openlayers 3监听地图分辨率变化事件

 map.getView().on('change:resolution',checkZoom);//checkZoom为调用的函数

 function checkZoom() {
     // alert("1");
     // var childId;
     console.log(map.getView().getZoom());
     if (map.getView().getZoom() == 11) {
         // console.log(vector.getSource().getFeatures()[0].getProperties().CODE);
         // childId = vector.getSource().getFeatures()[0].getProperties().CODE;
         // vector.setVisible(false);
         lastVectorShow();

     }
 }