使用这个你可以删除地图上的所有标记。

map.clear();

这对你有帮助，对我也有帮助。

你也可以这样做:

function clearMarkers(category){ 
  var i;       

  for (i = 0; i < markers.length; i++) {                          
    markers[i].setVisible(false);        
  }    
}

要从地图中删除所有标记，创建如下函数:

1.addMarker(location):这个函数用于在地图上添加标记

2.clearMarkers():该函数从map中移除所有标记，而不是数组中

3.setMapOnAll(map):这个函数用于在数组中添加标记信息

4.deleteMarkers():该函数通过删除对数组中所有标记的引用来删除它们。

// Adds 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 setMapOnAll(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() {
    setMapOnAll(null);
  }

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

我刚刚尝试了kmlLayer.setMap(null)，它工作。不确定这是否适用于普通的标记，但似乎工作正确。

这是谷歌自己在至少一个样本中使用的方法:

var markers = [];

// Clear out the old markers.
markers.forEach(function(marker) {
  marker.setMap(null);
});
markers = [];

检查谷歌样本完整的代码示例:

https://developers.google.com/maps/documentation/javascript/examples/places-searchbox

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 = [];
}