assets/AppBar/appbar.add.rest.png", UriKind.Relative));
        appBarButton.Text = AppResources.AppBarButtonText;
        appBarButton.Click += appBarButton_Click;
        ApplicationBar.Buttons.Add(appBarButton);

    //    // Create a new menu item with the localized string from AppResources.
        ApplicationBarMenuItem appBarMenuItem = new ApplicationBarMenuItem(AppResources.AppBarMenuItemText);
        ApplicationBar.MenuItems.Add(appBarMenuItem);

没有应用栏的结果: without app bar

并添加了应用栏: with app bar

注意缺少开关的标签。 (实际上,底部开关本身也是隐藏的,但它看起来好像在无意识地摆弄“修复”它。

所以,很长的问题简短:有人可以指出我出现这种异常情况的错误是什么?

1 个答案:

答案 0 :(得分:1)

页面不会自动包含ScrollViewer,因此您需要在要滚动的元素周围添加一个(在您的情况下,我猜这意味着在LayoutRoot网格周围)。

ScrollViewer.VerticalScrollBarVisibility="Auto"是ScrollViewer用来确定是否可见的东西,但由于根本没有ScrollViewer,所以什么都不做。 (这是一个附加属性,就像Grid.Row一样,只有当元素在Grid中时才有用。)

只有一个案例(据我所知),其中app栏实际位于页面前方:AppBar的不透明度不是100%。在这种情况下,页面实际上落后于它,因此您必须自己管理可见/何处/如何显示。