Objective-C: Property / instance variable in category

Question

As I cannot create a synthesized property in a Category in Objective-C, I do not know how to optimize the following code:

@interface MyClass (Variant)
@prope         


        

Answer 1

Another possible solution, perhaps easier, which doesn't use Associated Objects is to declare a variable in the category implementation file as follows:

@interface UIAlertView (UIAlertViewAdditions)

- (void)setObject:(id)anObject;
- (id)object;

@end


@implementation UIAlertView (UIAlertViewAdditions)

id _object = nil;

- (id)object
{
    return _object;
}

- (void)setObject:(id)anObject
{
    _object = anObject;
}
@end

The downside of this sort of implementation is that the object doesn't function as an instance variable, but rather as a class variable. Also, property attributes can't be assigned(such as used in Associated Objects like OBJC_ASSOCIATION_RETAIN_NONATOMIC)