<meta name="viewport" content="width=device-width, user-scalable=no"> <meta name=‘viewport‘ content=‘initial-scale=1.0, user-scalable=no‘>
这两个效果一样，initial-scale=1.0也有width=device-width的效果
<meta name="viewport" content="width=640, user-scalable=no">
还是这样写比较好
原文：http://www.cnblogs.com/jimaojin/p/7943627.html