Question

我尝试在googlemaps上制作多个标记并从数据库中获取数据。这是我的代码

<script>
<?php 


$query =  $db->query('SELECT * FROM tbl_kabkot WHERE 1=1 AND latitude !=0 AND longitude !=0');
  while($row = $query->fetch()){                            

                               $nama_kabkot = $row[nama_kabkot];
                               $longitude = $row[longitude];                              
                               $latitude = $row[latitude]; 


 ?>
      var markers = [
                      [<?= $nama_kabkotv ?>, <?= $latitude ?>, <?= $longitude ?>]
];
<?php } ?>

function initMap() {
    var latlng = new google.maps.LatLng(-33.92, 151.25);
    var myOptions = {
        zoom: 10,
        center: latlng,
        mapTypeId: google.maps.MapTypeId.ROADMAP,
        mapTypeControl: false
    };
    var map = new google.maps.Map(document.getElementById("peta"),myOptions);
    var infowindow = new google.maps.InfoWindow(), marker, i;
    for (i = 0; i < markers.length; i++) {  
        marker = new google.maps.Marker({
            position: new google.maps.LatLng(markers[i][1], markers[i][2]),
            map: map
        });
        google.maps.event.addListener(marker, 'click', (function(marker, i) {
            return function() {
                infowindow.setContent(markers[i][0]);
                infowindow.open(map, marker);
            }
        })(marker, i));
    }
}
</script>

但是此代码仅显示数据库中的一个值。如何用数据库显示多个标记？

Answer 1

由于class MyComponent extends Component { constructor(props){ super(props) this.state = {isAuthenticated: false}; } render() { return( <div> Hello {this.state.isAuthenticated ? 'friend' : 'stranger'} ! </div> ); } }，初始sql查询有一个冗余的where子句，但我认为这是用于测试的。原始代码中的1=1变量在循环的每次迭代中被覆盖，因此数组只有一个项目。

markers

Answer 2

<script>

  // The following example creates complex markers to indicate beaches near
  // Sydney, NSW, Australia. Note that the anchor is set to (0,32) to correspond
  // to the base of the flagpole.

  function initMap() {


     var markerscenter = [
    ['Bondi Beach', -33.890542, 151.274856,],
    ['Bondi Beach2', -33.90542, 151.2748,]

  ];

    var map = new google.maps.Map(document.getElementById('map_canvas'), {
      zoom: 10,
      center: {lat:Number(markerscenter[0][0]), lng:Number(markerscenter[0][1])}
    });

    setMarkers(map);
  }

  // Data for the markers consisting of a name, a LatLng and a zIndex for the
  // order in which these markers should display on top of each other.


   var markers = [
    ['Bondi Beach', -33.890542, 151.274856,],
    ['Bondi Beach2', -33.90542, 151.2748,]

  ];                        
// Info Window Content
var infoWindowContent = [
   'desc1','desc2'

  ];               

  function setMarkers(map) {

    var image = 'markeimage.png';



     var infoWindow = new google.maps.InfoWindow(), marker, i;
    for (var i = 0; i < markers.length; i++) {


      //var beach = beaches[i];
      var marker = new google.maps.Marker({
        position: {lat:Number(markers[i][0]), lng: Number(markers[i][1])},
        map: map,
        icon: image,

      });

    google.maps.event.addListener(marker, 'mouseover', (function(marker, i) {
        return function() {
            infoWindow.setContent(infoWindowContent[i][0]);
            infoWindow.open(map, marker);
        }
    })(marker, i));
    }

  }
</script>

来自php和mysql的googlemaps上的多个标记

2 个答案: