The largest boundary distance that can be assigned to a region.
- iOS 4.0+
- macOS 10.8+
- UIKit for Mac 13.0+Beta
- Core Location
This property defines the largest boundary distance allowed from a region’s center point. Attempting to monitor a region with a distance larger than this value causes the location manager to send a
CLError error to the delegate.
If region monitoring is unavailable or not supported, the value in this property is