Merge branch release-ios-v3.3.5 into master

platform/ios/CHANGELOG.md

@@ -72,6 +72,13 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT
 * MGLMapDebugOverdrawVisualizationMask no longer has any effect in Release builds of the SDK. This debug mask has been disabled for performance reasons. ([#5555](https://github.com/mapbox/mapbox-gl-native/pull/5555))
 * Fixed a typo in the documentation for the MGLCompassDirectionFormatter class. ([#5879](https://github.com/mapbox/mapbox-gl-native/pull/5879))
 
+## 3.3.5 - November 2, 2016
+
+* Speculatively fixed an OpenGL rendering crash. ([#6844](https://github.com/mapbox/mapbox-gl-native/pull/6844))
+* Fixed an issue with symbols not being properly stripped from the dynamic framework. The dSYM file included with the standard dynamic framework in previous releases (e.g., `mapbox-ios-sdk-3.3.4-dynamic.zip` or the `Mapbox-iOS-SDK` pod) could not be used to symbolicate crashes. ([#6531](https://github.com/mapbox/mapbox-gl-native/pull/6531))
+* Include simulator architecture slices in the dSYM file that is generated for release builds. ([#5740](https://github.com/mapbox/mapbox-gl-native/pull/5740))
+* Fixed a rare networking-related crash. ([#5932](https://github.com/mapbox/mapbox-gl-native/pull/5932))
+
 ## 3.3.4 - August 8, 2016
 
 * Fixed an issue that caused the user dot to be selected when tapping an annotation that lies within the user dot’s accuracy circle. First attempt was [#5816](https://github.com/mapbox/mapbox-gl-native/pull/5816) in v3.3.2, which excluded the pulsing halo but not the accuracy circle. ([#5894](https://github.com/mapbox/mapbox-gl-native/pull/5894))

platform/ios/src/MGLMapboxEvents.m

@@ -129,6 +129,7 @@ @interface MGLMapboxEvents () <MGLLocationManagerDelegate>
 
 @implementation MGLMapboxEvents {
     NSString *_instanceID;
+    UIBackgroundTaskIdentifier _backgroundTaskIdentifier;
 }
 
 + (void)initialize {
@@ -257,9 +258,20 @@ - (void)userDefaultsDidChange:(NSNotification *)notification {
 }
 
 - (void)pauseOrResumeMetricsCollectionIfRequired {
+    UIApplication *application = [UIApplication sharedApplication];
+
     // Prevent blue status bar when host app has `when in use` permission only and it is not in foreground
     if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorizedWhenInUse &&
-        [UIApplication sharedApplication].applicationState == UIApplicationStateBackground) {
+        application.applicationState == UIApplicationStateBackground) {
+
+        if (_backgroundTaskIdentifier == UIBackgroundTaskInvalid) {
+            _backgroundTaskIdentifier = [application beginBackgroundTaskWithExpirationHandler:^{
+                [application endBackgroundTask:_backgroundTaskIdentifier];
+                _backgroundTaskIdentifier = UIBackgroundTaskInvalid;
+            }];
+            [self flush];
+        }
+
         [self pauseMetricsCollection];
         return;
     }
@@ -307,7 +319,10 @@ - (void)flush {
         return;
     }
 
-    if ([self.eventQueue count] == 0) {
+    if ([self.eventQueue count] <= 1) {
+        [self.eventQueue removeAllObjects];
+        [[UIApplication sharedApplication] endBackgroundTask:_backgroundTaskIdentifier];
+        _backgroundTaskIdentifier = UIBackgroundTaskInvalid;
         return;
     }
 
@@ -485,10 +500,12 @@ - (void)postEvents:(NS_ARRAY_OF(MGLMapboxEventAttributes *) *)events {
             if (error) {
                 [strongSelf pushDebugEvent:MGLEventTypeLocalDebug withAttributes:@{MGLEventKeyLocalDebugDescription: @"Network error",
                                                                                         @"error": error}];
-                return;
+            } else {
+                [strongSelf pushDebugEvent:MGLEventTypeLocalDebug withAttributes:@{MGLEventKeyLocalDebugDescription: @"post",
+                                                                                   @"debug.eventsCount": @(events.count)}];
             }
-            [strongSelf pushDebugEvent:MGLEventTypeLocalDebug withAttributes:@{MGLEventKeyLocalDebugDescription: @"post",
-                                                                                    @"debug.eventsCount": @(events.count)}];
+            [[UIApplication sharedApplication] endBackgroundTask:_backgroundTaskIdentifier];
+            _backgroundTaskIdentifier = UIBackgroundTaskInvalid;
         }];
     });
 }