如何从 Google 版本地图中的拖动标记中获取格式化地址

IT技术 javascript google-maps google-maps-api-3 geolocation google-maps-markers
2021-03-07 07:29:04

我制作了一个 Google 地图，可以让您在文本字段中输入地址。然后它会导航到您在文本字段中输入的地址，并留下一个可拖动的标记，拖动时会显示纬度和经度以及地理定位地址。

我不想显示上述地址，而是希望当您拖动标记以在底角显示标记的地址而不是文本字段中输入的地址。

我尝试了很多方法都无济于事。lonlat[0].formatted_address 是我尝试过的一些东西之一。

我从谷歌得到了我的参考

我的代码如下：

<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps JavaScript API v3 Example: Geocoding Simple</title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script src="http://maps.google.com/maps/api/js?v=3.5&amp;sensor=false"></script>

<script type="text/javascript">
var geocoder;
var map;
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var myOptions = {
zoom: 8,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}

map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
}

function codeAddress() {
var address = document.getElementById("address").value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);

var marker = new google.maps.Marker({
    map: map,
    draggable: true,
    position: results[0].geometry.location

});
   // Javascript//
   google.maps.event.addListener(marker, 'dragend', function(evt){
   document.getElementById('current').innerHTML = '<p>Marker dropped: Current Lat: ' + evt.latLng.lat().toFixed(3) + ' Current Lng: ' + evt.latLng.lng().toFixed(3) + '</p>';
   });

   google.maps.event.addListener(marker, 'dragstart', function(evt){
   document.getElementById('current').innerHTML = '<p>Currently dragging marker...</p>';
   });

   google.maps.event.addListener(marker, 'dragend', function(evt){
   document.getElementById('info').innerHTML = '<p>Address:  ' + results[0].formatted_address + '</p>';
   });

   google.maps.event.addListener(marker, 'dragstart', function(evt){
   document.getElementById('info').innerHTML = '<p>Currently dragging marker...</p>';
   });



 map.setCenter(marker.position);
 marker.setMap(map);

  } else {
    alert("Geocode was not successful for the following reason: " + status);
    }
     });
        }
</script>

<style type="text/css">
#controls {
position: absolute;
bottom: 1em;
left: 100px;
width: 400px;
z-index: 20000;
padding: 0 0.5em 0.5em 0.5em;
}
html, body, #map_canvas {
        margin: 0;
        width: 100%;
        height: 100%;
}
</style>
</head>
<body onLoad="initialize()">
<div id="controls">
<input id="address" type="textbox" value="Sydney, NSW">

<input type="button" value="Geocode" onClick="codeAddress()">
<div id="current" style="background-color:white;">Nothing yet...</div>
<div id="info" style="background-color:white;">Address:</div>
</div>
</div>


<div id="map_canvas"></div>


</body>
</html>
1个回答

您需要使用反向地理编码服务（如您链接到的示例中所示）来检索格式化的地址。

该示例中的此代码调用反向地理编码器并使用响应显示其返回的 formatted_address：

function geocodePosition(pos) {
  geocoder.geocode({
    latLng: pos
  }, function(responses) {
    if (responses && responses.length > 0) {
      updateMarkerAddress(responses[0].formatted_address);
    } else {
      updateMarkerAddress('Cannot determine address at this location.');
    }
  });
}

这是调用它的 dragend 侦听器：

  google.maps.event.addListener(marker, 'dragend', function() {
    updateMarkerStatus('Drag ended');
    geocodePosition(marker.getPosition());
  });

这是一个工作示例（将从反向地理编码器收到的地址放入信息窗口）

代码片段：

var geocoder;
var map;
var marker;
var infowindow = new google.maps.InfoWindow({
  size: new google.maps.Size(150, 50)
});

function initialize() {
  geocoder = new google.maps.Geocoder();
  var latlng = new google.maps.LatLng(-34.397, 150.644);
  var mapOptions = {
    zoom: 8,
    center: latlng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  }
  map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
  google.maps.event.addListener(map, 'click', function() {
    infowindow.close();
  });
}

function geocodePosition(pos) {
  geocoder.geocode({
    latLng: pos
  }, function(responses) {
    if (responses && responses.length > 0) {
      marker.formatted_address = responses[0].formatted_address;
    } else {
      marker.formatted_address = 'Cannot determine address at this location.';
    }
    infowindow.setContent(marker.formatted_address + "<br>coordinates: " + marker.getPosition().toUrlValue(6));
    infowindow.open(map, marker);
  });
}

function codeAddress() {
  var address = document.getElementById('address').value;
  geocoder.geocode({
    'address': address
  }, function(results, status) {
    if (status == google.maps.GeocoderStatus.OK) {
      map.setCenter(results[0].geometry.location);
      if (marker) {
        marker.setMap(null);
        if (infowindow) infowindow.close();
      }
      marker = new google.maps.Marker({
        map: map,
        draggable: true,
        position: results[0].geometry.location
      });
      google.maps.event.addListener(marker, 'dragend', function() {
        geocodePosition(marker.getPosition());
      });
      google.maps.event.addListener(marker, 'click', function() {
        if (marker.formatted_address) {
          infowindow.setContent(marker.formatted_address + "<br>coordinates: " + marker.getPosition().toUrlValue(6));
        } else {
          infowindow.setContent(address + "<br>coordinates: " + marker.getPosition().toUrlValue(6));
        }
        infowindow.open(map, marker);
      });
      google.maps.event.trigger(marker, 'click');
    } else {
      alert('Geocode was not successful for the following reason: ' + status);
    }
  });
}

google.maps.event.addDomListener(window, "load", initialize);
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

#map_canvas {
  height: 100%;
}

@media print {
  html,
  body {
    height: auto;
  }
  #map_canvas {
    height: 650px;
  }
}
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></script>
<div>
  <input id="address" type="textbox" value="Sydney, NSW">
  <input type="button" value="Geocode" onclick="codeAddress()">
</div>
<div id="map_canvas" style="height:90%;top:30px"></div>

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