“marker.setVisible(false)”与“和“marker.setMap(null)”。在谷歌地图v3? [英] What is the difference between "marker.setVisible(false)" and "marker.setMap(null)" in Google Maps v3?
问题描述
marker.setVisible(false)$ c $之间的区别是什么? c>和
marker.setMap(null)
?
但我不知道,哪一个是正确的?
这两种方法之间的区别似乎没有明确记录。但是,请注意以下几点: 当您使用 另外,
setMap(null)
,您的标记将失去对 Map
的引用。如果您不保留对 Map
对象的引用,则无法重新显示标记。
setMap()
方法不会触发 visible_changed
事件,而 setVisible()
方法(如果可见性实际被切换)。
var map = new google.maps.Map(document.getElementById('map'),{
zoom:4,
center:new google.maps.LatLng(-25.363,131.044),
mapTypeId:google.maps.MapTypeId.ROADMAP
});
var marker = new google.maps.Marker({
position:new google.maps.LatLng(-25.363,131.044),
map:map
} );
google.maps.event.addListener(marker,'visible_changed',function(){
console.log('visible_changed triggered');
});
marker.setVisible(false); // visible_changed triggered
marker.setVisible(true); // visible_changed triggered
marker.setMap(null); // visible_changed not triggered
marker.setMap(map); // visible_changed not triggered
我想我们应该使用 setVisible(false )
方法,当我们打算再次在地图上重新显示标记时,以及 setMap(null)
,当我们不再显示它时。 / p>
I want to clear a marker on Google Maps.
What is the difference between marker.setVisible(false)
and marker.setMap(null)
?
But I don't know, which is right?
The difference between the two methods does not seem to be clearly documented. However, note the following:
When you use
setMap(null)
, your marker will lose the reference to theMap
. If you do not keep a reference to theMap
object, you wouldn't be able to reshow the marker.In addition, the
setMap()
method will not trigger thevisible_changed
event, while thesetVisible()
method does (if the visibility is actually toggled).
Example:
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: new google.maps.LatLng(-25.363, 131.044),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var marker = new google.maps.Marker({
position: new google.maps.LatLng(-25.363, 131.044),
map: map
});
google.maps.event.addListener(marker, 'visible_changed', function() {
console.log('visible_changed triggered');
});
marker.setVisible(false); // visible_changed triggered
marker.setVisible(true); // visible_changed triggered
marker.setMap(null); // visible_changed not triggered
marker.setMap(map); // visible_changed not triggered
I guess we should be using the setVisible(false)
method when we intend to reshow the marker again on the map, and the setMap(null)
when we will not be showing it again.
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