UITableView标头和文本颜色

Question

I currently have a UITableView with multiple sections.

The header for each section is defined in the delegate like this (code adjusted for testing purposes):

[Export("tableView:viewForHeaderInSection:")]
public UIView GetViewForHeader(UITableView tableView, nint section)
{
  var header = tableView.DequeueReusableHeaderFooterView("TestHeaderIdentifier");
  if(header == null)
     header = new UITableViewHeaderFooterView(new NSString("TestHeaderIdentifier"));
  header.TextLabel.Text = "Section " + section;
  header.TextLabel.TextColor = UIColor.Red;
  header.ContentView.BackgroundColor = UIColor.FromRGB(124, 255, 190);
  //.. Other customizations
  return header;
}

This seems to work fine except for one bit, the TextColor of the label.

The above code results in the following:

The background color and text itself are applied fine, but the text color remains set to the default colour. What could be the cause of this issue?

I've already tried:

• Registering the header class on the table view instead of constructing it in the delegate method (using RegisterClassForHeaderFooterViewReuse )
• Not reusing/dequeing the headers at all, constructing a new instance each time

Both to no avail.

Answer 1

I would give your two solutions:

First, change the textColor in WillDisplayHeaderView function:

public override void WillDisplayHeaderView(UITableView tableView, UIView headerView, nint section)
{

    if (headerView is UITableViewHeaderFooterView)
    {
        UITableViewHeaderFooterView v = headerView as UITableViewHeaderFooterView;
        v.TextLabel.TextColor = UIColor.Red;
    }

}

Second, you can use your own custom views instead of UITableViewHeaderFooterView :

public override UIView GetViewForHeader(UITableView tableView, nint section)
{
    //var header = tableView.DequeueReusableHeaderFooterView("TestHeaderIdentifier");
    //if (header == null)
    //    header = new UITableViewHeaderFooterView(new NSString("TestHeaderIdentifier"));
    //header.TextLabel.Text = "Section " + section;
    //header.TextLabel.TextColor = UIColor.Red;
    //header.ContentView.BackgroundColor = UIColor.FromRGB(124, 255, 190);
    ////.. Other customizations
    //return header;


    UIView view = new UIView();
    view.Frame = new CoreGraphics.CGRect(0,100,200,50);

    UILabel label = new UILabel();
    label.Frame = view.Bounds;
    label.Text = "test";
    label.TextColor = UIColor.Red;

    view.Add(label);

    return view;
}