Question

如何使自动填充显示仅显示特定国家/地区或邮政编码的结果？

这是我到目前为止所做的事情

var input = document.getElementById('searchTextField');
        var autocomplete = new google.maps.places.Autocomplete(input);

        autocomplete.bindTo('bounds', map);

Answer 1

您有多种类型的过滤器：

Viewport Biasing
Region Biasing

如果您更喜欢视口偏移，则应指定一个位置（您想要检索其位置信息的纬度/经度）和一个半径（返回Place结果的距离（以米为单位））。如果您更喜欢区域偏差，则必须提供区域（国家/地区代码，请参阅http://en.wikipedia.org/wiki/CcTLD）。

使用区域偏差的示例： maps.googleapis.com/maps/api/place/autocomplete/json?input=Vict&types=geocode&region=CA&language=fr&sensor=true&key=AIzaSyAiFpFd85eMtfbvmVNEYuNds5TEF9FjIPI

您可以在官方google maps api文档中阅读更多内容：http://code.google.com/apis/maps/documentation/places/autocomplete.html

Answer 2

您可以截取JSONP功能返回的google.maps.places.Autocomplete结果，并根据需要使用它们。

基本上，您在head元素上重新定义了appendChild方法，然后监视Google自动完成代码插入到JSONP的DOM中的javascript元素。随着javascript元素的添加，您可以覆盖Google定义的JSONP回调，以便访问原始自动填充数据，然后您可以按国家/地区进行限制并显示。

这是一个黑客，这里（我使用jQuery，但这不是必要的工作）：

//The head element, where the Google Autocomplete code will insert a tag 
//for a javascript file.
var head = $('head')[0];  
//The name of the method the Autocomplete code uses to insert the tag.
var method = 'appendChild';  
//The method we will be overriding.
var originalMethod = head[method];

head[method] = function () {
  if (arguments[0] && arguments[0].src && arguments[0].src.match(/GetPredictions/)) {  //Check that the element is a javascript tag being inserted by Google.
    var callbackMatchObject = (/callback=([^&]+)&|$/).exec(arguments[0].src);  //Regex to extract the name of the callback method that the JSONP will call.
    var searchTermMatchObject = (/\?1s([^&]+)&/).exec(arguments[0].src);  //Regex to extract the search term that was entered by the user.
    var searchTerm = unescape(searchTermMatchObject[1]);
    if (callbackMatchObject && searchTermMatchObject) {
      var names = callbackMatchObject[1].split('.');  //The JSONP callback method is in the form "abc.def" and each time has a different random name.
      var originalCallback = names[0] && names[1] && window[names[0]] && window[names[0]][names[1]];  //Store the original callback method.
      if (originalCallback) {
        var newCallback = function () {  //Define your own JSONP callback
          if (arguments[0] && arguments[0][3]) {
            var data = arguments[0][4];  //Your autocomplete results
            //SUCCESS! - Limit results here and do something with them, such as displaying them in an autocomplete dropdown.
          }
        }

        //Add copy all the attributes of the old callback function to the new callback function. This prevents the autocomplete functionality from throwing an error.
        for (name in originalCallback) {  
          newCallback[name] = originalCallback[name];
        }
        window[names[0]][names[1]] = newCallback;  //Override the JSONP callback
      }
    }

  //Insert the element into the dom, regardless of whether it was being inserted by Google.
  return originalMethod.apply(this, arguments);
};

自动填充仅显示来自特定国家/地区或邮政编码的结果

2 个答案: