Fix an issue where state change notifications can be sent mulitple ti…

…mes. (#1372) Before the change: both - (void)setShouldInvertStrongReference:(BOOL)shouldInvertStrongReference and - (void)setNode:(ASDisplayNode *)node will call through [self setupReferencesWithNode:node]; which call the [node addInterfaceStateDelegate:self];
TextureGroup · Mar 8, 2019 · aeb370f · aeb370f
1 parent d7eda2e
commit aeb370f
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/Source/ASNodeController+Beta.mm b/Source/ASNodeController+Beta.mm
@@ -50,13 +50,16 @@ - (void)setupReferencesWithNode:(ASDisplayNode *)node
   }
 
   [node __setNodeController:self];
-  [node addInterfaceStateDelegate:self];
 }
 
 - (void)setNode:(ASDisplayNode *)node
 {
   ASLockScopeSelf();
+  if (node == _node) {
+    return;
+  }
   [self setupReferencesWithNode:node];
+  [node addInterfaceStateDelegate:self];
 }
 
 - (void)setShouldInvertStrongReference:(BOOL)shouldInvertStrongReference