selectedSegmentIndex
The index number that identifies the selected segment that the user last touched.
Declaration
var selectedSegmentIndex: Int { get set }Discussion
The default value is noSegment (no segment selected) until the user touches a segment. Set this property to -1 to turn off the current selection. UISegmentedControl ignores this property when isMomentary is true. When the user touches a segment to change the selection, the system generates the control event valueChanged. If you set up the segmented control to respond to this control event, it sends an action message to its target.