Assertion Failure in UICollectionViewData validateLayoutInRect on ios7

Question

Assertion Failure in UICollectionViewData validateLayoutInRect on iOS7.

I am trying to delete all UICollectionView items, one by o

Answer 1

You should implement invalidateLayout in your layoutClass and remove all kinds of UICollectionViewLayoutAttributes items in your config.

- (void)invalidateLayout{
  [super invalidateLayout];
  [self.itemsAttributes removeAllObjects];
}