在Objective-c中，我如何创建所有子类都可以访问但不能公开访问的方法 [英] In Objective-c how do I make a method that's accessible by all child class, but not accessible publicly

问题描述

说我创建一个viewController.然后，我想创建另一个与第一个类似的viewController.看起来像是一项继承工作.

Say i create a viewController. Then I want to create another viewController that's like the first one. Looks like a job for inheritance.

但是，originalViewController的许多任务是私有方法，我想最小化公共接口.

However, many of the task of the originalViewController are private methods and I want to minimize public interface.

如果我将这些方法声明为公共方法，那么，实现私有事物私有化的目标就无法实现.

If I declare those methods public then well, the objective of keeping private things private is not achieved.

如果我将这些方法声明为私有，则子类将不知道这些方法.

If I declare those methods private, then the child class do not know those methods.

如果我为子类创建一个特殊的.h文件，那会很尴尬.

If I create a special .h files for the child class, it'll be awkward.

那么，做这种事情的行业标准方法是什么?

So what's the industry standard way of doing this sort of thing anyway?

在C ++中，我们将使用受保护的方法或函数来实现此权利吗?

In C++ we would use protected methods or function to accomplish this right?

更新:

我放

#import "BGGoogleMap+protected.h"

@implementation BGGoogleMap ()

@end

它不起作用.它要求输入标识符.

It doesn't work. It asks for identifier.

推荐答案

除了Catfish_Man建议的内容外，您还可以在类中创建仅子类可以访问的类别. 此处是文档要做到这一点.基本上，您只需为类创建一个新接口，然后在其中放置任何私有方法.像这样:

In addition to what Catfish_Man suggests, you can make categories on your class that only your subclasses have access to. Here are the docs for how to do that. Basically, you just create a new interface for your class and put any private methods in there. Like this:

@interface MyClass (MyClass_Private)
// Method declarations
@end

将这些内容放入Foo_Internal.h中，并将Foo_Internal.h包含在您的子类中，但不要将其公开.

Put those in Foo_Internal.h, and include Foo_Internal.h in your subclasses, but don't make it public.

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