Adding a label to table view header

[johno]

Hello everyone - my first post…
I’ve worked through Brian Moakley’s excellent “Beginning Table Views” video tutorial and now want to add a label to the header. I can do this by doing this:

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) → UIView? {
let header = UITableViewHeaderFooterView()
let frame = tableView.frame
let label = UILabel(frame: CGRect(x: tableView.frame.width/2, y: 5, width: tableView.frame.width/5, height: 20))
header.addSubview(label)
label.backgroundColor = UIColor.blue
header.addSubview(label)
return header
}

However, I’ve had to define the size of the label in relation to the tableView width and then use fixed top and height values. I really want to do the size in relation to the header (UITableViewHeeaderFooterView()), but these are not available in this function.
I realise I can set the height of the header, but prefer to use .automaticDimension.
So, my question is, is it possible to align the label in the header with margins that I define?
Hope that’s clear,
Thanks, johno

[johno]

Hello again,
If anyone is interested, I’ve solved my question! Here it is.
This adds a right justified label with the text “Hi” to the header. Note that the issue with setting the constraint priorities is related to what appear to be spurious run-time warnings about auto layout - discussed here:

What is NSLayoutConstraint "UIView-Encapsulated-Layout-Height" and how should I go about forcing it to recalculate cleanly?

This is the code I’ve implemented and it seems to work fine. The main thing to watch will be deciding how wide to make the label

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) → UIView? {
let header = UITableViewHeaderFooterView()
let marginGuide = header.contentView.layoutMarginsGuide
let label = UILabel()
label.text = “Hi”
label.translatesAutoresizingMaskIntoConstraints = false
header.contentView.addSubview(label)
var constraint = label.widthAnchor.constraint(equalToConstant: 20)
constraint.priority = UILayoutPriority(999)
constraint.isActive = true
constraint = label.topAnchor.constraint(equalTo: marginGuide.topAnchor)
constraint.priority = UILayoutPriority(999)
constraint.isActive = true
constraint = label.trailingAnchor.constraint(equalTo: marginGuide.trailingAnchor)
constraint.priority = UILayoutPriority(999)
constraint.isActive = true
constraint = label.bottomAnchor.constraint(equalTo: marginGuide.bottomAnchor)
constraint.priority = UILayoutPriority(999)
constraint.isActive = true
return header
}

Johno

[gdelarosa]

Hi @johno and welcome to the community! That’s awesome that you were able to figure it out. Thanks for the update.

Best,
Gina