>问题：当您在主输入中搜索时，API 会返回所有城市(也返回没有postal_codes的较大城市(。我想制作一个搜索字段，主要通过返回postal_codes来提供预测。此外，谷歌放置API甚至是适合这项工作的API？这是我指定地区和国家/地区的谷歌演示代码
<!DOCTYPE html>
<html>
<head>
<title>Place Autocomplete Address Form</title>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<style>
/* 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;
}
</style>
<link type="text/css" rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500">
<style>
#locationField,
#controls {
position: relative;
width: 480px;
}
#autocomplete {
position: absolute;
top: 0px;
left: 0px;
width: 99%;
}
.label {
text-align: right;
font-weight: bold;
width: 100px;
color: #303030;
}
#address {
border: 1px solid #000090;
background-color: #f0f0ff;
width: 480px;
padding-right: 2px;
}
#address td {
font-size: 10pt;
}
.field {
width: 99%;
}
.slimField {
width: 80px;
}
.wideField {
width: 200px;
}
#locationField {
height: 20px;
margin-bottom: 2px;
}
</style>
</head>
<body>
<div id="locationField">
<input id="autocomplete" placeholder="Enter your address" onFocus="geolocate()" type="text"></input>
</div>
<table id="address">
<tr>
<td class="label">Street address</td>
<td class="slimField"><input class="field" id="street_number" disabled="true"></input></td>
<td class="wideField" colspan="2"><input class="field" id="route" disabled="true"></input></td>
</tr>
<tr>
<td class="label">City</td>
<!-- Note: Selection of address components in this example is typical.
You may need to adjust it for the locations relevant to your app. See
https://developers.google.com/maps/documentation/javascript/examples/places-autocomplete-addressform
-->
<td class="wideField" colspan="3"><input class="field" id="locality" disabled="true"></input></td>
</tr>
<tr>
<td class="label">State</td>
<td class="slimField"><input class="field" id="administrative_area_level_1" disabled="true"></input></td>
<td class="label">Zip code</td>
<td class="wideField"><input class="field" id="postal_code" disabled="true"></input></td>
</tr>
<tr>
<td class="label">Country</td>
<td class="wideField" colspan="3"><input class="field" id="country" disabled="true"></input></td>
</tr>
</table>
<script>
// This example displays an address form, using the autocomplete feature
// of the Google Places API to help users fill in the information.
// 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">
var placeSearch, autocomplete;
var componentForm = {
street_number: 'short_name',
route: 'long_name',
locality: 'long_name',
administrative_area_level_1: 'short_name',
country: 'long_name',
postal_code: 'short_name'
};
function initAutocomplete() {
// Create the autocomplete object, restricting the search to geographical
// location types.
autocomplete = new google.maps.places.Autocomplete(
/** @type {!HTMLInputElement} */(document.getElementById('autocomplete')),
{ types: ['(regions)'], componentRestrictions: { country: "dk" } });
// When the user selects an address from the dropdown, populate the address
// fields in the form.
autocomplete.addListener('place_changed', fillInAddress);
}
function fillInAddress() {
// Get the place details from the autocomplete object.
var place = autocomplete.getPlace();
for (var component in componentForm) {
document.getElementById(component).value = '';
document.getElementById(component).disabled = false;
}
// Get each component of the address from the place details
// and fill the corresponding field on the form.
for (var i = 0; i < place.address_components.length; i++) {
var addressType = place.address_components[i].types[0];
if (componentForm[addressType]) {
var val = place.address_components[i][componentForm[addressType]];
document.getElementById(addressType).value = val;
}
}
}
// Bias the autocomplete object to the user's geographical location,
// as supplied by the browser's 'navigator.geolocation' object.
function geolocate() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
var geolocation = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
var circle = new google.maps.Circle({
center: geolocation,
radius: position.coords.accuracy
});
autocomplete.setBounds(circle.getBounds());
});
}
}
</script>
<script
src="https://maps.googleapis.com/maps/api/js?key=MY_KEY&libraries=places&callback=initAutocomplete&components=regional:postal_code&sensor=false"
async defer></script>
</body>
</html>```
使用componentRestrictions(文档(或简单的bounds。 (regions)类型包括搜索postal_code。
var options = {
types: ['(regions)'],
componentRestrictions: {country: "us"} // 2-letters code
};
var autocomplete = new google.maps.places.Autocomplete(inputObject, options);
我们所做的是创建自己的组件，而不是使用Google提供的组件。然后，我们将我们已经知道的邮政编码，州和城市添加到搜索查询中(将其连接到末尾(，例如33139迈阿密，佛罗里达州，这样我们的预测/建议始终包含它，并将结果限制为包含此类信息的结果。