可以重写类别方法吗?的iOS [英] Can category methods be overridden? IOS

问题描述

我正在尝试计划如何向某些对象的所有实例添加几个方法.我认为将类别添加到父对象(UIViewController)可以满足我的要求，但是我可以覆盖以这种方式添加的方法吗?大多数时候，子类将使用默认方法，但是我知道我将需要至少重写一次该方法.

I am trying to plan how to add a couple methods to all instances of certain objects. I think adding a category to the parent object(UIViewController) would work for what I want to do, but can I override a method added this way? Most of the time the subclasses will use the default methods but I do know I will need to override the method at least once.

我还想考虑其他什么方法?

Also what other methods should I consider for what I am trying to do?

我想做的事的例子:

我有一组类似于期刊页面的对象.这些页面是UIViewControllers的子类.我想添加用于加载，保存和类似方法.在日记类(NSObject的子类)中，我有一个数组，用于存储每个日记页面的实例.我想要它，因此我可以从数组中选择一个页面并在方法上运行，而不必知道特定的对象类，因为它们都应该具有方法.

I have a set of Objects that act like pages of a journal. These pages are subclasses of UIViewControllers. I want to add methods for loading, saving, and similar. In a journal class(Subclass of NSObject) I have an array storing instances of each Journal page. I want it so I can select a page from the array and run on of the methods without having to know the specific object class as they all should have the methods.

推荐答案

简短的回答:是的，可以.出于继承的目的，将超类上的方法与实际在超类中定义的方法一样对待，并且可以用相同的方式覆盖.

Short answer: yes, you can. For purposes of inheritance category methods on a superclass are treated like methods that are actually defined in the superclass, and can be overridden in the same way.

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