在谷歌地图API v2,如果我想删除所有的地图标记,我可以简单地做:

map.clearOverlays();

我如何做到这一点在谷歌地图API v3?

看看参考API,我不清楚。


当前回答

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。

其他回答

一个简单明了的rolinger答案的应用。

function placeMarkerAndPanTo(latLng, map) {
      while(markersArray.length) { markersArray.pop().setMap(null); }
      var marker = new google.maps.Marker({
        position: latLng,
        map: map
      });
      map.panTo(latLng);

      markersArray.push(marker) ;
    }

解决方法很简单。你可以使用方法:marker.setMap(map);。在这里,您定义大头针将出现在哪个映射上。

所以,如果你在这个方法中设置为null (marker.setMap(null);),大头针就会消失。


现在,你可以写一个函数女巫,而使所有的标记消失在你的地图。

您只需添加将您的大头针放入数组中并使用标记声明它们。Push (your_new pin)或以下代码为例:

// 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);
}

这是一个可以设置或消失映射中数组的所有标记的函数:

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

为了消除所有的标记,你应该调用null函数:

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

并且,删除和消失,你所有的标记,你应该重置你的标记数组像这样:

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

这是我的完整代码。这是我能化简的最简单的形式。 请注意,你可以用你的密钥谷歌API替换代码中的YOUR_API_KEY:

<!DOCTYPE html>
<html>
  <head>
  <title>Remove Markers</title>
  <style>
     /* Always set the map height explicitly to define the size of the div
     * element that contains the map. */
     #map {
       height: 100%;
       }
  </style>
</head>
<body>

<div id="map"></div>
<p>Click on the map to add markers.</p>
<script>

  // In the following example, markers appear when the user clicks on the map.
  // The markers are stored in an array.
  // The user can then click an option to hide, show or delete the markers.
  var map;
  var markers = [];

  function initMap() {
    var haightAshbury = {lat: 37.769, lng: -122.446};

    map = new google.maps.Map(document.getElementById('map'), {
      zoom: 12,
      center: haightAshbury,
      mapTypeId: 'terrain'
    });

    // This event listener will call addMarker() when the map is clicked.
    map.addListener('click', function(event) {
      addMarker(event.latLng);
    });

    // Adds a marker at the center of the map.
    addMarker(haightAshbury);
  }

   // 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);
  }

  // Shows any markers currently in the array.
  function showMarkers() {
    setMapOnAll(map);
  }

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

</script>
   <script async defer
    src="https://maps.googleapis.com/maps/api/js key=YOUR_API_KEY&callback=initMap">
   </script>
</body>
</html>

您可以咨询谷歌开发人员或完整的文档,也,谷歌开发人员网站。

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

你也可以这样做:

function clearMarkers(category){ 
  var i;       

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

在新版本v3上,他们建议保持在数组中。如下。

参见overlay-overview中的示例。

var map;
var markersArray = [];

function initialize() {
  var haightAshbury = new google.maps.LatLng(37.7699298, -122.4469157);
  var mapOptions = {
    zoom: 12,
    center: haightAshbury,
    mapTypeId: google.maps.MapTypeId.TERRAIN
  };
  map =  new google.maps.Map(document.getElementById("map_canvas"), mapOptions);

  google.maps.event.addListener(map, 'click', function(event) {
    addMarker(event.latLng);
  });
}

function addMarker(location) {
  marker = new google.maps.Marker({
    position: location,
    map: map
  });
  markersArray.push(marker);
}

// Removes the overlays from the map, but keeps them in the array
function clearOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
  }
}

// Shows any overlays currently in the array
function showOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(map);
    }
  }
}

// Deletes all markers in the array by removing references to them
function deleteOverlays() {
  if (markersArray) {
    for (i in markersArray) {
      markersArray[i].setMap(null);
    }
    markersArray.length = 0;
  }
}