A control element associated with a directional pad or a thumbstick.
- iOS 7.0+
- macOS 10.9+
- tvOS 7.0+
This element does not provide values of its own. Instead, its values are provided by its child elements. It provides two sets of children that map to the same physical controls, so your app can view the directional pad as either either a pair of perpendicular axes (horizontal, vertical), or four button elements (up, down, left, right).