Strikethrough UITableView cell text after cell containing String - ios

Question

I'd like to strikethrough all cell text in UITableView after a specific line of text.
Example (after "+")
I think I'm close, but the strikethrough isn't applied in the Simulator. (build is successful)
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "Cell")
if indexPath.row > dailyTasks.index(of: "+")! {
let attributeString: NSMutableAttributedString = NSMutableAttributedString(string: dailyTasks[indexPath.row])
attributeString.addAttribute(NSAttributedStringKey.strikethroughStyle, value: 1, range: NSMakeRange(0, attributeString.length))
cell.textLabel?.attributedText = attributeString
} else {
cell.textLabel?.text = dailyTasks[indexPath.row]
}
cell.textLabel?.font = UIFont(name: "GillSans-Light", size: 17)
cell.indentationLevel = 1
cell.textLabel?.addCharactersSpacing(1.2)
cell.backgroundColor = UIColor(red:0.99, green:0.97, blue:0.91, alpha:1.0)
cell.selectionStyle = UITableViewCellSelectionStyle.none
return cell
}

Answer 1

Don't set the font on the label if you are using an attributed string; instead set the font as an attribute. Here is a playground that shows how to do it:
import UIKit
import PlaygroundSupport
let label = UILabel()
let text = "sample text"
let view = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
let attributes: [NSAttributedStringKey: Any] =
[NSAttributedStringKey.font: UIFont(name: "GillSans-Light", size: 17)!,
NSAttributedStringKey.foregroundColor : UIColor.white,
NSAttributedStringKey.strikethroughStyle: 1]
label.attributedText = NSAttributedString(string: text, attributes: attributes)
view.addSubview(label)
label.sizeToFit()
PlaygroundPage.current.liveView = view