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What are the javascript functions used by Baidu Maps?

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2023-05-13 11:40:061551browse

Javascript development of Baidu map js functions used to organize

   //创建和初始化地图函数: 
    
    function initMap(){ 
     createMap();//创建地图 
     setMapEvent();//设置地图事件 
     addMapControl();//向地图添加控件 
     addMarker();//向地图中添加marker 
    } 
     
    //创建地图函数: 
    function createMap(){ 
     var map = new BMap.Map("container");//在百度地图容器中创建一个地图 
     var point = new BMap.Point(116.395645,39.929986);//定义一个中心点坐标 
     map.centerAndZoom(point,12);//设定地图的中心点和坐标并将地图显示在地图容器中 
     window.map = map;//将map变量存储在全局 
    } 
     
    //地图事件设置函数: 
    function setMapEvent(){ 
     map.enableDragging();//启用地图拖拽事件,默认启用(可不写) 
     map.enableScrollWheelZoom();//启用地图滚轮放大缩小 
     map.enableDoubleClickZoom();//启用鼠标双击放大,默认启用(可不写) 
     map.enableKeyboard();//启用键盘上下左右键移动地图 
    } 
  
    //地图控件添加函数: 
    function addMapControl(){ 
      //向地图中添加缩放控件 
     var ctrl_nav = new BMap.NavigationControl({anchor:BMAP_ANCHOR_TOP_LEFT,type:BMAP_NAVIGATION_CONTROL_LARGE}); 
     map.addControl(ctrl_nav); 
      //向地图中添加缩略图控件 
     var ctrl_ove = new BMap.OverviewMapControl({anchor:BMAP_ANCHOR_BOTTOM_RIGHT,isOpen:1}); 
     map.addControl(ctrl_ove); 
      //向地图中添加比例尺控件 
     var ctrl_sca = new BMap.ScaleControl({anchor:BMAP_ANCHOR_BOTTOM_LEFT}); 
     map.addControl(ctrl_sca); 
    } 
     
    //标注点数组 
    var markerArr = [{title:"我的标记",content:"我的备注",point:"116.354539|39.970253",isOpen:0,icon:{w:21,h:21,l:0,t:0,x:6,lb:5}} 
      ]; 
    //创建marker 
    function addMarker(){ 
     for(var i=0;i<markerArr.length;i++){ 
      var json = markerArr[i]; 
      var p0 = json.point.split("|")[0]; 
      var p1 = json.point.split("|")[1]; 
      var point = new BMap.Point(p0,p1); 
      var iconImg = createIcon(json.icon); 
      var marker = new BMap.Marker(point,{icon:iconImg}); 
      var iw = createInfoWindow(i); 
      var label = new BMap.Label(json.title,{"offset":new BMap.Size(json.icon.lb-json.icon.x+10,-20)}); 
      marker.setLabel(label); 
       
      map.addOverlay(marker); 
      label.setStyle({ 
         borderColor:"#808080", 
         color:"#333", 
         cursor:"pointer" 
      }); 
      (function(){ 
       var index = i; 
       var _iw = createInfoWindow(i); 
       var _marker = marker; 
       _marker.addEventListener("click",function(){ 
        this.openInfoWindow(_iw); 
       }); 
       _iw.addEventListener("open",function(){ 
        _marker.getLabel().hide(); 
       }) 
       _iw.addEventListener("close",function(){ 
        _marker.getLabel().show(); 
       }) 
       label.addEventListener("click",function(){ 
        _marker.openInfoWindow(_iw); 
       }) 
       if(!!json.isOpen){ 
        label.hide(); 
        _marker.openInfoWindow(_iw); 
       } 
      })() 
     } 
    } 
    //创建InfoWindow 
    function createInfoWindow(i){ 
     var json = markerArr[i]; 
     var iw = new BMap.InfoWindow("<b class=&#39;iw_poi_title&#39; title=&#39;" + json.title + "&#39;>" + json.title + "</b><div class=&#39;iw_poi_content&#39;>"+json.content+"</div>"); 
     return iw; 
    } 
    //创建一个Icon 
    function createIcon(json){ 
     var icon = new BMap.Icon("http://openapi.baidu.com/map/images/us_mk_icon.png", new BMap.Size(json.w,json.h),{imageOffset: new BMap.Size(-json.l,-json.t),infoWindowOffset:new BMap.Size(json.lb+5,1),offset:new BMap.Size(json.x,json.h)}) 
     return icon; 
    } 
     
 initMap();//创建和初始化地图

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