The radius of uncertainty for the location, measured in meters.
- iOS 2.0+
- macOS 10.6+
- tvOS 9.0+
- watchOS 2.0+
- Core Location
The location’s latitude and longitude identify the center of the circle, and this value indicates the radius of that circle. A negative value indicates that the latitude and longitude are invalid.
In iOS, this property is declared as
nonatomic. In macOS, it is declared as