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html5 中meta中 content=width=device-width注意
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0">
<style>
body { margin:0; font-size: 13px; font-family: sans-serif; color:#333; line-height: 1.5; background: #fff;}div{ margin:0;} a{-webkit-tap-highlight-color:transparent; color:inherit;}.jesgoo-ad-container { width: 100%; height: 100%; overflow: hidden;}.jesgoo-content { position: absolute; left: 0; top: 0; width: 100%; height: 100%; -moz-box-sizing: border-box; -webkit-box-sizing: border-box; -o-box-sizing: border-box; -ms-box-sizing: border-box; box-sizing: border-box; text-decoration: none; }.jesgoo-icon { float: left; border: none; width: 36px; height: 36px; margin:6px 0 0 12px; border-radius: 6px; overflow: hidden;}.jesgoo-text{ float: left; padding-left: 10px; padding-top: 6px; width: 210px; overflow: hidden;}.jesgoo-text.text { width: 260px; }.jesgoo-title, .jesgoo-desc { white-space: nowrap; overflow: hidden; text-overflow:ellipsis;}.jesgoo-title { font-weight: 800;}.jesgoo-desc { color: #666; font-size: 12px; }.jesgoo-desc marquee{ /*text-indent: -180px;*/} .jesgoo-btn{ position: absolute; width: 40px; line-height: 24px; text-align: center; right: 12px; top: 50%; margin-top: -12px; color:#fff; font-style: normal; border-radius: 4px; background: #2e97ea; display: none;}</style>
<script type="text/javascript">
window.onload = function(){var containerId = ‘jesgoo-id-container‘;var resetSize = function () { var containerEle = document.getElementById(containerId); var win = window; var winW = win.innerWidth; var winH = win.innerHeight; var fzW, fzH; if (winW / winH < 5 / 2) { fzW = winW / 300 * 20; fzH = 1000; } else { fzW = 1000; fzH = winH / 96 * 20; } var fz = fzW > fzH ? fzH : fzW; containerEle.style.fontSize = fz + ‘px‘;};//resetSize();var aEle = document.getElementById("jesgoo-link");var attrJSON = aEle.getAttribute("extra");var attrObj = eval("("+ attrJSON +")");var btn = document.getElementById(‘jesgoo-btn‘);if(attrObj.act == 2){ btn.innerHTML = "下载";}else{ btn.innerHTML = "查看";}btn.style.display = "block"}</script>
</head>
<body>
<div id="jesgoo-id-container" class="jesgoo-container">
<a target="_blank" id="jesgoo-link" class="jesgoo-content" style="text-decoration: none;" href=http://www.baidu.com extra="{‘act‘:1,‘pkg‘:‘‘,‘title‘:‘‘,‘adid‘:‘0‘,‘durl‘:[‘‘],‘iurl‘:[‘‘],‘aurl‘:[‘‘]}">
<div class="jesgoo-text text">
<div class="jesgoo-title">分享:关键时刻不行怎么办</div>
<div class="jesgoo-desc"><marquee behavior="scroll" direction="left">只需一招 给她夜夜惊喜</marquee></div>
</div>
<i id="jesgoo-btn" class="jesgoo-btn">下载</i>
</a>
</div>
</body>
</html>
以上这个物料在ios 320*50的UIWebView iphone的设备上（iPhone5 iPhone4）上右侧有下载或查看按键
但是 这个物料在ios 320*50的UIWebView ipad的设备上 没有看到右侧按键
原因是下面的 content="width=device-width, user-scalable=no, initial-scale=1.0" 设置的content的宽为设备的宽度 button的位置是做了对右偏移的控制 在ipad上device－width 是728 实际button的x位置是716 但是webview 只有320宽度，所以看不到了。使用中注意这个。
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0">
<style>
html5 中meta中 content=width=device-width注意