Generalization

ObjCGeneralization_ClassA

#import <Foundation/Foundation.h>

@interface ObjCGeneralization_ClassA : NSObject
- (void)doAction;
@end

@implementation ObjCGeneralization_ClassA
- (void)doAction {
    NSLog(@"Do action A");
}
@end

ObjCGeneralization_ClassB

#import "ObjCGeneralization_ClassA.h"

@interface ObjCGeneralization_ClassB : ObjCGeneralization_ClassA

@end

@implementation ObjCGeneralization_ClassB
- (void)doAction {
    [super doAction];
    NSLog(@"Do action B");
}
@end