touchDown A touch-down event in the control. Declarationstatic var touchDown: UIControl.Event { get } See AlsoConstantstouchDownRepeattouchDragInsidetouchDragOutsidetouchDragEntertouchDragExittouchUpInsidetouchUpOutsidetouchCancelvalueChangedmenuActionTriggeredprimaryActionTriggerededitingDidBegineditingChangededitingDidEndeditingDidEndOnExit