windows phone 8.1如何全局设置背景图片？

Question

我是 windows phone 的新手，与 windows phone 8 相比，windows phone 8.1 似乎有很多变化。如何在全局范围内更改我的应用程序的背景图像，而不是在每个视图中一次又一次地声明它.

Answer 1

在 App.xaml 中声明 ImageBrush

<Application x:Class="App1.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:App1">
    <Application.Resources>
        <ImageBrush x:Key="BgImage" ImageSource="Assets/Logo.png" />
    </Application.Resources>
</Application>

在 App.xaml.cs 中设置 rootFrame 的背景 -> OnLaunched 方法：

protected override void OnLaunched(LaunchActivatedEventArgs e)
{
    #if DEBUG
        if (System.Diagnostics.Debugger.IsAttached)
        {
            this.DebugSettings.EnableFrameRateCounter = true;
        }
    #endif

    Frame rootFrame = Window.Current.Content as Frame;

    if (rootFrame == null)
    {
        rootFrame = new Frame();

        // TODO: diesen Wert auf eine Cachegröße ändern, die für Ihre Anwendung geeignet ist
        rootFrame.CacheSize = 1;

        if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
        {
            // TODO: Zustand von zuvor angehaltener Anwendung laden
        }

        Window.Current.Content = rootFrame;
    }

    if (rootFrame.Content == null)
    {
        if (rootFrame.ContentTransitions != null)
        {
            this.transitions = new TransitionCollection();
            foreach (var c in rootFrame.ContentTransitions)
            {
                this.transitions.Add(c);
            }
        }

        rootFrame.ContentTransitions = null;
        rootFrame.Navigated += this.RootFrame_FirstNavigated;

        if (!rootFrame.Navigate(typeof(MainPage), e.Arguments))
        {
            throw new Exception("Failed to create initial page");
        }
    }

    rootFrame.Background = (ImageBrush)Resources["BgImage"];
    Window.Current.Activate();
}

比让你的页面背景透明。

这是我的 Page.xaml：

<Page
    x:Class="App1.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:App1"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid>
        <TextBlock Text="Hello World !"/>
    </Grid>
</Page>

希望对你有帮助