在我的手机上检测Safari浏览器-不一样的问题

Question

我已经努力工作了几天，试图为Iphone 5 Safari浏览器方向检测编写JavaScript代码。一旦网页的用户将Iphone旋转到横向视图，该代码就可以成功进行初始检测。但是，它无法进行后续检测。我有链接到主asp页面和重定向的html消息页面的代码。花费了无数时间在Iphone 5上为Safari浏览器编写可行代码的人可以给我一些建议吗？谢谢！！！

此代码的目的是防止网页用户以横向模式查看网页。

这是JavaScript代码：

var matchMedia = window.msMatchMedia || window.MozMatchMedia || window.WebkitMatchMedia || window.matchMedia;

    if (typeof (matchMedia) !== 'undefined') {
        // use matchMedia function to detect orientationchange
        window.matchMedia('(orientation: portrait)').addListener(function () {
            window.location.href = "/handheld.aspx";
        });
    } else {
        // use orientationchange event with timeout (don't know orientation. fires too early.)
        $(window).on('orientationchange', function () {
            window.setTimeout(function () {
                if (window.matchMedia("(orientation: portrait)").matches) {
                    // you're in PORTRAIT mode
                    //window.alert(window.orientation);
                    window.location.href = "/handheld.aspx";
                }

                if (window.matchMedia("(orientation: landscape)").matches) {
                    // you're in LANDSCAPE mode
                    //window.alert(window.orientation);
                    window.location.href = "/handheld/landscape.htm";
                }

                if (window.innerWidth > window.innerHeight) {
                    //alert('landscape');
                    window.location.href = "/handheld/landscape.htm";
                } else {
                    //alert('portrait');
                    window.location.href = "/handheld.aspx";
                }

            }, 300)
        });
    }

    window.addEventListener("resize", function () {
        // Announce the new orientation number

        if (window.matchMedia("(orientation: portrait)").matches) {
            // you're in PORTRAIT mode
            //window.alert(window.orientation);
            window.location.href = "/handheld.aspx";
        }

        if (window.matchMedia("(orientation: landscape)").matches) {
            // you're in LANDSCAPE mode
            //window.alert(window.orientation);
            window.location.href = "/handheld/landscape.htm";
        }

        if (window.innerWidth > window.innerHeight) {
            //alert('landscape');
            window.location.href = "/handheld/landscape.htm";
        } else {
            //alert('portrait');
            window.location.href = "/handheld.aspx";
        }

    }, false);