UICollectionView Footer

Question

I am trying to add footer to the UICollectionView.

Following is my code,

UICollectionView is added through IB

IN viewDidLoad I register the footer,

[mCollectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"footer"];

And implemented following method

- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView   viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
    UICollectionReusableView *reusableview = nil;

    if (kind == UICollectionElementKindSectionFooter) {
      UICollectionReusableView *headerView = [mCollectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"footer" forIndexPath:indexPath];

      [headerView addSubview:mFooterView];
      reusableview = headerView;
   }
   return reusableview;
}

But My application keep crashing and below is the log,

*** Assertion failure in -[UICollectionView _dequeueReusableViewOfKind:withIdentifier:forIndexPath:], /SourceCache/UIKit/UIKit-2380.17/UICollectionView.m:2249

Any help is appreciated.

Thanks.

Answer 1

in your code why you are dequeing a header view and adding the footer to it ?

the normal implementation of this method is :

- (UICollectionReusableView *)collectionView:(UICollectionView *)theCollectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)theIndexPath 
{

   UICollectionReusableView *theView;

   if(kind == UICollectionElementKindSectionHeader)
   {
      theView = [theCollectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"header" forIndexPath:theIndexPath];
   } else {
      theView = [theCollectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"footer" forIndexPath:theIndexPath];
   }

   return theView;
}