删除标记谷歌地图不起作用API v3

Question

i'm currently working on google map and i'm going through a problem i can't solve myself. i've been following some docs and answer on stackOverflow but i can't get it work properly ..

i have one and only one marker on my map, all i want to do is removing it to put a new one each time the dragent event is firing ...

When i'm debugging the code, it seems like my marker ain't deleted from the map or i don't .. i don't really understand the behavior ..

So here is the code :

my google map instance :

    var map = new google.maps.Map(document.getElementById('map-canvas'), {
zoom: levelZoom,
center: new google.maps.LatLng(50.6548670, 3,1888100),
});

the manip :

var markerHome = null;

function deleteCurrentMarkers(){
if (markerHome != null){
    console.log("set markerHome to null");
    markerHome.setMap(null);
    markerHome = null;
}
}

function setRelayMap(dataSource, currentCoords, myFilterObject){
var i;
var lt = currentCoords.lat;
var lg = currentCoords.lng;


deleteCurrentMarkers();
markerHome = new google.maps.Marker({position: new google.maps.LatLng(lt, lg),         map: map, icon: "icoMaps/initPos.png"});
google.maps.event.addListener(map, 'dragend', function() {
    var centerObj = map.getCenter();
    var newObj = {"lat": centerObj.lat(), "lng": centerObj.lng()};
    console.log("in dragend");
    getDataFromServer(newObj, myFilterObject);
});
google.maps.event.addListener(map, 'zoom_changed', function() {
    levelZoom = map.getZoom();
});
    }

can you see anything that could cause my problem ?

thank you for helping :)

Answer 1

When you call deleteCurrentMarkers method your markerHome variable is null. So the code doesn goes into if statement.

function deleteCurrentMarkers(){
if (markerHome != null){ //markerHome is null here!!!
    console.log("set markerHome to null");
    markerHome.setMap(null);
    markerHome = null;
    }
}

Answer 2

I think deleteCurrentMarkers() will never be fired 2nd time cose you fire it only when setRelayMap() is fired. You should fire in "dragend" callback or in getDataFromServer()