[英]Google Maps API Geocode & Place markers
我正在嘗試合並此地理編碼api示例的代碼: https : //developers.google.com/maps/documentation/javascript/examples/geocoding-simple
以及一些以前可以在地圖上放置標記的工作代碼。 這是我的代碼:
<!DOCTYPE html>
<html>
<head>
<title>Remove Markers</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#floating-panel {
position: absolute;
top: 10px;
left: 25%;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: 'Roboto','sans-serif';
line-height: 30px;
padding-left: 10px;
}
</style>
</head>
<body>
<div id="floating-panel">
<input id="address" type="textbox" value="London, UK">
<input id="submit" type="button" value="Geocode">
<input onclick="deleteMarkers();" type=button value="Delete Markers">
</div>
<div id="map"></div>
<p>Click on the map to add markers.</p>
<script>
// In the following example, markers appear when the user clicks on the map.
// The markers are stored in an array.
// The user can then click an option to hide, show or delete the markers.
var map;
var markers = [];
function initMap() {
var haightAshbury = {lat: 51.5074, lng: 0.1278};
map = new google.maps.Map(document.getElementById('map'), {
zoom: 15,
center: haightAshbury,
mapTypeId: 'hybrid'
});
// This event listener will call addMarker() when the map is clicked.
map.addListener('click', function(event) {
addMarker(event.latLng);
});
// Adds a marker at the center of the map.
//addMarker(haightAshbury);
}
// Adds a marker to the map and push to the array.
function addMarker(location) {
var marker = new google.maps.Marker({
position: location,
map: map
});
markers.push(marker);
}
// Sets the map on all markers in the array.
function setMapOnAll(map) {
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(map);
}
}
// Removes the markers from the map, but keeps them in the array.
function clearMarkers() {
setMapOnAll(null);
}
// Shows any markers currently in the array.
function showMarkers() {
setMapOnAll(map);
}
// Deletes all markers in the array by removing references to them.
function deleteMarkers() {
clearMarkers();
markers = [];
}
var geocoder = new google.maps.Geocoder();
document.getElementById('submit').addEventListener('click', function() {
geocodeAddress(geocoder, map);
});
}
function geocodeAddress(geocoder, resultsMap) {
var address = document.getElementById('address').value;
geocoder.geocode({'address': address}, function(results, status) {
if (status === 'OK') {
resultsMap.setCenter(results[0].geometry.location);
var marker = new google.maps.Marker({
map: resultsMap,
position: results[0].geometry.location
});
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=XXXXXXXXXXX&callback=initMap">
</script>
</body>
</html>
在嘗試添加地理編碼之前,它一直在工作,出於明顯的原因,我刪除了API密鑰,知道我哪里出錯了嗎? 我對JavaScript比較陌生,因此非常喜歡反饋!
您的代碼將產生錯誤。 您可以通過移動以下代碼行來解決此問題...
var geocoder = new google.maps.Geocoder();
document.getElementById('submit').addEventListener('click', function() {
geocodeAddress(geocoder, map);
});
...位於initMap()中,因此該函數將如下所示:
function initMap() {
var haightAshbury = {lat: 51.5074, lng: 0.1278};
map = new google.maps.Map(document.getElementById('map'), {
zoom: 15,
center: haightAshbury,
mapTypeId: 'hybrid'
});
// This event listener will call addMarker() when the map is clicked.
map.addListener('click', function(event) {
addMarker(event.latLng);
});
// Adds a marker at the center of the map.
//addMarker(haightAshbury);
var geocoder = new google.maps.Geocoder();
document.getElementById('submit').addEventListener('click', function() {
geocodeAddress(geocoder, map);
});
}
始終記得檢查沒有成對的花括號。
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