H5中调起微信这么实现，如果未安装则提示未安装 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no">
        <title>判断手机是否安装微信</title>
    </head>
    <body>
    <a href="javascript:testApp('weixin://')" class="dl-btn" id="download">打开微信</a> 
    <script>
    function testApp(url) { 
          var timeout, t = 1000, hasApp = true; 
          setTimeout(function () { 
            if (!hasApp) { 
                //没有安装微信
                var r=confirm("您没有安装微信，请先安装微信!");
                if (r==true){
                    location.href="http://weixin.qq.com/"
                }
            }else{
                //安装微信
            }
            document.body.removeChild(ifr); 
          }, 2000) 
          
          var t1 = Date.now(); 
          var ifr = document.createElement("iframe"); 
          ifr.setAttribute('src', url); 
          ifr.setAttribute('style', 'display:none'); 
          document.body.appendChild(ifr); 
          timeout = setTimeout(function () { 
             var t2 = Date.now(); 
             if (!t1 || t2 - t1 < t + 100) { 
               hasApp = false; 
             } 
          }, t); 
        } 
    </script>
    </body>
</html>

 

posted @ 2019-12-04 17:50  herry菌  阅读(194)  评论(0)  编辑  收藏  举报