Demote IGAssert for collection view delegate to warning

Summary: This are not critical enough to trigger an assertion instead of a warning.

Reviewed By: DimaVartanian

Differential Revision: D49326036

fbshipit-source-id: 50bbb6f57208ddea8cc1ead2db3b347f9e0c2f87

Source/IGListKit/Internal/IGListAdapter+UICollectionView.m

@@ -282,7 +282,7 @@ - (void)collectionView:(UICollectionView *)collectionView didUnhighlightItemAtIn
 #pragma mark - UICollectionViewDelegateFlowLayout
 
 - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
-    IGAssert(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
+    IGWarn(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
 
     CGSize size = [self sizeForItemAtIndexPath:indexPath];
     IGAssert(!isnan(size.height), @"IGListAdapter returned NaN height = %f for item at indexPath <%@>", size.height, indexPath);
@@ -292,28 +292,28 @@ - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollection
 }
 
 - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
-    IGAssert(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
+    IGWarn(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
     return [[self sectionControllerForSection:section] inset];
 }
 
 - (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
-    IGAssert(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
+    IGWarn(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
     return [[self sectionControllerForSection:section] minimumLineSpacing];
 }
 
 - (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {
-    IGAssert(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
+    IGWarn(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
     return [[self sectionControllerForSection:section] minimumInteritemSpacing];
 }
 
 - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section {
-    IGAssert(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
+    IGWarn(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
     NSIndexPath *indexPath = [NSIndexPath indexPathForItem:0 inSection:section];
     return [self sizeForSupplementaryViewOfKind:UICollectionElementKindSectionHeader atIndexPath:indexPath];
 }
 
 - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section {
-    IGAssert(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
+    IGWarn(![self.collectionViewDelegate respondsToSelector:_cmd], @"IGListAdapter is consuming method also implemented by the collectionViewDelegate: %@", NSStringFromSelector(_cmd));
     NSIndexPath *indexPath = [NSIndexPath indexPathForItem:0 inSection:section];
     return [self sizeForSupplementaryViewOfKind:UICollectionElementKindSectionFooter atIndexPath:indexPath];
 }