为什么只有最后一个输入的标记出现在 Google Places Autocomplete 中？答案

【问题标题】：Why only the marker of the last input appears in Google Places Autocomplete?为什么只有最后一个输入的标记出现在 Google Places Autocomplete 中？
【发布时间】：2014-02-15 15:02:39
【问题描述】：

您好，我正在使用具有 4 个输入的 Google 地方信息自动完成功能，自动完成工作正常，但只显示最后一个输入的标记和信息窗口。谁能告诉我问题出在哪里以及为什么其他输入的标记和信息窗口没有出现在地图上？任何答案表示赞赏。

<!DOCTYPE html>
<html>
    <head>
        <title>Place Autocomplete</title>
        <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
        <meta charset="utf-8">

        <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&amp;sensor=false&amp;libraries=places"></script>

        <script>
function initialize() {
    var mapOptions = {
        center: new google.maps.LatLng(40.4700, 49.9600),
        zoom: 10,
        zoomControl: true,
        zoomControlOptions: {
            style: google.maps.ZoomControlStyle.SMALL
        },
        mapTypeControl: true,
        mapTypeControlOptions: {
            style: google.maps.MapTypeControlStyle.DROPDOWN_MENU
        }
    };
    var map = new google.maps.Map(document.getElementById('map-canvas'),
    mapOptions);
    var types = document.getElementById('type-selector');
    map.controls[google.maps.ControlPosition.TOP_LEFT].push(types);
    var autocompleteOptions = {
        componentRestrictions: {
            country: "
az "
        }
    };

    var inputs = document.getElementsByClassName("
controlsInput ");

    for (var i = 0; i < inputs.length; i++) {

        var autocomplete = new google.maps.places.Autocomplete(inputs[i], autocompleteOptions);
        autocomplete.bindTo('bounds', map);

        google.maps.event.addListener(autocomplete, 'place_changed', function () {
            var infowindow = new google.maps.InfoWindow();
            var marker = new google.maps.Marker({
                map: map
            });
            infowindow.close();
            marker.setVisible(false);
            var place = autocomplete.getPlace();
            if (!place.geometry) {
                return;
            }

            // If the place has a geometry, then present it on a map.
            if (place.geometry.viewport) {
                map.fitBounds(place.geometry.viewport);
            } else {
                map.setCenter(place.geometry.location);
                map.setZoom(17); // Why 17? Because it looks good.
            }

            marker.setIcon( /** @type {google.maps.Icon} */ ({
                url: place.icon,
                size: new google.maps.Size(71, 71),
                origin: new google.maps.Point(0, 0),
                anchor: new google.maps.Point(17, 34),
                scaledSize: new google.maps.Size(35, 35)
            }));
            marker.setPosition(place.geometry.location);
            marker.setVisible(true);

            var address = '';
            if (place.address_components) {
                address = [
                (place.address_components[0] && place.address_components[0].short_name || ''), (place.address_components[1] && place.address_components[1].short_name || ''), (place.address_components[2] && place.address_components[2].short_name || '')].join(' ');
            }

            infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
            infowindow.open(map, marker);
        });
    }
    // Sets a listener on a radio button to change the filter type on Places
    // Autocomplete.
    function setupClickListener(id, types) {
        var radioButton = document.getElementById(id);
        google.maps.event.addDomListener(radioButton, 'click', function () {
            autocomplete.setTypes(types);
        });
    }

    setupClickListener('changetype-all', []);
    setupClickListener('changetype-establishment', ['establishment']);
    setupClickListener('changetype-geocode', ['geocode']);
}

google.maps.event.addDomListener(window, 'load', initialize);

            </script>
          </head>
          <body>
            <input id="pac-input" class="controlsInput" type="text" placeholder="Enter the pickup point"><br>
            <input id="pac-input2" class="controlsInput" type="text" placeholder="Enter your destination"><br>
            <input id="pac-input3" class="controlsInput" type="text" placeholder="Enter your destination"><br>
            <input id="pac-input4" class="controlsInput" type="text" placeholder="Enter your destination"><br><br>

        <div hidden="hidden" id="type-selector" class="controls">
            <input type="radio" name="type" id="changetype-all" checked="checked">
            <label for="changetype-all">All</label>

            <input type="radio" name="type" id="changetype-establishment">
            <label for="changetype-establishment">Establishments</label>

            <input type="radio" name="type" id="changetype-geocode">
            <label for="changetype-geocode">Geocodes</label>
        </div>
        <div id="map-canvas" style="width: 600px; height: 380px; "></div>
    </body>
</html>

【问题讨论】：

会不会是关闭问题？尝试将你的 for 循环包装在一个函数中并传入变量。我怀疑你的标记和信息窗口每次都会被覆盖。
您只有一个自动完成对象，它引用最后一个输入字段。 working example

标签： javascript google-maps google-maps-api-3 autocomplete google-maps-markers

【解决方案1】：

一种解决方法：

<script>
var map = null;
          var autocompleteOptions = {
           componentRestrictions: {country: "az"}
          };

function setupAutocomplete(autocomplete,inputs,i) {
            autocomplete[i] = new google.maps.places.Autocomplete(inputs[i], autocompleteOptions);
            autocomplete[i].bindTo('bounds', map);

            google.maps.event.addListener(autocomplete[i], 'place_changed', function() {
              var infowindow = new google.maps.InfoWindow();
              var marker = new google.maps.Marker({
                    map: map
              });  
              infowindow.close();
              marker.setVisible(false);
              var place = autocomplete[i].getPlace();
              if (!place.geometry) {
                return;
              }

              // If the place has a geometry, then present it on a map.
              if (place.geometry.viewport) {
                map.fitBounds(place.geometry.viewport);
              } else {
                map.setCenter(place.geometry.location);
                map.setZoom(17);  // Why 17? Because it looks good.
              }

              marker.setIcon(/** @type {google.maps.Icon} */({
                url: place.icon,
                size: new google.maps.Size(71, 71),
                origin: new google.maps.Point(0, 0),
                anchor: new google.maps.Point(17, 34),
                scaledSize: new google.maps.Size(35, 35)
              }));
              marker.setPosition(place.geometry.location);
              marker.setVisible(true);

              var address = '';
              if (place.address_components) {
                address = [
                  (place.address_components[0] && place.address_components[0].short_name || ''),
                  (place.address_components[1] && place.address_components[1].short_name || ''),
                  (place.address_components[2] && place.address_components[2].short_name || '')
                ].join(' ');
              }

              infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
              infowindow.open(map, marker);
            });
}
        function initialize() {
          var mapOptions = {
            center: new google.maps.LatLng(40.4700, 49.9600),
            zoom: 10,
            zoomControl:true,
            zoomControlOptions: {
              style:google.maps.ZoomControlStyle.SMALL
            },
            mapTypeControl:true,
            mapTypeControlOptions: {
              style:google.maps.MapTypeControlStyle.DROPDOWN_MENU 
            }
          };
          map = new google.maps.Map(document.getElementById('map-canvas'),
            mapOptions);
          var types = document.getElementById('type-selector');
          map.controls[google.maps.ControlPosition.TOP_LEFT].push(types);


          var inputs = document.getElementsByClassName("controlsInput");
          var autocomplete = [];
          for(var i = 0; i < inputs.length; i++) {  
           setupAutocomplete(autocomplete,inputs,i);
          }
          // Sets a listener on a radio button to change the filter type on Places
          // Autocomplete.
          function setupClickListener(id, types) {
            var radioButton = document.getElementById(id);
            google.maps.event.addDomListener(radioButton, 'click', function() {
              for (var i=0 ; i<autocomplete.length; i++) {
                autocomplete[i].setTypes(types);
              }
            });
          }

          setupClickListener('changetype-all', []);
          setupClickListener('changetype-establishment', ['establishment']);
          setupClickListener('changetype-geocode', ['geocode']);
        }

        google.maps.event.addDomListener(window, 'load', initialize);

        </script>

working example

【讨论】：

谢谢！但是有一个小问题：当输入字段改变时，之前的标记并没有消失。我曾经像我的答案一样解决它，但没有成功
你指的是什么“答案”？
很抱歉，由于声誉问题，我无法回答自己的问题所以这里是我所做的更改：var map = null; var infowindow = []; var marker = [];
...function setupAutocomplete(autocomplete,inputs,i) { autocomplete[i] = new google.maps.places.Autocomplete(inputs[i], autocompleteOptions); autocomplete[i].bindTo('bounds', map); google.maps.event.addListener(autocomplete[i], 'place_changed', function() { infowindow[i] = new google.maps.InfoWindow(); marker[i] = new google.maps.Marker({
如果没有“答案”，请编辑您的问题以包含更新的代码，或使用新问题创建一个新问题。