If this Application uses tabbed navigation groups, this mapping is updated whenever the changeTab method is called.
Reports the active tab for each group, with a value of null indicating no tab is active.
Subclasses may override this property to define default tabs for each group.
If this Application uses tabbed navigation groups, this mapping is updated whenever the changeTab method is called. Reports the active tab for each group, with a value of
nullindicating no tab is active. Subclasses may override this property to define default tabs for each group.