那位大神来帮忙看下 唤起淘宝APP的js优化

[qq_21461715]

(function(scope, wakeup) {
    if (!scope.wakeup) {scope.wakeup = wakeup();}//这一行会在打包时修改成不同版本，修改时请谨慎
})(window, function() {
    var h5_uid = document.cookie.match(/(?:^|\s)cna=([^;]+)(?:;|$)/),
        load_chain = [];

    if (h5_uid) {
        h5_uid = h5_uid[1];
    }

    function url2obj(url) {
        var re = {},
            unUrl,
            params;

        if (url.length && url.substr(0, 5) !== 'data:') {
            //将query前后分开
            unUrl = url.split('?');

            //无query或?有多个
            if (unUrl.length == 1) {
                unUrl = url.split('#');
                if (unUrl.length >= 2) {
                    unUrl = [unUrl[0], '#' + unUrl.slice(1).join('#')];
                } else {
                    unUrl = [unUrl[0], ''];
                }
            } else if (unUrl.length > 2) {
                unUrl = [unUrl[0], unUrl.slice(1).join('?')];
            }

            //尝试处理protocol
            unUrl[0] = unUrl[0].split('//');
            if (unUrl[0].length !== 2) {
                //与预期不符的统一处理
                unUrl[0] = [undefined, unUrl[0].join('//')];
            }

            if (unUrl[0][0] !== undefined) {
                re.protocol = unUrl[0][0];
            }
            re.path = unUrl[0][1];

            //取query部分
            //先把hash处理掉
            params = unUrl[1].split('#');
            if (params.length >= 2) {
                re.hash = params.slice(-1)[0];
                params = params.slice(0, -1).join('#');
            } else {
                params = params[0];
            }

            //将query分成键值对
            if (params) {
                re.params = {};
                params = params.split('&');
                for (var i = 0, maxi = params.length; i < maxi; i++) {
                    params[i] = params[i].split('=');
                    if (params[i][1] !== undefined) {
                        params[i][1] = params[i].slice(1).join('=');
                        try {
                            params[i][1] = decodeURIComponent(params[i][1]);
                        } catch(e) {
                        }
                    }
                    re.params[params[i][0]] = params[i][1];
                }
            }
        }

        return re;
    }

    function obj2url(obj) {
        var re = [],
            query = [],
            query_added = false;

        if (obj.protocol !== undefined) {
            re.push(obj.protocol + '//');
        }
        if (obj.path !== undefined) {
            obj.path && re.push(obj.path);
        }

        if (obj.params !== undefined) {
            for (var key in obj.params) {
                if (!query_added) {
                    re.push('?');
                    query_added = true;
                }
                if (obj.params.hasOwnProperty(key)) {
                    if (obj.params[key] !== undefined) {
                        query.push([key, '=', encodeURIComponent(obj.params[key])].join(''));
                    } else {
                        query.push(key);
                    }
                }
            }
            re.push(query.join('&'));
        }

        obj.hash && re.push('#' + obj.hash);

        return re.join('');
    }

    function appendParams(url) {
        var points = ['ali_trackid', 'refpid', 'pid'],
            currentUrl = url2obj(location.href),
            params = {};

        if (url.params === undefined) {
            url.params = {};
        }

        if (currentUrl.params) {
            //透传参数
            for (var key in currentUrl.params) {
                if (!url.params.hasOwnProperty(key)) {
                    url.params[key] = currentUrl.params[key];
                }
            }

            //添加point参数
            params.from = 'h5';

            for (var i = 0, maxi = points.length; i < maxi; i++) {
                if (currentUrl.params[points[i]]) {
                    params[points[i]] = currentUrl.params[points[i]];
                }
            }

            if (h5_uid) {
                params.h5_uid = h5_uid;
            }

            delete currentUrl.params;
            delete currentUrl.hash;
            params.url = obj2url(currentUrl);

            url.params.point = JSON.stringify(params);
        }

        return url;
    }

    function useAnchorLink(url, pending) {
        var a = document.createElement('a'),
            e = new MouseEvent('click');

        a.setAttribute('href', url);
        a.style.display = 'none';

        function add() {
            document.body.appendChild(a);
            a.dispatchEvent(e);
        }

        doWhenLoad(add, pending);
    }

    function callInIframe(url, pending) {
        var iframe = document.createElement('iframe');

        iframe.id = 'callapp_iframe_' + Date.now();
        iframe.frameborder = '0';
        iframe.style.cssText = 'display:none;border:0;width:0;height:0;';

        function add() {
            document.body.appendChild(iframe);
            iframe.src = url;
        }

        doWhenLoad(add, pending);
    }

    function doWhenLoad(add, pending) {
        if (document.readyState == "complete" || document.readyState == "loaded") {
            add();
        } else {
            if (pending !== undefined) {
                load_chain.push(add);
            } else {
                window.addEventListener("load", add);
            }
        }
    }

    function goldsend(data) {
        var img = new Image(),
            id = "_live_" + Math.random(),
            target = url2obj('//wgo.mmstat.com/wkp.try.d');

        window[id] = img;

        img.onload = img.onerror = function() {
            window[id] = null;
        };

        target.params = {
            'cache': Math.floor(Math.random() * 268435456).toString(16),
            'gmkey': 'EXP',
            'gokey': JSON.stringify(data),
            'cna': '',
            'spm-cnt': '0.0.0.0',
            'isbeta': 9,
            'logtype': 2
        };

        img.src = obj2url(target);

        img = null;
    }

    function normal_encode(obj, scheme) {
        obj.protocol = scheme;

        return obj2url(obj);
    }

    function tbopen_encode(obj) {
        var tbopen = 'tbopen://m.taobao.com/tbopen/index.html?action=ali.open.nav&module=h5&bootImage=0&h5Url=';

        return tbopen + encodeURIComponent(obj2url(obj));
    }

    function wakeup(url, options) {
        var target = url2obj(url),
            ua = navigator.userAgent,
            isiOS = /iPhone|iPad|iPod/i.test(ua),
            isIE = /Trident/i.test(ua),
            iOS9SafariFix,
            AndroidBCFix,
            iOS_version;

        if (isIE) {
            return;
        }

        options = options || {};

        goldsend({
            h5_uid: h5_uid || '',
            url: url,
            ua: navigator.userAgent,
            to: options.scheme || 'aliapp_tb',
            v: '0.1.13'
        });

        appendParams(target);

        //iOS >= 9.0且是Safari，需要用a标签
        if (isiOS && /Safari/i.test(ua)) {
            iOS_version = ua.match(/Version\/([\d\.]+)/i);
            if (iOS_version && iOS_version.length == 2) {
                iOS_version = +iOS_version[1];
                if (iOS_version >= 9) {
                    iOS9SafariFix = true;
                }
            }
        }

        //百川需要用tbopen
        if (!isiOS && /AliApp\(BC\/\d+/i.test(ua)) {
            AndroidBCFix = true;
        }

        if (iOS9SafariFix) {
            /**
             * iOS9以上的Safari里，使用iframe打开url scheme没有任何反应
             */
            if (options.scheme === 'tbopen') {
                target = tbopen_encode(target);
            } else {
                target = normal_encode(target, options.scheme || 'taobao:');
            }

            useAnchorLink(target, options.toload);
        } else if (AndroidBCFix && options.scheme === undefined) {
            callInIframe(tbopen_encode(target), options.toload);
        } else {
            /**
             * 在如网易的webview里，iframe的生成需要等待DOM的load事件。其表现和Safari中的非常类似，怀疑是WebKitWebView。
             */
            if (options.scheme === 'tbopen') {
                target = tbopen_encode(target);
            } else {
                target = normal_encode(target, options.scheme || 'taobao:');
            }

            callInIframe(target, options.toload);
        }
    }

    wakeup.loaded = function() {
        while(load_chain.length) {
            try {
                load_chain.shift()();
            } catch (e) {}
        }
    };

    return wakeup;
});

上面是淘宝自己唤起手机淘宝的APP的js代码
但是好复杂哦
希望那位大神帮忙优化下js 能直接唤起https://item.taobao.com/item.htm?id=539608081526这样的链接即可
本来用Iframe唤起 但是ios9以上版本都不支持唤起, 麻烦大神精简个能唤起的代码给小弟 小弟对JS实在不擅长
大神最好能帮我把上面的代码详细注释下 我也理解下这个JS的作用

[Go 旅城通票]

location.href='https://item.taobao.com/item.htm?id=539608081526'

[qq_21461715]

引用 1 楼 showbo 的回复:

location.href='https://item.taobao.com/item.htm?id=539608081526'

你这样多任何都没有判断 而且淘宝是要taobao://唤起的 可能你不理解淘宝的唤起 也没看到js

<script>

function openApp(url) {
	var ua = navigator.userAgent.toLowerCase();
	var tb = url.replace("http://", "").replace("https://", "");
	if( ua.match(/iphone os 9/i) == "iphone os 9" ) {
		window.location = "taobao://" + tb;
		window.setTimeout(function() {window.location = url;},4000);
	}else{
		var ifr = document.createElement('iframe');
		ifr.src = 'taobao://' + tb;
		ifr.style.display = 'none';
		document.body.appendChild(ifr);
		window.location = url;}}

//只在有优惠券的时候执行
openApp('https://item.taobao.com/item.htm?id=539608081526');

</script>

这个判断是ios 9系统 我需要判断 ios 9以上的 包括ios 10系统等等都支持唤起