之前想自己做一个旅游导航的项目，在网上一搜发现了高德地图开放平台，发现原来高德可以很简单的就应用到自己的项目里面，当即我就申请了一个key来学一学，仔细研究了一下，感觉还挺难的，网上找了找案例什么的，经过这几天，小编把高德的一些基础控件差不多弄了一下，效果图如下图所示：
废话不多说，直接上源码，下面是js代码：
我要评论<script language="javascript" src="http://webapi.amap.com/maps?v=1.2&key=3c5ca12a5778fde874e9959c7fbdf516">//引入高德地图api</script>
<script language="javascript">
var mapobj;
var scale;
var maptype;
var toolbar;
var overview;
var circleeditor;
var circle;
var polygoneditor;
var polygon;
var homecontrol;
var controlui;
var ruler;
var mousetool;
//刷新页面
function reload(){
location.reload();
}
function mapinit(){
mapobj = new amap.map("icenter",{
center:new amap.lnglat(116.397728,39.90423), //地图中心点
level:13, //地图显示的比例尺级别
});
mapobj.plugin(["amap.toolbar"],function(){ //在地图中添加toolbar插件
toolbar = new amap.toolbar();
mapobj.addcontrol(toolbar);
});
mapobj.plugin(["amap.scale"],function(){ //加载比例尺插件
scale = new amap.scale();
mapobj.addcontrol(scale);
scale.show();
});
mapobj.plugin(["amap.overview"],function(){ //在地图中添加鹰眼插件
//加载鹰眼
overview = new amap.overview({
visible:true //初始化显示鹰眼
});
mapobj.addcontrol(overview);
overview.open(); //展开鹰眼
});
mapobj.plugin(["amap.rangingtool"],function(){
ruler = new amap.rangingtool(mapobj);
amap.event.addlistener(ruler,"end",function(e){
ruler.turnoff();
});
});
mapobj.plugin(["amap.mousetool"],function(){ //鼠标工具插件
mousetool = new amap.mousetool(mapobj);
});
}
function coordinate(){
amap.event.addlistener(mapobj,'click',getlnglat); //点击事件
}
function toolbarshow(){
toolbar.show();
toolbar.showruler();
toolbar.showdirection();
}
function toolbardirection(){
toolbar.show();
toolbar.showdirection();
toolbar.hideruler();
}
function toolbarlong(){
toolbar.show();
toolbar.hidedirection();
toolbar.showruler();
}
function toolbarshot(){
toolbar.show();
toolbar.hideruler();
toolbar.hidedirection();
}
function imaptype(){
mapobj.plugin(["amap.maptype"],function(){ //添加地图类型切换插件
//地图类型切换
maptype= new amap.maptype({defaulttype:1,showroad:true});
mapobj.addcontrol(maptype);
});
}
function removemaptype(){
mapobj.removecontrol(maptype);
}
function icircleeditor(){ //圆形编辑器
circle = new amap.circle({ //圆形编辑器的样式
map: mapobj,
center:new amap.lnglat("116.40332221984863","39.90025505675715"),
radius:1000,
strokecolor: "#f33",
strokeopacity: 1,
strokeweight: 3,
fillcolor: "ee2200",
fillopacity: 0.35
});
mapobj.plugin(["amap.circleeditor"],function(){
circleeditor = new amap.circleeditor(mapobj,circle); //创建圆形编辑器对象
circleeditor.open(); //打开圆形编辑器
});
}
function removecicleeditor(){ //关闭圆形编辑器，隐藏圆形
circleeditor.close();
circle.hide();
}
function iploygoneditor(){ //编辑多边形
var arr=new array();//经纬度坐标数组
arr.push(new amap.lnglat("116.403322","39.920255"));
arr.push(new amap.lnglat("116.410703","39.897555"));
arr.push(new amap.lnglat("116.402292","39.892353"));
arr.push(new amap.lnglat("116.389846","39.891365"));
polygon = new amap.polygon({
path:arr, //设置多边形轮廓的节点数组
strokecolor:"#0000ff",
strokeopacity:0.2,
strokeweight:3,
fillcolor: "#f5deb3",
fillopacity: 0.35
});
//地图上添加多边形
mapobj.addoverlays(polygon);
//构造多边形编辑对象，并开启多边形的编辑状态
mapobj.plugin(["amap.polyeditor"],function(){
polygoneditor = new amap.polyeditor(mapobj,polygon);
polygoneditor.open();
});
}
function removeploygoneditor(){
polygoneditor.close();
polygon.hide();
}
amap.homecontroldiv = function(){}
amap.homecontroldiv.prototype = {
addto: function(map, dom){
dom.appendchild(this._gethtmldom(map));
},
_gethtmldom:function(map){
this.map=map;
// 创建一个能承载控件的<div>容器
controlui = document.createelement("div");
controlui.style.width='80px'; //设置控件容器的宽度
controlui.style.height='20px'; //设置控件容器的高度
controlui.style.backgroundcolor='white';
controlui.style.borderstyle='solid';
controlui.style.borderwidth='2px';
controlui.style.cursor='pointer';
controlui.style.textalign='center';
// 设置控件的位置
controlui.style.position='absolute';
controlui.style.left='120px'; //设置控件离地图的左边界的偏移量
controlui.style.top='5px'; //设置控件离地图上边界的偏移量
controlui.style.zindex='300'; //设置控件在地图上显示
// 设置控件字体样式
controlui.style.fontfamily='arial,sens-serif';
controlui.style.fontsize='12px';
controlui.style.paddingleft='4px';
controlui.style.paddingright='4px';
controlui.innerhtml="换中心点";
// 设置控件响应点击onclick事件
controlui.onclick = function(){
map.setcenter(new amap.lnglat(116.234404, 39.12915));
}
return controlui;
}
}
amap.event.trigger(homecontroldiv,"hide");
amap.event.addlistener(homecontroldiv,"hide",function(){
controlui.style.display = 'none';
})
function mycontrol(){
homecontrol = new amap.homecontroldiv(mapobj); //新建自定义插件对象
mapobj.addcontrol(homecontrol); //地图上添加插件
}
function removemycontrol(){
homecontrol.hide();
//controlui.style.display='none';
}
function irangingtool(){
ruler.turnon();
}
function removerangingtool(){
ruler.turnoff();
mapobj.clearmap();
//ruler.hide();
//ruler.setmap(null);
//mapobj.removecontrol(ruler);
}
function imarker(){
mousetool.marker(); //使用鼠标工具，在地图上画标记点
}
function imeasurearea(){
mousetool.measurearea();
}
function irectzoomin(){
mousetool.rectzoomin();
}
function irectzoomout(){
mousetool.rectzoomout();
}
function ipolyline(){
mousetool.polyline();
}
function ipolygon(){
mousetool.polygon();
}
function icircle(){
mousetool.circle();
}
function irectangle(){
mousetool.rectangle();
}
function irule(){
mousetool.rule();
}
function removemousetool(){
mousetool.close(true);
}
function geocoder() {
var mgeocoder;
//加载地理编码插件
mapobj.plugin(["amap.geocoder"], function() {
mgeocoder = new amap.geocoder({
radius: 1000,
extensions: "all"
});
//返回地理编码结果
amap.event.addlistener(mgeocoder, "complete", geocoder_callback);
//逆地理编码
mgeocoder.getaddress(lnglatxy);
});
//加点
var marker = new amap.marker({
map:mapobj,
icon: new amap.icon({
image: "http://api.amap.com/public/images/js/mark.png",
size:new amap.size(58,30),
imageoffset: new amap.pixel(-32, -0)
}),
position: lnglatxy,
offset: new amap.pixel(-5,-30)
});
// mapobj.setfitview();
}
//回调函数
function geocoder_callback(data) {
var address;
//返回地址描述
address = data.regeocode.formattedaddress;
//返回结果拼接输出
document.getelementbyid("iaddress").innerhtml = address;
}
//鼠标点击，获取经纬度坐标
function getlnglat(e){
mapobj.clearmap();
var x = e.lnglat.getlng();
var y = e.lnglat.getlat();
document.getelementbyid("lnglat").innerhtml = x + "," + y;
lnglatxy = new amap.lnglat(x,y);
geocoder();
}
</script>下面是html代码：
<body onload="mapinit()"> <div id="icenter"></div> <div id="icontrolbox"> <ul> <li><button onclick="javascript:toolbarshow();">显示完整鱼骨</button><button onclick="javascript:toolbar.hide();">隐藏鱼骨</button><button onclick="javascript:toolbardirection();">方向盘</button><button onclick="javascript:toolbarlong();">长标尺</button><button onclick="javascript:toolbarshot();">短标尺</button></li> <li><button onclick="javascript:scale.show();">显示比例尺</button><button onclick="javascript:scale.hide();">隐藏比例尺</button></li> <li><button onclick="javascript:overview.show();">显示鹰眼</button><button onclick="javascript:overview.hide();">隐藏鹰眼</button></li> <li><button onclick="javascript:imaptype();">添加地图类型切换</button><button onclick="javascript:removemaptype();">移除地图类型切换</button></li> <li><button onclick="javascript:icircleeditor();">添加圆形编辑器</button><button onclick="javascript:removecicleeditor();">删除圆形编辑器</button></li> <li><button onclick="javascript:iploygoneditor();">添加多边形编辑器</button><button onclick="javascript:removeploygoneditor();">删除多边形编辑器</button></li> <li><button onclick="javascript:imarker();">鼠标打点工具</button><button onclick="javascript:removemousetool();">清除</button></li> <li><button onclick="javascript:ipolyline();">鼠标画折线工具</button><button onclick="javascript:removemousetool();">清除</button></li> <li><button onclick="javascript:ipolygon();">鼠标画多边形工具</button><button onclick="javascript:removemousetool();">清除</button></li> <li><button onclick="javascript:icircle();">鼠标画圆形工具</button><button onclick="javascript:removemousetool();">清除</button></li> <li><button onclick="javascript:irectangle();">鼠标画矩形工具</button><button onclick="javascript:removemousetool();">清除</button></li> <li><button onclick="javascript:irule();">鼠标测距工具</button><button onclick="javascript:removemousetool();">清除</button></li> <li><button onclick="javascript:imeasurearea();">鼠标测面积</button><button onclick="javascript:removemousetool();">移除</button></li> <li><button onclick="javascript:irectzoomin();">鼠标框选缩小</button><button onclick="javascript:irectzoomout();">鼠标框选放大</button><button onclick="javascript:removerangingtool();">关闭鼠标放大缩小</button></li> <li><button onclick="javascript:irangingtool();">测距插件</button><button onclick="javascript:removerangingtool();">隐藏测距</button></li> <li><button onclick="javascript:mycontrol();">添加自定义控件</button><button onclick="javascript:removemycontrol();">移除自定义控件</button></li> <li><div class="detail"><p><span id="lnglat"> </span></p><p><span id="iaddress"> </span></p></div></li> <li><button onclick="javascript:coordinate();">坐标拾取控件</button><button onclick="javascript:reload();">取消坐标拾取</button></li> </ul> </div> </body>
在js第一行引入高德地图api中，key值是我自己在高德地图里面创建的也可以用，你们也可以上高德开放平台自行申请key值试一试。
高德开放平台：
这里是本效果图源码下载地址，感兴趣的朋友可以直接下载
如对本文有疑问， 点击进行留言回复！！
深入理解CSS background-blend-mode的作用机制
网友评论