iOS PWA 启动画面？

Question

就 PWA 启动屏幕而言，人们是否认为https://pwa-splash.now.sh/和https://medium.com/@applification/progressive-web-app-splash-screens-80340b45d210上的代码

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是最新且与设备兼容的方法吗？或者人们发现了它的问题并进行了修改？

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这是代码：

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<link rel="apple-touch-startup-image" href="images/splash/launch-640x1136.png" media="(device-width: 320px) and (device-height: 568px) and (-webkit-device-pixel-ratio: 2) and (orientation: portrait)">\n<link rel="apple-touch-startup-image" href="images/splash/launch-750x1294.png" media="(device-width: 375px) and (device-height: 667px) and (-webkit-device-pixel-ratio: 2) and (orientation: portrait)">\n<link rel="apple-touch-startup-image" href="images/splash/launch-1242x2148.png" media="(device-width: 414px) and (device-height: 736px) and (-webkit-device-pixel-ratio: 3) and (orientation: portrait)">\n<link rel="apple-touch-startup-image" href="images/splash/launch-1125x2436.png" media="(device-width: 375px) and (device-height: 812px) and (-webkit-device-pixel-ratio: 3) and (orientation: portrait)">\n<link rel="apple-touch-startup-image" href="images/splash/launch-1536x2048.png" media="(min-device-width: 768px) and (max-device-width: 1024px) and (-webkit-min-device-pixel-ratio: 2) and (orientation: portrait)">\n<link rel="apple-touch-startup-image" href="images/splash/launch-1668x2224.png" media="(min-device-width: 834px) and (max-device-width: 834px) and (-webkit-min-device-pixel-ratio: 2) and (orientation: portrait)">\n<link rel="apple-touch-startup-image" href="images/splash/launch-2048x2732.png" media="(min-device-width: 1024px) and (max-device-width: 1024px) and (-webkit-min-device-pixel-ratio: 2) and (orientation: portrait)">\n

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更新1：

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针对下面 Robinyo 的回答，以上面的第一个例子为例：

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<link rel="apple-touch-startup-image" href="images/splash/launch-640x1136.png" media="(device-width: 320px) and (device-height: 568px) and (-webkit-device-pixel-ratio: 2) and (orientation: portrait)">\n

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景观需要添加以下行吗？

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<link rel="apple-touch-startup-image" href="images/splash/launch-**1136x640**.png" media="(device-width: 320px) and (device-height: 568px) and (-webkit-device-pixel-ratio: 2) and (orientation: **landscape**)">\n

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也许我\xe2\x80\x99m错了，但我\xe2\x80\x99m实际上不确定iOS PWA是否会处理它。原因是因为我读到，在创建时（添加到主屏幕），iOS 选择一个 png 并将其存储在本地。因此，下次打开 PWA 应用程序时，它会在尝试连接到网络之前使用该本地图像。所以我\xe2\x80\x99m想知道的问题是iOS是否会在本地存储两张图像，一张用于纵向，一张用于横向。

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Answer 1

对于那些仍然想知道这一点的人，我创建了一个免费工具，可以生成各种尺寸的 iOS 初始屏幕（截至 2022 年 4 月有 26 个）以及所有必要的元标记（纵向和横向）。

目前，它支持各种屏幕尺寸，一直到最新的 iPhone 13 Pro Max。在 Browserstack 上提供的每台 iPhone 和 iPad 上进行了测试。

此线程中提到的 appsco.pe 链接不提供最新设备的启动屏幕，并且还缺少横向版本。

该工具本身可以免费使用，但它与我用于商业产品的代码相同，因此根据设计，它应该始终是最新的。

Answer 2

截至 2019 年 4 月 30 日，https://gist.github.com/EvanBacon/7fd4dc3be3d00096579bb0b134c56ec7可以正常工作（在 iPad Pro 11 英寸、iPhone XS Max 中测试），包括纵向和横向。

2020 年 11 月 12 日更新：

（我还没有在列出的任何 2020 年设备上进行测试。如果有人测试过，请随时提供建议）

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