带有 Google Maps autocompleteService 的 Angular 指令 md-autocomplete

Question

提前感谢您的帮助。

我一直在尝试设置一个自动完成搜索框，以便使用 Angular 与 google AutocompleteService API 进行交互。

目前，我的 Angular AutocompleteService 运行良好，并根据在搜索栏中输入的内容检索一系列建议的预测。

这是我的自动完成服务：

  angular
    .module('LocalKnowledgeApp')
    .service('AutocompleteService', [ function() {

var self = this;
var suggestions = [];



  self.initPredict = function(searchInput) {
    var predict = new google.maps.places.AutocompleteService();
    predict.getQueryPredictions({ input: searchInput }, self.displaySuggestions);
  };

  self.displaySuggestions = function(predictions, status) {
    if (status != google.maps.places.PlacesServiceStatus.OK) {
      console.log(status);
      return;
    }
    predictions.forEach(function(prediction) {
      suggestions.push(prediction.description);
    });
  };

  self.makeSuggestions = function(){
    return suggestions.slice(0,10);
  };

该服务被注入到控制器中，该控制器控制我尝试连接到自动完成的表单。 （我只包含了涉及到自动完成位并与 AutocompleteService 交互的函数）

angular
    .module('LocalKnowledgeApp')
    .controller('RequestController', ['LocationService', 'MarkersService', 'AutocompleteService', '$http', '$scope',
        function(LocationService, MarkersService, AutocompleteService, $http, $scope) {

    var self = this;
    var isInfoOpen = false;
    var clickedRequest = {};
    var requestUser = {};
    var autocompleteStarted;
    self.master = {};
    var autocompleteSuggestions = [];

    // var search = autoCompleteSearch;


    self.autoCompleteSearch = function(searchInput){
        if (searchInput.length < 2) {
        self.autocompleteStarted = false;
      } else {
        AutocompleteService.initPredict(searchInput);
        self.autocompleteStarted = true;
        self.autocompleteSuggestions = AutocompleteService.makeSuggestions();
        return self.autocompleteSuggestions;
      }
    };

我现在正在尝试连接以在搜索栏上获得一个下拉框，以便用户可以从 Google 自动完成服务返回到 RequestsController 的建议数组中进行选择。

<div id="myModal" class="modal fade" role="dialog">
  <div class="modal-dialog">
    <!-- Modal content-->
    <div class="modal-content" >
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal">&times;</button>
        <h4 class="modal-title">Request a tour from a local</h4>
      </div>
      <div class="modal-body">
        <form>
          <div class="form-group">
            <label for="location">Location</label>
            <div>
            <md-autocomplete
                md-search-text-change="r.autoCompleteSearch(searchText)"
                md-input-name="request.location"
                md-selected-item="selectedItem"
                md-search-text="searchText"
                md-items="item in r.autocompleteSearch(searchText)"
                md-item-text="item.display"
                md-input-minlength="0">
              <md-item-template md-highlight-text="searchText">
                {{item.display}}
              </md-item-template>
            </div>
            </md-autocomplete>

            <aside ng-show="r.autocompleteStarted" id="autocompleteSuggestions">
              <ul ng-repeat="suggestion in r.autocompleteSuggestions track by $index"> {{suggestion}} </ul>
            <aside>
          </div>

我已经注入了 ngMaterial 模块，并且在正确的位置拥有了所有需要的 bower 组件——我知道这一点是因为指令响应输入，但它只显示一个灰色框。

(function() {
  'use strict';

  angular
    .module('LocalKnowledgeApp', ['ngResource', 'ngMaterial']);

}());

这就是我的网页的样子...

[

非常感谢任何帮助！

Answer 1

角度指令：

'use strict';

angular.module('locationApp', ['ngAnimate', 'ngMaterial']);
angular.module('locationApp')
.controller('HomeCtrl', function ($scope) {
    // $scope.location={};

});
/**
 * @ngdoc directive
 * @name locationApp.directive:placeAutocomplete
 * @description
 *
 * # An element directive that provides a dropdown of
 * location suggestions based on the search string.
 * When an item is selected, the location's latitude
 * and longitude are determined.
 * 
 * This directive depends on the Google Maps API
 * with the places library
 * 
 * <script src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>
 * 
 * Usage:
 * <place-autocomplete ng-model="selectedLocation"></place-autocomplete>
 *
 * Credit:
 * http://stackoverflow.com/a/31510437/293847
 */
angular.module('locationApp')
  .directive('placeAutocomplete', function () {
      return {
          templateUrl: 'place-autocomplete.html',
          restrict: 'AEC',
          replace: true,
          scope: {
              'ngModel': '='
          },
          controller: function ($scope, $q) {
              if (!google || !google.maps) {
                  throw new Error('Google Maps JS library is not loaded!');
              } else if (!google.maps.places) {
                  throw new Error('Google Maps JS library does not have the Places module');
              }
              console.log('google.maps.places ', google.maps.places);
              var autocompleteService = new google.maps.places.AutocompleteService();
              var map = new google.maps.Map(document.createElement('div'));
              var placeService = new google.maps.places.PlacesService(map);
              console.log('google.maps.places ', placeService);
              $scope.ngModel = {};

              /**
               * @ngdoc function
               * @name getResults
               * @description
               *
               * Helper function that accepts an input string
               * and fetches the relevant location suggestions
               *
               * This wraps the Google Places Autocomplete Api
               * in a promise.
               *
               * Refer: https://developers.google.com/maps/documentation/javascript/places-autocomplete#place_autocomplete_service
               */
              var getResults = function (address) {
                  var deferred = $q.defer();
                  console.log('address ', address, autocompleteService)
                  autocompleteService.getQueryPredictions({
                      input: address,
                      component: {
                          country: 'IN'
                      }
                  }, function (data) {
                      deferred.resolve(data);
                  });
                  return deferred.promise;
              };

              /**
               * @ngdoc function
               * @name getDetails
               * @description
               * Helper function that accepts a place and fetches
               * more information about the place. This is necessary
               * to determine the latitude and longitude of the place.
               *
               * This wraps the Google Places Details Api in a promise.
               *
               * Refer: https://developers.google.com/maps/documentation/javascript/places#place_details_requests
               */
              var getDetails = function (place) {
                  var deferred = $q.defer();
                  placeService.getDetails({
                      'placeId': place.place_id
                  }, function (details) {
                      deferred.resolve(details);
                  });
                  return deferred.promise;
              };

              $scope.search = function (input) {
                  if (!input) {
                      return;
                  }
                  return getResults(input).then(function (places) {
                      return places;
                  });
              };
              /**
               * @ngdoc function
               * @name getLatLng
               * @description
               * Updates the scope ngModel variable with details of the selected place.
               * The latitude, longitude and name of the place are made available.
               *
               * This function is called every time a location is selected from among
               * the suggestions.
               */
                $scope.getLatLng = function (place) {
                if (!place) {
                    $scope.ngModel = {};
                    return;
                }
                getDetails(place).then(function (details) {
                    $scope.ngModel = {
                        'name': place.description,
                        'latitude': details.geometry.location.lat(),
                        'longitude': details.geometry.location.lng(),
                    };
                });
            }
        }
    };
});

HTML 部分：

<!DOCTYPE html>
<html ng-app="locationApp">
    <head>
        <!-- <link rel="stylesheet" href="place-autocomplete.css" /> -->
        <link rel="stylesheet" href="//rawgit.com/angular/bower-material/master/angular-material.css" />

        <script data-require="angular.js@1.4.8" data-semver="1.4.8" src="https://code.angularjs.org/1.4.8/angular.js"></script>
        <!-- <script data-require="angular-route.js@1.4.8" data-semver="1.4.8" src="https://code.angularjs.org/1.4.8/angular-route.js"></script> -->
        <script data-require="angular-aria@1.4.0" data-semver="1.4.0" src="https://code.angularjs.org/1.4.0/angular-aria.js"></script>
        <script data-require="angular-animate@1.4.8" data-semver="1.4.8" src="https://code.angularjs.org/1.4.8/angular-animate.js"></script>
        <script src="//rawgit.com/angular/bower-material/master/angular-material.js"></script>
        <script src="https://maps.googleapis.com/maps/api/js?libraries=places"></script>
        <script src="place-autocomplete.js"></script>
    </head>

    <body>
        <md-content>
            <md-toolbar>
                <div class="md-toolbar-tools">
                    <h2>
                        <span>Google places/location suggestions with md-autocomplete</span>
                    </h2>
                    <span flex></span>
                </div>
            </md-toolbar>
        </md-content>
        <md-content layout-padding>
            <p>Start typing the name of a place/location below</p>
            <div class="md-padding">
                <place-autocomplete ng-model="location"></place-autocomplete>
                <place-autocomplete ng-model="location1"></place-autocomplete>
                <place-autocomplete ng-model="location2"></place-autocomplete>
                <place-autocomplete ng-model="location3"></place-autocomplete>
                {{location}}
                {{location1}}
                {{location2}}
                {{location3}}
                <script type="text/ng-template" id="place-autocomplete.html">
                    <div>
                        <md-autocomplete md-no-cache="false" md-selected-item="location" md-selected-item-change="getLatLng(item)" ng-model-options="{debounce: 600}" md-search-text-change="search(searchText)" md-search-text="searchText" md-items="item in search(searchText)" md-item-text="item.description" md-min-length="2" md-max-length="50" md-floating-label="Location (place, city or region)">
                            <md-item-template>
                                <span md-highlight-text="searchText" md-highlight-flags="^i">{{item.description}}</span>
                            </md-item-template>
                            <md-not-found>
                                No matches found for "{{searchText.description}}".
                            </md-not-found>
                        </md-autocomplete>
                    </div>
                </script>
                <div ng-if="location.name">
                    <h4>Selected location</h4>
                    <pre>{{location}}</pre>
                </div>
            </div>
        </md-content>
    </body>
</html>

更多详情：

https://gist.github.com/vinaygopinath/49df0b58a276281e5ffa