Switch between gestures on a view with same touch

Question

In UICollectionView I added UIPanGestureRecognizer. At first UIPanGestureRecognizer is disabled, I want to enable it when contentOffset.y of UICollectionView reaches some value during scrolling. I am trying to achieve this by following code. But it works only in second touch on the screen. I want to work with gesture when contentOffset.y is 44 without taking off the finger.

 func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldReceive touch: UITouch) -> Bool {
    if collectionView.contentOffset.y == CGFloat(44) {
        return false
    }
    return true
}

Answer 1

Yes. According to your logic it happens only on second touch. Try to enable or disable pan gesture in scrollView Delegate method like below.

func scrollViewDidScroll(scrollView: UIScrollView) {
     if collectionView.contentOffset.y < CGFloat(44) {
        panGesture.enabled = false
    }
    panGesture.enabled = true
}

Answer 2

In your gesture's began state check the condition

 func gestureTap(sender : UIGestureRecognizer){        
   if sender.state == .began {
       if collectionView.contentOffset.y == CGFloat(44) {

       } else {
         return
       }
    }
}

Or

In scrollView Delegate method you can check too. Check below

func scrollViewDidScroll(scrollView: UIScrollView) {
     if collectionView.contentOffset.y < CGFloat(44) {
        yourGesture.enabled = false
    } else {
    yourGesture.enabled = true
   }
}