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();

     }

 }