diff options
Diffstat (limited to 'platform/ios/src/MGLMapView.mm')
| -rw-r--r-- | platform/ios/src/MGLMapView.mm | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm index 79467a065f..6f51d4b523 100644 --- a/platform/ios/src/MGLMapView.mm +++ b/platform/ios/src/MGLMapView.mm @@ -3777,7 +3777,14 @@ public: UIView <MGLCalloutView> *calloutView; if ([self.delegate respondsToSelector:@selector(mapView:calloutViewForAnnotation:)]) { - calloutView = [self.delegate mapView:self calloutViewForAnnotation:annotation]; + id providedCalloutView = [self.delegate mapView:self calloutViewForAnnotation:annotation]; + if (providedCalloutView) { + if (![providedCalloutView isKindOfClass:[UIView class]]) { + [NSException raise:NSInvalidArgumentException format:@"Callout view must be a kind of UIView"]; + } + NSAssert([providedCalloutView conformsToProtocol:@protocol(MGLCalloutView)], @"callout view must conform to MGLCalloutView"); + calloutView = providedCalloutView; + } } if (!calloutView) { |