html_label_tap.swift

@objc func didTapLabel(sender: UITapGestureRecognizer) {
    var tappedImage = false
    if let index = label.characterIndexTapped(tap: sender), let _ = label.attributedText?.attribute(NSAttributedString.Key.attachment, at: index, effectiveRange: nil) as? NSTextAttachment {
        tappedImage = true
    }
    let alertTitle = tappedImage ? "Tapped Image":"Random Taps"
    let alertMessage = tappedImage ? "You just tapped the image.":"You just tapped outside the image."
    let alertController = UIAlertController(title: alertTitle, message: alertMessage, preferredStyle: .actionSheet)
    alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
    present(alertController, animated: true, completion: nil)
}