原文:【百度地图API】你看过房产地图吗？你知道房产标注是如何建立的吗？
你是不是看过很多房产网站？例如安居客，新浪乐居。
你是不是也想做一个能写文字的标注？
你知道怎么去实现麼?
其实，上图这样的标注是一个“自定义覆盖物”。你可以任意指定它的样式，文字，图片等等。
首先，我需要初始化地图：
var mp = new BMap.Map("map_container");var point = new BMap.Point(116.3964,39.9093);mp.centerAndZoom(point,);
然后，我建立两个自定义覆盖物：
var myCompOverlay = new ComplexCustomOverlay(new BMap.Point(116.407845,39.914101), "*东");var myCompOverlay2 = new ComplexCustomOverlay(new BMap.Point(116.406946,39.911403), "国家博物馆");
对自定义覆盖物定义：（包括样式、图片、位置偏移等等）
// 复杂的自定义覆盖物 function ComplexCustomOverlay(point, text){ this._point = point; this._text = text; } ComplexCustomOverlay.prototype = new BMap.Overlay(); ComplexCustomOverlay.prototype.initialize = function(map){ this._map = map; var div = this._div = document.createElement("div"); div.style.position = "absolute"; div.style.zIndex = BMap.Overlay.getZIndex(this._point.lat); div.style.backgroundColor = "#EE5D5B"; div.style.border = "1px solid #BC3B3A"; div.style.color = "white"; div.style.height = "18px"; div.style.padding = "2px"; div.style.lineHeight = "18px"; div.style.whiteSpace = "nowrap"; div.style.MozUserSelect = "none"; div.style.fontSize = "12px" div.appendChild(document.createTextNode(this._text)); var arrow = this._arrow = document.createElement("div"); arrow.style.background = "url(http://map.baidu.com/fwmap/upload/r/map/fwmap/static/house/images/label.png) no-repeat"; arrow.style.position = "absolute"; arrow.style.width = "11px"; arrow.style.height = "10px"; arrow.style.top = "22px"; arrow.style.left = "10px"; arrow.style.overflow = "hidden"; div.appendChild(arrow); div.onmouseover = function(){ this.style.backgroundColor = "#6BADCA"; this.style.borderColor = "#0000ff"; arrow.style.backgroundPosition = "0px -20px"; } div.onmouseout = function(){ this.style.backgroundColor = "#EE5D5B"; this.style.borderColor = "#BC3B3A"; arrow.style.backgroundPosition = "0px 0px"; } mp.getPanes().labelPane.appendChild(div); return div; } ComplexCustomOverlay.prototype.draw = function(){ var map = this._map; var pixel = map.pointToOverlayPixel(this._point); this._div.style.left = pixel.x - parseInt(this._arrow.style.left) + "px"; this._div.style.top = pixel.y - + "px"; }
最后，在地图上把它们添加上来。
mp.addOverlay(myCompOverlay);mp.addOverlay(myCompOverlay2);
运行示例，请点击：