问题描述
我正尝试从谷歌地图清除以前的路线。但是当你做另一个搜索时,来自先前搜索的Polyline和标记仍然显示。我尝试过使用directionsRenderer.setMap(null),但它没有任何区别。任何想法我做错了什么?
(function(){
Maps.Directions = function(googleMap,数据,选项){
var directionsService = new google.maps.DirectionsService(),
directionsRenderer = new google.maps.DirectionsRenderer();
$ b $ function getDirections(){
directionsService.route(data.request,function(response,status){
if(status === google.maps.DirectionsStatus.OK){
directionsRenderer.setDirections(response);
$
$ R $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ ;
})();
这是因为您正在初始化一个新的 directionsRenderer
在函数的每次调用中。
使DirectionsRenderer更具全球性。和首先 setMap(null)
,然后初始化,然后 setMap(googleMap)
像这样:
(function(){
var directionsRenderer;
Maps .Directions = function(googleMap,data,options){
if(directionsRenderer){
directionsRenderer.setMap(null);
}
var directionsService = new google.maps.DirectionsService ();
directionsRenderer = new google.maps.DirectionsRenderer();
function getDirections(){
directionsService.route(data.request,function(response,status){
if(status === google.maps.DirectionsStatus.OK){
directionsRenderer.setDirections(response);
}
});
}
directionsRenderer.setMap(googleMap);
getDirections();
};
})();
I am trying to clear previous directions from a Google Map. But when you do another search, the Polyline and markers from the previous search still show. I have tried using directionsRenderer.setMap(null), but it doesn't make any difference. Any ideas what I'm doing wrong?
(function () {
Maps.Directions = function(googleMap, data, options) {
var directionsService = new google.maps.DirectionsService(),
directionsRenderer = new google.maps.DirectionsRenderer();
function getDirections() {
directionsService.route(data.request, function(response, status) {
if (status === google.maps.DirectionsStatus.OK) {
directionsRenderer.setDirections(response);
}
});
}
directionsRenderer.setMap(null);
directionsRenderer.setMap(googleMap);
getDirections();
};
})();
This is because you are initializing a new directionsRenderer
in every call of the function.
Make the directionsRenderer little more global. and first setMap(null)
, then initialize, then setMap(googleMap)
Like this:
(function () {
var directionsRenderer;
Maps.Directions = function(googleMap, data, options) {
if(directionsRenderer){
directionsRenderer.setMap(null);
}
var directionsService = new google.maps.DirectionsService();
directionsRenderer = new google.maps.DirectionsRenderer();
function getDirections() {
directionsService.route(data.request, function(response, status) {
if (status === google.maps.DirectionsStatus.OK) {
directionsRenderer.setDirections(response);
}
});
}
directionsRenderer.setMap(googleMap);
getDirections();
};
})();
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