When is preferredContentSize respected?

Now I had the same problem another time. If I put my table height calculation into viewWillAppear than it works:

public override void ViewWillAppear (bool animated)
{
    base.ViewWillAppear (animated);

    TableView.LayoutIfNeeded ();
    this.PreferredContentSize = new SizeF (320f, TableView.ContentSize.Height);
}

The code is in C# but you can easily convert it to Objective-C or Swift.

I converted testing’s code to Swift 2.0.

override func viewWillAppear(animated: Bool) {
   super.viewWillAppear(animated)
   tableView.layoutIfNeeded()
   preferredContentSize.height = tableView.contentSize.height
}