Add `overlays` property to iOS sdk

Implementation is identical to the one in macOS SDK.

2 files changed, 23 insertions, 0 deletions

diff --git a/platform/ios/src/MGLMapView.h b/platform/ios/src/MGLMapView.h
index 8d26b1c90e..93fd681e39 100644
--- a/platform/ios/src/MGLMapView.h
+++ b/platform/ios/src/MGLMapView.h
@@ -1131,6 +1131,15 @@ IB_DESIGNABLE
 #pragma mark Overlaying the Map
 
 /**
+ The complete list of overlays associated with the receiver. (read-only)
+
+ The objects in this array must adopt the `MGLOverlay` protocol. If no
+ overlays are associated with the map view, the value of this property is
+ `nil`.
+ */
+@property (nonatomic, readonly, nullable) NS_ARRAY_OF(id <MGLOverlay>) *overlays;
+
+/**
  Adds a single overlay object to the map.
 
  To remove an overlay from a map, use the `-removeOverlay:` method.
diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index 8cba1187ea..c1d6ad0217 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -3531,6 +3531,20 @@ public:
     }
 }
 
+- (nullable NS_ARRAY_OF(id <MGLOverlay>) *)overlays {
+    if (self.annotations == nil) { return nil; }
+
+    NS_MUTABLE_ARRAY_OF(id <MGLOverlay>) *mutableOverlays = [NSMutableArray new];
+
+    [self.annotations enumerateObjectsUsingBlock:^(id<MGLAnnotation>  _Nonnull annotation, NSUInteger idx, BOOL * _Nonnull stop) {
+        if ([annotation conformsToProtocol:@protocol(MGLOverlay)]) {
+            [mutableOverlays addObject:(id<MGLOverlay>)annotation];
+        }
+    }];
+
+    return [NSArray arrayWithArray:mutableOverlays];
+}
+
 - (void)addOverlay:(id <MGLOverlay>)overlay
 {
     [self addOverlays:@[ overlay ]];