self.nextResponder vs super for touchesMoved - ios

Question

Here's the setup.
I have a custom UIScrollView as a subview of PrimeView.
The custom UIScrollView can be regarded as overlaid scrollview and it gets all touch events initially.
Now, when the scroll view isn't dragging, I want it to pass touch events to other responders.
Below is my code at present, but I'm not sure about the difference between self.nextResponder and super here.
I don't get why touchesBegan is passed to the superview correctly, but touchesMoved isn't passed to the superview.
-(void) touchesBegan: (NSSet *) touches withEvent: (UIEvent *) event
{
if (!self.dragging)
{
[self.nextResponder touchesBegan: touches withEvent:event];
}
[super touchesBegan: touches withEvent: event];
}
-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.nextResponder touchesBegan: touches withEvent:event]; //
[super touchesMoved:touches withEvent:event];
}

Answer 1

Apple's stance is that you should never do something like this:
[self.nextResponder touchesBegan: touches withEvent:event];
If you do this, you're going outside UIKit's own forwarding of messages up the responder chain, and the result is undefined.
Also, in your touchesMoved:withEvent:, you're sending touchesBegan:withEvent: to nextResponder, which seems suspicious.
Also, in your touchesMoved:withEvent:, you're passing on the event twice, which seems like a bad idea.
If you want to handle drags conditionally, your best bet is to use a UIPanGestureRecognizer. If the recognizer doesn't accept the event, it will be forwarded up the responder chain normally.
If you are a registered (paid) iOS developer, you should have access to the WWDC 2012 videos. I strongly recommend you watch the “Enhancing User Experience with Scroll Views” video. I won't say more about it because its contents are still under NDA.