• 方法一
  • 说明: 当点击打开某一app按钮时, 判断手机是否安装此款app, 有的话就直接打开app首页, 没安装app就直接跳转对应的app store.

        var ua = window.navigator.userAgent.toLowerCase();  
        var url_ios =  'weixin://';
        var url_ios_download =  'http://www.wjtr.com/download/index.html';
        var url_android = 'weixin://';
        var url_android_download = 'https://itunes.apple.com/cn/app/jian-kang-mao-rang-yun-dong/id966436668?mt=8';
        console.log(url_android);
        
        //通过window.navigator.userAgent来判断当前设备是IOS还是Android。
        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 loadTime = new Date();
                location.href = url_ios;
                setTimeout(function(){
                    var outTime = new Date()
                    if(outTime - loadTime > 800){
                        location.href = url_ios_download;
                    }           
                },1000)
            }else if (navigator.userAgent.match(/android/i)) {  
                var loadTime = new Date();
                location.href = url_android;
                setTimeout(function(){
                    location.href = url_android_download;
                },200)
            }  
        }  

• 方法二

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 = "";//ios下载地址  
                } else {  
                window.close();  
                }  
            },2000);  
            window.location = "schema://";  
          }else if (navigator.userAgent.match(/android/i)) {  
            var state = null;  
            try {  
                window.location = 'weixin://';  
                $('#btn2').hide();
                setTimeout(function(){  
                    window.location= "https://itunes.apple.com/cn/app/jian-kang-mao-rang-yun-dong/id966436668?mt=8"; //android下载地址  

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