From b3ea068e5db3147dda87a1f39a0391807ff9ff25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Minh=20Nguy=E1=BB=85n?= <mxn@1ec5.org>
Date: Wed, 8 Jul 2015 12:41:34 -0700
Subject: [PATCH] Assert if -mapView:symbolNameForAnnotation: is implemented

Fixes #1851.
---
 platform/ios/MGLMapView.mm | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/platform/ios/MGLMapView.mm b/platform/ios/MGLMapView.mm
index d6500889f..32ba5a03c 100644
--- a/platform/ios/MGLMapView.mm
+++ b/platform/ios/MGLMapView.mm
@@ -455,6 +455,14 @@ std::chrono::steady_clock::duration secondsAsDuration(float duration)
     if (_delegate == delegate) return;
 
     _delegate = delegate;
+    
+    if ([delegate respondsToSelector:@selector(mapView:symbolNameForAnnotation:)])
+    {
+        [NSException raise:@"Method unavailable" format:
+         @"-mapView:symbolNameForAnnotation: has been removed from the MGLMapViewDelegate protocol, but %@ still implements it. "
+         @"Implement -[%@ mapView:imageForAnnotation:] instead.",
+         NSStringFromClass([delegate class]), NSStringFromClass([delegate class])];
+    }
 }
 
 #pragma mark - Layout -