注意次方案必须内容超出浏览器高度，如果做高度100%的没法实现
<meta name="viewport" content="width=320.1,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no,minimal-ui" />
<meta name="apple-mobile-web-app-title" content="yeziyuan" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta content="telephone=no" name="format-detection" />
<meta name="full-screen" content="yes" />
<meta name="x5-fullscreen" content="true" />
