Expose asyncdisplaykit_node in _ASDisplayView same as in _ASDisplayLa…

…yer #trivial (TextureGroup#773)

* Expose asyncdisplaykit_node in _ASDisplayView same as in _ASDisplayLayer

* Change comment

Source/Details/_ASDisplayView.h

@@ -20,8 +20,16 @@
 // This class is only for use by ASDisplayNode and should never be subclassed or used directly.
 // Note that the "node" property is added to UIView directly via a category in ASDisplayNode.
 
+@class ASDisplayNode;
+
 @interface _ASDisplayView : UIView
 
+/**
+ @discussion This property overrides the UIView category method which implements this via associated objects.
+ This should result in much better performance for _ASDisplayView.
+ */
+@property (nonatomic, weak) ASDisplayNode *asyncdisplaykit_node;
+
 // These methods expose a way for ASDisplayNode touch events to let the view call super touch events
 // Some UIKit mechanisms, like UITableView and UICollectionView selection handling, require this to work
 - (void)__forwardTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;

Source/Details/_ASDisplayView.mm

@@ -27,7 +27,6 @@
 #import <AsyncDisplayKit/ASLayout.h>
 
 @interface _ASDisplayView ()
-@property (nullable, atomic, weak, readwrite) ASDisplayNode *asyncdisplaykit_node;
 
 // Keep the node alive while its view is active.  If you create a view, add its layer to a layer hierarchy, then release
 // the view, the layer retains the view to prevent a crash.  This replicates this behaviour for the node abstraction.