UITableViewCell gaves default blue highlight after second-third selection for .gray on macOS using Catalyst

Question

I trying to port my iOS app to macOS using Catalyst, but no matter what the UITableViewCellSelectionStyle.gray style visually show the .blue highlight, while the .style value still prints .gray. I tried to force reset it in the following functions but with no luck.

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath)
override func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath?

No matter what, it goes back .blue from .gray. If its .none, it stays .none.

Possible workaround was to set a background color manually, which feels like not right.

Answer 1

The blue color was from the focused state, so you will need to override the canBecomeFocused property in your UITableViewCell subclass

override var canBecomeFocused: Bool {
    return false
}

Answer 2

The default way of setting the selection style on Mac Catalyst did not work for me:

cell.selectionStyle = .gray

On the Mac Catalyst app the selection showed first gray then on the next click blue. To work around it I applied @Laszlo's solution. However you don't need a custom UITableViewCell. You can create a custom background view and set the .selectedBackgroundView property of the UITableViewCell instance to a custom background view.

let customSelectionBackgroundView = UIView()
customSelectionBackgroundView.backgroundColor = UIColor.red
cell.selectedBackgroundView = customSelectionBackgroundView