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我在Google地图上显示路线,一切正常。问题是当我更新其中一个标记(出发或到达)时,新标记将被添加到地图中,而不是删除前一个标记。我试图将directionsDisplay设置为全局变量,但无法解决问题。在显示新路线之前有没有办法清除地图?更改路线时显示多个标记的地图
这里是它的样子:
我也试过这对API的建议:
directionDisplay = new google.maps.DirectionsRenderer();
directionDisplay.suppressMarkers = true;
directionDisplay.setMap(null);![enter image description here][1]
感谢您的帮助
我的代码是
var map = drawMap(map, mapOptions);
var departure;
var arrival;
var marker = createMarker();
function mainMap(mapOptions) {
departure1 = '#autocomplete_departure';
arrival1 = '#autocomplete_arrival';
var placeDeparture = getAddress(departure1);
var placeArrival = getAddress(arrival1);
google.maps.event.addListener(placeDeparture, 'place_changed', function(){
placeMarker(placeDeparture, departure1);
});
google.maps.event.addListener(placeArrival, 'place_changed', function(){
placeMarker(placeArrival, arrival1);
});
};
function setMarkerPosition(marker, place){
marker.setPosition(place.geometry.location);
marker.setMap(map);
}
function drawMap(){
return new google.maps.Map(map, mapOptions);
}
function createMarker(){
var markerOptions = {
map: map
}
return new google.maps.Marker(markerOptions);
}
function placeMarker(place, stop){
var place = place.getPlace();
if (place.geometry.viewport) {
map.fitBounds(place.geometry.viewport);
} else {
map.setCenter(place.geometry.location);
map.setZoom(17);
}
marker.setPosition(place.geometry.location);
marker.setMap(map);
if (stop == '#autocomplete_departure') {
departure = stop;
} else if (stop == '#autocomplete_arrival') {
arrival = stop;
}
if (arrival !== undefined && departure !== undefined) {
updateRouteOnMap(arrival, departure);
}
function updateRouteOnMap(departure, arrival){
var from = $(departure).val();
var to = $(arrival).val();
var request = {
origin: from,
destination: to,
travelMode: google.maps.TravelMode.DRIVING
};
var directionsDisplay;
if (directionsDisplay != undefined) directionsDisplay.setMap(null);
directionsService = new google.maps.DirectionsService();
directionsDisplay = new google.maps.DirectionsRenderer();
directionsDisplay.setMap(map);
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
$("#directions-panel").html()
directionsDisplay.setPanel(document.getElementById('directions-panel'));
}
else{
alert("there has been an error. Please try again!")
}
});
请提供[最小,完整,测试和可读示例](http://stackoverflow.com/help/mcve)。在覆盖之前,您需要从地图上隐藏/删除“标记”变量。 – geocodezip 2014-11-03 20:47:49
嗨,谢谢你的回答,这是我的第一篇文章,所以下次会试着多加注意。我把地图的整个代码放在地图上,因为我试图在询问但是没有得到任何结果之前去除不同部分的市场,所以我对如何进行操作有点困惑。感谢您的帮助 – user3623363 2014-11-04 20:35:51
我已经清除了相关位的代码。我试过在调用DirectionsRenderer()之前使用函数删除标记,但没有做任何结果。任何建议?谢谢 – user3623363 2014-11-07 10:20:02