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グーグルマップAPIで複数の情報ウィンドウを作成する方法

データがjsonから取得された3つのマーカーをマップに作成します。しかし、マーカーをクリックして情報ウィンドウを開こうとすると、最後のマーカーだけが正しく応答します。助けてください....これはコードです..。

<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
    <script src="http://maps.google.com/maps/api/js?sensor=false" type="text/javascript"></script>
    <script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
    <script src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclusterer/src/markerclusterer.js" type="text/javascript"></script>
</head>
<body>
    <script>
        var json = [
            {
                "title": "Stockholm",
                "lat": 59.3,
                "lng": 18.1,
                "description": "Stockholm is the capital and the largest city of Sweden and constitutes the most populated urban area in Scandinavia with a population of 2.1 million in the metropolitan area (2010)"
            },
            {
                "title": "Oslo",
                "lat": 59.9,
                "lng": 10.8,
                "description": "Oslo is a municipality, and the capital and most populous city of Norway with a metropolitan population of 1,442,318 (as of 2010)."
            },
            {
                "title": "Copenhagen",
                "lat": 55.7,
                "lng": 12.6,
                "description": "Copenhagen is the capital of Denmark and its most populous city, with a metropolitan population of 1,931,467 (as of 1 January 2012)."
            }
        ]
        var myCenter=new google.maps.LatLng(51.508742,-0.120850);
        function initialize()
        {
            var mapProp = {
                center:myCenter,
                zoom:5,
                mapTypeId:google.maps.MapTypeId.ROADMAP
            };
            var map=new google.maps.Map(document.getElementById("googleMap"),mapProp);
            for (var i = 0, length = json.length; i < length; i++) {
                var data=json[i];
                var latLng = new google.maps.LatLng(data.lat, data.lng); 
                // Creating a marker and putting it on the map
                var marker = new google.maps.Marker({
                    position: latLng,
                    map: map,
                    title: data.title
                });
            } 
                var infowindow = new google.maps.InfoWindow({
                    content: data.description
                });

            google.maps.event.addListener(marker, 'click', function() {    
                infowindow.open(map,marker);
            });

        }
        google.maps.event.addDomListener(window, 'load', initialize);
    </script>
    <div id="googleMap" style="width:100%;height:100%;"></div>
</body>

</html>
javascriptgoogle-maps-api-3google-maps-markersinfowindow
18
user2261785

問題は、ループ内でコンテンツを情報ウィンドウに割り当てようとした場合です。次に、マーカーをクリックすると、ループの最後の反復からのコンテンツのみが認識されます。代わりにクロージャが必要です。これを処理する方法はいくつかありますが、通常は次のようにします。

function initialize() {
    var mapProp = {
        center:myCenter,
        zoom:5,
        mapTypeId:google.maps.MapTypeId.ROADMAP
    };
    var map=new google.maps.Map(document.getElementById("googleMap"),mapProp);

    var infowindow =  new google.maps.InfoWindow({
        content: ""
    });

    for (var i = 0, length = json.length; i < length; i++) {
        var data=json[i];
        var latLng = new google.maps.LatLng(data.lat, data.lng); 
        // Creating a marker and putting it on the map
        var marker = new google.maps.Marker({
            position: latLng,
            map: map,
            title: data.title
        });

        bindInfoWindow(marker, map, infowindow, data.description);
    } 
}

function bindInfoWindow(marker, map, infowindow, description) {
    marker.addListener('click', function() {
        infowindow.setContent(description);
        infowindow.open(map, this);
    });
}
42
duncan