[ios] Made annotation callouts accessible

Via nfarina/calloutview#84, SMCalloutView is now accessible. Activating a focused annotation now shows its callout view and focuses its left accessory view, if present, or the title view. There is a “return to map” accessibility element for dismissing the callout view and restoring focus to the annotation on the map.

1 files changed, 5 insertions, 0 deletions

diff --git a/platform/ios/app/MBXCustomCalloutView.m b/platform/ios/app/MBXCustomCalloutView.m
index 11ce86e76a..9edc00f6e9 100644
--- a/platform/ios/app/MBXCustomCalloutView.m
+++ b/platform/ios/app/MBXCustomCalloutView.m
@@ -59,6 +59,11 @@ static CGFloat const tipWidth = 10.0;
     CGFloat frameOriginY = rect.origin.y - frameHeight;
     self.frame = CGRectMake(frameOriginX, frameOriginY,
                             frameWidth, frameHeight);
+    
+    if ([self.delegate respondsToSelector:@selector(calloutViewDidAppear:)])
+    {
+        [self.delegate performSelector:@selector(calloutViewDidAppear:) withObject:self];
+    }
 }
 
 - (void)dismissCalloutAnimated:(BOOL)animated