Formatting Manually

[LuaiKalkatawi]

I'm trying to format the credit card number without setting the textfield class with BKCardNumberField. So I have typed this

   let bkcardNumberFormatter = BKCardNumberFormatter()

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

    textField.text = bkcardNumberFormatter.formattedStringFromRawString(newString)
    return true
}

it is formatting but it is adding one more character in the end and can't delete text after whitespace. So please could you help me with it?

[bkook]

I think you should return false in shouldChangeCharactersInRange method because you are now updating text value manually.
If you return true, your manual update executed and then iOS also updates text field again.

[LuaiKalkatawi]

I have returned it false but it is not changing anything at all. Please need your help.

[bkook]

By the way, what did you passed into formattedStringFromRawString?
What's newString?

[LuaiKalkatawi]

@bkook newString was textField.text as NSString

            let newString = textField.text! as NSString
            textField.text = cardNumberFormatter.formattedStringFromRawString(textField.text)

[bkook]

You have to pass new string instead of textField.text.
Please check textField:shouldChangeCharactersInRange:replacementString: method in BKCardNumberField.m

// objc code
NSString *newString = [currentText stringByReplacingCharactersInRange:range withString:string];

[LuaiKalkatawi]

@bkook I have typed this before and returned false it is formatting well but it is not deleting the empty space.

    func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
        
        let currentText = textField.text! as NSString
        
        let newString = currentText.stringByReplacingCharactersInRange(range, withString: string)
        textField.text = cardNumberFormatter.formattedStringFromRawString(newString)
        
        return false
    }

[bkook]

Please check below code:
https://github.com/bkook/BKMoneyKit/blob/master/BKMoneyKit/BKCardNumberField.m#L46