我正在尝试在地图上放置多个标记。为此，我遵循了这个程序
https://developers.google.com/maps/documentation/javascript/examples/places-autocomplete?csw=1
但是在这里，一旦用户开始为另一个标记键入，那么第一个标记将被第二个标记替换。为此，我在自动完成功能中初始化了标记，以便在用户输入第二个标记时创建另一个标记。这很好。另一个标记是固定。但是在点击标记时，由于infowindow在自动完成功能中，它不会产生信息。
我需要infowindow所有标记。
<script>
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(-33.8688, 151.2195),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
var input = /** @type {HTMLInputElement} */(document.getElementById('searchTextField'));
var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.bindTo('bounds', map);
var infowindow = new google.maps.InfoWindow();
google.maps.event.addListener(autocomplete, 'place_changed', function() {
var marker = new google.maps.Marker({
map: map
});
infowindow.close();
marker.setVisible(false);
input.className = '';
var place = autocomplete.getPlace();
if (!place.geometry) {
// Inform the user that the place was not found and return.
input.className = 'notfound';
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.
}
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(' ');
}
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),
}));
if (address.length != 0) {
address = place.name + ', ' + address;
} else {
address = place.name;
}
marker.setPosition(place.geometry.location);
marker.setTitle(address);
marker.setVisible(true);
infowindow.setContent('<div><strong>' + marker.title + '</strong><br>');
infowindow.open(map, marker);
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
由于没有动作监听器，因此infowindow将不起作用。所以我写了下面的代码。
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(map, marker);
});
但它不会起作用，因为标记超出了范围变量。这该怎么做？请帮忙
答案 0 :(得分：1)
使用createMarker函数在infowindow内容上保存函数闭包。
<script type="text/javascript">
var map = null;
var infowindow = new google.maps.InfoWindow();
function createMarker(place) {
var marker = new google.maps.Marker({
map: map
});
// 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.
}
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(' ');
}
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),
}));
if (address.length != 0) {
address = place.name + ', ' + address;
} else {
address = place.name;
}
marker.setPosition(place.geometry.location);
marker.setTitle(address);
marker.setVisible(true);
google.maps.event.addListener(marker, 'click', function(e) {
infowindow.setContent('<div><strong>' + marker.title + '</strong><br>');
infowindow.open(map, marker);
});
google.maps.event.trigger(marker, 'click');
}
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(-33.8688, 151.2195),
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById('map-canvas'),
mapOptions);
var input = /** @type {HTMLInputElement} */(document.getElementById('searchTextField'));
var autocomplete = new google.maps.places.Autocomplete(input);
autocomplete.bindTo('bounds', map);
google.maps.event.addListener(autocomplete, 'place_changed', function() {
infowindow.close();
input.className = '';
var place = autocomplete.getPlace();
if (!place.geometry) {
// Inform the user that the place was not found and return.
input.className = 'notfound';
return;
}
createMarker(place);
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>