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?
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.
Use
@interface aVCofMine : UIViewController{
int *myArray;
}
Then, in your implementation code, in order to actually allocate the memory for your array:
myArray = malloc(sizeof(int) * numberOfElements);
And remember to free it free(myArray);
int *myArrayIt'll be up to you to allocate the memory formyArray.