为谷歌地图集成搜索表单

Integrating Search Form for Google Maps

本文关键字:搜索表 表单 搜索 集成 谷歌地图      更新时间:2023-09-26

我正在使用Google Maps Javascript V3 API构建一个搜索表单。在执行搜索后,我下面的代码成功地通过了地理坐标,但地图没有更新。我尝试在initialize()中移动codeAddress函数,但搜索按钮不起作用。如何正确地将两者结合起来?

HTML:

<form>    
<input type="text" name="address" id="address" />
<input type="button" class="search_button" value="" onclick="codeAddress()" />    
</form>

JavaScript:

var geocoder;
function initialize() {
  geocoder = new google.maps.Geocoder();
  var mapOptions = {
    center: { lat: 48.509532, lng: -122.643852}
  };
  var map = new google.maps.Map(document.getElementById('map-canvas'),mapOptions);
  var locations = <?php echo json_encode($locations_array); ?>;
  var infowindow = new google.maps.InfoWindow();
  var marker, i;
  for (i = 0; i < locations.length; i++) {  
    marker = new google.maps.Marker({
      position: new google.maps.LatLng(locations[i][1], locations[i][2]),
      animation: google.maps.Animation.DROP,
      map: map
    });
    google.maps.event.addListener(marker, 'click', (function(marker, i) {
      return function() {
        var content = '';
        infowindow.setContent(content);
        infowindow.open(map, marker);
      }
    })(marker, i));
  } 
}
function codeAddress() {
  var address = document.getElementById('address').value;
  geocoder.geocode( { 'address': address}, function(results, status) {
    if (status == google.maps.GeocoderStatus.OK) {
      alert(results[0].geometry.location);
      map.setCenter(results[0].geometry.location);
      var marker = new google.maps.Marker({
        map: map,
        position: results[0].geometry.location
      });
    } else {
      alert('Please try again: ' + status);
    }
  });
}
google.maps.event.addDomListener(window, 'load', initialize);

您的主要问题是映射变量是initialize函数的本地变量,因此它在运行HTML点击函数的全局范围内不可用。

一个解决方案:

var geocoder;
var map;
function initialize() {
    geocoder = new google.maps.Geocoder();
    var mapOptions = {
        center: {
            lat: 48.509532,
            lng: -122.643852
        },
        zoom: 4
    };
    map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

工作小提琴

另一个解决方案:

在initialize函数中定义codeAddress,并使用google.maps.event.addDomListener函数:

google.maps.event.addDomListener(document.getElementsByClassName('search_button')[0],'click',codeAddress);

工作小提琴