[collections] Add shouldAppendObjectClassToReuseIdentifier to the fac…

…tory.
muhtasib · Apr 9, 2013 · 3c9281c · 3c9281c
1 parent 65b310e
commit 3c9281c
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diff --git a/src/collections/src/NICollectionViewCellFactory.h b/src/collections/src/NICollectionViewCellFactory.h
@@ -157,6 +157,17 @@ _model.delegate = (id)[NICollectionViewCellFactory class];
  */
 - (BOOL)shouldUpdateCellWithObject:(id)object;
 
+@optional
+
+/**
+ * Asks the receiver whether the mapped object class should be appended to the reuse identifier
+ * in order to create a unique cell.object identifier key.
+ *
+ * This is useful when you have a cell that is intended to be used by a variety of different
+ * objects.
+ */
++ (BOOL)shouldAppendObjectClassToReuseIdentifier;
+
 @end
 
 /**

diff --git a/src/collections/src/NICollectionViewCellFactory.m b/src/collections/src/NICollectionViewCellFactory.m
@@ -55,6 +55,11 @@ + (UICollectionViewCell *)cellWithClass:(Class)collectionViewCellClass
 
   NSString* identifier = NSStringFromClass(collectionViewCellClass);
 
+  if ([collectionViewCellClass respondsToSelector:@selector(shouldAppendObjectClassToReuseIdentifier)]
+      && [collectionViewCellClass shouldAppendObjectClassToReuseIdentifier]) {
+    identifier = [identifier stringByAppendingFormat:@".%@", NSStringFromClass([object class])];
+  }
+
   [collectionView registerClass:collectionViewCellClass forCellWithReuseIdentifier:identifier];
 
   cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];