Instance variable 'variable' accessed in class method error

Question

I have a variable declared in the header file :

@interface

int _nPerfectSlides;

and

@property (nonatomic, readwri         


        

Answer 1

I know this is old, but it still comes up. Try making it a static. Here's I'm altering the code a bit to make it increment.

// Hit.h

#import 
@interface Hit : NSObject
+ (void)hit;
@end

// Hit.m

#import "Hit.h"
@implementation Hit
static int val = 0;
+ (void)hit {
    val += 1;
    [self showHit];
}
+ (void)showHit {
    NSLog(@"hit value: %d", val);
}
@end

//main.m

#import 
#import "Hit.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        [Hit hit];
        [Hit hit];
        [Hit hit];
    }
    return 0;
}