event-listener - 删除Cesium的相机移动事件监听器

Question

我有以下事件监听器:

  viewer.camera.moveStart.addEventListener(function(removeextra) {
     // the camera started to move
     clearoriginal();
    });
viewer.camera.moveEnd.addEventListener(function(addback) {
     // the camera stopped moving

     getresults();

});

如何删除这些事件监听器？我不知道语法。我尝试了以下方法，但它不起作用。

viewer.camera.moveStart.removeEventListener(removeextra);
      
viewer.camera.moveEnd.removeEventListener(addback);

Answer 1

我研究了Cesium，我认为你可以像这样重写它们

viewer.camera.moveStart.addEventListener(clearoriginal);
viewer.camera.moveEnd.addEventListener(getresults);

// then to remove

viewer.camera.moveStart.removeEventListener(clearoriginal);
viewer.camera.moveEnd.removeEventListener(getresults);