谷歌地图 - 拖动标记，GetPosition 总是返回相同的位置

Question

So I have a for loop which creates more than 100 markers. When I drag a random marker I get always the same position written in the console. But the "Point" value is different when I drag another marker. So the question is why I am getting always the same position? If I try with only 1 marker, the code is working.

Piece of code:

coordinates.forEach(function(entry) {   

    if(!isOdd(number)){
        marker_lat = entry;
        number++;
    }else{
        marker_lng = entry;             
        var myLatlng = new google.maps.LatLng(parseFloat(marker_lat),parseFloat(marker_lng));

        marker_icon = "red.png";

          mark = new google.maps.Marker({
           position: myLatlng,
           map: map,
           title: number,
           icon: marker_icon,  
           draggable:true
         });                
        number++;

        google.maps.event.addListener(mark, 'dragend', function() { 
                id_point = $(this).attr("title");
                console.log("Point: "+id_point);
                console.log(mark.getPosition().lat());// Always the same position
                console.log(mark.getPosition().lng());// Always the same position
        });
    }
}); 

Answer 1

The marker is passed as a parameter to the function by the listener. Try this code:

google.maps.event.addListener(mark, 'dragend', function(m) { 
    id_point = $(this).attr("title");
    console.log("Point: "+id_point);
    console.log(m.latLng.lat());
    console.log(m.latLng.lng()); /* different from your
                                    code.  Can't really
                                    test right now, but
                                    this seems to work on
                                    the last project I
                                    did. */
});

In addition to this, you can also call getPosition() on this :

google.maps.event.addListener(mark, 'dragend', function(m) { 
    id_point = this.title;
    console.log("Point: "+id_point);
    console.log(this.getPosition().lat()); // same as below
    console.log(m.latLng.lat());
});