为什么我的Google地图事件监听器无法正常工作?

时间:2015-08-13 08:44:47

标签: javascript google-maps markerclusterer sapui5

我正在尝试为每个标记(有30个标记)处理鼠标悬停,并显示这些标记的信息。我为每个标记创建了监听器,但当我的鼠标悬停在某个标记上时,它始终显示最后一个标记的infowindows。总结一下,我不能听其他标记。任何帮助,将不胜感激。在此先感谢我的代码:

var listeners = [];
for(var i = 0; i < markers.length; i++){
  var marker = markers[i];
  var contentString = contents[i];
  listeners[i] = new google.maps.event.addListener(marker, 'mouseover', function() {
    var hideInfoWindows = function(){
        for (var j = 0; j < util.Common.infowindows.length; j++) {
          util.Common.infowindows[j].close(); 
        }
    }
    var addInfoWindow = function(){
        var infowindow = new google.maps.InfoWindow({
            content: contentString
        });
        //hideInfoWindows();
        util.Common.infowindows.push(infowindow);
        infowindow.open(util.Common.googlemap,marker);
    }
    addInfoWindow();
  });
}

我也在使用js cluster library,但我不认为问题与此有关。

1 个答案:

答案 0 :(得分:1)

我认为你的问题可能是你没有在循环中使用闭包,当触发事件监听器时,markercontentString变量指向最后一个标记。 / p>

尝试重写这样的循环:

var listeners = [];
for(var i = 0; i < markers.length; i++){
    (function(index){ //create a closure, variable 'index' will take its value from variable i, but won't be affected by changed i in the outer scope
        var marker = markers[index]; //use this scope's index variable instead of i
        var contentString = contents[index]; //use this scope's index variable instead of i
        listeners[index] = new google.maps.event.addListener(marker, 'mouseover', function() {
            var hideInfoWindows = function(){
                for (var j = 0; j < util.Common.infowindows.length; j++) {
                    util.Common.infowindows[j].close();
                }
            };
            var addInfoWindow = function(){
                var infowindow = new google.maps.InfoWindow({
                    content: contentString
                });
                //hideInfoWindows();
                util.Common.infowindows.push(infowindow);
                infowindow.open(util.Common.googlemap,marker);
            };
            addInfoWindow();
        });
    })(i);
}