From a834382bcbc521f236d96689d6c6644a4df903fc Mon Sep 17 00:00:00 2001
From: Max Gu <maxgu@pinterest.com>
Date: Fri, 19 Feb 2016 14:27:22 -0800
Subject: [PATCH] Update for visibility monitoring

---
 AsyncDisplayKit/ASCellNode+Internal.h | 2 +-
 AsyncDisplayKit/ASCellNode.m          | 6 +++---
 AsyncDisplayKit/ASCollectionView.mm   | 8 +++++---
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/AsyncDisplayKit/ASCellNode+Internal.h b/AsyncDisplayKit/ASCellNode+Internal.h
index feb816467d..5481965995 100644
--- a/AsyncDisplayKit/ASCellNode+Internal.h
+++ b/AsyncDisplayKit/ASCellNode+Internal.h
@@ -10,6 +10,6 @@
 
 @interface ASCellNode (Internal)
 
-@property (nonatomic, assign) BOOL shouldObserveVisibility;
+@property (nonatomic, assign) BOOL shouldMonitorScrollViewDidScroll;
 
 @end
diff --git a/AsyncDisplayKit/ASCellNode.m b/AsyncDisplayKit/ASCellNode.m
index 61458d5ac0..42f5b0b971 100644
--- a/AsyncDisplayKit/ASCellNode.m
+++ b/AsyncDisplayKit/ASCellNode.m
@@ -38,7 +38,7 @@
   _selectionStyle = UITableViewCellSelectionStyleDefault;
   self.clipsToBounds = YES;
   if ([self.layoutDelegate respondsToSelector:@selector(visibleNodeDidScroll:inScrollView:withCellFrame:)]) {
-     self.shouldObserveVisibility= YES;
+     self.shouldMonitorScrollViewDidScroll = YES;
   }
   return self;
 }
@@ -61,7 +61,7 @@
   }
   
   if ([self.layoutDelegate respondsToSelector:@selector(visibleNodeDidScroll:inScrollView:withCellFrame:)]) {
-    self.shouldObserveVisibility = YES;
+    self.shouldMonitorScrollViewDidScroll = YES;
   }
   return self;
 }
@@ -142,7 +142,7 @@
 
 - (void)_visibleNodeDidScroll:(UIScrollView *)scrollView withCellFrame:(CGRect)cellFrame
 {
-  if (self.shouldObserveVisibility) {
+  if (self.shouldMonitorScrollViewDidScroll) {
     [self.layoutDelegate visibleNodeDidScroll:self inScrollView:scrollView withCellFrame:cellFrame];
   }
 }
diff --git a/AsyncDisplayKit/ASCollectionView.mm b/AsyncDisplayKit/ASCollectionView.mm
index 1f9a7ff89b..35ddd61c22 100644
--- a/AsyncDisplayKit/ASCollectionView.mm
+++ b/AsyncDisplayKit/ASCollectionView.mm
@@ -673,9 +673,11 @@ static NSString * const kCellReuseIdentifier = @"_ASCollectionViewCell";
 
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView
 {
-  for (ASCellNode *node in _cellsForVisibilityUpdates) {
-    if (node.shouldObserveVisibility) {
-      [node _visibleNodeDidScroll:scrollView withCellFrame:node.frame];
+  for (_ASCollectionViewCell *collectionCell in _cellsForVisibilityUpdates) {
+    ASCellNode *node = [collectionCell node];
+    if (node.shouldMonitorScrollViewDidScroll) {
+        NSLog(@"Calling _visibleNodeDidScroll");
+      [node _visibleNodeDidScroll:scrollView withCellFrame: node.frame];
     }
   }
   if (_asyncDelegateImplementsScrollviewDidScroll) {