Decimal comma in textfield

You can simply filter the text.

You can either do it during typing

Connect Editing Changed event to an IBAction

     @IBAction func editingTestField(_ sender: UITextField) {
          print(sender.text!)
          if Double(sender.text!) != nil {
               print("Num")
          } else {
               print("Not Num")
               sender.text!.removeLast()     // the double . or any alpha will disappear
          }
     }

Or at the end by checking the text is effectively a number

and, BTW, check if you should close the other threads you have opened, by marking correct answer or telling if there is still a problem.

Thanks Claude

Now I find another trouble. On the decimal pad appears a comma as decimal, and my text field doesn't recognize the comma as decimal. How can I change it to dot?

That's in simulator or on device ?

What is the problem ? Isn't your number recognized as number ?

It is a question of locale keyboard ; if you set language to US (in system settings), that should make it to dot.

May have a look here h ttps://stackoverflow.com/questions/30150829/uitextfields-numerical-pad-dot-instead-of-comma-for-float-values