Merge branch 'master' into rclee-async-setupupstream/rclee-async-setup

13 files changed, 144 insertions, 130 deletions

diff --git a/platform/ios/src/MGLAnnotationContainerView.h b/platform/ios/src/MGLAnnotationContainerView.h
index 90d2964831..ccec3052a6 100644
--- a/platform/ios/src/MGLAnnotationContainerView.h
+++ b/platform/ios/src/MGLAnnotationContainerView.h
@@ -10,7 +10,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 + (instancetype)annotationContainerViewWithAnnotationContainerView:(MGLAnnotationContainerView *)annotationContainerView;
 
-- (void)addSubviews:(NS_ARRAY_OF(MGLAnnotationView *) *)subviews;
+- (void)addSubviews:(NSArray<MGLAnnotationView *> *)subviews;
 
 @end
 
diff --git a/platform/ios/src/MGLAnnotationContainerView.m b/platform/ios/src/MGLAnnotationContainerView.m
index 9a823c839c..6c82a1836d 100644
--- a/platform/ios/src/MGLAnnotationContainerView.m
+++ b/platform/ios/src/MGLAnnotationContainerView.m
@@ -3,7 +3,7 @@
 
 @interface MGLAnnotationContainerView ()
 
-@property (nonatomic) NS_MUTABLE_ARRAY_OF(MGLAnnotationView *) *annotationViews;
+@property (nonatomic) NSMutableArray<MGLAnnotationView *> *annotationViews;
 
 @end
 
@@ -26,7 +26,7 @@
     return newAnnotationContainerView;
 }
 
-- (void)addSubviews:(NS_ARRAY_OF(MGLAnnotationView *) *)subviews
+- (void)addSubviews:(NSArray<MGLAnnotationView *> *)subviews
 {
     for (MGLAnnotationView *view in subviews)
     {
diff --git a/platform/ios/src/MGLAnnotationContainerView_Private.h b/platform/ios/src/MGLAnnotationContainerView_Private.h
index 007b03550b..9dce54842d 100644
--- a/platform/ios/src/MGLAnnotationContainerView_Private.h
+++ b/platform/ios/src/MGLAnnotationContainerView_Private.h
@@ -7,7 +7,7 @@ NS_ASSUME_NONNULL_BEGIN
 
 @interface MGLAnnotationContainerView (Private)
 
-@property (nonatomic) NS_MUTABLE_ARRAY_OF(MGLAnnotationView *) *annotationViews;
+@property (nonatomic) NSMutableArray<MGLAnnotationView *> *annotationViews;
 
 @end
 
diff --git a/platform/ios/src/MGLAnnotationView.mm b/platform/ios/src/MGLAnnotationView.mm
index 1c53ba507a..46b0f56a79 100644
--- a/platform/ios/src/MGLAnnotationView.mm
+++ b/platform/ios/src/MGLAnnotationView.mm
@@ -11,8 +11,9 @@
 
 @property (nonatomic, readwrite, nullable) NSString *reuseIdentifier;
 @property (nonatomic, readwrite) CATransform3D lastAppliedScaleTransform;
-@property (nonatomic, readwrite) CATransform3D lastAppliedRotateTransform;
 @property (nonatomic, readwrite) CGFloat lastPitch;
+@property (nonatomic, readwrite) CATransform3D lastAppliedRotationTransform;
+@property (nonatomic, readwrite) CGFloat lastDirection;
 @property (nonatomic, weak) UIPanGestureRecognizer *panGestureRecognizer;
 @property (nonatomic, weak) UILongPressGestureRecognizer *longPressRecognizer;
 @property (nonatomic, weak) MGLMapView *mapView;
@@ -43,9 +44,9 @@
 
 - (void)commonInitWithAnnotation:(nullable id<MGLAnnotation>)annotation reuseIdentifier:(nullable NSString *)reuseIdentifier {
     _lastAppliedScaleTransform = CATransform3DIdentity;
+    _lastAppliedRotationTransform = CATransform3DIdentity;
     _annotation = annotation;
     _reuseIdentifier = [reuseIdentifier copy];
-    _scalesWithViewingDistance = NO;
     _enabled = YES;
 }
 
@@ -159,7 +160,7 @@
 
         // We keep track of each viewing distance scale transform that we apply. Each iteration,
         // we can account for it so that we don't get cumulative scaling every time we move.
-        // We also avoid clobbering any existing transform passed in by the client, too.
+        // We also avoid clobbering any existing transform passed in by the client or this SDK.
         CATransform3D undoOfLastScaleTransform = CATransform3DInvert(_lastAppliedScaleTransform);
         CATransform3D newScaleTransform = CATransform3DMakeScale(pitchAdjustedScale, pitchAdjustedScale, 1);
         CATransform3D effectiveTransform = CATransform3DConcat(undoOfLastScaleTransform, newScaleTransform);
@@ -181,11 +182,20 @@
 {
     if (self.rotatesToMatchCamera == NO) return;
 
-    CGFloat directionRad = self.mapView.direction * M_PI / 180.0;
-    CATransform3D newRotateTransform = CATransform3DMakeRotation(-directionRad, 0, 0, 1);
-    self.layer.transform = CATransform3DConcat(CATransform3DIdentity, newRotateTransform);
-    
-    _lastAppliedRotateTransform = newRotateTransform;
+    CGFloat direction = -MGLRadiansFromDegrees(self.mapView.direction);
+
+    // Return early if the map view has the same rotation as the already-applied transform.
+    if (direction == _lastDirection) return;
+    _lastDirection = direction;
+
+    // We keep track of each rotation transform that we apply. Each iteration,
+    // we can account for it so that we don't get cumulative rotation every time we move.
+    // We also avoid clobbering any existing transform passed in by the client or this SDK.
+    CATransform3D undoOfLastRotationTransform = CATransform3DInvert(_lastAppliedRotationTransform);
+    CATransform3D newRotationTransform = CATransform3DMakeRotation(direction, 0, 0, 1);
+    CATransform3D effectiveTransform = CATransform3DConcat(undoOfLastRotationTransform, newRotationTransform);
+    self.layer.transform = CATransform3DConcat(self.layer.transform, effectiveTransform);
+    _lastAppliedRotationTransform = newRotationTransform;
 }
 
 #pragma mark - Draggable
diff --git a/platform/ios/src/MGLCameraChangeReason.h b/platform/ios/src/MGLCameraChangeReason.h
index 6c6b3636ba..f439d3e7ea 100644
--- a/platform/ios/src/MGLCameraChangeReason.h
+++ b/platform/ios/src/MGLCameraChangeReason.h
@@ -57,5 +57,9 @@ typedef NS_OPTIONS(NSUInteger, MGLCameraChangeReason)
     MGLCameraChangeReasonGestureOneFingerZoom = 1 << 7,
 
     // :nodoc: The user panned with two fingers to tilt the map (two finger drag).
-    MGLCameraChangeReasonGestureTilt = 1 << 8
+    MGLCameraChangeReasonGestureTilt = 1 << 8,
+
+    // :nodoc: Cancelled
+    MGLCameraChangeReasonTransitionCancelled = 1 << 16
+
 };
diff --git a/platform/ios/src/MGLMapAccessibilityElement.mm b/platform/ios/src/MGLMapAccessibilityElement.mm
index 8bce38a145..c1cc5304d7 100644
--- a/platform/ios/src/MGLMapAccessibilityElement.mm
+++ b/platform/ios/src/MGLMapAccessibilityElement.mm
@@ -56,10 +56,8 @@
         // may be in the local language, which may be written in another script.
         // Attempt to transform to the script of the preferred language, keeping
         // the original string if no transform exists or if transformation fails.
-        if (@available(iOS 9.0, *)) {
-            NSString *dominantScript = [NSOrthography mgl_dominantScriptForMapboxStreetsLanguage:languageCode];
-            name = [name mgl_stringByTransliteratingIntoScript:dominantScript];
-        }
+        NSString *dominantScript = [NSOrthography mgl_dominantScriptForMapboxStreetsLanguage:languageCode];
+        name = [name mgl_stringByTransliteratingIntoScript:dominantScript];
 
         self.accessibilityLabel = name;
     }
diff --git a/platform/ios/src/MGLMapView.h b/platform/ios/src/MGLMapView.h
index 020dc5e830..fd0ca19b26 100644
--- a/platform/ios/src/MGLMapView.h
+++ b/platform/ios/src/MGLMapView.h
@@ -189,7 +189,7 @@ MGL_EXPORT IB_DESIGNABLE
  */
 @property (nonatomic, readonly, nullable) MGLStyle *style;
 
-@property (nonatomic, readonly) NS_ARRAY_OF(NSURL *) *bundledStyleURLs __attribute__((unavailable("Call the relevant class method of MGLStyle for the URL of a particular default style.")));
+@property (nonatomic, readonly) NSArray<NSURL *> *bundledStyleURLs __attribute__((unavailable("Call the relevant class method of MGLStyle for the URL of a particular default style.")));
 
 /**
  URL of the style currently displayed in the receiver.
@@ -286,7 +286,7 @@ MGL_EXPORT IB_DESIGNABLE
  */
 - (IBAction)showAttribution:(id)sender;
 
-@property (nonatomic) NS_ARRAY_OF(NSString *) *styleClasses __attribute__((unavailable("Support for style classes has been removed.")));
+@property (nonatomic) NSArray<NSString *> *styleClasses __attribute__((unavailable("Support for style classes has been removed.")));
 
 - (BOOL)hasStyleClass:(NSString *)styleClass __attribute__((unavailable("Support for style classes has been removed.")));
 
@@ -773,7 +773,7 @@ MGL_EXPORT IB_DESIGNABLE
  @param animated `YES` if you want the map region change to be animated, or `NO`
     if you want the map to display the new region immediately without animations.
  */
-- (void)showAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations animated:(BOOL)animated;
+- (void)showAnnotations:(NSArray<id <MGLAnnotation>> *)annotations animated:(BOOL)animated;
 
 /**
  Sets the visible region so that the map displays the specified annotations with
@@ -788,7 +788,7 @@ MGL_EXPORT IB_DESIGNABLE
  @param animated `YES` if you want the map region change to be animated, or `NO`
     if you want the map to display the new region immediately without animations.
  */
-- (void)showAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations edgePadding:(UIEdgeInsets)insets animated:(BOOL)animated;
+- (void)showAnnotations:(NSArray<id <MGLAnnotation>> *)annotations edgePadding:(UIEdgeInsets)insets animated:(BOOL)animated;
 
 /**
  A camera representing the current viewpoint of the map.
@@ -1076,7 +1076,7 @@ MGL_EXPORT IB_DESIGNABLE
  annotations are associated with the map view, the value of this property is
  `nil`.
  */
-@property (nonatomic, readonly, nullable) NS_ARRAY_OF(id <MGLAnnotation>) *annotations;
+@property (nonatomic, readonly, nullable) NSArray<id <MGLAnnotation>> *annotations;
 
 /**
  Adds an annotation to the map view.
@@ -1104,7 +1104,7 @@ MGL_EXPORT IB_DESIGNABLE
     must conform to the `MGLAnnotation` protocol. The map view retains each
     individual annotation object.
  */
-- (void)addAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations;
+- (void)addAnnotations:(NSArray<id <MGLAnnotation>> *)annotations;
 
 /**
  Removes an annotation from the map view, deselecting it if it is selected.
@@ -1129,7 +1129,7 @@ MGL_EXPORT IB_DESIGNABLE
  @param annotations The array of annotation objects to remove. Objects in the
     array must conform to the `MGLAnnotation` protocol.
  */
-- (void)removeAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations;
+- (void)removeAnnotations:(NSArray<id <MGLAnnotation>> *)annotations;
 
 /**
  Returns an `MGLAnnotationView` if the given annotation is currently associated
@@ -1180,7 +1180,7 @@ MGL_EXPORT IB_DESIGNABLE
  annotations are associated with the map view or if no annotations associated
  with the map view are currently visible, the value of this property is `nil`.
  */
-@property (nonatomic, readonly, nullable) NS_ARRAY_OF(id <MGLAnnotation>) *visibleAnnotations;
+@property (nonatomic, readonly, nullable) NSArray<id <MGLAnnotation>> *visibleAnnotations;
 
 /**
  Returns the list of annotations associated with the receiver that intersect with
@@ -1191,7 +1191,7 @@ MGL_EXPORT IB_DESIGNABLE
     no annotations associated with the map view are currently visible in the
     rectangle.
  */
-- (nullable NS_ARRAY_OF(id <MGLAnnotation>) *)visibleAnnotationsInRect:(CGRect)rect;
+- (nullable NSArray<id <MGLAnnotation>> *)visibleAnnotationsInRect:(CGRect)rect;
 
 #pragma mark Managing Annotation Selections
 
@@ -1208,7 +1208,7 @@ MGL_EXPORT IB_DESIGNABLE
  @note In versions prior to `4.0.0` if the annotation was offscreen it was not
  selected.
  */
-@property (nonatomic, copy) NS_ARRAY_OF(id <MGLAnnotation>) *selectedAnnotations;
+@property (nonatomic, copy) NSArray<id <MGLAnnotation>> *selectedAnnotations;
 
 /**
  Selects an annotation and displays its callout view.
@@ -1246,7 +1246,7 @@ MGL_EXPORT IB_DESIGNABLE
  overlays are associated with the map view, the value of this property is
  empty array.
  */
-@property (nonatomic, readonly, nonnull) NS_ARRAY_OF(id <MGLOverlay>) *overlays;
+@property (nonatomic, readonly, nonnull) NSArray<id <MGLOverlay>> *overlays;
 
 /**
  Adds a single overlay object to the map.
@@ -1265,7 +1265,7 @@ MGL_EXPORT IB_DESIGNABLE
  @param overlays An array of objects, each of which must conform to the
     `MGLOverlay` protocol.
  */
-- (void)addOverlays:(NS_ARRAY_OF(id <MGLOverlay>) *)overlays;
+- (void)addOverlays:(NSArray<id <MGLOverlay>> *)overlays;
 
 /**
  Removes a single overlay object from the map.
@@ -1285,7 +1285,7 @@ MGL_EXPORT IB_DESIGNABLE
  @param overlays An array of objects, each of which conforms to the `MGLOverlay`
     protocol.
  */
-- (void)removeOverlays:(NS_ARRAY_OF(id <MGLOverlay>) *)overlays;
+- (void)removeOverlays:(NSArray<id <MGLOverlay>> *)overlays;
 
 #pragma mark Accessing the Underlying Map Data
 
@@ -1301,7 +1301,7 @@ MGL_EXPORT IB_DESIGNABLE
  @return An array of objects conforming to the `MGLFeature` protocol that
     represent features in the sources used by the current style.
  */
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesAtPoint:(CGPoint)point NS_SWIFT_NAME(visibleFeatures(at:));
+- (NSArray<id <MGLFeature>> *)visibleFeaturesAtPoint:(CGPoint)point NS_SWIFT_NAME(visibleFeatures(at:));
 
 /**
  Returns an array of rendered map features that intersect with a given point,
@@ -1320,7 +1320,7 @@ MGL_EXPORT IB_DESIGNABLE
  @return An array of objects conforming to the `MGLFeature` protocol that 
     represent features in the sources used by the current style.
  */
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(nullable NS_SET_OF(NSString *) *)styleLayerIdentifiers NS_SWIFT_NAME(visibleFeatures(at:styleLayerIdentifiers:));
+- (NSArray<id <MGLFeature>> *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(nullable NSSet<NSString *> *)styleLayerIdentifiers NS_SWIFT_NAME(visibleFeatures(at:styleLayerIdentifiers:));
 
 /**
  Returns an array of rendered map features that intersect with a given point,
@@ -1387,7 +1387,7 @@ MGL_EXPORT IB_DESIGNABLE
  @return An array of objects conforming to the `MGLFeature` protocol that
     represent features in the sources used by the current style.
  */
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(nullable NS_SET_OF(NSString *) *)styleLayerIdentifiers predicate:(nullable NSPredicate *)predicate NS_SWIFT_NAME(visibleFeatures(at:styleLayerIdentifiers:predicate:));
+- (NSArray<id <MGLFeature>> *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(nullable NSSet<NSString *> *)styleLayerIdentifiers predicate:(nullable NSPredicate *)predicate NS_SWIFT_NAME(visibleFeatures(at:styleLayerIdentifiers:predicate:));
 
 /**
  Returns an array of rendered map features that intersect with the given
@@ -1402,7 +1402,7 @@ MGL_EXPORT IB_DESIGNABLE
  @return An array of objects conforming to the `MGLFeature` protocol that
     represent features in the sources used by the current style.
  */
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesInRect:(CGRect)rect NS_SWIFT_NAME(visibleFeatures(in:));
+- (NSArray<id <MGLFeature>> *)visibleFeaturesInRect:(CGRect)rect NS_SWIFT_NAME(visibleFeatures(in:));
 
 /**
  Returns an array of rendered map features that intersect with the given
@@ -1421,7 +1421,7 @@ MGL_EXPORT IB_DESIGNABLE
  @return An array of objects conforming to the `MGLFeature` protocol that
     represent features in the sources used by the current style.
  */
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(nullable NS_SET_OF(NSString *) *)styleLayerIdentifiers NS_SWIFT_NAME(visibleFeatures(in:styleLayerIdentifiers:));
+- (NSArray<id <MGLFeature>> *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(nullable NSSet<NSString *> *)styleLayerIdentifiers NS_SWIFT_NAME(visibleFeatures(in:styleLayerIdentifiers:));
 
 /**
  Returns an array of rendered map features that intersect with the given
@@ -1493,7 +1493,7 @@ MGL_EXPORT IB_DESIGNABLE
  @return An array of objects conforming to the `MGLFeature` protocol that
     represent features in the sources used by the current style.
  */
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(nullable NS_SET_OF(NSString *) *)styleLayerIdentifiers predicate:(nullable NSPredicate *)predicate NS_SWIFT_NAME(visibleFeatures(in:styleLayerIdentifiers:predicate:));
+- (NSArray<id <MGLFeature>> *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(nullable NSSet<NSString *> *)styleLayerIdentifiers predicate:(nullable NSPredicate *)predicate NS_SWIFT_NAME(visibleFeatures(in:styleLayerIdentifiers:predicate:));
 
 #pragma mark Debugging the Map
 
diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index c679979d37..e16411f2c5 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -49,7 +49,7 @@
 #import "NSBundle+MGLAdditions.h"
 #import "NSDate+MGLAdditions.h"
 #import "NSException+MGLAdditions.h"
-#import "NSPredicate+MGLAdditions.h"
+#import "NSPredicate+MGLPrivateAdditions.h"
 #import "NSProcessInfo+MGLAdditions.h"
 #import "NSString+MGLAdditions.h"
 #import "NSURL+MGLAdditions.h"
@@ -194,14 +194,14 @@ public:
 @property (nonatomic) GLKView *glView;
 @property (nonatomic) UIImageView *glSnapshotView;
 
-@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *scaleBarConstraints;
+@property (nonatomic) NSMutableArray<NSLayoutConstraint *> *scaleBarConstraints;
 @property (nonatomic, readwrite) MGLScaleBar *scaleBar;
 @property (nonatomic, readwrite) UIImageView *compassView;
-@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *compassViewConstraints;
+@property (nonatomic) NSMutableArray<NSLayoutConstraint *> *compassViewConstraints;
 @property (nonatomic, readwrite) UIImageView *logoView;
-@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *logoViewConstraints;
+@property (nonatomic) NSMutableArray<NSLayoutConstraint *> *logoViewConstraints;
 @property (nonatomic, readwrite) UIButton *attributionButton;
-@property (nonatomic) NS_MUTABLE_ARRAY_OF(NSLayoutConstraint *) *attributionButtonConstraints;
+@property (nonatomic) NSMutableArray<NSLayoutConstraint *> *attributionButtonConstraints;
 
 @property (nonatomic, readwrite) MGLStyle *style;
 
@@ -217,7 +217,7 @@ public:
 @property (nonatomic) MGLCameraChangeReason cameraChangeReasonBitmask;
 
 /// Mapping from reusable identifiers to annotation images.
-@property (nonatomic) NS_MUTABLE_DICTIONARY_OF(NSString *, MGLAnnotationImage *) *annotationImagesByIdentifier;
+@property (nonatomic) NSMutableDictionary<NSString *, MGLAnnotationImage *> *annotationImagesByIdentifier;
 
 /// Currently shown popover representing the selected annotation.
 @property (nonatomic) UIView<MGLCalloutView> *calloutViewForSelectedAnnotation;
@@ -235,7 +235,7 @@ public:
 @property (nonatomic) MGLMapViewProxyAccessibilityElement *mapViewProxyAccessibilityElement;
 @property (nonatomic) MGLAnnotationContainerView *annotationContainerView;
 @property (nonatomic) MGLUserLocation *userLocation;
-@property (nonatomic) NS_MUTABLE_DICTIONARY_OF(NSString *, NS_MUTABLE_ARRAY_OF(MGLAnnotationView *) *) *annotationViewReuseQueueByIdentifier;
+@property (nonatomic) NSMutableDictionary<NSString *, NSMutableArray<MGLAnnotationView *> *> *annotationViewReuseQueueByIdentifier;
 
 @end
 
@@ -287,9 +287,9 @@ public:
     BOOL _delegateHasLineWidthsForShapeAnnotations;
 
     MGLCompassDirectionFormatter *_accessibilityCompassFormatter;
-    NS_ARRAY_OF(id <MGLFeature>) *_visiblePlaceFeatures;
-    NS_ARRAY_OF(id <MGLFeature>) *_visibleRoadFeatures;
-    NS_MUTABLE_SET_OF(MGLFeatureAccessibilityElement *) *_featureAccessibilityElements;
+    NSArray<id <MGLFeature>> *_visiblePlaceFeatures;
+    NSArray<id <MGLFeature>> *_visibleRoadFeatures;
+    NSMutableSet<MGLFeatureAccessibilityElement *> *_featureAccessibilityElements;
     BOOL _accessibilityValueAnnouncementIsPending;
 
     MGLReachability *_reachability;
@@ -335,12 +335,12 @@ public:
     }
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingStyle
++ (NSSet<NSString *> *)keyPathsForValuesAffectingStyle
 {
     return [NSSet setWithObject:@"styleURL"];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingStyleURL
++ (NSSet<NSString *> *)keyPathsForValuesAffectingStyleURL
 {
     return [NSSet setWithObjects:@"styleURL__", nil];
 }
@@ -624,18 +624,8 @@ public:
     UIGraphicsBeginImageContextWithOptions(scaleImage.size, NO, [UIScreen mainScreen].scale);
     [scaleImage drawInRect:{ CGPointZero, scaleImage.size }];
 
-    CGFloat northSize = 11;
-    UIFont *northFont;
-    if ([UIFont respondsToSelector:@selector(systemFontOfSize:weight:)])
-    {
-        northFont = [UIFont systemFontOfSize:northSize weight:UIFontWeightUltraLight];
-    }
-    else
-    {
-        northFont = [UIFont systemFontOfSize:northSize];
-    }
     NSAttributedString *north = [[NSAttributedString alloc] initWithString:NSLocalizedStringWithDefaultValue(@"COMPASS_NORTH", nil, nil, @"N", @"Compass abbreviation for north") attributes:@{
-        NSFontAttributeName: northFont,
+        NSFontAttributeName: [UIFont systemFontOfSize:11 weight:UIFontWeightUltraLight],
         NSForegroundColorAttributeName: [UIColor whiteColor],
     }];
     CGRect stringRect = CGRectMake((scaleImage.size.width - north.size.width) / 2,
@@ -1273,7 +1263,7 @@ public:
     }
 }
 
-- (void)touchesBegan:(__unused NS_SET_OF(UITouch *) *)touches withEvent:(__unused UIEvent *)event
+- (void)touchesBegan:(__unused NSSet<UITouch *> *)touches withEvent:(__unused UIEvent *)event
 {
     _changeDelimiterSuppressionDepth = 0;
     _mbglMap->setGestureInProgress(false);
@@ -1281,7 +1271,7 @@ public:
     {
         [self setUserTrackingMode:MGLUserTrackingModeNone animated:NO];
     }
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 }
 
 - (void)notifyGestureDidBegin {
@@ -1331,7 +1321,7 @@ public:
 {
     if ( ! self.isScrollEnabled) return;
 
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     MGLMapCamera *oldCamera = self.camera;
 
@@ -1400,7 +1390,7 @@ public:
 {
     if ( ! self.isZoomEnabled) return;
 
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     CGPoint centerPoint = [self anchorPointForGesture:pinch];
     MGLMapCamera *oldCamera = self.camera;
@@ -1501,7 +1491,7 @@ public:
 {
     if ( ! self.isRotateEnabled) return;
 
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     CGPoint centerPoint = [self anchorPointForGesture:rotate];
     MGLMapCamera *oldCamera = self.camera;
@@ -1706,7 +1696,7 @@ public:
 {
     if ( ! self.isZoomEnabled) return;
 
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     if (doubleTap.state == UIGestureRecognizerStateEnded)
     {
@@ -1747,7 +1737,7 @@ public:
 
     if (_mbglMap->getZoom() == _mbglMap->getMinZoom()) return;
 
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonGestureZoomOut;
 
@@ -1786,7 +1776,7 @@ public:
 {
     if ( ! self.isZoomEnabled) return;
 
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonGestureOneFingerZoom;
 
@@ -1831,7 +1821,7 @@ public:
 {
     if ( ! self.isPitchEnabled) return;
 
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonGestureTilt;
 
@@ -2238,22 +2228,22 @@ public:
     }
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingZoomEnabled
++ (NSSet<NSString *> *)keyPathsForValuesAffectingZoomEnabled
 {
     return [NSSet setWithObject:@"allowsZooming"];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingScrollEnabled
++ (NSSet<NSString *> *)keyPathsForValuesAffectingScrollEnabled
 {
     return [NSSet setWithObject:@"allowsScrolling"];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingRotateEnabled
++ (NSSet<NSString *> *)keyPathsForValuesAffectingRotateEnabled
 {
     return [NSSet setWithObject:@"allowsRotating"];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingPitchEnabled
++ (NSSet<NSString *> *)keyPathsForValuesAffectingPitchEnabled
 {
     return [NSSet setWithObject:@"allowsTilting"];
 }
@@ -2419,7 +2409,7 @@ public:
     return value;
 }
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visiblePlaceFeatures
+- (NSArray<id <MGLFeature>> *)visiblePlaceFeatures
 {
     if (!_visiblePlaceFeatures)
     {
@@ -2429,7 +2419,7 @@ public:
     return _visiblePlaceFeatures;
 }
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleRoadFeatures
+- (NSArray<id <MGLFeature>> *)visibleRoadFeatures
 {
     if (!_visibleRoadFeatures)
     {
@@ -2907,7 +2897,7 @@ public:
 
 #pragma mark - Geography -
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingCenterCoordinate
++ (NSSet<NSString *> *)keyPathsForValuesAffectingCenterCoordinate
 {
     return [NSSet setWithObjects:@"latitude", @"longitude", @"camera", nil];
 }
@@ -2991,14 +2981,14 @@ public:
         return;
     }
     
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonProgrammatic;
 
     _mbglMap->easeTo(cameraOptions, animationOptions);
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingZoomLevel
++ (NSSet<NSString *> *)keyPathsForValuesAffectingZoomLevel
 {
     return [NSSet setWithObject:@"camera"];
 }
@@ -3016,7 +3006,7 @@ public:
 - (void)setZoomLevel:(double)zoomLevel animated:(BOOL)animated
 {
     if (zoomLevel == self.zoomLevel) return;
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonProgrammatic;
 
@@ -3159,7 +3149,7 @@ public:
     }
     
     [self willChangeValueForKey:@"visibleCoordinateBounds"];
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonProgrammatic;
 
@@ -3167,7 +3157,7 @@ public:
     [self didChangeValueForKey:@"visibleCoordinateBounds"];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingDirection
++ (NSSet<NSString *> *)keyPathsForValuesAffectingDirection
 {
     return [NSSet setWithObject:@"camera"];
 }
@@ -3192,7 +3182,7 @@ public:
 - (void)_setDirection:(CLLocationDirection)direction animated:(BOOL)animated
 {
     if (direction == self.direction) return;
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     CGFloat duration = animated ? MGLAnimationDuration : 0;
 
@@ -3217,12 +3207,12 @@ public:
     [self setDirection:direction animated:NO];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingPitch
++ (NSSet<NSString *> *)keyPathsForValuesAffectingPitch
 {
     return [NSSet setWithObject:@"camera"];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingCamera
++ (NSSet<NSString *> *)keyPathsForValuesAffectingCamera
 {
     return [NSSet setWithObjects:@"longitude", @"latitude", @"centerCoordinate", @"zoomLevel", @"direction", nil];
 }
@@ -3281,7 +3271,7 @@ public:
     }
 
     [self willChangeValueForKey:@"camera"];
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonProgrammatic;
 
@@ -3340,7 +3330,7 @@ public:
     }
 
     [self willChangeValueForKey:@"camera"];
-    _mbglMap->cancelTransitions();
+    [self cancelTransitions];
 
     self.cameraChangeReasonBitmask |= MGLCameraChangeReasonProgrammatic;
 
@@ -3349,6 +3339,12 @@ public:
     [self didChangeValueForKey:@"camera"];
 }
 
+- (void)cancelTransitions {
+    self.cameraChangeReasonBitmask |= MGLCameraChangeReasonTransitionCancelled;
+    _mbglMap->cancelTransitions();
+    self.cameraChangeReasonBitmask &= ~MGLCameraChangeReasonTransitionCancelled;
+}
+
 - (MGLMapCamera *)cameraThatFitsCoordinateBounds:(MGLCoordinateBounds)bounds
 {
     return [self cameraThatFitsCoordinateBounds:bounds edgePadding:UIEdgeInsetsZero];
@@ -3496,7 +3492,7 @@ public:
 
 #pragma mark - Annotations -
 
-- (nullable NS_ARRAY_OF(id <MGLAnnotation>) *)annotations
+- (nullable NSArray<id <MGLAnnotation>> *)annotations
 {
     if (_annotationContextsByAnnotationTag.empty())
     {
@@ -3520,12 +3516,12 @@ public:
     return [NSArray arrayWithObjects:&annotations[0] count:annotations.size()];
 }
 
-- (nullable NS_ARRAY_OF(id <MGLAnnotation>) *)visibleAnnotations
+- (nullable NSArray<id <MGLAnnotation>> *)visibleAnnotations
 {
     return [self visibleAnnotationsInRect:self.bounds];
 }
 
-- (nullable NS_ARRAY_OF(id <MGLAnnotation>) *)visibleAnnotationsInRect:(CGRect)rect
+- (nullable NSArray<id <MGLAnnotation>> *)visibleAnnotationsInRect:(CGRect)rect
 {
     if (_annotationContextsByAnnotationTag.empty())
     {
@@ -3599,7 +3595,7 @@ public:
     [self addAnnotations:@[ annotation ]];
 }
 
-- (void)addAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations
+- (void)addAnnotations:(NSArray<id <MGLAnnotation>> *)annotations
 {
     if ( ! annotations) return;
     [self willChangeValueForKey:@"annotations"];
@@ -3740,7 +3736,7 @@ public:
     UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification, nil);
 }
 
-- (void)updateAnnotationContainerViewWithAnnotationViews:(NS_ARRAY_OF(MGLAnnotationView *) *)annotationViews
+- (void)updateAnnotationContainerViewWithAnnotationViews:(NSArray<MGLAnnotationView *> *)annotationViews
 {
     if (annotationViews.count == 0) return;
 
@@ -3895,7 +3891,7 @@ public:
     [self removeAnnotations:@[ annotation ]];
 }
 
-- (void)removeAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations
+- (void)removeAnnotations:(NSArray<id <MGLAnnotation>> *)annotations
 {
     if ( ! annotations) return;
 
@@ -3956,11 +3952,11 @@ public:
     }
 }
 
-- (nonnull NS_ARRAY_OF(id <MGLOverlay>) *)overlays
+- (nonnull NSArray<id <MGLOverlay>> *)overlays
 {
     if (self.annotations == nil) { return @[]; }
 
-    NS_MUTABLE_ARRAY_OF(id <MGLOverlay>) *mutableOverlays = [NSMutableArray array];
+    NSMutableArray<id <MGLOverlay>> *mutableOverlays = [NSMutableArray array];
 
     [self.annotations enumerateObjectsUsingBlock:^(id<MGLAnnotation>  _Nonnull annotation, NSUInteger idx, BOOL * _Nonnull stop) {
         if ([annotation conformsToProtocol:@protocol(MGLOverlay)])
@@ -3977,7 +3973,7 @@ public:
     [self addOverlays:@[ overlay ]];
 }
 
-- (void)addOverlays:(NS_ARRAY_OF(id <MGLOverlay>) *)overlays
+- (void)addOverlays:(NSArray<id <MGLOverlay>> *)overlays
 {
 #if DEBUG
     for (id <MGLOverlay> overlay in overlays)
@@ -3994,7 +3990,7 @@ public:
     [self removeOverlays:@[ overlay ]];
 }
 
-- (void)removeOverlays:(NS_ARRAY_OF(id <MGLOverlay>) *)overlays
+- (void)removeOverlays:(NSArray<id <MGLOverlay>> *)overlays
 {
 #if DEBUG
     for (id <MGLOverlay> overlay in overlays)
@@ -4226,13 +4222,13 @@ public:
     [self didChangeValueForKey:@"selectedAnnotations"];
 }
 
-- (NS_ARRAY_OF(id <MGLAnnotation>) *)selectedAnnotations
+- (NSArray<id <MGLAnnotation>> *)selectedAnnotations
 {
     id <MGLAnnotation> selectedAnnotation = self.selectedAnnotation;
     return (selectedAnnotation ? @[ selectedAnnotation ] : @[]);
 }
 
-- (void)setSelectedAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)selectedAnnotations
+- (void)setSelectedAnnotations:(NSArray<id <MGLAnnotation>> *)selectedAnnotations
 {
     if ( ! selectedAnnotations.count) return;
 
@@ -4570,6 +4566,8 @@ public:
         return;
     }
 
+    __weak __typeof__(self) weakSelf = self;
+
     // The user location callout view initially points to the user location
     // annotation’s implicit (visual) frame, which is offset from the
     // annotation’s explicit frame. Now the callout view needs to rendezvous
@@ -4583,15 +4581,21 @@ public:
                                  UIViewAnimationOptionBeginFromCurrentState)
                      animations:^
      {
+         __typeof__(self) strongSelf = weakSelf;
+         if ( ! strongSelf)
+         {
+             return;
+         }
+
          calloutView.frame = CGRectOffset(calloutView.frame,
-                                          _initialImplicitCalloutViewOffset.x,
-                                          _initialImplicitCalloutViewOffset.y);
-         _initialImplicitCalloutViewOffset = CGPointZero;
+                                          strongSelf->_initialImplicitCalloutViewOffset.x,
+                                          strongSelf->_initialImplicitCalloutViewOffset.y);
+         strongSelf->_initialImplicitCalloutViewOffset = CGPointZero;
      }
                      completion:NULL];
 }
 
-- (void)showAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations animated:(BOOL)animated
+- (void)showAnnotations:(NSArray<id <MGLAnnotation>> *)annotations animated:(BOOL)animated
 {
     CGFloat maximumPadding = 100;
     CGFloat yPadding = (self.frame.size.height / 5 <= maximumPadding) ? (self.frame.size.height / 5) : maximumPadding;
@@ -4602,7 +4606,7 @@ public:
     [self showAnnotations:annotations edgePadding:edgeInsets animated:animated];
 }
 
-- (void)showAnnotations:(NS_ARRAY_OF(id <MGLAnnotation>) *)annotations edgePadding:(UIEdgeInsets)insets animated:(BOOL)animated
+- (void)showAnnotations:(NSArray<id <MGLAnnotation>> *)annotations edgePadding:(UIEdgeInsets)insets animated:(BOOL)animated
 {
     if ( ! annotations || ! annotations.count) return;
 
@@ -4790,7 +4794,7 @@ public:
     }
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingUserLocation
++ (NSSet<NSString *> *)keyPathsForValuesAffectingUserLocation
 {
     return [NSSet setWithObject:@"userLocationAnnotationView"];
 }
@@ -5281,16 +5285,16 @@ public:
 
 #pragma mark Data
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesAtPoint:(CGPoint)point
+- (NSArray<id <MGLFeature>> *)visibleFeaturesAtPoint:(CGPoint)point
 {
     return [self visibleFeaturesAtPoint:point inStyleLayersWithIdentifiers:nil];
 }
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(NS_SET_OF(NSString *) *)styleLayerIdentifiers {
+- (NSArray<id <MGLFeature>> *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(NSSet<NSString *> *)styleLayerIdentifiers {
     return [self visibleFeaturesAtPoint:point inStyleLayersWithIdentifiers:styleLayerIdentifiers predicate:nil];
 }
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(NS_SET_OF(NSString *) *)styleLayerIdentifiers predicate:(NSPredicate *)predicate
+- (NSArray<id <MGLFeature>> *)visibleFeaturesAtPoint:(CGPoint)point inStyleLayersWithIdentifiers:(NSSet<NSString *> *)styleLayerIdentifiers predicate:(NSPredicate *)predicate
 {
     mbgl::ScreenCoordinate screenCoordinate = { point.x, point.y };
 
@@ -5315,15 +5319,15 @@ public:
     return MGLFeaturesFromMBGLFeatures(features);
 }
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesInRect:(CGRect)rect {
+- (NSArray<id <MGLFeature>> *)visibleFeaturesInRect:(CGRect)rect {
     return [self visibleFeaturesInRect:rect inStyleLayersWithIdentifiers:nil];
 }
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(NS_SET_OF(NSString *) *)styleLayerIdentifiers {
+- (NSArray<id <MGLFeature>> *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(NSSet<NSString *> *)styleLayerIdentifiers {
     return [self visibleFeaturesInRect:rect inStyleLayersWithIdentifiers:styleLayerIdentifiers predicate:nil];
 }
 
-- (NS_ARRAY_OF(id <MGLFeature>) *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(NS_SET_OF(NSString *) *)styleLayerIdentifiers predicate:(NSPredicate *)predicate {
+- (NSArray<id <MGLFeature>> *)visibleFeaturesInRect:(CGRect)rect inStyleLayersWithIdentifiers:(NSSet<NSString *> *)styleLayerIdentifiers predicate:(NSPredicate *)predicate {
     mbgl::ScreenBox screenBox = {
         { CGRectGetMinX(rect), CGRectGetMinY(rect) },
         { CGRectGetMaxX(rect), CGRectGetMaxY(rect) },
@@ -5717,10 +5721,12 @@ public:
                 if (annotationView.layer.animationKeys.count > 0) {
                     continue;
                 }
+
                 // Move the annotation view far out of view to the left
-                CGRect adjustedFrame = annotationView.frame;
-                adjustedFrame.origin.x = -CGRectGetWidth(self.frame) * 10.0;
-                annotationView.frame = adjustedFrame;
+                CGPoint adjustedCenter = annotationView.center;
+                adjustedCenter.x = -CGRectGetWidth(self.frame) * 10.0;
+                annotationView.center = adjustedCenter;
+
                 [self enqueueAnnotationViewForAnnotationContext:annotationContext];
             }
         }
@@ -6055,7 +6061,7 @@ public:
                                                views:views]];
 }
 
-- (NS_MUTABLE_ARRAY_OF(MGLAnnotationView *) *)annotationViewReuseQueueForIdentifier:(NSString *)identifier {
+- (NSMutableArray<MGLAnnotationView *> *)annotationViewReuseQueueForIdentifier:(NSString *)identifier {
     if (!_annotationViewReuseQueueByIdentifier[identifier])
     {
         _annotationViewReuseQueueByIdentifier[identifier] = [NSMutableArray array];
@@ -6212,7 +6218,7 @@ private:
 
 @implementation MGLMapView (IBAdditions)
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingStyleURL__
++ (NSSet<NSString *> *)keyPathsForValuesAffectingStyleURL__
 {
     return [NSSet setWithObject:@"styleURL"];
 }
@@ -6235,7 +6241,7 @@ private:
     self.styleURL = url;
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingLatitude
++ (NSSet<NSString *> *)keyPathsForValuesAffectingLatitude
 {
     return [NSSet setWithObjects:@"centerCoordinate", @"camera", nil];
 }
@@ -6261,7 +6267,7 @@ private:
     }
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingLongitude
++ (NSSet<NSString *> *)keyPathsForValuesAffectingLongitude
 {
     return [NSSet setWithObjects:@"centerCoordinate", @"camera", nil];
 }
@@ -6287,7 +6293,7 @@ private:
     }
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingAllowsZooming
++ (NSSet<NSString *> *)keyPathsForValuesAffectingAllowsZooming
 {
     return [NSSet setWithObject:@"zoomEnabled"];
 }
@@ -6302,7 +6308,7 @@ private:
     self.zoomEnabled = allowsZooming;
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingAllowsScrolling
++ (NSSet<NSString *> *)keyPathsForValuesAffectingAllowsScrolling
 {
     return [NSSet setWithObject:@"scrollEnabled"];
 }
@@ -6317,7 +6323,7 @@ private:
     self.scrollEnabled = allowsScrolling;
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingAllowsRotating
++ (NSSet<NSString *> *)keyPathsForValuesAffectingAllowsRotating
 {
     return [NSSet setWithObject:@"rotateEnabled"];
 }
@@ -6332,7 +6338,7 @@ private:
     self.rotateEnabled = allowsRotating;
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingAllowsTilting
++ (NSSet<NSString *> *)keyPathsForValuesAffectingAllowsTilting
 {
     return [NSSet setWithObject:@"pitchEnabled"];
 }
@@ -6347,7 +6353,7 @@ private:
     self.pitchEnabled = allowsTilting;
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingShowsHeading
++ (NSSet<NSString *> *)keyPathsForValuesAffectingShowsHeading
 {
     return [NSSet setWithObject:@"showsUserHeadingIndicator"];
 }
diff --git a/platform/ios/src/MGLMapViewDelegate.h b/platform/ios/src/MGLMapViewDelegate.h
index 0368d8413c..201e3db84b 100644
--- a/platform/ios/src/MGLMapViewDelegate.h
+++ b/platform/ios/src/MGLMapViewDelegate.h
@@ -428,7 +428,7 @@ NS_ASSUME_NONNULL_BEGIN
  @param annotationViews An array of `MGLAnnotationView` objects representing the
     views that were added.
  */
-- (void)mapView:(MGLMapView *)mapView didAddAnnotationViews:(NS_ARRAY_OF(MGLAnnotationView *) *)annotationViews;
+- (void)mapView:(MGLMapView *)mapView didAddAnnotationViews:(NSArray<MGLAnnotationView *> *)annotationViews;
 
 #pragma mark Selecting Annotations
 
diff --git a/platform/ios/src/MGLScaleBar.mm b/platform/ios/src/MGLScaleBar.mm
index 139dffdfab..a2fc24c75c 100644
--- a/platform/ios/src/MGLScaleBar.mm
+++ b/platform/ios/src/MGLScaleBar.mm
@@ -178,12 +178,7 @@ static const CGFloat MGLFeetPerMeter = 3.28084;
 #pragma mark - Convenience methods
 
 - (BOOL)usesRightToLeftLayout {
-    // semanticContentAttribute is iOS 9+
-    if ([self.superview respondsToSelector:@selector(semanticContentAttribute)]) {
-        return [UIView userInterfaceLayoutDirectionForSemanticContentAttribute:self.superview.semanticContentAttribute] == UIUserInterfaceLayoutDirectionRightToLeft;
-    } else {
-        return UIApplication.sharedApplication.userInterfaceLayoutDirection == UIUserInterfaceLayoutDirectionRightToLeft;
-    }
+    return [UIView userInterfaceLayoutDirectionForSemanticContentAttribute:self.superview.semanticContentAttribute] == UIUserInterfaceLayoutDirectionRightToLeft;
 }
 
 - (BOOL)usesMetricSystem {
diff --git a/platform/ios/src/MGLUserLocation.m b/platform/ios/src/MGLUserLocation.m
index 074d138a72..245cbf4371 100644
--- a/platform/ios/src/MGLUserLocation.m
+++ b/platform/ios/src/MGLUserLocation.m
@@ -68,7 +68,7 @@ NS_ASSUME_NONNULL_END
     return ! [key isEqualToString:@"location"] && ! [key isEqualToString:@"heading"];
 }
 
-+ (NS_SET_OF(NSString *) *)keyPathsForValuesAffectingCoordinate
++ (NSSet<NSString *> *)keyPathsForValuesAffectingCoordinate
 {
     return [NSSet setWithObject:@"location"];
 }
diff --git a/platform/ios/src/Mapbox.h b/platform/ios/src/Mapbox.h
index 20417dbbd4..7beb8b766b 100644
--- a/platform/ios/src/Mapbox.h
+++ b/platform/ios/src/Mapbox.h
@@ -66,3 +66,4 @@ FOUNDATION_EXPORT MGL_EXPORT const unsigned char MapboxVersionString[];
 #import "MGLAttributionInfo.h"
 #import "MGLMapSnapshotter.h"
 #import "NSExpression+MGLAdditions.h"
+#import "NSPredicate+MGLAdditions.h"
diff --git a/platform/ios/src/UIColor+MGLAdditions.mm b/platform/ios/src/UIColor+MGLAdditions.mm
index 9ca39acda4..7c1fbddc20 100644
--- a/platform/ios/src/UIColor+MGLAdditions.mm
+++ b/platform/ios/src/UIColor+MGLAdditions.mm
@@ -66,7 +66,7 @@
     return [UIColor colorWithRed:[components[0].constantValue doubleValue] / 255.0
                            green:[components[1].constantValue doubleValue] / 255.0
                             blue:[components[2].constantValue doubleValue] / 255.0
-                           alpha:components.count == 3 ? [components[3].constantValue doubleValue] : 1.0];
+                           alpha:components.count == 3 ? 1.0 : [components[3].constantValue doubleValue]];
 }
 
 @end