UITableView contentOffSet is not working properly

Question

In viewWillAppear, I have added UISearchBar as my headerview of UITableView. When view loads, I hides UISearchbar under <

Answer 1

I fixed it with layoutIfNeeded()

    self.articlesCollectionView.reloadData()
    self.articlesCollectionView.layoutIfNeeded()
    self.articlesCollectionView.setContentOffset(CGPoint(x: 0, y: 40), animated: false)