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我目前有一張地圖在用戶地理位置上顯示一個標記。我有一個文本輸入字段設置爲自動完成位置。當用戶搜索城市名稱時，會在該位置放置一個新標記。但是，舊的凝膠定位標記仍然存在。我想刪除舊的標記或移動它，因此地圖上只有一個標記。我怎樣才能做到這一點？在Google地圖上移動Google地圖標記自動完成
這裏是我的代碼：
<html>
<head>
<script>
var map;
function initialize() {
var mapOptions = {
zoom: 12
};
map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
// Get GEOLOCATION
if(navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = new google.maps.LatLng(position.coords.latitude,
position.coords.longitude);
map.setCenter(pos);
var marker = new google.maps.Marker({
position: pos,
map: map,
draggable:true
});
}, function() {
handleNoGeolocation(true);
});
} else {
// Browser doesn't support Geolocation
handleNoGeolocation(false);
}
function handleNoGeolocation(errorFlag) {
if (errorFlag) {
var content = 'Error: The Geolocation service failed.';
} else {
var content = 'Error: Your browser doesn\'t support geolocation.';
}
var options = {
map: map,
position: new google.maps.LatLng(60, 105),
content: content
};
map.setCenter(options.position);
}
// get places auto-complete when user type in location-text-box
var input = /** @type {HTMLInputElement} */(
document.getElementById('location-text-box'));
var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.bindTo('bounds', map);
var infowindow = new google.maps.InfoWindow();
var marker = new google.maps.Marker({
map: map,
anchorPoint: new google.maps.Point(0, -29),
draggable:true
});
google.maps.event.addListener(autocomplete, 'place_changed', function() {
infowindow.close();
marker.setVisible(false);
var place = autocomplete.getPlace();
if (!place.geometry) {
return;
}
// If the place has a geometry, then present it on a map.
if (place.geometry.viewport) {
map.fitBounds(place.geometry.viewport);
} else {
map.setCenter(place.geometry.location);
map.setZoom(17); // Why 17? Because it looks good.
}
marker.setIcon(/** @type {google.maps.Icon} */({
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(35, 35)
}));
marker.setPosition(place.geometry.location);
marker.setVisible(true);
var address = '';
if (place.address_components) {
address = [
(place.address_components[0] && place.address_components[0].short_name || ''),
(place.address_components[1] && place.address_components[1].short_name || ''),
(place.address_components[2] && place.address_components[2].short_name || '')
].join(' ');
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div>
<input type="text" id="location-text-box">
<div id="map-canvas"></div>
</div>
</body>
</html>
類似的問題：[使用Google Maps API進行地理編碼 - updat現有的標記，而不是添加另一個]（http://stackoverflow.com/questions/12628994/geocoding-with-google-maps-api-updating-existing-marker-rather-than-adding-ano） – geocodezip 2015-02-08 19:32:57