h5 js判断是安卓还是ios设备，跳转到对应的下载地址

/*ios和安卓跳转 js*/
$(function(){
    var u = navigator.userAgent;
    var ua = navigator.userAgent.toLowerCase();
    var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1; //android终端
    var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端
    if(ua.match(/MicroMessenger/i)=="micromessenger") {   //微信内置浏览器+应用宝链接
        $(".go").bind('touchstart', function (event) {
　　        //跳转到下载地址  这块我写的是安卓下载地址
            window.location.href='http://tstatics.iyuwan.com/files/apk/201605/Iyuwan.apk'
        });
    }else{
        if(isiOS){
            $(".go").bind('touchstart', function (event) {

               //跳转到ios下载地址 

                window.location.href='https://appsto.re/cn/KG6P2.i'

            });
        }else if(isAndroid){
            $(".go").bind('touchstart', function (event) {
                window.location.href='http://tstatics.iyuwan.com/files/apk/201605/Iyuwan.apk'
            });
        }else{  //PC 端
            $(".go").click(function(){

                //跳转到andriod下载地址 

                window.location.href='http://tstatics.iyuwan.com/files/apk/201605/Iyuwan.apk'
            });
        }

    }

});