公开只读但具有私有 setter 的 Objective-C 属性 [英] Objective-C property that is readonly publicly, but has a private setter

问题描述

我想使用 @property 语法来声明一个公开只读但有一个可以从类中私下调用的 setter 的合成属性.

I'd like to use the @property syntax to declare a synthesized property that is publicly readonly but has a setter that can be called privately from within the class.

由于它是 Objective-C，这基本上意味着 setFoo: 方法将被合成，但在类本身之外调用它会导致警告(无法识别的选择器).要触发警告，我必须声明属性 readonly;有什么方法可以强制使用仅在类中可用的合成 setter?

Since it's Objective-C, this basically means that the setFoo: method would be synthesized, but calling it outside of the class itself would result in a warning (unrecognized selector). To trigger the warning I have to declare the property readonly; is there any way to force a synthesized setter that is only available within the class?

推荐答案

我认为您正在寻找的称为类扩展.您将在标头中将该属性声明为只读:

I think what you're looking for are called class extensions. You would declare the property read-only in the header:

@interface MyClass : NSObject {
}

@property (readonly, assign) NSInteger myInteger;

@end

然后在实现文件中的类扩展中重新声明:

Then redeclare in your class extension in the implementation file:

@interface MyClass ()

@property (readwrite, assign) NSInteger myInteger;

@end


@implementation MyClass

@end

有关更多信息，请查看 Apple 的 文档

For more check out Apple's documentation

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