JS，将参数传递给回调函数（Bing映射）

Question

从Bing Maps V8开始使用此示例

此行开始地图搜索：geocodeQuery("New York, NY");

此代码片段包含回调函数（将图钉放置在地图上：]

var searchRequest = {
  where: query,
  callback: function (r) {
    //Add the first result to the map and zoom into it.
    if (r && r.results && r.results.length > 0) {
      var pin = new Microsoft.Maps.Pushpin(r.results[0].location);
      map.entities.push(pin);
      map.setView({ bounds: r.results[0].bestView });
    }
  },
  errorCallback: function (e) {
    //If there is an error, alert the user about it.
    alert("No results found.");
  }
};

如果我想执行多个搜索，我可以写：

geocodeQuery("New York, NY");
geocodeQuery("Queens, NY");

现在我在地图上有2个图钉。

下一步：如果我想标记引脚，则将扩展“新图钉代码”：

var pin = new Microsoft.Maps.Pushpin(r.results[0].location,
{
    title: 'Queens',
    text: '2'
});

问题：

引脚由回调函数放置。由于我希望每个针脚都有不同的文本，因此如何调整此示例代码，以便可以将新参数传递给回调函数？

Answer 1

您需要在geocodeQuery函数中添加一个参数（可能称为title），并在回调中创建引脚时使用该参数。然后，您只需调用geocodeQuery("Queens, NY", "Queens")

function geocodeQuery(query, title) {
    //If search manager is not defined, load the search module.
    if (!searchManager) {
        //Create an instance of the search manager and call the geocodeQuery function again.
        Microsoft.Maps.loadModule('Microsoft.Maps.Search', function () {
            searchManager = new Microsoft.Maps.Search.SearchManager(map);
            geocodeQuery(query, title);
        });
    } else {
        var searchRequest = {
            where: query,
            callback: function (r) {
                //Add the first result to the map and zoom into it.
                if (r && r.results && r.results.length > 0) {
                    var pin = new Microsoft.Maps.Pushpin(r.results[0].location, {
                        title: title,
                        text: '2'
                    });
                    map.entities.push(pin);
                    map.setView({ bounds: r.results[0].bestView });
                }
            },
            errorCallback: function (e) {
                //If there is an error, alert the user about it.
                alert("No results found.");
            }
        };
        //Make the geocode request.
        searchManager.geocode(searchRequest);
    }
}