H5 判断应用是否打开或是下载

(function () {
    var openUrl = window.location.search;
    try {
        openUrl = openUrl.substring(1, openUrl.length);
    } catch (e) {
    }
    var isiOS = navigator.userAgent.match('iPad')
      || navigator.userAgent.match('iPhone')
      || navigator.userAgent.match('iPod'), isAndroid = navigator.userAgent
      .match('Android'), isDesktop = !isiOS && !isAndroid;
    if (isiOS) {
        window.location = "[scheme]://[host]?url=" + openUrl;
        setTimeout(function () {
            window.location = "itms-apps://itunes.apple.com/app/[name]/[id]?mt=8";
        }, 25);

    } else if (isAndroid) {
        window.location = "intent://[host]/" + "url=" + openUrl + "#Intent;scheme=[scheme];package=[package_name];end";
    } else {
        window.location.href = openUrl;
    }
})();