下面来自Anon的效果很好，尽管在反复清除覆盖时有闪烁。

简单地做以下几点:

I.声明一个全局变量:

var markersArray = [];

2定义一个函数:

function clearOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
  }
}

3在调用以下函数之前，在'markerArray'中插入标记:

markersArray.push(marker);
google.maps.event.addListener(marker,"click",function(){});

IV.在任何需要的地方调用clearoverlay()函数。

就是这样! !

希望这对你有所帮助。

只需要走过标记并将它们从map中移除，然后是空的maps标记数组:

var markers = map.markers;
for(var i = 0; i < markers.length; i++) {
    markers[i].setMap(null);
}
map.markers = [];

我找到了一个简单的解决方法(我认为):

var marker = new google.maps.Marker();

function Clear(){
     marker.setMap(null);
}

在V3中似乎还没有这样的函数。

人们建议将对地图上所有标记的引用保存在一个数组中。然后当你想把它们全部删除时，只需要在数组中循环，并对每个引用调用. setmap (null)方法。

更多信息/代码请参见这个问题。

我的版本:

google.maps.Map.prototype.markers = new Array();

google.maps.Map.prototype.getMarkers = function() {
    return this.markers
};

google.maps.Map.prototype.clearMarkers = function() {
    for(var i=0; i<this.markers.length; i++){
        this.markers[i].setMap(null);
    }
    this.markers = new Array();
};

google.maps.Marker.prototype._setMap = google.maps.Marker.prototype.setMap;

google.maps.Marker.prototype.setMap = function(map) {
    if (map) {
        map.markers[map.markers.length] = this;
    }
    this._setMap(map);
}

该代码是此代码http://www.lootogo.com/googlemapsapi3/markerPlugin.html的编辑版本，我删除了手动调用addMarker的需要。

Pros

这样做可以使代码保持紧凑和在一个地方(不会污染名称空间)。 你不再需要自己跟踪标记你可以通过调用map。getmarkers()找到地图上的所有标记

Cons

Using prototypes and wrappers like I did now makes my code dependent on Google code, if they make a mayor change in their source this will break. If you don't understand it then you won't be able to fix it if does break. The chances are low that they're going to change anything which will break this, but still.. If you remove one marker manually, it's reference will still be in markers array. (You could edit my setMap method to fix it, but at the cost of looping trough markers array and removing the reference)

我不知道为什么，但是，设置setMap(null)到我的标记并不适用于我，当我使用DirectionsRenderer。

在我的情况下，我必须调用setMap(null)到我的DirectionsRenderer以及。

就像这样:

var directionsService = new google.maps.DirectionsService();
var directionsDisplay = new google.maps.DirectionsRenderer();

if (map.directionsDisplay) {
    map.directionsDisplay.setMap(null);
}

map.directionsDisplay = directionsDisplay;

var request = {
    origin: start,
    destination: end,
    travelMode: google.maps.TravelMode.DRIVING
};

directionsDisplay.setMap(map);
directionsService.route(request, function (result, status) {
    if (status == google.maps.DirectionsStatus.OK) {
        directionsDisplay.setDirections(result);
    }
});

在这里你可以找到一个如何删除标记的例子:

https://developers.google.com/maps/documentation/javascript/examples/marker-remove?hl=es

// Add a marker to the map and push to the array.
function addMarker(location) {
  var marker = new google.maps.Marker({
    position: location,
    map: map
  });
  markers.push(marker);
}

// Sets the map on all markers in the array.
function setAllMap(map) {
  for (var i = 0; i < markers.length; i++) {
    markers[i].setMap(map);
   }
}

// Removes the markers from the map, but keeps them in the array.
function clearMarkers() {
  setAllMap(null);
}

// Deletes all markers in the array by removing references to them.
function deleteMarkers() {
  clearMarkers();
  markers = [];
}