When annotations are removed concurrently with being updated because of a map redraw, it is possible that mbgl will still consider an annotation to exist depending on what part of the map lifecycle the call update annotations happens. However, the annotation context by tag map in MGLMapView (on the main thread) will always be up to date. This adds a guard that uses that map to avoid considering annotations that have actually been removed as visible. Another issue was that adding the same annotation object twice has always been allowed and has worked, visually. However, a recent refactor to make the reuse queue work correctly is not tolerant of the a single view representing two annotation instances that are the same. The effect is that a new UIView will be generated for each (clone) annotation that is added and only the last view will move with the map. The other views become detached and float around in the view as the map is panned. This commit adds a guard to make adding an annotation instance a no-op if it has already been added before.
Mapbox macOS SDK
A library based on Mapbox GL Native for embedding interactive map views with scalable, customizable vector maps into Cocoa applications on macOS 10.10.0 and above using Objective-C, Swift, or Interface Builder.
This SDK is analogous to the Mapbox iOS SDK, and much of the iOS SDK documentation applies here. Mapbox does not officially support the macOS SDK to the same extent as the iOS SDK; however, bug reports and pull requests are certainly welcome.