Due to ARC, MGLOfflinePack can be deallocated at any time following its initialization. -dealloc ensures that the offline region observer is unset, but that step is asynchronous; there is no guarantee that it completes before the first status change update. In fact, the pack is deallocated before the first status change update unless it is captured outside of the MGLOfflinePackAdditionCompletionHandler. The pack nil check is unnecessary because the subsequent code would be a no-op.
Fixed a race condition that could occur if a progress update comes after a call to remove the task but before the removal is complete. Avoid synchronously setting the task’s state inside -resume and -suspend; instead, rely on the observer to set the state asynchronously.
Also categorized offline symbols for jazzy and moved styleURL from MGLOfflineRegion to MGLTilePyramidOfflineRegion, since you never know if there will be a region type not constrained by a style in the future.
Tapping on a download now pauses or resumes it. Tapping on a completed download navigates to the downloaded region and switches to the downloaded style.
Renamed SDK classes related to offline viewing to more closely match the terminology used by mbgl and the Android SDK while remaining consistent with Cocoa naming principles.
Added a new ifabric Make target for packaging up a static framework similar to the one released as 3.0.1. Place artwork and certificate assets inside Mapbox.bundle inside Mapbox.framework. Link SystemConfiguration in the umbrella header.
Distinguish between the framework bundle and the resources bundle. For the dynamic frameworks and embedded static frameworks, the two are the same; for the non-embedded static framework, the latter resides inside the former.
The core of the change is ensuring that ensureResource doesn't release Zalgo: it should be consistently async, rather than async in the case that the resource doesn't exist in the database, but sync if it does.
This ensures that status is reported in a more consistent sequence, regardless of the database state.
