How to force a dot for decimal pad

A simple way is to force replace "," sign with "."

Use

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

If you want to avoid "," char:

    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        if string == "," {
            textField.text = textField.text! + "."
            return false
        }
        return true     // Could also filter on numbers only
}

You have to set the delegate of the textField to the class.

If you have several textFields, need to check this is the right one.

A simple way is to define a tag for the testFields.

So code should look like:

let textFieldIPAddressTag = 1
let textField2Tag = 2    // May choose more explicit names…

// You set the tag in IB in property inspector

// You set the delegate in connections inspector

// If the textField for IP address is with tag 1

    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        if textField.tag == textFieldIPAddressTag {
             if string == "," {
                 textField.text = textField.text! + "."
                 return false
             }
       }
        return true     // We accept all typing otherwise ; but you could also filter on numbers only
    }

Thanks Claude; I am already doing something similar, but this doesn't solve the user experience problem.

The field clearly shows that it should be dotted-decimal format and they know it should be dotted-decimal format, but the only thing they have on their Decimal pad is a comma. This leads them to confusion.

I want the keypad to actually show a DOT.

It's a bit of a kludge but you might be able to add a UILabel or UIImageView on top of the keypad in just the right location to cover the "," with a "."

What is your locale ? en_US ? or en or en_GB ? To get decimal point on keyboard, seems you need en_US

Have a look here

https://stackoverflow.com/questions/51233517/get-decimal-separator-of-decimal-pad-keyboard-on-ios

It doesn't matter what MY locale is. I need the decimal keypad to function as if the USER's locale is en-US regardless of what her locale is...and I can't (shouldn't) change the user's locale. Basically I want to override their locale for one UITextField. How do I do that?

I have exactly the same problem.. I have tried many solutions found in various forums but nothing seem to work for iOS13..

I have a UITextField that should accept IP address (so only numbers and "." dots), it works well in english language but if i set it in italian (for example) it shows a comma instead of the dot. My UITextField also validates the IP address so the comma obviosly doesn't pass the validation.

Very frustrating!

This is how I bypassed the problem until a real solution is found... IT WORKS WITH iOS 13

I created a function that checks the current locale of the device and sets the keyboards accordingly. So for "en_GB" and 'en_US" it will display a Decimal keyboard (with the dot) and for anything else it will show a different keyboard (in my case I choose "numbersAndPunctuation").

func SetCorrectDecimalKeyboard(UITextField: UITextField)  {
   
    let language = Locale.current.identifier
   
    if (language == "en_GB" || language == "en_US") {
       
        print("[LOG] \(language) - Setting Decimal keyboard")
        UITextField.keyboardType = UIKeyboardType.decimalPad
    }
    else {
       
        print("[LOG] \(language) - Setting Numbers & Punctuation keyboard")
        UITextField.keyboardType = UIKeyboardType.numbersAndPunctuation
    }
}

You can more languages that support the decimal keyboard in this function if needed.

Usage:

SetCorrectDecimalKeyboard(UITextField: myTextFieldName)  
//Replace myTextFieldName with the name of your UITextField that you want to have a different keyboard for

While this doesn't resolve your issue I hope it helps you bypass it my friend! 🙂

This solution from @Jxa13 is good but we need to know every locale which have dot in decimalPad or comma in order to make code work properly for everyone. If I find something with this case I'll post this here