//html代码中 的 a 标签，以微信为例，默认的是调用weixin scheme，去打开本机的微信，如果没有则跳转到相应连接
<a href="weixin://" class="btn-download">立即打开</a> // 为btn-download 绑定事件，如果在500ms内，没有解析到协议，那么就会跳转到下载链接 var appstore, ua = navigator.userAgent; if(ua.match(/Android/i)){ appstore = ‘market://search?q=com.singtel.travelbuddy.android‘; } if(ua.match(/iphone|ipod|ipad/)){ appstore = "https://itunes.apple.com/cn/app/wei-xin/id414478124?mt=8&ign-mpt=uo%3D4"; } function applink(fail){ return function(){ var clickedAt = +new Date; // During tests on 3g/3gs this timeout fires immediately if less than 500ms. setTimeout(function(){ // To avoid failing on return to MobileSafari, ensure freshness! if (+new Date - clickedAt < 2000){ window.location = fail; } }, 500); }; } $(‘.icon-download, .btn-download‘)[0].onclick = applink(appstore);