<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="https://openlayers.org/en/v5.3.0/css/ol.css" />
<script type="text/javascript" src="https://openlayers.org/en/v5.3.0/build/ol.js"></script>
<title>Document</title>
</head>
<body>
<div id="map"></div>
<script>
var beijing = ol.proj.fromLonLat([116.28, 39.54]);
var map = new ol.Map({
target: 'map',
layers: [
new ol.layer.Tile({
source: new ol.source.OSM()
})
],
view: new ol.View({
center: beijing,
zoom: 4
})
});
//实例化矢量点要素，通过矢量图层添加到地图容器中
//这样就实现了预先加载图文标注
var iconFeature = new ol.Feature({
geometry: new ol.geom.Point(beijing),
name: '北京市', //名称属性
population: 2115 //人口数（万）
});
//设置点要素样式
iconFeature.setStyle(createLabelStyle(iconFeature));
//矢量标注的数据源
var vectorSource = new ol.source.Vector({
features: [iconFeature]
});
//矢量标注图层
var vectorLayer = new ol.layer.Vector({
source: vectorSource
});
map.addLayer(vectorLayer);
//矢量标注样式设置函数，设置image为图标ol.style.Icon
function createLabelStyle(feature){
console.log(feature);
return new ol.style.Style({
// image: new ol.style.Icon({
// anchor: [0.5, 60], //锚点
// anchorOrigin:'top-right', //锚点源
// anchorXUnits: 'fraction', //锚点X值单位
// anchorYUnits: 'pixels', //锚点Y值单位
// offsetOrigin: 'top-right', //偏移原点
// opacity: 0.75,
// scale: 0.05,
// src: 'https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1594359193211&di=1d6bb819a5daa724ff65cc4d011d4d42&imgtype=0&src=http%3A%2F%2Fku.90sjimg.com%2Felement_pic%2F17%2F10%2F27%2F05dc60e54e3aa5d093cdc32611303643.jpg' //图标的URL
// }),
text: new ol.style.Text({
textAlign: 'center', //位置
textBaseline: 'middle', //基准线
font: 'normal 14px 微软雅黑', //文字样式
text: feature.get('name'), //文本内容
fill: new ol.style.Fill({ //文本填充样式（即文字颜色)
color: '#000'
}),
stroke: new ol.style.Stroke({
color: '#F00',
width: 2
})
})
});
}
map.on('click', function(evt){
var coordinate = evt.coordinate; //鼠标单击点的坐标
//新建一个要素ol.Feature
var newFeature = new ol.Feature({
geometry: new ol.geom.Point(coordinate), //几何信息
name: '标注点'
});
newFeature.setStyle(createLabelStyle(newFeature)); //设置要素样式
vectorSource.addFeature(newFeature);
});
</script>
</body>
</html>
样式使用img时（注释text部分）效果图：
样式使用text时（注释image部分）效果图：
