why is there a delay when moving object using UIPanGestureRecognizer

Question

I\'m moving UIView object using UIPanGestureRecognizer - how much I drag my finger on screen, that much I move the view in the same direction (only in X - left or right, Y is no

Answer 1

The GestureRecognizer can't be sure, if it is a pan gesture, before you moved your finger some pixels. I don't know the exact tolerance value, but that is why you feel a delay.

Documentation:

A panning gesture is continuous. It begins when the minimum number of fingers allowed have moved enough to be considered a pan.

If you want instant movement, you probably need to build your own logic using touchesMoved:.

Another approach could be, to animate to the first recognized point. But that doesn't remove the delay. For that approach you could have a look at my JDDroppableView on github.