我想使用一个边界框调用nokia.places.search.manager.findPlaces。我希望边界框对应于页面上显示的地图。我在http://developer.here.com/maps_js上找不到我期望的方法。
您需要的方法是Display.getViewBounds()。引用API参考:
此方法检索地图视图的外部边界框覆盖所有可见点的最小边界框。
下面是一个在位置搜索中使用boundingBox参数的例子(当然使用你自己的应用id和令牌)。如果增加显示的map的zoomLevel，则搜索将被限定在较小的区域内。最重要的部分在最下面。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<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>HERE Maps API Example: Search by bounding box</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">
nokia.Settings.set("appId", "YOUR APP ID");
nokia.Settings.set("authenticationToken", "YOUR 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: 15,
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");
var searching = false;
search = function(boundingBox){
// Make a place search request
var category = "eat-drink"
progressUiElt.innerHTML = "Looking for places in the '" + category + "' category...'";
searchManager.findPlacesByCategory({
category: category,
onComplete: processResults,
boundingBox: boundingBox,
limit: 50,
});
}
search(map.getViewBounds());
</script>
</body>
</html>