Google Maps API Javascript，从页面上的表单输入中获取经度纬度

Question

我正在尝试创建一个 1 页地图生成器，他们在其中输入地址和邮政编码。这部分有效Geolocation API 然后进行反向查找以获取经度和纬度，并将其填充到 2 个隐藏的输入字段以供以后使用。这部分不起作用然后，我需要使用 Maps API 从隐藏的输入中获取经度和纬度值并生成地图，但是，变量为 NULL，因为它们设置在单击时激活的函数中。我需要能够在设置值后触发地图生成器代码，或者最初从一组数字传递一组值，然后单击按钮使用隐藏值重新运行代码。<script>var apiKey='REMOVED FOR PRIVACY';var longitude, latitude, map;jQuery(document).ready(function( $ ) {    $('#find-address').click(function () {        var address = $('#address').val();        var postcode = $('#postcode').val();        var addressClean = address.replace(/\s+/g, '+');        var postcodeClean = postcode.replace(/\s+/g, '+');        var apiCall = 'https://maps.googleapis.com/maps/api/geocode/json?address='+addressClean+',+'+postcodeClean+'&key='+apiKey+'';        $.getJSON(apiCall,function (data, textStatus) {            longitude = data.results[0].geometry.location.lng;            latitude = data.results[0].geometry.location.lat;            document.getElementById("long").value = longitude;            document.getElementById("lat").value = latitude;        });        setTimeout(function(){            longitude = $("input#long").val();            latitude = $("input#lat").val();            if(longitude && latitude){                longitude = parseFloat(longitude);                latitude = parseFloat(latitude);                initMap(longitude,latitude);            }        }, 1000);    });});function initMap(longitude,latitude) {    var myLatlng = new google.maps.LatLng(latitude,longitude);    var mapOptions = {      zoom: 12,      center: myLatlng    }    var map = new google.maps.Map(document.getElementById("map-embed-div"), mapOptions);    var marker = new google.maps.Marker({        position: myLatlng,        map: map,        draggable: true,        title: "Where's your garden?"    });};</script><script src="https://maps.googleapis.com/maps/api/js?key=REMOVED_FOR_PRIVACY&callback=initMap" async defer></script>我尝试在 setTimeout 函数中调用该函数并在函数回调中传递值，但这会返回 NULL。在 timeout 函数中移动所有内容会引发未定义 initMap 的 promise 错误。

Answer 1

有几个问题。

1. 我收到 JavaScript 错误：InvalidValueError: setCenter: not a LatLng or LatLngLiteral with finite coordinates: in property lat: NaN is not an accepted value因为在您的 API 中包括：

你有callback=initMap，但你不希望它在 API 加载时运行，你希望它在用户单击“查找地址”后运行。删除：

<script src="https://maps.googleapis.com/maps/api/js?key=REMOVED_FOR_PRIVACY" async defer></script>

1. 我收到 JavaScript 错误：Uncaught TypeError: Cannot read property 'geometry' of undefined当我单击“查找地址”时，因为没有错误检查。如果我检查文本状态（至少使用 Google 测试键），它会告诉我："API keys with referer restrictions cannot be used with this API.", status: "REQUEST_DENIED". 如果我对地理编码器的请求使用不受限制的密钥，我会得到一个带有标记的地图（至少对于有效地址）。我建议使用 Google JavaScript API v3 Geocoder，并添加错误检查：

var geocoder = new google.maps.Geocoder();

geocoder.geocode({

  address: addressClean + "," + postcodeClean

}, function(results, status) {

  console.log(status);

  if (status == 'OK') {

    console.log(results);

    longitude = results[0].geometry.location.lng();

    latitude = results[0].geometry.location.lat();

    document.getElementById("long").value = longitude;

    document.getElementById("lat").value = latitude;

    // geocoder is asynchronous, do this in the callback function

    longitude = $("input#long").val();

    latitude = $("input#lat").val();

    if (longitude && latitude) {

      longitude = parseFloat(longitude);

      latitude = parseFloat(latitude);

      initMap(longitude, latitude);

    }

  } else alert("geocode failed")

});

代码片段：

var apiKey = 'AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk';

var longitude, latitude, map;

jQuery(document).ready(function($) {

  $('#find-address').click(function() {

    var address = $('#address').val();

    var postcode = $('#postcode').val();

    var addressClean = address.replace(/\s+/g, '+');

    var postcodeClean = postcode.replace(/\s+/g, '+');

    var apiCall = 'https://maps.googleapis.com/maps/api/geocode/json?address=' + addressClean + ',+' + postcodeClean + '&key=' + apiKey + '';

    //$.getJSON(apiCall,function (data, textStatus) {

    var geocoder = new google.maps.Geocoder();

    geocoder.geocode({

      address: addressClean + "," + postcodeClean

    }, function(results, status) {

      console.log(status);

      if (status == 'OK') {

        console.log(results);

        longitude = results[0].geometry.location.lng();

        latitude = results[0].geometry.location.lat();

        document.getElementById("long").value = longitude;

        document.getElementById("lat").value = latitude;

        // geocoder is asynchronous, do this in the callback function

        longitude = $("input#long").val();

        latitude = $("input#lat").val();

        if (longitude && latitude) {

          longitude = parseFloat(longitude);

          latitude = parseFloat(latitude);

          initMap(longitude, latitude);

        }

      } else alert("geocode failed")

    });

  });

  function initMap(longitude, latitude) {

    var myLatlng = new google.maps.LatLng(latitude, longitude);

    var mapOptions = {

      zoom: 12,

      center: myLatlng

    }

    var map = new google.maps.Map(document.getElementById("map-embed-div"), mapOptions);

    var marker = new google.maps.Marker({

      position: myLatlng,

      map: map,

      draggable: true,

      title: "Where's your garden?"

    });

  };

})

/* 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;

}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<form action="/instant-quote-test/#wpcf7-f3686-p3924-o1" method="post" class="wpcf7-form mailchimp-ext-0.5.14" novalidate="novalidate">

  <div style="display: none;">

    <input type="hidden" name="_wpcf7" value="3686" /><br />

    <input type="hidden" name="_wpcf7_version" value="5.1.7" /><br />

    <input type="hidden" name="_wpcf7_locale" value="en_GB" /><br />

    <input type="hidden" name="_wpcf7_unit_tag" value="wpcf7-f3686-p3924-o1" /><br />

    <input type="hidden" name="_wpcf7_container_post" value="3924" />

  </div>

  <p><span class="wpcf7-form-control-wrap your-fname"><input type="hidden" name="your-fname" value="" size="40" class="wpcf7-form-control wpcf7dtx-dynamictext wpcf7-dynamichidden" aria-invalid="false" /></span><span class="wpcf7-form-control-wrap your-email"><input type="hidden" name="your-email" value="" size="40" class="wpcf7-form-control wpcf7dtx-dynamictext wpcf7-dynamichidden" aria-invalid="false" /></span>

    <span

      class="wpcf7-form-control-wrap your-phone"><input type="hidden" name="your-phone" value="" size="40" class="wpcf7-form-control wpcf7dtx-dynamictext wpcf7-dynamichidden" aria-invalid="false" /></span>

  </p>

  <input type="text" name="street-address" value="77 Mass Ave" size="40" class="wpcf7-form-control wpcf7-text wpcf7-validates-as-required" id="address" aria-required="true" aria-invalid="false" placeholder="Street Address" />

  <input type="text" name="post-code" value="02139" size="40" class="wpcf7-form-control wpcf7-text wpcf7-validates-as-required" id="postcode" aria-required="true" aria-invalid="false" placeholder="Post Code" />

  <input type="hidden" id="lat" value=""><input type="hidden" id="long" value="">

  <input type="hidden" name="addressField1" value=""><input type="hidden" name="postcodeField">

  <a href="#" id="find-address" title="Find Address" class="button">Find Address</a>

  <div id="map-embed">

    <div id="map-embed-div" style="height:400px;width:100%;"></div>

  </div>

  <div id="after-map-quote">

    <input type="submit" value="Get My Lawn Care Quote" class="wpcf7-form-control wpcf7-submit quote-send" />

  </div>

</form>

<!-- Replace the value of the key parameter with your own API key. -->

<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk" async defer></script>