Question

Noob question here.

If I have Class A with an array float itemsPosition[20][20] and I have another class B to access that, how can I do it?

What I usually do it to alloc Class A and access for other objects but in this case, I can’t synthesize float array within Class A.

Any ideas?

Answer 1

You can @synthesize an NSValue that holds a pointer to your array.

@interface SomeObject : NSObject
@property (strong, nonatomic) NSValue *itemsPosition;
@end

@implementation SomeObject
@synthesize itemsPosition;
...
static float anArray[20][20];
...
- (void) someMethod
{
    ... add items to the array
    [self setItemsPosition:[NSValue valueWithPointer:anArray]];
}
@end

@implementation SomeOtherObject
...
- (void) someOtherMethod
{
    SomeObject *obj = [[SomeObject alloc] init];
    ...
    float (*ary2)[20] = (float(*)[20])[obj.itemsPosition pointerValue];
    ...
}