UITableView和UICollectionView各种偏移

self.automaticallyAdjustsScrollViewInsets = NO

// cell 向下偏移解决方法

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
      return 0.01
}

override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()
        self.collectionView.contentInset = UIEdgeInsets.zero
 }