Answers:
InfoWindows 有一个close（）函数。只需跟踪最后打开的窗口，并在创建新窗口时调用它的关闭函数即可。
该演示具有所需的功能。我在Maps API V3演示库中找到了它。
使用许多信息窗口的替代解决方案：将先前打开的信息窗口保存在变量中，然后在打开新窗口时将其关闭
var prev_infowindow =false;
...
base.attachInfo = function(marker, i){
var infowindow = new google.maps.InfoWindow({
content: 'yourmarkerinfocontent'
});
google.maps.event.addListener(marker, 'click', function(){
if( prev_infowindow ) {
prev_infowindow.close();
}
prev_infowindow = infowindow;
infowindow.open(base.map, marker);
});
}//assuming you have a map called 'map'
var infowindow = new google.maps.InfoWindow();
var latlng1 = new google.maps.LatLng(0,0);
var marker1 = new google.maps.Marker({position:latlng1, map:map});
google.maps.event.addListener(marker1, 'click',
function(){
infowindow.close();//hide the infowindow
infowindow.setContent('Marker #1');//update the content for this marker
infowindow.open(map, marker1);//"move" the info window to the clicked marker and open it
}
);
var latlng2 = new google.maps.LatLng(10,10);
var marker2 = new google.maps.Marker({position:latlng2, map:map});
google.maps.event.addListener(marker2, 'click',
function(){
infowindow.close();//hide the infowindow
infowindow.setContent('Marker #2');//update the content for this marker
infowindow.open(map, marker2);//"move" the info window to the clicked marker and open it
}
);这会将信息窗口“移动”到每个单击的标记周围，实际上将其自身关闭，然后在其新位置重新打开（并平移以适合视口）。打开之前会更改其内容以提供所需的效果。适用于n个标记。
我的解决方案。
var map;
var infowindow = new google.maps.InfoWindow();
...
function createMarker(...) {
var marker = new google.maps.Marker({
...,
descrip: infowindowHtmlContent
});
google.maps.event.addListener(marker, 'click', function() {
infowindow.setOptions({
content: this.descrip,
maxWidth:300
});
infowindow.open(map, marker);
});通过此链接http://www.svennerberg.com/2009/09/google-maps-api-3-infowindows/：
Teo：最简单的方法是让InfoWindow对象的一个实例一次又一次地重复使用。这样，当您单击新标记时，infoWindow将从当前所在的位置“移动”到新标记。
使用其setContent方法将其加载正确的内容。
为活动窗口声明一个变量
var activeInfoWindow; 并将此代码绑定到标记侦听器中
marker.addListener('click', function () {
if (activeInfoWindow) { activeInfoWindow.close();}
infowindow.open(map, marker);
activeInfoWindow = infowindow;
});除了使用close（）函数外，还有一种更简单的方法。如果使用InfoWindow属性创建变量，则在打开另一个变量时它将自动关闭。
var info_window;
var map;
var chicago = new google.maps.LatLng(33.84659, -84.35686);
function initialize() {
var mapOptions = {
center: chicago,
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
info_window = new google.maps.InfoWindow({
content: 'loading'
)};
createLocationOnMap('Location Name 1', new google.maps.LatLng(33.84659, -84.35686), '<p><strong>Location Name 1</strong><br/>Address 1</p>');
createLocationOnMap('Location Name 2', new google.maps.LatLng(33.84625, -84.36212), '<p><strong>Location Name 1</strong><br/>Address 2</p>');
}
function createLocationOnMap(titulo, posicao, conteudo) {
var m = new google.maps.Marker({
map: map,
animation: google.maps.Animation.DROP,
title: titulo,
position: posicao,
html: conteudo
});
google.maps.event.addListener(m, 'click', function () {
info_window.setContent(this.html);
info_window.open(map, this);
});
}var map;
var infowindow;
...
function createMarker(...) {
var marker = new google.maps.Marker({...});
google.maps.event.addListener(marker, 'click', function() {
...
if (infowindow) {
infowindow.close();
};
infowindow = new google.maps.InfoWindow({
content: contentString,
maxWidth: 300
});
infowindow.open(map, marker);
}
...
function initialize() {
...
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
...
google.maps.event.addListener(map, 'click', function(event) {
if (infowindow) {
infowindow.close();
};
...
}
}怎么样 -
google.maps.event.addListener(yourMarker, 'mouseover', function () {
yourInfoWindow.open(yourMap, yourMarker);
});
google.maps.event.addListener(yourMarker, 'mouseout', function () {
yourInfoWindow.open(yourMap, yourMarker);
});然后，您只需将鼠标悬停在它上面，它就会自行关闭。
如果您在for循环中使用了许多标记（这是Django，请参见此处），这就是我使用的方法。您可以在每个标记上设置一个索引，并在每次打开窗口时设置该索引。关闭先前保存的索引：
markers = Array();
infoWindows = Array();
var prev_infowindow =false;
{% for obj in objects %}
var contentString = 'your content'
var infowindow = new google.maps.InfoWindow({
content: contentString,
});
var marker = new google.maps.Marker({
position: {lat: {{ obj.lat }}, lng: {{ obj.lon }}},
map: map,
title: '{{ obj.name }}',
infoWindowIndex : {{ forloop.counter0 }}
});
google.maps.event.addListener(marker, 'click',
function(event)
{
if( prev_infowindow ) {
infoWindows[prev_infowindow].close();
}
prev_infowindow = this.infoWindowIndex;
infoWindows[this.infoWindowIndex].open(map, this);
}
);
infoWindows.push(infowindow);
markers.push(marker);
{% endfor %}