This new code can be used for rendering on the Main thread
while it will also work for rendering on the Map thread
before we make the switch. Needed by #2909.
Previously, the post of the turnstile event was a side effect of the
map.load event and would happen when the host app was started from a
terminated state at the first initialization of MGLMapView. The
turnstile event post was guarded with dispatch_once so that it would
only ever be sent once during the lifecycle of the application after
it started from the terminated state.
This changes that behavior by:
- Allowing a new turnstile event to be posted as much as once per
day
- Only triggering a map.view event when a map is initialized if the map
is loaded outside of the 'background' application state
- Sending a map.view event whenever a MGLMapView is instantiated
and the application did become active or enters foreground
iOS turnstile event sending behavior is now:
- A map.view event is generated whenever a map is loaded and also
when a map is shown again when the host app becomes active and moves
into the foreground
- Turnstile events are still triggered by mapviews and will be sent as
frequently as once per day for a host app that is not terminated and
also whenever a host app is terminated and restarted
w
There is now only one instance of mbgl::OfflineFileSource, created when the shared MGLOfflineStorage object is initialized. Also create and use the shared MGLOfflineStorage object when initializing an MGLMapView object. The unified cache file is located in a subdirectory of Application Support, where the SDK has control over the file’s lifetime. The subdirectory is already named after the host application’s bundle identifier, ensuring that each Mapbox-powered application has an independent tile limit. If there’s an ambient cache in a subdirectory of Caches, delete it. If there’s an offline cache in a subdirectory of Documents on iOS or Caches on OS X, move it to the unified cache location in a subdirectory of Application Support.
Fixes the iOS/OS X side of #4338.
Include offline headers in the umbrella header used by the static framework. These includes are already present in the umbrella header used by the dynamic framework. jazzy relies on the static umbrella header to include all the headers, so the offline headers were also missing from documentation.
