我想实现一个位置下拉菜单，如Airbnb.com和Postmates.com上所示。
我希望用户能够在世界任何地方键入一个位置，并仅显示该位置的结果。
我认为位置下拉菜单与Google地图有关，但我似乎无法弄清楚。
答案 0 :(得分：1)
我相信您想要实现的是自动完成功能，该功能可以通过Google Maps Places API - Place Autocomplete使用。
请在摘要中查看示例：
// This example requires the Places library. Include the libraries=places
// parameter when you first load the API. For example:
// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places">
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -33.8688, lng: 151.2195},
zoom: 13
});
var card = document.getElementById('pac-card');
var input = document.getElementById('pac-input');
var types = document.getElementById('type-selector');
var strictBounds = document.getElementById('strict-bounds-selector');
map.controls[google.maps.ControlPosition.TOP_RIGHT].push(card);
var autocomplete = new google.maps.places.Autocomplete(input);
// Bind the map's bounds (viewport) property to the autocomplete object,
// so that the autocomplete requests use the current map bounds for the
// bounds option in the request.
autocomplete.bindTo('bounds', map);
// Set the data fields to return when the user selects a place.
autocomplete.setFields(
['address_components', 'geometry', 'icon', 'name']);
var infowindow = new google.maps.InfoWindow();
var infowindowContent = document.getElementById('infowindow-content');
infowindow.setContent(infowindowContent);
var marker = new google.maps.Marker({
map: map,
anchorPoint: new google.maps.Point(0, -29)
});
autocomplete.addListener('place_changed', function() {
infowindow.close();
marker.setVisible(false);
var place = autocomplete.getPlace();
if (!place.geometry) {
// User entered the name of a Place that was not suggested and
// pressed the Enter key, or the Place Details request failed.
window.alert("No details available for input: '" + place.name + "'");
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.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(' ');
}
infowindowContent.children['place-icon'].src = place.icon;
infowindowContent.children['place-name'].textContent = place.name;
infowindowContent.children['place-address'].textContent = 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);
radioButton.addEventListener('click', function() {
autocomplete.setTypes(types);
});
}
setupClickListener('changetype-all', []);
setupClickListener('changetype-address', ['address']);
setupClickListener('changetype-establishment', ['establishment']);
setupClickListener('changetype-geocode', ['geocode']);
document.getElementById('use-strict-bounds')
.addEventListener('click', function() {
console.log('Checkbox clicked! New state=' + this.checked);
autocomplete.setOptions({strictBounds: this.checked});
});
}/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#description {
font-family: Roboto;
font-size: 15px;
font-weight: 300;
}
#infowindow-content .title {
font-weight: bold;
}
#infowindow-content {
display: none;
}
#map #infowindow-content {
display: inline;
}
.pac-card {
margin: 10px 10px 0 0;
border-radius: 2px 0 0 2px;
box-sizing: border-box;
-moz-box-sizing: border-box;
outline: none;
box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
background-color: #fff;
font-family: Roboto;
}
#pac-container {
padding-bottom: 12px;
margin-right: 12px;
}
.pac-controls {
display: inline-block;
padding: 5px 11px;
}
.pac-controls label {
font-family: Roboto;
font-size: 13px;
font-weight: 300;
}
#pac-input {
background-color: #fff;
font-family: Roboto;
font-size: 15px;
font-weight: 300;
margin-left: 12px;
padding: 0 11px 0 13px;
text-overflow: ellipsis;
width: 400px;
}
#pac-input:focus {
border-color: #4d90fe;
}
#title {
color: #fff;
background-color: #4d90fe;
font-size: 25px;
font-weight: 500;
padding: 6px 12px;
}<div class="pac-card" id="pac-card">
<div>
<div id="title">
Autocomplete search
</div>
<div id="type-selector" class="pac-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-address">
<label for="changetype-address">Addresses</label>
<input type="radio" name="type" id="changetype-geocode">
<label for="changetype-geocode">Geocodes</label>
</div>
<div id="strict-bounds-selector" class="pac-controls">
<input type="checkbox" id="use-strict-bounds" value="">
<label for="use-strict-bounds">Strict Bounds</label>
</div>
</div>
<div id="pac-container">
<input id="pac-input" type="text"
placeholder="Enter a location">
</div>
</div>
<div id="map"></div>
<div id="infowindow-content">
<img src="" width="16" height="16" id="place-icon">
<span id="place-name" class="title"></span><br>
<span id="place-address"></span>
</div>
<!-- Replace the value of the key parameter with your own API key. -->
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyAj0aaMu_aY6xiDSWH0ac_4pqN_l-opwmI&libraries=places&callback=initMap"
async defer></script>
“地方自动完成”还有其他用例可以帮助您：
Place Autocomplete Address Form
Place Autocomplete Hotel Search
Place Autocomplete Restricted to Multiple Countries
如果您要构建自己的用户界面，则可以通过Place Autocomplete Service
以编程方式获取“放置自动完成”结果希望这会有所帮助。