//js代码    
        btn:function(){
    var that=this
    var latitude=this.data.markers[0].latitude
    var longitude=this.data.markers[0].longitude
    wx.request({
      url: 'https://api.jisuapi.com/illegaladdr/coord?appkey='+app.globalData.appkey,
      data:{
        lat:latitude,
        lng:longitude,  
        range:3000,
        num:10
      },
      success:function(res){
        console.log(res)
        var result=res.data.result;
        for(var i=0;ilet lat=result[i].lat;
          let lng=result[i].lng;
          var index="markers["+(i+1)+"]";
          let lat0=that.data.markers[0].latitude;
          let lng0=that.data.markers[0].longitude;
          //计算两点之间的距离
          var dis=Math.floor(comm.GetDistance(lng0,lat0,lng,lat));
          //计算第二个点相对于第一个点的方向
          var dir=comm.getDirection(lat0,lng0,lat,lng);
          that.setData({
            [index]:{
              latitude:lat,
              longitude:lng,
              iconPath:"/images/weizhi(3).png",
              width:30,
              height:30,
              callout:{
                content:"距离为："+dir+dis+"米",
                color:'black',
                fontSize:13,
                borderRadius:5,
                borderWidth:1,
                borderColor:'blue',
                padding:2,
                display:'BYCLICK'
              }
            }
          }) 
        }
      }
    }) 
  },

       //WXML代码
   class="mymap" latitude="{{markers[0].latitude}}" longitude="{{markers[0].longitude}}" markers="{{markers}}">
  <image src="/images/location.png" class="loaction" bindtap="controltap">image>
  <button bindtap="btn" id="clickbtn" plain>点击查看button>
map>