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

Only Two decimal point allow and only one "." allow

 func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {

                    let text: NSString = textField.text! as NSString
                    let resultString = text.replacingCharacters(in: range, with: string)


        //Check the specific textField 
         if textField == costTextField {
             let textArray = resultString.components(separatedBy: ".")
             if textArray.count > 2 { //Allow only one "."
                return false
             }
           if textArray.count == 2 {
              let lastString = textArray.last
             if lastString!.count > 2 { //Check number of decimal places 
                   return false
               }
            }
          }
           return true
       }