使用 detachPageDataLoaded 分离事件 [英] Detach event with detachPageDataLoaded

问题描述

我需要分离一个附加了以下代码的事件处理程序:

I need to detach an event handler that was attached with the following code:

var oNavController = this.getOwnerComponent().getAppComponent().getNavigationController();
this.extensionAPI.attachPageDataLoaded(this._executeTrampolin.bind(this, oNavController));

API参考:attachPageDataLoaded

这是标准代码，我不想改变它.
因此，我尝试使用以下代码从扩展中删除此事件:

This is standard code, I don't want to change it.
So I'm trying to remove this event from an extension, with the following code:

var that = this.base.getView().getController();
var oNavController = that.getOwnerComponent().getAppComponent().getNavigationController();
that.extensionAPI.detachPageDataLoaded(that._executeTrampolin.bind(that, oNavController));

但是事件并没有被分离.

But the event is not getting detached.

推荐答案

const myFn = function() {};
const myFn2 = myFn.bind(thisArg);
myFn === myFn2; // returns: false

Function.prototype.bind 创建给定函数的新副本.

bind() 方法创建一个新函数 [...].

The bind() method creates a new function [...].

即分离事件处理程序时，您必须传递与在调用 this._executeTrampolin.bind(this, oNavController) 以附加处理程序时创建的完全相同的引用.

I.e. when detaching an event handler, you'll have to pass the exact same reference that was created when this._executeTrampolin.bind(this, oNavController) was called once to attach the handler.

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