如何在iOS中将readonly属性设为可读写？

Question

I have a scenario like this,

@interface ClassA:UIView
@property(readonly,strong)UIView *aView;
@end

I have another class

@interface ClassB:NSObject
@property(readonly)ClassA *aObj;
@end

How can I access the view properties in ClassA like setHidden etc....using ClassB property

eg:

In another class ClassC.m ,

import ClassB.h
@implementation ClassC
//
 ClassB *bObj;
bObj.aObj.aView.hidden = YES;

(Note :I do not want to modify/add anything in .m for ClassA and ClassB)

I want to know if this can be achieved by writing any category methods for ClassA.

Answer 1

I understand you want to change the properties of the object, not the variable that is pointing to it. Thus the title is misleading, and you can change the object already. Nothing prevents you from calling methods on any object. If you want object immutability in Objective-C you have to code it inside the object for it to work.