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javascript - Google Places Autocomplete 不适用于动态生成的输入元素

转载 作者：塔克拉玛干 更新时间：2023-11-02 22:15:29 24 4
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自动完成在多个静态输入字段上完美运行。但是当我通过按钮自动完成添加输入字段时，这些输入字段不起作用。也许问题正在关闭，但我不确定，因为我的 Javascript 很弱。谁能帮帮我？

代码如下:

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

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&libraries=places"></script>
<script>
var map = null;
var marker = [];
var autocomplete = [];
var inputs = [];
var types = [];
var autocompleteOptions = {
 componentRestrictions: {country: "az"}
};

这个函数最多动态创建 5 个输入字段(我把这个函数放在初始化方法中，但它也不起作用):

$(document).ready(function(){
var count = 2;
$("#addInputField").click(function(){
    count++;
    $("#inputlar").append("<input id='pac-input" + count + "' class='controlsInput' type='text' placeholder='Enter your destination' /> <br />");
    var newInput = [];
    var newEl = document.getElementById('pac-input' + count);
    newInput[count-1] = newEl;
    setupAutocomplete(autocomplete, newInput, count-1);
    if (count === 7) {
        $("#addInputField").remove();
    }
});

});

此函数从初始化方法调用，用于维护多个输入的自动完成。完美运行:

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();
          if (marker[i] && marker[i].setMap) {
             marker[i].setMap(null);
             marker[i] = null;
          }
          marker[i] = new google.maps.Marker({
                map: map
          });  
          infowindow.close();
          marker[i].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[i].setPosition(place.geometry.location);
          marker[i].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[i]);
        });
    }

最后初始化方法:

 function initialize() {
      var mapOptions = {
        center: new google.maps.LatLng(40.4700, 50.0000),
        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);
      types = document.getElementById('type-selector');
      map.controls[google.maps.ControlPosition.TOP_LEFT].push(types);


      inputs = document.getElementsByClassName("controlsInput");
      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>
</head>

和 HTML:

<body>
    <table>
                <tr>
                    <td>
                        <div>
                            <div id="inputlar">
                            <input id="pac-input" class="controlsInput" type="text" placeholder="Marşrutunuzu haradan başlayırsınız" /> <br />
                            <input id="pac-input2" class="controlsInput" type="text" placeholder="Haraya gedirsiniz"> <br />
                            </div>  <br />
                            <input id="addInputField" type="button" value="Yolüstü dayanacaq əlavə et" class="styled-button-10"/>

                            <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>
                    </td>
                    <td>
                        <div id="map-canvas" style="width:540px;height:380px;"></div>
                    </td>
                </tr>
            </table>
</body>
</html>

最佳答案

问题是您在添加新元素后没有调用 setupAutocomplete()。你必须做这样的事情(可以使用 jQuery 改进):

$(document).ready(function(){
    var count = 2;
    $("#addInputField").click(function(){
        count++;
        console.log('add new input field');
        $("#inputlar").append("<input id='pac-input" + count + "' class='controlsInput' type='text' placeholder='Enter your destination' /> <br />");

        // added
        var newInput = [];
        var newEl = document.getElementById('pac-input' + count);
        newInput.push(newEl);
        setupAutocomplete(autocomplete, newInput, 0);

        if (count === 7) {
            $("#addInputField").remove();
        }
    });    
});

更新: example at jsbin . setupAutocomplete() 必须稍微更改一下，留下注释代码以查看差异，使用 idx 代替参数 i。

function setupAutocomplete(autocomplete, inputs, i) {

    // autocomplete[i] = new google.maps.places.Autocomplete(inputs[i], autocompleteOptions);
    autocomplete.push(new google.maps.places.Autocomplete(inputs[i], autocompleteOptions));
    var idx = autocomplete.length - 1;
    //autocomplete[i].bindTo('bounds', map);
    autocomplete[idx].bindTo('bounds', map);

    //google.maps.event.addListener(autocomplete[i], 'place_changed', function() {
    google.maps.event.addListener(autocomplete[idx], 'place_changed', function() {
    ...

注意:我没有检查当您达到 7 个自动完成输入时会发生什么。也许您需要进行一些更新。

关于javascript - Google Places Autocomplete 不适用于动态生成的输入元素，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21553673/

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