我正在努力制作一个路线规划器,允许用户点击地图上的随机点并创建路线。 现在我在将值输入折线变量时遇到了一些麻烦 我在google上搜索过,但我似乎无法找到一种方法来继续在现有值之上添加值。这些值来自地图上的click事件。
那么如何在每次点击事件中为具有相同格式的变量添加值?
function initMap() {
var location = {
lat: 51.3554957,
lng: 5.4533268000000135
};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 12,
center: location
});
google.maps.event.addListener(map, "click", function(event) {
var latitude = event.latLng.lat();
var longitude = event.latLng.lng();
console.log(latitude + ', ' + longitude);
});
var flightPlanCoordinates = [{
lat: 37.772,
lng: -122.214
},
{
lat: 21.291,
lng: -157.821
},
{
lat: -18.142,
lng: 178.431
},
{
lat: -27.467,
lng: 153.027
}
];
var flightPath = new google.maps.Polyline({
path: flightPlanCoordinates,
geodesic: true,
strokeColor: '#FF0000',
strokeOpacity: 1.0,
strokeWeight: 2
});
flightPath.setMap(map);
}
<!DOCTYPE html>
<html>
<head>
<style>
#map {
height: 600px;
width: 100%;
}
</style>
</head>
<body>
<h3>My Google Maps Demo</h3>
<div id="map"></div>
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBpQwkFGfliyQ_B52NBJFEyQd1_fD8gV6g&callback=initMap">
</script>
</body>
</html>
预期结果(4次点击):
var flightPlanCoordinates = [{
lat: 37.772,
lng: -122.214
},
{
lat: 21.291,
lng: -157.821
},
{
lat: -18.142,
lng: 178.431
},
{
lat: -27.467,
lng: 153.027
}
];
提前致谢!
答案 0 :(得分:1)
看看以下内容:
function initMap() {
var flightPlanCoordinates = [];
var location = {
lat: 51.3554957,
lng: 5.4533268000000135
};
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 12,
center: location
});
google.maps.event.addListener(map, "click", function(event) {
var latitude = event.latLng.lat();
var longitude = event.latLng.lng();
console.log(latitude + ', ' + longitude);
flightPlanCoordinates.push({lat: latitude, lng: longitude});
var flightPath = new google.maps.Polyline({
path: flightPlanCoordinates,
geodesic: true,
strokeColor: '#FF0000',
strokeOpacity: 1.0,
strokeWeight: 2
});
flightPath.setMap(map);
});
}
<!DOCTYPE html>
<html>
<head>
<style>
#map {
height: 600px;
width: 100%;
}
</style>
</head>
<body>
<h3>My Google Maps Demo</h3>
<div id="map"></div>
<script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBpQwkFGfliyQ_B52NBJFEyQd1_fD8gV6g&callback=initMap">
</script>
</body>
</html>