Swift UITableViewCell separatorStyle breaking autolayout on iPhone MIni - ios

Question

I have a UITableView which has a UITableViewCell which contains a UIImageView.
The constraints are setup such that the UIImageView has padding 20 points at the top and sides, and a size ratio of 1:1, so the UIImageView will always be square regardless of the device width.
I apply a cornerRadius to the UIImageView so the image is circular.
However.... the autolayout doesn't seem to work on the first load. But after the first load, it works perfectly.
I have tried every known combination of setNeedsLayout or layoutIfNeeded - both inside the UITableViewCell and in the UITableView code. Nothing works the first time it loads.
Please help!
Code looks like this:
class CircularProfileCell: UITableViewCell {
#IBOutlet weak var circularView: UIView!
func setup() {
circularView.layer.cornerRadius = circularView.bounds.height / 2
}
}
class CircularProfileVC: UITableViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.separatorStyle = .none
self.tableView.register(UINib(nibName: "CircularProfileCell", bundle: nil), forCellReuseIdentifier: "CircularProfileCell")
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CircularProfileCell", for: indexPath) as! CircularProfileCell
cell.setup()
return cell
}
}
Setup looks like this:

Answer 1

Because corner radius is a layer property it does not always play well with auto layout. In addition, I guess you set it up with frame properties of the view (i.e imageView.layer.cornerRadius = imageView.bounds.height/2).
Hence you should try and set the corner radius on the layoutSubviews() function of the cell. This will make sure to render the correct size
override func layoutSubviews() {
super.layoutSubviews()
imageView.layer.cornerRadius = imageView.bounds.height/2
...
}

Answer 2

This only happens when the tableView.separatorStyle = .none
So to fix it I simply leave the separator on, but set the separator color to clear
self.tableView.separatorStyle = .singleLine
self.tableView.separatorColor = UIColor.clear
Thanks to #CloudBalacing for the help. More info about this problem here