我对在大多数手机和浏览器上使用favicons最简单的方式感到困惑.
1)Some sites建议使用足够的：
<link rel="apple-touch-icon-precomposed" href="apple-touch-icon-180x180.png">
这将适用于iOS 8,应由Android,BlackBerry,Windows等提取.
2)Other sites坚持要明确规定每一个可能的图标：
<link rel="apple-touch-icon" sizes="57x57" href="/apple-touch-icon-57x57.png"> <link rel="apple-touch-icon" sizes="114x114" href="/apple-touch-icon-114x114.png"> <link rel="apple-touch-icon" sizes="72x72" href="/apple-touch-icon-72x72.png"> <link rel="apple-touch-icon" sizes="144x144" href="/apple-touch-icon-144x144.png"> <link rel="apple-touch-icon" sizes="60x60" href="/apple-touch-icon-60x60.png"> <link rel="apple-touch-icon" sizes="120x120" href="/apple-touch-icon-120x120.png"> <link rel="apple-touch-icon" sizes="76x76" href="/apple-touch-icon-76x76.png"> <link rel="apple-touch-icon" sizes="152x152" href="/apple-touch-icon-152x152.png"> <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon-180x180.png"> <link rel="icon" type="image/png" href="/favicon-192x192.png" sizes="192x192"> <link rel="icon" type="image/png" href="/favicon-160x160.png" sizes="160x160"> <link rel="icon" type="image/png" href="/favicon-96x96.png" sizes="96x96"> <link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16"> <link rel="icon" type="image/png" href="/favicon-32x32.png" sizes="32x32"> <Meta name="msapplication-TileColor" content="#000000"> <Meta name="msapplication-TileImage" content="/mstile-144x144.png">
3)This answer说你只需要：
<!-- For IE 9 and below. ICO should be 32x32 pixels in size --> <!--[if IE]><link rel="shortcut icon" href="path/to/favicon.ico"><![endif]--> <!-- Touch Icons - iOS and Android 2.1+ 180x180 pixels in size. --> <link rel="apple-touch-icon-precomposed" href="apple-touch-icon-precomposed.png"> <!-- Firefox,Chrome,Safari,IE 11+ and Opera. 196x196 pixels in size. --> <link rel="icon" href="path/to/favicon.png">
以上哪一项将以最少的努力来覆盖最多的浏览器/手机？
解决方法
解决方案3中的代码正确但过时.
Precomposed Touch icons were deprecated in iOS 7和
Android Chrome does not support 196×196 icons anymore,but 192×192(
it really won’t use anything above 192×192;全面披露：我是本文的作者).
所以：
<!-- For IE 9 and below. ICO should be 32x32 pixels in size --> <!--[if IE]><link rel="shortcut icon" href="/path/to/favicon.ico"><![endif]--> <!-- Touch Icons - iOS and Android 2.1+ 180x180 pixels in size. --> <link rel="apple-touch-icon" href="/path/to/apple-touch-icon.png"> <!-- Firefox,IE 11+ and Opera. 192x192 pixels in size. --> <link rel="icon" href="/path/to/favicon.png">
如果您可以将favicon.ico放在网站的根目录下,您甚至可以跳过其声明,因为IE按惯例查找/favicon.ico.