How can you intercept pasting into a NSTextView to remove unsupported formatting?

Question

I\'m trying to create a simple NSTextView-based window for simple WYSIWYG editing. However, I only want to allow certain types of formatting (e.g. Bold, Italic, Underline a

Answer 1

In your NSTextView subclass:

  override func paste(_ sender: Any?) {
     pasteAsPlainText(sender)
  }