TextView Counter On Typing And Count New Line Swift IOS - ios

Question

I want to count newlines ("\n") in a textview.
Or, more specifically, I want to make textview box to count the characters when typing ( +1 ) in label. Also count ( +2 ) when the text have new line and counter ( Label ) must be continuous.
Here is my code:
func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
let allowedChars = 70
let charsInTextView = -txtmessage.text.count
let remainingChars = allowedChars + charsInTextView
if (text == "\n") {
let remainingChars = 70 - (txtmessage.text.count * 2 )
countlabel.text = String(remainingChars)
}
if (text != "\n"){
countlabel.text = String(remainingChars)
}
return true
}

Answer 1

import UIKit
import PlaygroundSupport
class ViewController: UIViewController {
let textView = UITextView(frame: CGRect(origin: .zero, size: CGSize(width: 100, height: 100)))
override func viewDidLoad() {
super.viewDidLoad()
view.addSubview(textView)
textView.delegate = self
textView.backgroundColor = .white
}
}
extension ViewController: UITextViewDelegate {
func textViewDidChange(_ textView: UITextView) {
guard let text = textView.text else {
return
}
let totalLength = text.count
let newlineCount = text.filter {$0 == "\n"}.count
print("Total characters are \(totalLength) of which \(newlineCount) are newLines total of all characters counting newlines twice is \(totalLength + newlineCount)")
}
}
let v = ViewController()
v.preferredContentSize = CGSize(width: 1024, height: 768)
PlaygroundPage.current.liveView = v