How to limit the textfield entry to 2 decimal places in swift 4?

Question

I have a textfield and I want to limit the entry to max 2 decimal places.

number like 12.34 is allowed but not 12.345

How do I do it?

Answer 1

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
            let dotString = "."

            if let text = textField.text {
                let isDeleteKey = string.isEmpty

                if !isDeleteKey {
                    if text.contains(dotString) {
                        if text.components(separatedBy: dotString)[1].count == 2 {

                                    return false

                        }

                    }

                }
            }
            return true
         }