CAShapeLayer hitTest touch

Question

I can't understand why a CAShapeLayer does not respond to hitTest

This function always goes to // touches is outside

How do I detect a touch on a CAShapeLayer?

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{   

    currentPoint = [[touches anyObject] locationInView:self];

    for (CAShapeLayer *layer in self.layer.sublayers) {    

        if(layer == shapeLayer) {

            if([layer hitTest:currentPoint])
            {
                // touche is on the layer
            }
            else {
                // touche is outside
            }

        }

    }       

}

Answer 1

After banging my head for two days I was able to produce this bizarre code and looks like it is working!

The goal was to hit test CAShapeLayer. The CAShapeLayer is moving on the screen, so the shape is not in constant place. Hittesting the CGPath currentPoint is not straightforward.

Feel free to add any input...

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{   

    CGPoint p = [[touches anyObject] locationInView:self];

    CGAffineTransform transf = CGAffineTransformMakeTranslation(-shapeLayer.position.x, -shapeLayer.position.y); 

    if(CGPathContainsPoint(shapeLayer.path, &transf, p, NO)){    

       // the touch is inside the shape  
    }   

}