openlayers 3監聽地圖分辨率變化事件

map.getView().on('change:resolution',checkZoom);//checkZoom為調用的函數

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();

    }
}