Sticking a TableView Header to the top, causes the header to not "interact" when user scrolls down

2
votes

I am sticking my UITableView header to the top when user scrolls down the UITableView. The header view itself is a UIButton which does something when clicked.

The button responds well to touches when contentOffset Y is 0. However when the user scrolls down, the button still sticks to the top but every touches "passes through" it.

Here is my code to stick the header to the top:

  var offsetY = scrollView.contentOffset.y;
  var headerContentView: UIView = self.tableView.tableHeaderView?.subviews[0] as UIView;

  headerContentView.frame = CGRect(x: 0, y: max(0, offsetY), width: headerContentView.bounds.width, height: headerContentView.bounds.height);

Thanks.

1
iosuitableviewswiftuiscrollviewuiscrollviewdelegate

1 Answers

0
votes

If you're going to be moving the view around yourself, don't use tableHeaderView at all. Instead add it as a subview of the table view directly and keep a reference to it. Then in scrollViewDidScroll: layout the view's Y offset according to scrollView.contentOffset.y.

You may need to trigger this layout in viewDidLoad so that it appears properly before any scroll events happen. If the view shouldn't overlap the top cell when the table is scrolled to the top, set the view's height to the table's contentInset's top.