JS -判断、监听屏幕横竖屏切换事件

通过监听window.orientationchange事件，当横竖屏切换事件时触发

<!doctype html>
<html>
  <head>
        <title>Mobile Cookbook</title>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <style>
        html, body {
            padding: none;
            margin: none;
        }
        </style>
    <link rel="stylesheet" href="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.css" />
    <script src="http://code.jquery.com/jquery-1.6.4.min.js"></script>
    <script src="http://code.jquery.com/mobile/1.0/jquery.mobile-1.0.min.js"></script>
  </head>
  <body>
    <div id="a">
    </div>
        <script>
            var metas = document.getElementsByTagName('meta');
            var i;
            if (navigator.userAgent.match(/iPhone/i)) {
                for (i=0; i<metas.length; i++) {
                    if (metas[i].name == "viewport") {
                        metas[i].content = "width=device-width, minimum-scale=1.0, maximum-scale=1.0";
                    }
                }
                document.addEventListener("gesturestart", gestureStart, false);
            }
            function gestureStart() {
                for (i=0; i<metas.length; i++) {
                    if (metas[i].name == "viewport") {
                        metas[i].content = "width=device-width, minimum-scale=0.25, maximum-scale=1.6";
                    }
                }
            }
        </script>
    
        <script>
      $(window).bind('orientationchange',function(event){
        updateOrientation(event.orientation);
      })
            function updateOrientation(orientation) {
        $("#a").html("<p>"+orientation.toUpperCase()+"</p>");
            }
        </script>
    </body>
</html>

效果图 - 竖屏：

JS -判断、监听屏幕横竖屏切换事件

横屏：

JS -判断、监听屏幕横竖屏切换事件

JS -判断、监听屏幕横竖屏切换事件

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