html - iOS Web App 启动画面未加载

Question

我一直在尝试让我的网络应用程序出现在 iOS 设备上的启动画面。当我将应用程序添加到我的主屏幕后加载它时，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画面下方，应用程序将正常加载，但不会加载启动画面。无论代码位于何处，这些图标都适用于所有设备。

下面是我现在的代码:

<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 google drive 链接的长 href 的原因是因为我在 google dive 上有该网站用于测试目的。它基本上代表网站地址。

<--编辑-->

代码如下所示，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，图标有效，但初始屏幕无效。

Answer 1

根据 Marconi's answer在 Mulitple “apple-touch-startup-image” resolutions for iOS web app (esp. for iPad)? , 试试这些用于初始屏幕元标记:(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">