使用AngularJS的地理编码服务

Question

我是新手，想了解如何在AngularJS中实现地理编码服务。具体来说，当我填写完整地址后，如何自动填充其他字段（邮政编码、城市、国家、纬度和经度）？我想实现类似这个页面在Angular中的效果。请帮帮我。

我已经有代码可以填充完整地址：

app.directive('googlePlaces', function(){
    return {
        restrict:'E',
        replace:true,
        // transclude:true,
        scope: {location:'='},
        template: '<input type="text" id="fulladdress" name="fulladdress" ng-model="enterprise.fulladdress" class="form-control text-field" placeholder="">',
        link: function($scope, elm, attrs){
            var autocomplete = new google.maps.places.Autocomplete($("#country")[0], {});
            google.maps.event.addListener(autocomplete, 'place_changed', function() {
                var place = autocomplete.getPlace();
                $scope.location = place.geometry.location.lat() + ',' + place.geometry.location.lng();
                $scope.$apply();
            });
        }
    }
});

并且HTML：

<div class="form-group enterprise-form">
     <label>Full Address</label>
     <google-places location=location></google-places>
</div>

我想要填充两个或三个更多的字段 纬度、经度、邮政编码。我能够扩展我的指令来实现这一点吗？如果可以，应该如何操作？

- Deepak saini

---

如果你遇到了困难，可以先尝试一些方法，看看能走多远，然后再回来提出具体问题。 - paulpdaniels

你不能要求别人为你（从头开始）编写代码，因为这不是一个问题，所以你不会收到任何答案。 - michelem

好的，谢谢。我刚刚添加了我的代码，通过它我只能得到地址。但是我想在地址的基础上获得更多的信息。 - Deepak saini

Answer 1

您可以按照示例进行操作。

自动完成监听器'place_change'发生在angular的$digest循环之外，因此您应该使用$evalAsync调用fillInAddress，否则您的表单将在下一个循环中更改。

纬度和经度存储在place对象的geometry.location中。

var app = angular.module('app', []);

app.controller('myController', function($scope) {
  var components = {
    street_number: 'short_name',
    route: 'long_name',
    locality: 'long_name',
    administrative_area_level_1: 'short_name',
    country: 'long_name',
    postal_code: 'short_name'
  };
  var autocomplete = new google.maps.places.Autocomplete(document.getElementById('autocomplete'), {
    types: ['geocode']
  });
  google.maps.event.addListener(autocomplete, 'place_changed', function() {
    $scope.$evalAsync(fillInAddress);
  });
  
  $scope.formData = {};
  $scope.ll = {};

  function fillInAddress() {
    var place = autocomplete.getPlace();
    Object.keys(components).forEach(function(component) {
      $scope.formData[component] = '';
      document.getElementById(component).disabled = false;
    });
    
    place.address_components.forEach(function(component) {
      var addressType = component.types[0];
      if (components[addressType]) {
        $scope.formData[addressType] = component[components[addressType]];
      }
    });
    $scope.ll = {
      lat: place.geometry.location.G,
      lon: place.geometry.location.K
    };
  }
});

#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;
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true&libraries=places"></script>

<div ng-app='app' ng-controller='myController'>
  <div id="locationField">
    <input id="autocomplete" placeholder="Enter your address" type="text">
  </div>
  <table id="address">
    <tr>
      <td class="label">Street address</td>
      <td class="slimField">
        <input ng-model="formData.street_number" class="field" id="street_number" disabled="true" type="text">
      </td>
      <td class="wideField" colspan="2">
        <input ng-model="formData.route" class="field" id="route" disabled="true">
      </td>
    </tr>
    <tr>
      <td class="label">City</td>
      <td class="wideField" colspan="3">
        <input ng-model="formData.locality" class="field" id="locality" disabled="true">
      </td>
    </tr>
    <tr>
      <td class="label">State</td>
      <td class="slimField">
        <input ng-model="formData.administrative_area_level_1" class="field" id="administrative_area_level_1" disabled="true">
      </td>
      <td class="label">Zip code</td>
      <td class="wideField">
        <input ng-model="formData.postal_code" class="field" id="postal_code" disabled="true">
      </td>
    </tr>
    <tr>
      <td class="label">Country</td>
      <td class="wideField" colspan="3">
        <input ng-model="formData.country" class="field" id="country" disabled="true">
      </td>
    </tr>
  </table>
  <pre>{{ formData | json }}</pre>
  <pre>{{ ll | json }}</pre>
</div>

- dting

---

@Dting 我怎么将 ng-model="formData.locality" 更改为 "formData.city"？ - Usman Iqbal