Objective C bool property and memory

Question

How do I add a public boolean property to my Location model? Example: location.has_lights = YES;

I don't quite understand why I need to retain NSString but the IDE shows me an error when trying to retain a bool.

This code produces a 'EXC_BAD_ACCESS'

RKLocation.h

#import <RestKit/RestKit.h>
@interface RKLocation : RKObject {
    NSString *_name;
    bool has_lights;
}
@property (nonatomic , retain) NSString *name;
@property (nonatomic) bool has_lights;
@end

RKLocation.m

#import "RKLocation.h"
@implementation RKLocation
@synthesize name = _name;
@synthesize has_lights;
- (void)dealloc {
    [_name release];
    [super dealloc];
}
@end

score 4 · Answer 1 · answered Jun 14 '11 at 14:15

4

A bool is not an object type, it is a scalar, so you don't retain / release it.

answered Jun 14 '11 at 14:15

Simon Lee

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score 2 · Accepted Answer · edited May 23 '17 at 12:12

2

Try using BOOL instead of bool.

Also this question that was asked just a few minutes ago might be of help: Objective-c dealloc of boolean value

edited May 23 '17 at 12:12

Community

1
1

answered Jun 14 '11 at 14:17

Matt.M

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score 1 · Answer 3 · answered Jun 14 '11 at 14:16

An NSString is an object. It's stored on the Heap.

A Boolean is not an object but a scalar data type customarily stored on the Stack. You don't need to retain it.

Retaining in objectiveC tells the runtime "the object that pointer points to is still needed, don't remove it yet".

Objective C bool property and memory

3 Answers3