【解决办法】注册鼠标左键单击事件:
var handler = new Cesium.ScreenSpaceEventHandler(scene.canvas);
handler.setInputAction(function (e) {
console.log(e)
}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
注销鼠标左键单击事件:
handler.removeInputAction(Cesium.ScreenSpaceEventType.LEFT_CLICK);