SKSpriteNode subclass and touches events

Question

I can't understand why if I subclass a SKSpriteNode, that implements the UIResponder protocol, the methods related with touches are never been called.

For example, this is a really simple class that I'm using as test:

//INTERFACE ----------------
#import <SpriteKit/SpriteKit.h>

@interface TestClass : SKSpriteNode

@end

//IMPLEMENTATION -----------
#import "TestClass.h"

@implementation TestClass


- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
     NSLog(@"oook");
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{}

@end

If I attach an instance of this class to the scene, touching the object... nothing happens.

Am I forgetting something?

Answer 1

I've just seen that SKNode has the parameter userInteractionEnabled by default equal to NO. Just set it to YES to make the code works properly.