Expose ASViewController's constrained size for subclass customization

Levi McCallum · Levi McCallum · commit 03bd1f435895 · 2015-10-27T11:40:43.000-07:00
diff --git a/AsyncDisplayKit/ASViewController.h b/AsyncDisplayKit/ASViewController.h
@@ -20,4 +20,13 @@
 
 - (instancetype)initWithNode:(ASDisplayNode *)node;
 
+/**
+ * The constrained size used to measure the backing node.
+ *
+ * @discussion Defaults to providing a size range that uses the view controller view's bounds as
+ * both the min and max definitions. Override this method to provide a custom size range to the
+ * backing node.
+ */
+- (ASSizeRange)nodeConstrainedSize;
+
 @end
diff --git a/AsyncDisplayKit/ASViewController.m b/AsyncDisplayKit/ASViewController.m
@@ -40,9 +40,7 @@ - (void)loadView
 - (void)viewWillLayoutSubviews
 {
   [super viewWillLayoutSubviews];
-  CGSize viewSize = self.view.bounds.size;
-  ASSizeRange constrainedSize = ASSizeRangeMake(viewSize, viewSize);
-  [_node measureWithSizeRange:constrainedSize];
+  [_node measureWithSizeRange:[self nodeConstrainedSize]];
 }
 
 - (void)viewDidLayoutSubviews
@@ -61,4 +59,12 @@ - (void)viewWillAppear:(BOOL)animated
   [_node recursivelyFetchData];
 }
 
+// MARK: - Layout Helpers
+
+- (ASSizeRange)nodeConstrainedSize
+{
+  CGSize viewSize = self.view.bounds.size;
+  return ASSizeRangeMake(viewSize, viewSize);
+}
+
 @end
