javascript Google Maps API marker.setPosition() 不工作
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Google Maps API marker.setPosition() not working
提问by YOhan
I'm working with Google Maps API v3 (javascript). I need to put marker on map if coordinates exist in the model (.NET MVC 4). Coordinates are put to view correctly and I know that because map is being centered and zoomed correctly. Problem is - I cannot use function marker.setPosition();, in javascript console I get error:
我正在使用 Google Maps API v3 (javascript)。如果模型（.NET MVC 4）中存在坐标，我需要在地图上放置标记。坐标被正确查看，我知道这是因为地图被正确居中和缩放。问题是 - 我无法使用 function marker.setPosition();，在 javascript 控制台中出现错误：
TypeError: a.Xa is undefined
...c){4>a.A++?c?a.e.e(b):a.e.j(b):a.b=h;a.d||(a.d=re(a.F))}oJ[H].j=function(){this....
类型错误：a.Xa 未定义
...c){4>a.A++?c?aee(b):aej(b):ab=h;ad||(ad=re(aF))}oJ[H].j=function() {这....
My code:
我的代码：
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?libraries=places&sensor=false&[email protected](0, UICulture.IndexOf("-"))"></script>
<script>
function initialize() {
var mapOptions = {
center: new google.maps.LatLng('@Model.CoordinatesLatitude' != '0.0' ? '@Model.CoordinatesLatitude' : 55.169438,
'@Model.CoordinatesLongitude' != '0.0' ? '@Model.CoordinatesLongitude' : 23.881275),
zoom: '@Model.CoordinatesLatitude' != '0.0' ? 17 : 7,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
var input = document.getElementById('searchMap');
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
});
if ('@Model.CoordinatesLatitude' != '0.0' && '@Model.CoordinatesLongitude' != '0.0') {
var position = new google.maps.LatLng(parseFloat('@Model.CoordinatesLatitude'), parseFloat('@Model.CoordinatesLongitude'));
console.log(position);
var img = {
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.setIcon(img);
marker.setPosition(position);
marker.setVisible(true);
}
google.maps.event.addListener(autocomplete, 'place_changed', function () {
infowindow.close();
marker.setVisible(false);
var place = autocomplete.getPlace();
if (!place.geometry) {
return;
}
if (place.geometry.viewport) {
map.fitBounds(place.geometry.viewport);
} else {
map.setCenter(place.geometry.location);
map.setZoom(17);
}
var image = {
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.setIcon(image);
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(' ');
$('#coordLat').val(place.geometry.location.lat());
$('#coordLng').val(place.geometry.location.lng());
$('#ExternalId').val(place.id);
}
infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
infowindow.open(map, marker);
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
I've debugged my code and coordinates are correct. Doesn't matter if I use parseFloat or not, the same error is thrown. If I use constructor and set position: position, it throws the same error.
我已经调试了我的代码并且坐标是正确的。不管我是否使用 parseFloat，都会抛出同样的错误。如果我使用构造函数和 set position: position，它会抛出相同的错误。
采纳答案by YOhan
I've resolved this like this (putting coordinates to center location and then setting marker on center):
我已经解决了这个问题（将坐标置于中心位置，然后在中心设置标记）：
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?libraries=places&sensor=false&[email protected](0, UICulture.IndexOf("-"))"></script>
<script>
function initialize() {
var cnt = new google.maps.LatLng(55.169438, 23.881275);
var zoom = 7;
if ('@Model.CoordinatesLatitude' != '0.0' && '@Model.CoordinatesLongitude' != '0.0') {
var latitude = parseFloat('@Model.CoordinatesLatitude');
var longitude = parseFloat('@Model.CoordinatesLongitude');
cnt = new google.maps.LatLng(latitude, longitude);
zoom = 17;
}
var mapOptions = {
center: cnt,
zoom: zoom,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map_canvas'),
mapOptions);
var input = document.getElementById('searchMap');
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
});
if ('@Model.CoordinatesLatitude' != '0.0' && '@Model.CoordinatesLongitude' != '0.0') {
marker.setPosition(cnt);
}
google.maps.event.addListener(autocomplete, 'place_changed', function () {
infowindow.close();
marker.setVisible(false);
var place = autocomplete.getPlace();
if (!place.geometry) {
return;
}
if (place.geometry.viewport) {
map.fitBounds(place.geometry.viewport);
} else {
map.setCenter(place.geometry.location);
map.setZoom(17);
}
var image = {
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.setIcon(image);
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(' ');
$('#coordLat').val(place.geometry.location.lat());
$('#coordLng').val(place.geometry.location.lng());
$('#ExternalId').val(place.id);
}
infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + address);
infowindow.open(map, marker);
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
