javascript – 如果在未选择自动填充选项时禁用输入：Google Maps SearchBox

使用具有自动完成功能的Google地图搜索框：

如果用户输入显示结果的名称,然后在选择实际结果之前按Enter键,那么’places_matched’事件仍将被触发,并且API为它们选择一个结果.

如何强制用户选择/突出显示一个自动完成结果,或者至少检测他们没有真正选择结果并阻止该请求的地方？

看到这里的jsfiddle：http://jsfiddle.net/4rs1mgno/2/

在文本输入中,输入任何内容,然后按Enter键.我输入“测试”,输出“BYU测试中心”.我不想发生任何事情,因为他们没有真正选择一个选项.

这是从小提琴的JS代码：

$(function(){      
 var input = document.getElementById('pac-input');
    var options = {
      keyword: 'establishment'
    }
    var searchBox = new google.maps.places.SearchBox(input,options);

    searchBox.addListener('places_changed',function(evt) {
      console.log('changed');

      var places = searchBox.getPlaces();

      if (places.length == 0) {
        return;
      }
      places.forEach(function(place) {
        $('#output').append(place['name']);
      });
    });
});

谢谢！

在这里有很多类似的问题,但没有一个匹配这个.

解决方法@H_404_20@

您可以使用 Autocomplete Service和 Places Service,并模仿SearchBox的行为.使用getPlacePredictions可以轻松控制搜索字段和搜索结果项目的行为.

这个例子已经有了一些CSS,使它看起来像“SearchBox”一样.当然可以适应和增强.代码被评论,所以它应该说自己.

var autocompleteService,placesService,results,map;

function initialize() {

  results = document.getElementById('results');

  var mapOptions = {
    zoom: 5,center: new google.maps.LatLng(50,50)
  };

  map = new google.maps.Map(document.getElementById('map-canvas'),mapOptions);

  // Bind listener for address search
  google.maps.event.addDomListener(document.getElementById('address'),'input',function() {

    results.style.display = 'block';
    getPlacePredictions(document.getElementById('address').value);
  });

  // Show results when address field is focused (if not empty)
  google.maps.event.addDomListener(document.getElementById('address'),'focus',function() {

    if (document.getElementById('address').value !== '') {

      results.style.display = 'block';
      getPlacePredictions(document.getElementById('address').value);
    }
  });

  // Hide results when click occurs out of the results and inputs
  google.maps.event.addDomListener(document,'click',function(e) {

    if ((e.target.parentElement.className !== 'pac-container') && (e.target.parentElement.className !== 'pac-item') && (e.target.tagName !== 'INPUT')) {

      results.style.display = 'none';
    }
  });

  autocompleteService = new google.maps.places.AutocompleteService();
  placesService = new google.maps.places.PlacesService(map);
}

// Get place predictions
function getPlacePredictions(search) {

  autocompleteService.getPlacePredictions({
    input: search,types: ['establishment','geocode']
  },callback);
}

// Get place details
function getPlaceDetails(placeId) {

  var request = {
    placeId: placeId
  };

  placesService.getDetails(request,function(place,status) {

    if (status === google.maps.places.PlacesServiceStatus.OK) {

      var center = place.geometry.location;
      var marker = new google.maps.Marker({
        position: center,map: map
      });

      map.setCenter(center);

      // Hide autocomplete results
      results.style.display = 'none';
    }
  });
}

// Place search callback
function callback(predictions,status) {

  // Empty results container
  results.innerHTML = '';

  // Place service status error
  if (status != google.maps.places.PlacesServiceStatus.OK) {
    results.innerHTML = '<div class="pac-item pac-item-error">Your search returned no result. Status: ' + status + '</div>';
    return;
  }

  // Build output for each prediction
  for (var i = 0,prediction; prediction = predictions[i]; i++) {

    // Insert output in results container
    results.innerHTML += '<div class="pac-item" data-placeid="' + prediction.place_id + '" data-name="' + prediction.terms[0].value + '"><span class="pac-icon pac-icon-marker"></span>' + prediction.description + '</div>';
  }

  var items = document.getElementsByClassName("pac-item");

  // Results items click
  for (var i = 0,item; item = items[i]; i++) {

    item.onclick = function() {

      getPlaceDetails(this.dataset.placeid);
    };
  }
}

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

body,html {
  font-family: Arial,sans-serif;
  padding: 0;
  margin: 0;
  height: 100%;
}

#map-canvas {
  height: 150px;
  width: 200px;
  margin-bottom: 10px;
}

.search {
  width: 200px;
  padding: 5px;
  float: left;
}

label {
  display: block;
  width: 160px;
  font-size: 11px;
  color: #777;
  margin-bottom: 5px;
}

input {
  border: 1px solid #ccc;
  width: 170px;
  padding: 3px 5px;
  Box-sizing: border-Box;
  -moz-Box-sizing: border-Box;
  -webkit-Box-sizing: border-Box;
  Box-shadow: 0 2px 6px rgba(0,.1);
}

.pac-container {
  background-color: #fff;
  z-index: 1000;
  border-radius: 2px;
  font-size: 11px;
  Box-shadow: 0 2px 6px rgba(0,.3);
  -moz-Box-sizing: border-Box;
  -webkit-Box-sizing: border-Box;
  Box-sizing: border-Box;
  overflow: hidden;
  width: 170px;
}

.pac-icon {
  width: 15px;
  height: 20px;
  margin-right: 7px;
  margin-top: 6px;
  display: inline-block;
  vertical-align: top;
  background-image: url(https://maps.gstatic.com/mapfiles/api-3/images/autocomplete-icons.png);
  background-size: 34px;
}

.pac-icon-marker {
  background-position: -1px -161px;
}

.pac-item {
  cursor: pointer;
  padding: 0 4px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  line-height: 30px;
  vertical-align: middle;
  text-align: left;
  border-top: 1px solid #e6e6e6;
  color: #999;
}

.pac-item:hover {
  background-color: #efefef;
}

.pac-item-error,.pac-item-error:hover {
  color: #aaa;
  padding: 0 5px;
  cursor: default;
  background-color: #fff;
}

<div class="search">
  <label for="address">Address:</label>
  <input id="address" placeholder="Enter address" type="text" tabindex="1" />
  <br />
  <div id="results" class="pac-container"></div>
</div>
<div id="map-canvas"></div>

<script src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>

javascript – 如果在未选择自动填充选项时禁用输入：Google Maps SearchBox

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