Question

I seek help in understanding why code behaves so strange. What I have: BaseClass : NSManagedObject and ChildClass : BaseClass

BaseClass has a category. .h:

@interface BaseClass (Category)

+ (NSArray)method;

@end

.m:

@implementation BaseClass (Category)

+ (NSArray *)method
{
    if ([self isKindOfClass:[ChildClass class]) {
        do stuff
        return resultArray;
    }
    return nil;
}

From another place in project I call *array = [ChildClass method];. In the BaseClass (Category) implementation console reads self = (Class)ChildClass, but still the execution flow skips the if and passes right to return nil; for some reason, that is beyond my understanding. Any suggestions why that may be? All answers are appreciated. Thanks.

… as I don’t have enough rep points, I’m not posting the screenshots. Hope I was clear.

Answer 1

You’re in a static method, so self represents the class itself. Is enough to do this:

if (self==[ChildClass class]) {
    do stuff
    return resultArray;
}