这里我正在创建一个功能,我从JSON文件中检索纬度和经度。并在谷歌地图上显示标记。
但我的问题是只有一个标记显示在谷歌地图上。其他人没有表现出来。
这是我的json格式
{
"Data": {
"-template": "Parallax",
"Explore": {
"IslandLife": {
"TourismLocation": [
{
"Title": "Langkawi",
"Latitude": "6.350000",
"Longitude": "99.800000",
"YouTubePlaylistID": "UUnTJRksbHP4O8JSz00_XRQA",
"VideosList": {
"YouTubeVideoID": [
"7HlMpaSspNs",
"tzeRnbd77HU",
"VkIAbDIVJCA",
"ksJ6kwTe9wM"
]
}
},
{
"Title": "Rawa Island",
"Latitude": "2.520278",
"Longitude": "103.975833",
"YouTubePlaylistID": "UUnTJRksbHP4O8JSz00_XRQA",
"VideosList": { "YouTubeVideoID": "Kx0dUWaALKo" }
},
{
"Title": "Perhentian Island",
"Latitude": "5.903788",
"Longitude": "102.753737",
"YouTubePlaylistID": "UUnTJRksbHP4O8JSz00_XRQA",
"VideosList": {
"YouTubeVideoID": [
"ZpcdGk5Ee0w",
"TQTDOGpflZY"
]
}
},
{
"Title": "Sabah Marine Park",
"Latitude": "4.623326",
"Longitude": "118.719800",
"YouTubePlaylistID": "UUnTJRksbHP4O8JSz00_XRQA",
"VideosList": { "YouTubeVideoID": "VCDTEKOqpKg" }
}
]
}
}
}
}
这里是我的函数,我从json文件
上面检索纬度和lognitutde<script type="text/javascript">
$.getJSON('json/explore.json', function(data) {
$.each(data, function(key, val) {
for (var i = 0; i < val.Explore.IslandLife.TourismLocation.length; i++) {
PlotMarker(val.Explore.IslandLife.TourismLocation[i].Latitude, val.Explore.IslandLife.TourismLocation[i].Longitude);
}
});
});
function PlotMarker(lat, lang) {
var mapProp = {
center: new google.maps.LatLng(lat, lang),
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("gmap"), mapProp);
var marker = new google.maps.Marker({
position: new google.maps.LatLng(lat, lang),
});
marker.setMap(map);
}
google.maps.event.addDomListener(window, 'load', PlotMarker);
</script>
<body>
<div id="gmap" style="width: 800px; height:500px;"></div>
</body>
如何在地图上显示多个标记???
答案 0 :(得分:1)
您的问题在于范围 - 每次拨打PlotMarker
时都会重新创建地图 - 因此每次只添加一个标记。在PlotMarker
函数之外声明您的地图,例如:
initialize() {
var mapProp = {
center: new google.maps.LatLng(lat, lang),
zoom: 5,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("gmap"), mapProp);
}
function PlotMarker(lat, lang) {
var marker = new google.maps.Marker({
position: new google.maps.LatLng(lat, lang),
});
marker.setMap(map);
}
然后在页面加载时调用initialize()
- 同样,在调用PlotMarker函数之前确保映射存在。
使用一些示例代码的另一个好的答案:https://stackoverflow.com/a/7701386/1803682
答案 1 :(得分:1)
以下是我在项目中使用的工作示例
JS方法 AddInfoWidnow 用于将InfoWindow添加到标记。
function AddInfoWidnow(marker,message)
{
var infowindow = new google.maps.InfoWindow({ content: message });
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(marker.get('map'), marker);
});
}
在for循环中调用 AddInfoWidnow 方法
function ShowOnMap(ContainerId, mapItems) {
var DefaultLatLng= new google.maps.LatLng('12.967461', '79.941824');
var mapOptions = {
center: DefaultLatLng,
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP,
marker: true
};
var mapCust = new google.maps.Map(document.getElementById(ContainerId), mapOptions);
var arrJsonObject = JSON.parse(mapItems);
for (var y = 1; y <= arrJsonObject.length; y++)
{
var myLatLng1 = new google.maps.LatLng(arrJsonObject[y - 1].Latitude, arrJsonObject[y - 1].Lonngitude);
var marker = new google.maps.Marker({
position: myLatLng1,
map: mapCust,
title: 'Marked at '+ arrJsonObject[y - 1].markedDate
});
addInfoWindows(marker,y-1,arrJsonObject);
marker.setMap(mapCust);
}
}
使用下面的snnipet来调用地图
var mapItems='[
{
"Latitude": "22.575897",
"Lonngitude": "88.431754",
"CustomerCode": "*$$$*",
"CustomerName": "*@@@*",
"markedDate": "2/20/2014 12:04:41 PM"
},
{
"Latitude": "22.615067",
"Lonngitude": "88.431759",
"CustomerCode": "*$$$*",
"CustomerName": "*@@@*",
"markedDate": "2/20/2014 3:02:19 PM"
}
]';
ShowOnMap(containerId2, mapItems);