Google Map API2到API3 - 未捕获的TypeError：无法读取未定义的属性“Map”

Question

我正在忙着将我的地图从api2移动到3并且沿途遇到一些颠簸。当使用下面的代码时，我得到一个灰色块，并且地图不会渲染。控制台说＆＃34; Uncaught TypeError：无法读取属性＆＃39; Map＆＃39;未定义＆＃34;。我正在编辑别人的工作，所以我并没有完全了解这一点，如果您能发现某些内容或需要更多细节，请告诉我。

// Initialise the required maps

Tour_Map = new Object();
Tour_Map.maps = new Array();

if (typeof (Tour_Map.GoogleMap) == 'undefined' || (!Tour_Map.GoogleMap instanceof Object)) {

Tour_Map.GoogleMap = function() {

    function Map (init, options) {

        // Check that we have the required information.
        if (init == null
                || typeof (init) != 'object'
                || typeof (init.map_container) == 'undefined') {
            alert('init failed');
            return false;
        }

        // Only proceed if the map container is visible     
        if ($('#' + init.map_container).is(":visible")) {

            // Set the default map options.
            var map_options = {
                'url': null,
                'zoom': 4,
                'lat': -3.5777508205127946,
                'lng': 28.1195068359375,
                'enableGoogleBar': 0,
                'googleBarOptions': {style: "new"},
                'directions': null,
                'markers': null,
                'route': null,
                'map': null
            }

            //Create map 
            var __map = new google.maps.Map(
                document.getElementById(init.map_container), {
                  center: new google.maps.LatLng(map_options.lat, map_options.lng),
                  zoom: map_options.zoom,
                  mapTypeId: google.maps.MapTypeId.ROADMAP
            });


            // Return the Google Map
            this.__map = __map;

            return this;

        } // if map container is visible

        else {
            return null;
        }

    } // Map constructor end

    // Return our publically-accessible object.
    return ({Map: Map});

}();

}
$(window).load(function() {
// Create the Google Maps by looping through the maps array created earlier 
if (typeof (Tour_Map.maps) !== 'undefined') {
    for (var i in Tour_Map.maps) {
            Tour_Map.maps[i].map = new Tour_Map.GoogleMap.Map(Tour_Map.maps[i].init,           Tour_Map.maps[i].options);
    }
}
});

循环允许创建多个地图，并且在带有地图特色的页面上，有以下代码：

DSA_Map.maps.push({
                    init : {
                        map_container: 'map_branches'
                    },
                    options: {
                        zoom : 5,
                        lat : -23.92175976307374, 
                        lng : 24.120724868774414,
                        directions: 1,
                        markers : [{exp:channel:entries orderby="title" sort="asc" channel="locations" dynamic="off" category="12|13|14" limit="5000" disable="{lv_disable_all}" {lv_tag_caching}}{exp:tied_entries this_entry_id="{entry_id}" tie="<branches" allow_php="yes" orderby="title" sort="asc"}<?php $locations[] = '<dd class="location">{title} <a class="expander">+</a></dd>'."\n";$locations[] = '<dd class="branch"><a href="#map_branches" id="marker_index'.$i++.'">{tied:title}</a></dd>'."\n"; ?>{embed="branch-finder/.js" entry_id="{tied:entry_id}" count="<?php echo $i;$i++; ?>"},{/exp:tied_entries}{/exp:channel:entries}]
                    }
                });