1 files changed, 49 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLStyleLayer.mm b/platform/darwin/src/MGLStyleLayer.mm
index 47f41e0388..60226a6842 100644
--- a/platform/darwin/src/MGLStyleLayer.mm
+++ b/platform/darwin/src/MGLStyleLayer.mm
@@ -65,6 +65,55 @@
     return self.rawLayer->getMinZoom();
 }
 
+- (void)setTransition:(MGLTransition)transition forKey:(NSString *)key
+{
+    SEL setPropertyTransitionSelector = [self mbx_selectorForKey:key];
+    
+    if ([self respondsToSelector:setPropertyTransitionSelector]) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+        [self performSelector:setPropertyTransitionSelector withObject:[NSValue value:&transition withObjCType:@encode(MGLTransition)] ];
+#pragma clang diagnostic pop
+    }
+}
+
+- (MGLTransition)transitionForKey:(NSString *)key
+{
+    MGLTransition transition;
+    
+    SEL getPropertyTransitionSelector = [self mbx_selectorForKey:key];
+    
+    if ([self respondsToSelector:getPropertyTransitionSelector]) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+        NSValue *transitionValue = [self performSelector:getPropertyTransitionSelector];
+        [transitionValue getValue:&transition];
+#pragma clang diagnostic pop
+    }
+    
+    return transition;
+}
+
+- (SEL)mbx_selectorForKey:(NSString *)key
+{
+    NSString *camelCaseKey;
+    if ([key length] > 1) {
+        camelCaseKey = [NSString stringWithFormat:@"%@%@", [[key substringToIndex:1] uppercaseString], [key substringFromIndex:1]];
+    } else {
+        camelCaseKey = [key uppercaseString];
+    }
+    NSString *setPropertyTransitionString = [NSString stringWithFormat:@"mbx_set%@Transition:", camelCaseKey];
+    SEL propertyTransitionSelector = NSSelectorFromString(setPropertyTransitionString);
+    
+    return propertyTransitionSelector;
+}
+
+- (NSArray *)transitionKeys
+{
+    // This is overridden by subclasses
+    return nil;
+}
+
 - (NSString *)description
 {
     return [NSString stringWithFormat:@"<%@: %p; identifier = %@; visible = %@>",