Drag Threshold doesn't seem to work for mobile

I'm setting up a standard mobile joystick UI. Left joystick moves the character and right joystick looks around. I lowered in the Drag Threshold in the UI event system to 1 (from the default of 5) so a drag begins right away as opposed to waiting for 5 pixels to be dragged. When testing with mouse in the editor, this works fine. With a mobile build (android), a certain drag threshold is still there.

Any ideas as to why?

PS. Once a drag is started, the accuracy is seems to be ok, it's just that initial drag still awaits a few pixels before being applied (this causes a small jump in movement).

Thanks!

 

This is a very serious problem! Hope anyone can solve it.

 

I agree. Drag threshold works fine in the editor and has no effect on Android.
Will look at raising an issue.

 

@tinman

Well, I'm not sure if I've had to counter this issue, can't remember but there is at least this:

EventSystem.pixelDragThreshold

I think I haven't used it, but maybe it's helpful in your case can you try and see if it helps?

 

Agree. In my case, Drag threshold works fine in the Editor but it has no effect on iOS (Unity 2018.3, iOS 11). Do anyone know how to solve this problem?