apple-touch-startup-image开机画面

代码：

<link rel="apple-touch-startup-image"  href="milanoo_startup.png" />

横屏和竖屏：

<link rel="apple-touch-startup-image" media="screen and (orientation: portrait)" href="milanoo_startup.png" /> <!--竖-->
<link rel="apple-touch-startup-image" media="screen and (orientation: landscape)" href="milanoo_startup1.png" /> <!--横-->

iphone：320*460

ipad：

startup_portrait.png  768x1004

startup_landscape.png 748x1024