Question

我正在使用诺基亚地图nokia.places.search.manager.findPlaces并获得最多100个结果。

但是我需要大约500或1000的无限结果。我怎么能得到它？

我的诺基亚功能：

nokia.places.search.manager.findPlaces({ searchTerm: searchterm, searchCenter: lat,lng ,
limit:100, didYouMean: 5 });

Answer 1

findPlaces是本地搜索。本地搜索的重点是小区域的结果。地点搜索的限制目前是100个地方，因为超出设定距离的地方不被认为是相关的。添加limit参数并不能保证您在给定的搜索区域内找到100个相关位置。

这里的技巧不是尝试发出1000个结果的请求，而是使用观察者并在地图的焦点移动时对最接近的100个结果发出一系列异步请求。在任何地图上放置数千个标记会导致它无法读取，缓慢且无响应。

尝试以下内容，当然还有app id and token。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<!-- 
    Example from Nokia Maps API Playground, for more information visit http://api.maps.nokia.com
 -->
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <meta http-equiv="X-UA-Compatible" content="IE=7; IE=EmulateIE9"/>
        <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
        <title>Nokia Maps API Example: Search by category</title>
        <meta name="description" content="Search by category"/>
        <meta name="keywords" content="search, services, places, category"/>
        <!-- For scaling content for mobile devices, setting the viewport to the width of the device-->
        <meta name=viewport content="width=device-width, height=device-height, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
        <!-- By default we add ?with=all to load every package available, it's better to change this parameter to your use case. Options ?with=maps|positioning|places|placesdata|directions|datarendering|all -->
        <script type="text/javascript" charset="UTF-8" src="http://api.maps.nokia.com/2.2.3/jsl.js?with=all"></script>
        <!-- JavaScript for example container (NoteContainer & Logger)  -->
        <style type="text/css">
            html {
                overflow:hidden;
            }

            body {
                margin: 0;
                padding: 0;
                overflow: hidden;
                width: 100%;
                height: 100%;
                position: absolute;
            }

            #mapContainer {
                width: 80%;
                height: 80%;
                left: 0;
                top: 0;
                position: absolute;
            }
            #progress {
                width: 80%;
                height: 10%;
                left: 0;
                top: 80%;
                position: absolute;
            }
            #buttons {
                width: 80%;
                height: 10%;
                left: 0;
                top: 90%;
                position: absolute;
            }
        </style>
    </head>
    <body>
        <div id="mapContainer"></div>
        <div id="progress"></div>

        <script type="text/javascript" id="exampleJsSource">
/*  Set authentication token and appid 
*   WARNING: this is a demo-only key
*   please register on http://api.developer.nokia.com/ 
*   and obtain your own developer's API key 
*/
nokia.Settings.set("appId", "MY APP ID"); 
nokia.Settings.set("authenticationToken", "MY TOKEN");


// Get the DOM node to which we will append the map
var mapContainer = document.getElementById("mapContainer");
// Create a map inside the map container DOM node
var map = new nokia.maps.map.Display(mapContainer, {
    // Initial center and zoom level of the map
    center: [52.51, 13.4],
    zoomLevel: 13,
    components: [       
        new nokia.maps.map.component.Behavior()
    ]
});

var searchManager = nokia.places.search.manager,
    resultSet;




// Function for receiving search results from places search and process them
var processResults = function (data, requestStatus, requestId) {
    var i, len, locations, marker;
    if (requestStatus == "OK") {
        // The function findPlaces() and reverseGeoCode() of  return results in slightly different formats
        locations = data.results ? data.results.items : [data.location];
        // We check that at least one location has been found
        if (locations.length > 0) {
            // Remove results from previous search from the map
            if (resultSet) map.objects.remove(resultSet);
            // Convert all found locations into a set of markers
            resultSet = new nokia.maps.map.Container();
            for (i = 0, len = locations.length; i < len; i++) {
                marker = new nokia.maps.map.StandardMarker(locations[i].position, { text: i+1 });
                resultSet.objects.add(marker);
            }
            // Next we add the marker(s) to the map's object collection so they will be rendered onto the map
            map.objects.add(resultSet);
            // We zoom the map to a view that encapsulates all the markers into map's viewport
            //map.zoomTo(resultSet.getBoundingBox(), true);

        } else { 
            //alert("Your search produced no results!");
        }
         searching = false;
    } else {
        alert("The search request failed");
        searching = false;
    }
};



// Binding of DOM elements to several variables so we can install event handlers.
var progressUiElt = document.getElementById("progress");

// This function is called whenever we make a search
var searching = false;
search = function(searchCenter){
// Make a place search request
var category = "eat-drink"
progressUiElt.innerHTML = "Looking for places in the '" + category + "' category...'";
searchManager.findPlacesByCategory({
    category: category,
    onComplete: processResults,
    searchCenter: searchCenter,
    limit: 50,
});
}


search(new nokia.maps.geo.Coordinate(52.51, 13.4));



// This observer will call the search function if the center of the map is moved
// Beyond the area covered in the previous search
var centerObserver = function (obj, key, newValue, oldValue) {
    if ((searching == false) && (resultSet.getBoundingBox().contains(newValue) == false) ){
        searching = true;
        search(newValue);
    }

};

map.addObserver("center", centerObserver );


        </script>
    </body>
</html>

在诺基亚地图中获得无限的结果？

1 个答案: