点击app分享链接,js判断手机是否安装某款app,有就尝试打开,没有就下载

html:

<h1 class="downlink"> 前往 </h1>

js:

document.addEventListener('DOMContentLoaded', function () {
document.querySelector('.downlink').addEventListener('click', function () {
openApp()
}, false)
}, false) ;
function openApp(){
var ua = window.navigator.userAgent.toLowerCase();
//微信
if(ua.match(/MicroMessenger/i) == 'micromessenger'){
window.location.href='downLoadForPhone';
}else{//非微信浏览器
if (navigator.userAgent.match(/(iPhone|iPod|iPad);?/i)) {
var loadDateTime = new Date();
window.setTimeout(function() {
var timeOutDateTime = new Date();
if (timeOutDateTime - loadDateTime < 5000) {
window.location = "http://www.mffive.com:8080/Five_v1.0.1.apk";//ios下载地址
} else {
window.close();
}
},2000);
window.location = "five://"; //由ios提供
}else if (navigator.userAgent.match(/android/i)) {
var state = null;
try {
window.location = 'five://'; //由android提供
setTimeout(function(){
window.location= "http://www.mffive.com:8080/Five_v1.0.1.apk"; //android下载地址

},500);
} catch(e) {}
}
}
}

对微信可能有问题