javascript - GoogleMaps v3 autocomplete.getBounds() 设置后返回 undefined

Question

我在尝试将 Google map 自动完成的结果偏向放置在 map 上的最后一个图钉时遇到问题。我在这里关注谷歌的教程: https://developers.google.com/maps/documentation/javascript/places-autocomplete#change_search_area

我的 CoffeeScript 代码如下:

initSearch = ->
  autocomplete = new (google.maps.places.Autocomplete)(document.getElementById('location-query'), types: [ 'geocode' ])
  autocomplete.addListener 'place_changed', ->
    place = autocomplete.getPlace()
    addDestination(place, map, insertIndex) #places pin on map

    console.log 'autocomplete bounds (before): ' + autocomplete.getBounds()
    #setting bounds around new place
    biasCircle = new google.maps.Circle
      center: place.geometry.location
      radius: 500 #in kilometers

    autocomplete.setBounds(biasCircle.getBounds())
    console.log 'autocomplete bounds (after): ' + autocomplete.getBounds()

编译成以下 javascript:

initSearch = function() {
    var autocomplete;
    autocomplete = new google.maps.places.Autocomplete(document.getElementById('location-query'), {
      types: ['geocode']
    });
    return autocomplete.addListener('place_changed', function() {
      var biasCircle;
      place = autocomplete.getPlace();
      addDestination(place, map, insertIndex);

      console.log('autocomplete bounds (before): ' + autocomplete.getBounds());
      biasCircle = new google.maps.Circle({
        center: place.geometry.location,
        radius: 500
      });
      autocomplete.setBounds(biasCircle.getBounds());
      return console.log('autocomplete bounds (after): ' + autocomplete.getBounds());
    });
  };

图钉正确放置在 map 上，但无论我添加多少个地方，console.logs 总是返回:

autocomplete bounds (before): undefined
autocomplete bounds (after): ((9.923577823579402, -84.09528446042509), (9.932560976420598, -84.08616473957488))

边界设置正确(如第二个 console.log 所示)，但结果实际上并没有偏差，第一个总是导致未定义。

我们用来测试结果是否有偏差的测试用例是: 1. 在自动完成中输入“San Jose”(最佳结果应该在美国) 2. 在 map 上添加“Limon, Costa Rica”作为标记 3. 在自动完成中输入“San Jose”，最上面的结果应该是 San Jose, COSTA RICA

我们认为这可能是范围问题，所以我们在所有地方都尝试了 window.autocomplete，但仍然遇到同样的问题。我们还尝试在单独的方法中设置自动完成范围(而不是 place_changed 事件，但这也没有用)。

预先感谢您的帮助!

更新:尝试 Cedric 的回答根据 Cedric 的建议，我试图在监听器回调之外设置边界(从监听器内部调用方法)，但我仍然遇到同样的问题。新代码:

#Sets autocomplete bias
setAutocompleteBias = (place) ->
  console.log 'autocomplete bounds (before): ' + window.autocomplete.getBounds()
  #setting bounds around new place
  biasCircle = new google.maps.Circle
    center: place.geometry.location
    radius: 500 #in kilometers

  window.autocomplete.setBounds(biasCircle.getBounds())
  console.log 'autocomplete bounds (after): ' + window.autocomplete.getBounds()

window.autocomplete = null
#Autocomplete search box initialization
initSearch = ->
  window.autocomplete = new (google.maps.places.Autocomplete)(document.getElementById('location-query'), types: [ 'geocode' ])
  #autocomplete.bindTo('bounds', map)
  window.autocomplete.addListener 'place_changed', ->
    place = window.autocomplete.getPlace()

    addDestination(place, map, insertIndex)

    setAutocompleteBias(place)

Answer 1

看来您的自动完成功能缺少必要的 map 边界初始化

initSearch = ->
  autocomplete = new (google.maps.places.Autocomplete(                  
    document.getElementById('location-query'), types: [ 'geocode' ])
  autocomplete.bindTo('bounds', map)
  autocomplete.addListener 'place_changed', ->
    place = autocomplete.getPlace()
    addDestination(place, map, insertIndex) #places pin on map

    console.log 'autocomplete bounds (before): ' + autocomplete.getBounds()
    #setting bounds around new place
    biasCircle = new google.maps.Circle
      center: place.geometry.location
      radius: 500 #in kilometers
    autocomplete.setBounds(biasCircle.getBounds())
    console.log 'autocomplete bounds (after): ' + autocomplete.getBounds()

或通过特定位置

var defaultBounds = new google.maps.LatLngBounds(
  new google.maps.LatLng(-33.8902, 151.1759),
  new google.maps.LatLng(-33.8474, 151.2631));

var input = document.getElementById('searchTextField');
var options = {
  bounds: defaultBounds,
  types: ['establishment']
};
autocomplete = new google.maps.places.Autocomplete(input, options);

教程中的链接 https://developers.google.com/maps/documentation/javascript/places-autocomplete#add_autocomplete

来自文档的链接 https://developers.google.com/maps/documentation/javascript/examples/places-autocomplete