CODEWITHSUNDEEP
iosiphoneobjective-ccocoa
BergP
BergP

Reputation: 3545

Synthesize only setter to declare mutable class

I am trying to create Mutable and Immutable classes.

There are Person protocol, Person class, and MutablePerson class.

I would like to create name property, and synthesize only getter for Person class, and setter for MutablePerson class. How can I do this?

@protocol Person <NSObject>

@property (nonatomic, readonly, copy) NSString *name;

@end

@interface Person : NSObject <Person>

@end

@interface MutablePerson : Person

@property (nonatomic, copy) NSString *name;

@end

There are errors when I try to synthesize setter in MutablePerson class. How can I synthesize only setter for property?

Upvotes: 0

Views: 93

Answers (1)

Aron C
Aron C

Reputation: 838

Based on your example, I'm not sure why you are using a protocol to determine that you name of your Person when you are using inheritance to create your MutablePerson.

I've set up a basic Person and MutablePerson object using only inheritance, and it seems to work fine:

Person.h

#import <Foundation/Foundation.h>

@interface Person : NSObject 

@property (nonatomic, strong, readonly) NSString *name;

- (id)initWithName:(NSString*)name;

@end

@interface MutablePerson : Person

@property (nonatomic, strong, readwrite) NSString *name;

@end

Person.m

#import "Person.h"

@interface Person ()

@property (nonatomic, strong, readwrite) NSString *name;

@end

@implementation Person

- (id)initWithName:(NSString *)name {
    if (self = [super init]) {
        _name = name;
    }
    return self;
}

@end

@implementation MutablePerson

@end

Let me know if this isn't the intended behavior you have in mind, and I will edit my response to help you further if I can.

EDIT: Here is the sample code I used to create an example Person and MutablePerson:

    Person *testPerson = [[Person alloc] initWithName:@"TestName"];

    MutablePerson *testMutablePerson = [[MutablePerson alloc] init];
    testMutablePerson.name = @"MutableName";

Upvotes: 1

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