[ios] Ignore non-conforming user location annotation views

1 files changed, 7 insertions, 3 deletions

diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index c3091a588b..f43029d0bc 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -3824,10 +3824,14 @@ public:
         if ([self.delegate respondsToSelector:@selector(mapView:viewForAnnotation:)])
         {
             userLocationAnnotationView = (MGLUserLocationAnnotationView *)[self.delegate mapView:self viewForAnnotation:self.userLocation];
-            if (userLocationAnnotationView)
+            if (userLocationAnnotationView && ! [userLocationAnnotationView isKindOfClass:MGLUserLocationAnnotationView.class])
             {
-                NSAssert([userLocationAnnotationView.class isSubclassOfClass:MGLUserLocationAnnotationView.class],
-                         @"User location annotation view must be a subclass of MGLUserLocationAnnotationView");
+                static dispatch_once_t onceToken;
+                dispatch_once(&onceToken, ^{
+                    NSLog(@"Ignoring user location annotation view with type %@. User location annotation view must be a kind of MGLUserLocationAnnotationView. This warning is only shown once and will become an error in a future version.", NSStringFromClass(userLocationAnnotationView.class));
+                });
+
+                userLocationAnnotationView = nil;
             }
         }