A Boolean value that indicates whether spring loading is enabled for the control.
- macOS 10.10.3+
The value of this property is
true if spring loading is enabled for the control, and
false if it is not. The default is
On pressure-sensitive systems, such as systems with the Force Touch trackpad, spring loading is a feature that allows a user to activate a segment in a segmented control by dragging selected items over it and force clicking—pressing harder—without dropping the selected items. The user can then continue dragging the items, possibly to perform additional actions.
A practical example of this feature can be found in the Calendar app. A selected calendar event can be dragged over the day, week, month, or year segments in the toolbar. Force clicking on a segment switches the calendar view without releasing the selected calendar event. The calendar event can then be dropped at the desired location in the new calendar view.
When spring loading is enabled on a segmented control and a user drags something over a segment, the segment highlights to indicate that it responds to force clicking. In this situation, if the user presses harder, additional highlighting occurs to indicate that the segment was activated.
On systems that don’t support pressure sensitivity, simply hovering over the segment for a short period of time is sufficient to activate the segment.