iOS Web App 启动画面未加载答案

【问题标题】：iOS Web App Splash Screen not loadingiOS Web App 启动画面未加载
【发布时间】：2015-08-18 04:45:24
【问题描述】：

我一直在尝试为我的网络应用程序在 iOS 设备上显示启动画面。当我将应用程序添加到主屏幕后加载应用程序时，我得到一个白屏并且没有加载任何内容。但是，如果我将元标记移动到我的图标和启动屏幕下方，应用程序将正常加载，但启动屏幕不会加载。无论代码在哪里，这些图标都适用于所有设备。

下面是我目前拥有的代码：

<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="apple-mobile-web-app-capable" content="yes"/>
<meta name="apple-mobile-web-app-status-bar-style" content="black"/>


<!--iOS ICONS-->

<link href="https://baea7f48c88acedc0f88adbf93a90554fa064d59-www.googledrive.com/host/0B1QgF0628vPRfjZTZDQ5NE1Fb3J3bnlsLTJxVk93YmdiZlRDTzFPaXJoWnE1VFlWVlZPaVU/apple-touch-icon-120x120.png" 
  rel="apple-touch-icon" 
  sizes="120x120" />

<link href="https://baea7f48c88acedc0f88adbf93a90554fa064d59-www.googledrive.com/host/0B1QgF0628vPRfjZTZDQ5NE1Fb3J3bnlsLTJxVk93YmdiZlRDTzFPaXJoWnE1VFlWVlZPaVU/apple-touch-icon-152x152.png" 
  rel="apple-touch-icon" 
  sizes="152x152" />

 <link href="https://baea7f48c88acedc0f88adbf93a90554fa064d59-www.googledrive.com/host/0B1QgF0628vPRfjZTZDQ5NE1Fb3J3bnlsLTJxVk93YmdiZlRDTzFPaXJoWnE1VFlWVlZPaVU/apple-touch-icon-180x180.png" 
  rel="apple-touch-icon" 
  sizes="180x180" />


<!--iOS SPLASH SCREENS-->

<!--iPhone 5-->
<link rel="apple-touch-startup-image" 
  href="https://baea7f48c88acedc0f88adbf93a90554fa064d59-www.googledrive.com/host/0B1QgF0628vPRfjZTZDQ5NE1Fb3J3bnlsLTJxVk93YmdiZlRDTzFPaXJoWnE1VFlWVlZPaVU/Default-portrait@2x~iphone5.jpg"
  media="(device-width: 320px) and (device-height: 568px) 
        and (-webkit-device-pixel-ratio: 2)"/>

<!--iPad, Landscape-->
<link rel="apple-touch-startup-image" 
  href="https://baea7f48c88acedc0f88adbf93a90554fa064d59-www.googledrive.com/host/0B1QgF0628vPRfjZTZDQ5NE1Fb3J3bnlsLTJxVk93YmdiZlRDTzFPaXJoWnE1VFlWVlZPaVU/Default-Landscape~ipad.png"        
  media="(device-width: 768px) and (device-height: 1024px) 
        and (orientation: landscape) 
        and (-webkit-device-pixel-ratio: 1)"/>

<!--iPad retina, Landscape-->
<link rel="apple-touch-startup-image" 
  href="https://baea7f48c88acedc0f88adbf93a90554fa064d59-www.googledrive.com/host/0B1QgF0628vPRfjZTZDQ5NE1Fb3J3bnlsLTJxVk93YmdiZlRDTzFPaXJoWnE1VFlWVlZPaVU/Default-Landscape@2x~ipad.png"   
  media="(device-width: 768px) and (device-height: 1024px) 
        and (orientation: landscape) 
        and (-webkit-device-pixel-ratio: 2)"/>

包含谷歌驱动链接的长href的原因是因为我在谷歌潜水上有网站用于测试目的。它基本上代表网站地址。

下面是代码的样子，我已经重命名了一些文件并移动了它们。我注意到不需要谷歌驱动器地址。

<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="apple-mobile-web-app-capable" content="yes"/>
<meta name="apple-mobile-web-app-status-bar-style" content="black"/>

<!-- iPhone ICON -->
<link href="App Icon/apple-touch-icon-57x57.png" sizes="57x57" rel="apple-touch-icon">
<!-- iPad ICON-->
<link href="App Icon/apple-touch-icon-72x72.png" sizes="72x72" rel="apple-touch-icon">
<!-- iPhone (Retina) ICON-->
<link href="App Icon/apple-touch-icon-114x114.png" sizes="114x114" rel="apple-touch-icon">
<!-- iPad (Retina) ICON-->
<link href="App Icon/apple-touch-icon-144x144.png" sizes="144x144" rel="apple-touch-icon">

<!-- iPhone SPLASHSCREEN-->
<link href="images/apple-touch-startup-image-320x460.png" media="(device-width: 320px)" rel="apple-touch-startup-image">
<!-- iPhone (Retina) SPLASHSCREEN-->
<link href="images/apple-touch-startup-image-640x920.png" media="(device-width: 320px) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
<!-- iPad (portrait) SPLASHSCREEN-->
<link href="images/apple-touch-startup-image-768x1004.png" media="(device-width: 768px) and (orientation: portrait)" rel="apple-touch-startup-image">
<!-- iPad (landscape) SPLASHSCREEN-->
<link href="images/apple-touch-startup-image-748x1024.png" media="(device-width: 768px) and (orientation: landscape)" rel="apple-touch-startup-image">
<!-- iPad (Retina, portrait) SPLASHSCREEN-->
<link href="images/apple-touch-startup-image-1536x2008.png" media="(device-width: 1536px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
<!-- iPad (Retina, landscape) SPLASHSCREEN-->
<link href="images/apple-touch-startup-image-2048x1496.png" media="(device-width: 1536px)  and (orientation: landscape) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">

这些图标在我试用该应用程序的任何设备上都能正常工作。但是启动画面仍然不起作用。

只有一页写着 HELLO WORLD!。当它被添加到主屏幕时，图标可以工作，但启动屏幕不能。

【问题讨论】：

你要在什么设备上加载这个？
@hopkins-matt iPad Air 2 和 iPod 5

标签： html ios splash-screen

【解决方案1】：

根据Mulitple “apple-touch-startup-image” resolutions for iOS web app (esp. for iPad)? 上的Marconi's answer，请尝试使用这些作为初始屏幕元标记：（您仍然需要 iPhone 6 和 6 Plus 标记）

    <!-- iPhone SPLASHSCREEN-->
    <link href="apple-touch-startup-image-320x460.png" media="(device-width: 320px)" rel="apple-touch-startup-image">
    <!-- iPhone (Retina) SPLASHSCREEN-->
    <link href="apple-touch-startup-image-640x920.png" media="(device-width: 320px) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
    <!-- iPhone 5 (Retina) SPLASHSCREEN-->
    <link href="apple-touch-startup-image-640x1136.png" media="(device-width: 320px) and (device-height: 568px) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
    <!-- iPad (portrait) SPLASHSCREEN-->
    <link href="apple-touch-startup-image-768x1004.png" media="(device-width: 768px) and (orientation: portrait)" rel="apple-touch-startup-image">
    <!-- iPad (landscape) SPLASHSCREEN-->
    <link href="apple-touch-startup-image-748x1024.png" media="(device-width: 768px) and (orientation: landscape)" rel="apple-touch-startup-image">
    <!-- iPad (Retina, portrait) SPLASHSCREEN-->
    <link href="apple-touch-startup-image-1536x2008.png" media="(device-width: 1536px) and (orientation: portrait) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">
    <!-- iPad (Retina, landscape) SPLASHSCREEN-->
    <link href="apple-touch-startup-image-2048x1496.png" media="(device-width: 1536px)  and (orientation: landscape) and (-webkit-device-pixel-ratio: 2)" rel="apple-touch-startup-image">

更新的演示：

   <!-- iPad retina portrait startup image -->
   <link href="//placehold.it/1536x2008.png"
         media="(device-width: 768px) and (device-height: 1024px)
                and (-webkit-device-pixel-ratio: 2)
                and (orientation: portrait)"
         rel="apple-touch-startup-image">

   <!-- iPad retina landscape startup image -->
   <link href="//placehold.it/1496x2048.png"
         media="(device-width: 768px) and (device-height: 1024px)
                and (-webkit-device-pixel-ratio: 2)
                and (orientation: landscape)"
         rel="apple-touch-startup-image">

   <!-- iPad non-retina portrait startup image -->
   <link href="//placehold.it/768x1004.png"
         media="(device-width: 768px) and (device-height: 1024px)
                and (-webkit-device-pixel-ratio: 1)
                and (orientation: portrait)"
         rel="apple-touch-startup-image">

   <!-- iPad non-retina landscape startup image -->
   <link href="//placehold.it/748x1024.png"
         media="(device-width: 768px) and (device-height: 1024px)
                and (-webkit-device-pixel-ratio: 1)
                and (orientation: landscape)"
         rel="apple-touch-startup-image">

   <!-- iPhone 6 Plus portrait startup image -->
   <link href="//placehold.it/1242x2148.png"
         media="(device-width: 414px) and (device-height: 736px)
                and (-webkit-device-pixel-ratio: 3)
                and (orientation: portrait)"
         rel="apple-touch-startup-image">

   <!-- iPhone 6 Plus landscape startup image -->
   <link href="//placehold.it/1182x2208.png"
         media="(device-width: 414px) and (device-height: 736px)
                and (-webkit-device-pixel-ratio: 3)
                and (orientation: landscape)"
         rel="apple-touch-startup-image">

   <!-- iPhone 6 startup image -->
   <link href="//placehold.it/750x1294.png"
         media="(device-width: 375px) and (device-height: 667px)
                and (-webkit-device-pixel-ratio: 2)"
         rel="apple-touch-startup-image">

   <!-- iPhone 5 startup image -->
   <link href="//placehold.it/640x1096.png"
         media="(device-width: 320px) and (device-height: 568px)
                and (-webkit-device-pixel-ratio: 2)"
         rel="apple-touch-startup-image">

   <!-- iPhone < 5 retina startup image -->
   <link href="//placehold.it/640x920.png"
         media="(device-width: 320px) and (device-height: 480px)
                and (-webkit-device-pixel-ratio: 2)"
         rel="apple-touch-startup-image">

   <!-- iPhone < 5 non-retina startup image -->
   <link href="//placehold.it/320x460.png"
         media="(device-width: 320px) and (device-height: 480px)
                and (-webkit-device-pixel-ratio: 1)"
         rel="apple-touch-startup-image">

【讨论】：

刚刚尝试过，但由于某种原因它仍然无法正常工作。也许它与它在谷歌驱动器上有关，但除此之外我不知道可能出了什么问题。它只是显示一个白屏，然后加载应用程序的主页。
好吧，我刚刚尝试了其中一个 Google Drive URL 并得到了 404
您尝试了我发布的网址之一或其他网址？
我已经尝试了您建议的代码的几个不同版本，但无法使其正常工作。我添加了一个链接，指向我在原始帖子中用来测试的页面。如果您有兴趣查看整个内容，我还添加了指向我的 google 驱动器文件的链接
@JamesBaker 我在您的初始页面 link 标记中尝试了其中一个原始 URL。它导致了 404。我已经尝试过新的，但我相信你的主要问题可能是尺寸。我已经包含了一个工作示例。您应该能够将其复制并粘贴到其中并查看启动图像。我会仔细检查您的图片尺寸是否正确。