Objective-C :(私有/公共属性)为外部类调用设置只读属性，为自身调用设置只读属性 [英] Objective-C : (private / public properties) making a property readonly for outside class calls and readwrite for self calls

问题描述

您是否知道一种方法可以使外部调用的属性只读，内部调用的属性可读写?

Would you know a way to make a property readonly for outside calls and readwrite for inside calls ?

我以前读过一些类似的东西

I've read times ago somthing that seemed like

在.h

@property(nonatomic, readonly) NSDate* theDate;

在.m

@interface TheClassName()
@property(nonatomic, retain) NSDate* theDate;
@end

但这会在编译 .m 时引发警告TheClassName 类延续中的属性 theDate 属性与类 TheClassName 属性不匹配".

but this raises a warning when compiling the .m "Property theDate attribute in TheClassName class continuation does not match class TheClassName property".

无论如何，它似乎有效(可以从课外读取但不能设置，可以从课内进行)但我应该错过一些东西以避免警告.或者如果你知道一个更好的方法来做到这一点......

Anyway, it seems to work (can read but not set from outside the class, can do both from inside) but I should have missed somehting to avoid the warning. Or if you know a better way to do this...

推荐答案

在你的 .h 中:

@property(nonatomic, retain, readonly) NSDate* theDate;

在您的 .m 中:

@interface TheClassName()
@property(nonatomic, retain, readwrite) NSDate* theDate;
@end

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