Make part of a UILabel bold in Swift

Question

I have a UILabel I\'ve made programmatically as:

var label = UILabel()

I\'ve then declared some styling for the label, includi

Answer 1

You can directly do on String if you prefer:

extension String {
func withBoldText(text: String, font: UIFont? = nil) -> NSAttributedString {
  let _font = font ?? UIFont.systemFont(ofSize: 14, weight: .regular)
  let fullString = NSMutableAttributedString(string: self, attributes: [NSAttributedString.Key.font: _font])
  let boldFontAttribute: [NSAttributedString.Key: Any] = [NSAttributedString.Key.font: UIFont.boldSystemFont(ofSize: _font.pointSize)]
  let range = (self as NSString).range(of: text)
  fullString.addAttributes(boldFontAttribute, range: range)
  return fullString
}}

Usage:

label.attributeString = "my full string".withBoldText(text: "full")