[iOS] Tracking course when mode is .follow

[eimantas]

Platform: iOS
Mapbox SDK version: iOS 3.4.2

How would I go about implementing user's course tracking when the tracking mode is .follow? The MGLUserLocationAnnotationView class that I subclass does not contain the userLocation property (it is set only when the tracking mode is .followWithHeading). But regardless of the tracking mode (with exception to .none) framework could provide the direction, heading and course data on the annotation view.

The reason I need this is to display the "north-up" map view with rotating user's annotation view. I could work around this by weakly capturing the user's annotation view and setting the custom course property on it and then leaving it to the framework to call update() but that doesn't feel as a clean solution to my problem.

Any advice is much appreciated.

[friedbunny]

You should be able to access MGLUserLocationAnnotationView.userLocation.location.course in any active tracking mode. Here is how we update the user location annotation in .followWithCourse, but this should be equally applicable in other modes.

(I verified this using our custom dot example in iosapp.)

Heading is not yet available outside of .followWithHeading — enabling it in other tracking modes is planned in #5523.

[friedbunny]

Note that the addition of MGLUserTrackingMode to our macOS SDK was mistaken — it’s being made exclusive to iOS in #8141. There is not yet any concept of user location in our macOS SDK.