How to Edit Uialertaction Text Font Size and Color

Change UIAlertController's title fontsize

You can make title and message of UIAlertController attributed by using this code. You can customize as per your need. You can see the result in the image. I am not sure you can put it on Appstore.

func showAlert() {
  let alert = UIAlertController(title: "", message: "", preferredStyle: .actionSheet)        
  let titleAttributes = [NSAttributedStringKey.font: UIFont(name: "HelveticaNeue-Bold", size: 25)!, NSAttributedStringKey.foregroundColor: UIColor.black]
  let titleString = NSAttributedString(string: "Name Last name", attributes: titleAttributes)     
  let messageAttributes = [NSAttributedStringKey.font: UIFont(name: "Helvetica", size: 17)!, NSAttributedStringKey.foregroundColor: UIColor.red]
  let messageString = NSAttributedString(string: "Company name", attributes: messageAttributes)
  alert.setValue(titleString, forKey: "attributedTitle")
  alert.setValue(messageString, forKey: "attributedMessage")
  let labelAction = UIAlertAction(title: "Label", style: .default, handler: nil)
  let deleteAction = UIAlertAction(title: "Delete", style: .destructive, handler: nil)
  let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
  alert.addAction(labelAction)
  alert.addAction(deleteAction)
  alert.addAction(cancelAction)
  self.navigationController?.present(alert, animated: true, completion: nil)

}

How to change font color on UIAlertController on particular action sheet?

Use .destructive instead of .default for the action style.

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