Question

我想将GIF图片（带有动画）用作UWP应用程序中的启动画面。但是我不知道如何实现它。我找到一些链接来提供一些解决方案，但似乎它们不适用于UWP应用。像这个： https://social.msdn.microsoft.com/Forums/en-US/3fe32aae-84cb-47fe-a2b0-6650ce22e25c/splashscreen-that-loads-an-animated-gif?forum=vssmartdevicesvbcs

private void Form1_Load(object sender, EventArgs e)
    {    

        String imgPath = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().GetName().CodeBase.ToString()) + "\\Ani.gif"; 

        StringBuilder sb = new StringBuilder();
        sb.Append("<html><body>");
        sb.Append("<img src = \"" + imgPath + "\">");
        sb.Append("</body></html>");

        webBrowser1.DocumentText = sb.ToString();

    }

您是否有适用于UWP应用程序的解决方案？请指教。谢谢！

更多：

通过检查朱先生的链接，我制作了一个gif闪屏，它可以工作。但是有一个新问题：在gif显示之前，可能会有5s白色屏幕。如何删除？新的测试代码如下：

Package.appxmanifest：注释掉原始的初始屏幕png文件

 <!--<uap:SplashScreen Image="Assets\SplashScreen.png" />-->

App.xaml.cs：

        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {
            if (e.PreviousExecutionState != ApplicationExecutionState.Running)
            {
                bool loadState = (e.PreviousExecutionState == ApplicationExecutionState.Terminated);
                ExtendedSplash extendedSplash = new ExtendedSplash(e.SplashScreen, loadState);
                Window.Current.Content = extendedSplash;
            }

            Window.Current.Activate();
        }

ExtendedSplash.xaml：

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

<Grid Background="#464646">
    <Image x:Name="extendedSplashImage" Source="Assets/test.gif"/>
</Grid>

ExtendedSplash.xaml.cs：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.ApplicationModel.Activation;
using Windows.UI.Core;
using System.Diagnostics;
using Windows.UI.ViewManagement;

// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

namespace SplashScreenExample
{
    partial class ExtendedSplash : Page
    {
        internal Rect splashImageRect; // Rect to store splash screen image coordinates.
        private SplashScreen splash; // Variable to hold the splash screen object.
        internal bool dismissed = false; // Variable to track splash screen dismissal status.
        internal Frame rootFrame;

        // Define methods and constructor
        public ExtendedSplash(SplashScreen splashscreen, bool loadState)
        {
            InitializeComponent();

            ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.FullScreen;

            splash = splashscreen;
            if (splash != null)
            {
                // Register an event handler to be executed when the splash screen has been dismissed.
                splash.Dismissed += new TypedEventHandler<SplashScreen, Object>(DismissedEventHandler);

                // Retrieve the window coordinates of the splash screen image.
                splashImageRect = splash.ImageLocation;
                splashImageRect.Width = 1092;
                splashImageRect.Height = 1080;
                splashImageRect.X = 0;
                splashImageRect.Y = 0;
            }

            // Create a Frame to act as the navigation context
            rootFrame = new Frame();
        }

        // Include code to be executed when the system has transitioned from the splash screen to the extended splash screen (application's first view).
        void DismissedEventHandler(SplashScreen sender, object e)
        {
            dismissed = true;

            // Complete app setup operations here...
        }

        void DismissExtendedSplash()
        {
            // Navigate to mainpage
            rootFrame.Navigate(typeof(MainPage));
            // Place the frame in the current Window
            Window.Current.Content = rootFrame;
        }
    }
}

Answer 1

请选中https://doc.qt.io/qt-5/qabstractitemmodel.html#beginInsertRows，其中介绍了如何扩展初始画面，您可以使用Gif图像自定义初始画面。有关完整的代码示例，请选中此Display a splash screen for more time。

如何在UWP应用中将GIF图片制作为SplashScreen？

1 个答案: