Open Radar

 
Area:
MapKit

Summary:
Two related issues: 

MKMapContainsRect incorrectly returns false when the containing rect spans the 180th meridian and the contained rect lies completely within the eastern hemisphere and the containing rect.  This scenario works correctly for a similar rect in the western hemisphere.

MKMapRectUnion generates an incorrect rect when joining a rect spanning the 180th meridian and a rect fully contained by the eastern hemisphere.

Steps to Reproduce:
MKMapRectContains issue
- Create a rect MKMapRect spanning the 180th meridian. (spanningRect)
- Create a rect within the spanningRect but also only within the eastern hemisphere. (containedRect)
- Execute a let contains = MKMapRectContains(spanningRect, containedRect)
MKMapRectUnion issue
- Execute a let union = MKMapUnion(spanningRect, containedRect)

Expected Results:
MKMapRectContains issue
- Result should be true
MKMapUnion issue
- Result should be spanningRect

Observed Results:
MKMapRectContains issue
- Result will be false
MKMapUnion issue
- Result will be rect with correct latitude bounds, but longitude that completely spans around the globe

Version:
Observed on Xcode 8.3 playground/app and Xcode 9b4 playground.