expose trait collection

Summary: this can be helpful when section controllers calculate size depending on the size class Differential Revision: D50425042 fbshipit-source-id: 5fbafe1b0662ffb428c42bf99593868915dfc6c7
Instagram · Oct 23, 2023 · 53a96a9 · 53a96a9
1 parent 5e79f8a
commit 53a96a9
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diff --git a/Source/IGListKit/IGListAdapter.m b/Source/IGListKit/IGListAdapter.m
@@ -987,6 +987,10 @@ - (CGSize)containerSize {
     return self.collectionView.bounds.size;
 }
 
+- (UITraitCollection *_Nullable)traitCollection {
+    return self.collectionView.traitCollection;
+}
+
 - (UIEdgeInsets)containerInset {
     return self.collectionView.contentInset;
 }

diff --git a/Source/IGListKit/IGListCollectionContext.h b/Source/IGListKit/IGListCollectionContext.h
@@ -26,6 +26,8 @@ NS_ASSUME_NONNULL_BEGIN
 NS_SWIFT_NAME(ListCollectionContext)
 @protocol IGListCollectionContext <NSObject>
 
+@property (nonatomic, nullable, readonly) UITraitCollection *traitCollection;
+
 /**
  The size of the collection view. You can use this for sizing cells.
  */