当您在 Google map 上移动时，我正在尝试获取 LatLng 点。我已将 domListener 添加到我的 map 中，但是当我尝试访问 event.latLng 时，它返回未定义。当我尝试调用函数 addPointsToArray 时，变量 pnt 始终未定义。
我的代码是
<html>
<body>
<div>
<button id="move-mode" onClick="moveMode()">Move</button>
<button id="draw-mode" onClick="drawMode()">Draw</button>
</div>
<script>
var map;
var points = [];
var modeType;
var bMouseDown;
var poly;
function moveMode() {
//alert("Move Mode Clicked");
modeType = 'move';
if ("ontouchend" in document) {
return;
}
var options = {
draggable: true,
panControl: true,
scrollwheel: true
};
map.setOptions(options);
}
function drawMode() {
//alert("Draw Mode Clicked");
console.log("Draw Mode");
modeType = 'draw';
if ("ontouchend" in document) {
return;
}
var options = {
draggable: false,
panControl: false,
scrollwheel: false
};
map.setOptions(options);
}
function initialize() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: new google.maps.LatLng(32.7150, -117.1625),
disableDefaultUI: true,
zoomControl: true,
mapTypeControl: true,
mapTypeControlOptions: {
style: google.maps.MapTypeControlStyle.DROPDOWN_MENU,
mapTypeIds: [
google.maps.MapTypeId.ROADMAP,
google.maps.MapTypeId.TERRAIN,
google.maps.MapTypeId.SATELLITE
]
}
});
bMouseDown = false;
var polyOptions = {
strokeWeight: 0,
fillOpacity: 0.45,
editable: true
};
google.maps.event.addDomListener(map.getDiv(), 'mousedown', function (e) {
//do it with the right mouse-button only
if (e.button != 1 && modeType != "draw") {
return;
}
bMouseDown = true;
//the polygon
poly = new google.maps.Polyline({
map: map, clickable: false
});
//move-listener
var move = google.maps.event.addListener(map, 'mousemove', function (eventPoint) {
poly.getPath().push(eventPoint.latLng);
addPointsToArray(eventPoint.latLng);
});
//mouseup-listener
google.maps.event.addListenerOnce(map, 'mouseup', function (e) {
google.maps.event.removeListener(move);
bMouseDown = false;
arrayOfPoints.push(points);
points = [];
polylinesArray.push(poly);
if (document.getElementById('overlay').value == 'Polygon') {
var path = poly.getPath();
poly.setMap(null);
poly = new google.maps.Polygon({map: map, path: path});
polylinesArray.push(poly);
} else {
polylinesArray.push(poly);
}
});
});
}
function addPointsToArray(pnt) {
if (bMouseDown == true && modeType == 'draw') {
points.push(pnt);
console.log(pnt);
}
}
</script>
</body>
</html>
当我尝试插入向上点数组时，pnt 始终未定义。
我是 javascript 和 Google Maps api 的新手，因此任何帮助将不胜感激
最佳答案
您的问题不是标题中描述的问题。 eventPoint.latLng 始终已定义。当您处理 arrayOfPoints 以将其显示在文本框中时，您正在寻找 google.maps.LatLng 的 .latitude 和 .longitude 属性。 。这些不存在，您需要使用 google.maps.LatLng 记录的 .lat() 和 .lng() 方法对象来获取这些值。
function createFarm() {
document.getElementById('search-field').value = "";
var xmlString = "";
for (var i = 0; i < arrayOfPoints.length; ++i) {
xmlString += '<Shape><Points>';
var singleArrayOfPoints = arrayOfPoints[i];
for (var j = 0; j < singleArrayOfPoints.length; ++j) {
xmlString += "<Point><Latitude>" + singleArrayOfPoints[j].lat() + "</Latitude><Longitude>" +
singleArrayOfPoints[j].lng( + "</Longitude></Point>";
}
xmlString += "</Points></Shape>";
}
document.getElementById('search-field').value = xmlString;
}
关于javascript - Event.LatLng 返回未定义，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/33682612/