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1.定义一个控件类,即function
function ZoomControl(){ // 设置默认停靠位置和偏移量 this.defaultAnchor = BMAP_ANCHOR_TOP_LEFT; this.defaultOffset = new BMap.Size(10, 10); }
2.通过JavaScript的prototype属性继承于BMap.Control
ZoomControl.prototype = new BMap.Control();
3.自定义控件必须实现自己的initialize方法,并且将控件的DOM元素返回
ZoomControl.prototype.initialize = function(map){ var b1 = document.createElement("input"); b1.type = "button"; b1.value="放大1级"; b1.onclick = function(e){ map.zoomTo(map.getZoom() + 1); } var b2 = document.createElement("input"); b2.type = "button"; b2.value="缩小1级"; b2.onclick = function(e){ map.zoomTo(map.getZoom() - 1); } var div = document.createElement("div"); div.appendChild(b1); div.appendChild(b2); map.getContainer().appendChild(div); return div; }
4.创建控件, 添加到地图当中
var myZoomCtrl = new ZoomControl(); map.addControl(myZoomCtrl);
5.打开浏览器
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原文地址:http://www.cnblogs.com/TomSnail/p/4356344.html