Replace all line breaks with a space in a UITextView

Question

I have a UITextView. I want to disable all line breaks in the text view, whether they're typed manually or if the user pastes text that contains line breaks, and replace each line break with a space (" ").

How would I go about doing this? What function should I be making use of?

Answer 1

You can use UITextViewDelegate's textViewDidChange(_:) method to listen whenever the text view's text changes. Inside here, you can then replace all occurrences of a newline (\n) with an empty String ("").

class ViewController: UIViewController {
    @IBOutlet weak var textView: UITextView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        textView.delegate = self
    }
}

extension ViewController: UITextViewDelegate {
    func textViewDidChange(_ textView: UITextView) {
        let text = textView.text.replacingOccurrences(of: "\n", with: "")
        textView.text = text
    }
}

Without textViewDidChange(_:)	With textViewDidChange(_:)