Adjusts the aspect ratio of the specified region to ensure that it fits in the map view’s frame.
- iOS 3.0+
- macOS 10.9+
- tvOS 9.2+
The initial region whose span you want to adjust.
A region that is still centered on the same point of the map but whose span values are adjusted to fit in the map view’s frame.
You can use this method to normalize the region values before displaying them in the map. This method returns a new region that both contains the specified region and fits neatly inside the map view’s frame.