javascript - 在 google maps api v3 (javascript) 中获取 dragend 标记的旧位置

Question

您好，我在网上搜索过，但找不到答案，所以我需要您的宝贵帮助。这是我的代码:

    for(var i=0; i<10;i++){         
        LatLon=new google.maps.LatLng(39.633336, 22.386423);
        Marker= new google.maps.Marker({position:LatLon,map:MyMap,draggable: true,title:'Mytitle'+i});
        MarkersArray[] = Marker; //keep markers in array because i want to delete them later!!!
        google.maps.event.addListener(Marker,"dragend",function(event){
            var markerNewPosition = this.getPosition();
            alert("old position: **here i want to show the old position** \nnew position: "+markerNewPosition);
        });
    }

直到现在，当我拖动标记时，我会提醒它新位置的纬度和经度。但我想要更多!我想提醒旧位置的经纬度。换句话说，我希望在 dragend 处理程序中获取标记所在的前一个位置的坐标和标记所在的新位置的坐标。有人知道怎么做吗？任何想法将不胜感激。先感谢您!

Answer 1

您需要使用 dragstart 事件监听器来获取它。你可以这样存储:

var GLOBAL = {};

...

google.maps.event.addListener(Marker,"dragstart",function(event){
    var markerOldPosition = this.getPosition();
    GLOBAL.startDragPosition = markerOldPosition;

});
google.maps.event.addListener(Marker,"dragend",function(event){
    var markerNewPosition = this.getPosition();
    alert("old position: " + GLOBAL.startDragPosition + " \nnew position: "+markerNewPosition);
    delete GLOBAL.startDragPosition;
});