On iOS, a touch event should trigger the cell selection. This happens if the touch event has only a pair of touch_event_begin (touchesBegan) and a touch_event_end (touchesEnded) events.

However, most of the times, the OS produces a series of touchesMoved events in between, even if the location of the touch event doesn't change at all.

Whenever this happens, a drag event is fired, and this cancels the cell selection (in CellBehaviorBase).