Question

I’m attempting to define a C int array as an instance variable in my class interface so that it can be accessed by any method in the class.

I tired writing

@interface aVCofMine : UIViewController{
   int[] myArray;
}

and

@interface aVCofMine : UIViewController{
   int myArray[];
}

but to no avail.

Is it actually possible to define a C array [instead of a NSArray] as an instance variable in the class interface?

Answer 1

C arrays need to be either dynamically allocated or fixed-size. So you can do:

@interface AVCOfMine : NSViewController {
    int myArray[5];
}
@end

or you can do

@interface AVCOfMine : NSViewController {
    int *myArray;
}
@end

@implementation AVCOfMine

- (void)viewDidLoad {
    myArray = malloc(sizeof(int) * 5);
}

- (void)dealloc {
    free(myArray);
    [super dealloc]; // include this line only if not using ARC
}
@end

The former forces the array to always be of the same size. The latter allows you to choose the size at runtime, but is obviously a bit more complex. Which is better depends on the situation.