Objective-C ivar BOOL not keeping value

Question

EDIT - apologies for the typo, i was in a rush, since i had to get out of the building but hmm... might i ask, why the downvotes? just because of a few syntax errors? i'm open to being critiqued, but please be constructive?

thanks for the constructive answers, i've given both an upvote.

=============================================

I have an iVar BOOL that i wanted to use throughout this class. i tried to initialize it to YES , but the first time i read it out, it is NO . why is that? This is strange to me because my int s are all retained.

in my .mm file I have something like this:

@interface MyClass : NSObject {
    BOOL myBool;
    int myInt;
}

@end

@implementation MyClass

-(id)init{
    //...
    myInt = 3;
    myBool = YES; //here i set it
    //...
    [self addObjectsToGame];
    //...
}

-(void)addObjectsToGame{
    //...
    assert(myInt == 3);
    assert(myBool);    // <---- this line would fail
    //...
}

@end

i get that i can use a @property with assign, but why does this iVar not retain it's value??

EDIT

okay yeah, wow, something is really messed up here... i tried to replace it with @property and it's still not working. i then tried to "find all in project" for the variable myBool and i'm NOT changing it anywhere else

Note: i'm using cocos2d, but i dont think that should affect anything

Answer 1

I've fixed Objective-C syntax for you and everything works as expected

#import <Foundation/Foundation.h>

@interface MyClass : NSObject {
    BOOL myBool;
    int myInt;
}
-(void)addObjectsToGame;
@end

@implementation MyClass

-(id)init{
    if (self = [super init])
    {
        myInt = 3;
        myBool = YES; //here i set it
        [self addObjectsToGame];
    }
    return self;
}

-(void)addObjectsToGame{
    assert(myInt == 3);
    assert(myBool);
    NSLog(@"OK");
}

@end


int main(int argc, char *argv[]) {
    @autoreleasepool {
        [MyClass new];
    }
}

Answer 2

this iVar will retain it's value, as long as you don't do anything else to mess it up

#import <Foundation/Foundation.h>

@interface MyClass : NSObject {
    BOOL myBool;
    int myInt;
}
@end

@implementation MyClass

-(id)init{
    //...
    myInt = 3;
    myBool = YES; //here i set it
    //...
    [self addObjectsToGame];
    //...
    return self;
}

-(void)addObjectsToGame{
    //...
    assert(myInt == 3);
    assert(myBool);    // <---- this line would fail
    //...
    NSLog(@"didn't fail");
}

@end

This code didn't fail

Answer 3

oh wow, i'm such a noob on iOS -

all BOOL values initialize to NO (rather than random), and the reason i kept getting NO was because i had been using the BOOL right before assigning it, and also that i had made it non-atomic (though this won't matter most of the time)

this was the real reason; however, i'm going to accept someone else's answer seeing this is such a trivial mistake in the making